800 Gas Systems
800 Gas Systems
800 Gas Systems
Phone: 281-359-1519
Fax: 281-359-2085
Email: info@allestec.com Publication REV F
ALLESTEC 800 INDUSTRIAL GAS / FIRE CONTROL PANEL
AUTOMATIC SUPPRESSION SYSTEM
ONGUARD is a registered trade mark and trade name for Allestec Corporation
DEPARTMENT ____________________________________________
NAME ___________________________________________________
DATE ___________________________________________________
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Table Of Contents
1. INTRODUCTION ...................................................................................................................... 8
2. SPECIFICATIONS.................................................................................................................. 10
2.1 GENERAL....................................................................................................................... 10
2.2 ENVIRONMENT ............................................................................................................. 10
2.3 MODULE SPECIFIC ....................................................................................................... 10
3. INSTALLATION ..................................................................................................................... 12
3.1 BENCH TOP TRIAL........................................................................................................ 12
3.2 PANEL MOUNTING ....................................................................................................... 12
3.3 FIELD WIRE INSTALLATION......................................................................................... 12
3.4 STANDARD ENCLOSURE ............................................................................................. 20
3.5 PANEL TERMINAL STRIPS ........................................................................................... 20
3.6 POWER SUPPLY REQUIREMENT................................................................................ 21
3.7 EARTH GROUND........................................................................................................... 21
3.8 ZONING THE MODULE WITHIN THE RACK .............................................................. 21
3.9 MODULE INSTALLATION - LOCATION - RESTRICTIONS ........................................... 21
3.10 BLANK (SPARE) MODULE ……………………………………………….…………………..22
3.11 SPECIFIC FUNCTIONS ................................................................................................. 22
3.12 POWER UP RESET ....................................................................................................... 22
3.13 LED INDICATORS.......................................................................................................... 22
3.14 FUSE MONITORING ...................................................................................................... 22
3.15 SYSTEM BUSS .............................................................................................................. 22
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Table Of Contents
6. MANUAL PULL MODULE ..................................................................................................... 33
6.1 INHIBIT ........................................................................................................................... 33
6.2 FAULT ANNUNCIATION ................................................................................................ 33
6.3 TERMINAL STRIP DESIGNATION ................................................................................ 33
6.4 MANUAL PULL DIP SWITCH SELECTIONS ................................................................. 34
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Table Of Contents
10. RELAY MODULE ................................................................................................................. 48
10.1 RELAY OUTPUT FUNCTIONS .................................................................................. 48
10.2 ALARM ACKNOWLEDGING ...................................................................................... 48
10.3 RELAY MODULE DIP SWITCH SELECTIONS .......................................................... 48
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Table Of Contents
13.28 ALTERNATIVE REMOTE CALIBRATION PREPARATION.......................................... 62
13.29 CL - CALIBRATE Lo (Zero) .......................................................................................... 62
13.30 CH - CALIBRATE High (Span) ..................................................................................... 62
13.31 REMOTE CALIBRATION.............................................................................................. 62
13.32 d0 - DISPLAY ZERO (Dead Band) ............................................................................... 63
13.33 ALARM SET POINTS - C1 Only Agency Restrictions ................................................. 63
13.34 PROGRAMMING FOR THE C2-C4 H2S GAS CONFIGURATION .............................. 64
13.35 INTRODUCTION .......................................................................................................... 64
13.36 HH (HIGH HIGH) ALARM LATCHING .......................................................................... 64
13.37 HI (HIGH) ALARM LATCHING ..................................................................................... 64
13.38 Lo (LOW) ALARM LATCHING ...................................................................................... 64
13.39 VIEWING DISPLAY FRACTIONAL INTEGERS ........................................................... 64
13.40 PROGRAMMING FOR THE OXYGEN GAS CONFIGURATION ................................. 65
13.41 INTRODUCTION .......................................................................................................... 65
13.42 SET POINT THRESHOLD LEVELS ............................................................................. 65
13.43 HI (HIGH) SET POINT - Adjusting rising alarms ........................................................... 65
13.44 L1 SET POINT - Adjusting falling alarms ...................................................................... 65
13.45 L2 SET POINT - Adjusting falling alarms ...................................................................... 65
13.46 HI (HIGH) ALARM LATCHING ..................................................................................... 65
13.47 L1 (LOW 1) ALARM LATCHING ................................................................................... 65
13.48 L2 (LOW2) ALARM LATCHING .................................................................................... 65
13.49 VIEWING DISPLAY FRACTIONAL INTEGERS ........................................................... 65
13.50 RELAY OUTPUT SELECTIONS FOR C1 THROUGH C4 CONFIGURATIONS........... 66
13.51 ALARM MODULE COMMUNICATION C1-C4 .............................................................. 66
13.52 RELAY OUTPUT FOR C5 OXYGEN CONFIGURATION ............................................. 67
13.53 ALARM MODULE COMMUNICATION C5.................................................................... 67
13.54 FAULT ANNUNCIATION .............................................................................................. 68
13.55 INDUCED FAULTS....................................................................................................... 68
13.56 MALFUNCTION FAULTS ............................................................................................. 68
13.57 TERMINAL BLOCK DESIGNATIONS........................................................................... 68
13.58 REMOTE RESET ......................................................................................................... 68
13.59 FAULT EXTERNAL OUTPUT....................................................................................... 68
13.60 RECORDER OUTPUT (optional).................................................................................. 68
13.61 PART NUMBER INFORMATION.................................................................................. 68
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1. INTRODUCTION
The installer must read these instructions carefully and fully understand the operation of this system
prior to entering it into service. Save this manual and any related documentation for future reference.
WARNING: This manual is to be reviewed by qualified service and installation personnel only.
To avoid injury and / or electrical shock, do not perform any installation or servicing
other than that contained in this manual, unless qualified.
The Allestec series 800 Fire / Gas Panel is primarily designed to interface to stand-alone optical fire de-
tector heads, four wire smoke detectors, and gas transmitters, activating suppression systems utilizing
the Class B configuration. Various modules consist of the basic panel to provide a complete non-coded
system to accept industrial detector outputs and appliances. The modules can be utilized as stand-alone
in some signaling applications. The flexible rack housing allows users to purchase up to 16 modules as
expansion is needed. All modules incorporated into the panel communicate to each other through the
rear motherboard to eliminate external wiring. System designers can select the various modules below
to satisfy the requirement for a complete system. Duplicated modules within the same rack are permitted
to allow expansion. The front locking panel door, P/N 1192-XX is required to meet NFPA requirements
for fire modules, unless the panel is located behind a locking cabinet with a viewing window.
Input Module: Accepts up to three optical or four wire smoke detectors with dry relay contacts
FM Approved and the ability to vote between the three channels. Once activated by a detector,
CE Listed the Input Module can initiate the Release, Alarm and Relay Module.
800-1440
Input Vote Module: Accepts up to two optical or four wire smoke detectors with dry relay contacts
CE Listed and the ability to vote between each channel or vote between other Input Vote
800-1530 Modules. Once activated by a detector, the Input Vote Module can initiate the
Release, Alarm and Relay Module.
Manual Pull Module: Accepts Manual Pull Stations in parallel and has an inhibit feature. Once acti-
FM Approved vated by a Manual Pull Station, the module can initiate the Release, Alarm and
CE Listed Relay Module.
800-1441
Alarm Module: The Input, Manual Pull, or Gas Module activates this module. When activated,
FM Approved the Alarm Module will sound the audible appliance devices and turn on the
CE Listed strobe. This module can be activated and silenced remotely.
800-1442
Release Module: The Input or Manual Pull module activates the Release module. This module can
FM Approved be selected to activate a main and / or reserve tank through the program. Pa-
CE Listed rameters are selected for timed or instant release. This module has an inhibit
800-1443D feature to test the system.
Water Mist Release The Input or Manual Pull module activates the Release module. This module is
Module: programmed to cycle the water mist solenoid valve on/off for various lengths of
CE Listed time, then stand by for observing post ignition occurrence. This module conforms
800-2800 to the NFPA 750.
Relay Module: Auxiliary relay outputs are provided from this module. Three separate relays can
FM Approved trip on a general, auxiliary or fault alarm. The module has an audible alarm that
CE Listed can be silenced and has different sounds than other modules.
800-1760
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Fault Module: System malfunctions will be annunciated from the Fault Module. The Fault Mod-
FM Approved ule is common to all modules in the mounting rack. This module has an auxiliary
CE Listed fault input.
800-1444
Abort Module: Single digital display counts down remaining time until discharge. Various
FM Approved modes of operation are available from the Release Module. The Abort Module
800-1436 can be utilized in the Allestec panel or panels by other manufacturers.
Abort Module: Dual digital display counts down remaining time for two independent discharge
FM Approved systems. The Abort Module can be utilized in the Allestec panel or panels by
800-1437 other manufacturers.
Gas Module: The NT420 Gas Module accepts industrial standard 4-20mA output and can
800-1457 communicate to the Alarm, Relay and Fault Module. Systems requiring only gas
FM Approved detection may utilize the module exclusively. Three alarm points are controlled
CE Listed by an integral microprocessor, programmable from the front panel. This module
can accept combustible, toxic or oxygen sensor inputs.
Locking Enclosure: Accommodates all 800 series modules into a standard 19” EIA rack. Rack size
FM Approved available is from 2 to 16 slots. This enclosure has an acrylic window that will
CE Listed lock, allowing full view of the modules.
800-1192
Open Enclosure: Accommodates all 800 series modules into a standard 19” EIA rack. Rack size
800-1690 available is from 2 to 16 slots. This enclosure has an architect low profile style
CE Listed bezel.
Blank Face Plate: Accommodates unoccupied slots of the rack. Module includes a jumper to allow
FM Approved for the required designation of the first occupied slot. One of these style face
CE Listed plates are required per rack if a spare slot is accommodated.
800-1315
Blank Face Plate: Accommodates unoccupied slots of the rack. Can be located anywhere except
FM Approved as the first module.
CE Listed
800-1785
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2. SPECIFICATIONS
2.1 GENERAL
System operating voltage: 20 – 28 VDC, 24V nominal.
Alarm Module supervised relay outputs – fused for 2A, 24VDC, each channel.
PCB construction: 1/16” 2 OZ., FR-4 fiberglass, double sided, plated through holes, solder mask.
Module size: 3.5”H X 1”W X 7” deep.
Rack: Steel, yellow zinc chromate finish.
2.2 ENVIRONMENTAL
Operating ambient temperature: 0 Degrees Fahrenheit to 150 Degrees Fahrenheit.
Operating humidity: non-condensing 0 – 90%.
Manual Pull Module: Operating Current @ 24 VDC quiescent: 25mA, alarm: 42mA.
FM Approved Fuse: Module power : F1 1/32A 5mm glass.
CE Listed Dry relay output: 5A 30 VDC.
800-1441 End of line resistor: 3.9K .5W 5% carbon composition P/N 1211.
Alarm Module: Operating Current @ 24 VDC quiescent: 30mA, alarm: 90mA (excluding appli-
FM Approved ance circuits).
CE Listed Fuse: Module power : F1 1/32A 5mm glass. Bell F2 2A, Horn F3 2A, Strobe F4
800-1442 2A.
Supervised relay outputs: Each relay – 2A 24VDC.
End of line resistor: 3.9K .5W 5% carbon composition P/N 1211.
Release Module: Operating Current @ 24 VDC quiescent: 70mA, alarm: 107mA – no load.
FM Approved Supervised relay outputs fused: Each relay - 4A 24 VDC F1, F2 P/N 1269.
CE Listed Discharge Relay: SPDT 5A 30 VDC, 250 VAC dry contact.
800-1443D Contact Allestec for larger solenoid load requirements.
Water Mist Release Operating Current @ 24 VDC quiescent: 70mA, alarm: 70mA no load.
Module: Supervised relay outputs fused: 3A nominal, 6A surge electronic auto-reset,
CE Listed non-replaceable.
800-2800 Fault relay output: SPDT 5A 30 VDC, 250VAC dry contact.
Contact Allestec for larger solenoid load requirements.
Page 10
Relay Module: Operating Current @ 24 VDC quiescent, 20mA, maximum 95mA.
FM Approved Three dry relay outputs each SPDT: 5A 30VDC, 250 VAC.
CE Listed
800-1760
Gas Module: Operating current @ 24V, 130mA maximum @ 20mA sensor input;
FM Approved 85mA quiescent at 4mA sensor input.
CE Listed Dry relay alarm outputs: 5 amps, 30VDC resistive, 250VAC.
800-1457 Fault output: Open collector transistor – sinks 24VDC at 1 amp.
Gas sensor fuse: Maximum fuse – 3A P/N 1529.
Display: Red 7 segment display: Low scale displays ur for under range readings
below -9. High scale displays 1H for 100, then or for over range and OC for over
current.
Dominant wavelength: 640nm.
Size: .3” high
Weight: 4.8 Oz.
Operational Features:
Optional 4-20mA recorder output.
Open collector fault transistor output.
Over range, under range, fault annunciation.
Three levels of alarm set points activate associated relays.
Real time digital display of 0-25mA current in program mode.
Module is able to interface to any standard 4-20mA output device.
Able to read and display %LFL, PPM, %OXYGEN.
Compatible with all model 800 modules.
Set points, relay functions, calibrations are fully programmable from front panel.
Design Features:
Linear scale, digital filter, 100 millisecond sampling rate. integral microprocessor
design. true analog to digital conversion, memory retention with loss of power,
input power reverse polarity protected, true digital display representation of loop
current.
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3. INSTALLATION
3.1 BENCH TOP TRIAL
It is highly recommended that the entire system be connected on a bench top to establish correct module
DIP switch locations and operating verification. Connect initiating devices, appliances and solenoids with-
out their respective tanks to emulate an actual alarm sequence. Become familiar with the various options
available and know what the sequence of events of the panel are, before permanently installing the sys-
tem.
NOTE: After resetting any module, allow two seconds to expire before proceeding to another function.
Color coded wires are recommended for ease of identification while installing the system. The use of
stranded copper wire is recommended. The field wire diagram of Figures 4,5,6,8 illustrates the modules
configured with inputs and outputs being utilized for a typical installation.
CAUTION: DO NOT LOCATE PANEL SIGNAL / SENSORY WIRES IN CONDUIT WITH AC POWER
OR ANY TYPE OF LINE THAT MAY CONTAIN AC POWER AND FREQUENCY
COMPONENTS THAT ARE REPRESENTATIVE OF AC VOLTAGES. ISOLATE SIG-
NAL / SENSORY WIRES FROM AC CARRYING WIRES.
Power and ground wire gauge must be of sufficient size to ensure that the voltage drop at the maximum
current draw will not reduce operating voltage at the last initiating detector or appliance to less than
manufacturers recommended rating.
Solenoid circuits will have no more than 5 ohms resistance per each conductor. Bell, horn and strobe will
have no more than 5 ohms resistance per each conductor. 16 AWG is the minimum recommended wire
size for the output appliance circuits.
The initiating device relay signal conductors will have no more than 10 ohms resistance per each single
conductor. All other panel signal wiring will have no more than 10 ohms resistance per each conductor.
18 AWG wire is the minimum size recommended for these signal field wires. Wire size smaller than 20
AWG is not recommended for installation.
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Figure 1. Complete assembled view (ten channel rack illustrated)
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Figure 2. Recommended panel cut-out
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Figure 3. Exploded view assembly
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Figure 4. Field wire installation
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Figure 5. Field wire installation – continued
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Figure 6. Field wire installation - continued
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Figure 7. Hole location to mount Abort Module bezel
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3.4 STANDARD ENCLOSURE
The standard EIA 19 inch rack will accept from two to sixteen modules. The user can specify the amount
of slots required to satisfy the installation and will specify additional slots if future expansion is required.
When fully expanded, the rack will consist of the following:
● Sixteen, ten-slot terminal strips mounted to the rear of the panel designated as TB1. Electrical connec-
tions for appliances, signal wires and detectors are connected here.
● Twelve, three-slot terminal strips mounted to the rear of the panel designated as TB2. These terminals
will allow the power and negative to be connected to the motherboard. Input terminal #1 of TB2 is the
+24VDC and terminal # 2 is common to negative. These terminal strips are electrically connected on
the motherboard.
● Electrical connections on the motherboard to route signals to and from each module.
The positive +24V connections are bussed together and are located at TB2-1 on the rear of the panel.
Connect the redundant power supply positive to any one of these TB2-1 locations. All negative connec-
tions are bussed together and are located at TB2-2. Connect the power supply negative to TB2-2. TB2-
3 is utilized for a common reset on specified modules or as a deviation port.
Wire diagrams illustrating the rear panel view of the terminal strips will include some terminal strips
where there will be no connection (N.C.). Refer to the field wiring diagrams for more specifics and Figure
9 for terminal strip designations.
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3.6 POWER SUPPLY REQUIREMENT
This panel can be utilized only in installations capable of supplying DC power where two independent
and reliable DC power sources are available. The recommended power backup should be rated to sup-
ply enough reserve power to provide for the entire system for 24 hours. The power source must include
a main power supply to power the system and a backup power supply in the event that the main power
is lost. In most applications, the standard arrangement would include a power supply connected to
115VAC with the same source charging the backup batteries. This backup power supply must not inter-
fere with the operation of the panel if the primary power is lost. Refer to the NFPA 72 requirements to
satisfy the correct procedure for supplying DC power to the system.
CAUTION: DO NOT INSERT OR REMOVE ANY MODULE WHILE THE SYSTEM IS UNDER POWER
OR ACCIDENTAL AGENT DISCHARGE MAY RESULT IF UTILIZING THE RELEASE
MODULE.
For calculating the correct 24 VDC regulated power supply, add the maximum power of each detector,
module and appliance. Add 25% of that calculation back into the Figure. Example:
Observe conditions where the rise of ambient temperature requires power supply de-rating. Read the
primary and backup power supply specification sheet for more information. Although some applications
utilize an earth grounded power supply, Allestec recommends the power supply be floating.
The location of modules within the rack is at the discretion of the installer, however the Fault Module
must always be the last module located to the right of other modules (except the blank modules), as
viewed from the front. After a module has been located in the rack and wired, the module must remain at
that location. Multiple modules may be placed in the same rack provided the customer understands the
full operation of the complete system and that moving a wired module to another slot must require that
the associated wiring also be moved. The rack can accommodate all fire modules and gas modules, or a
combination of both types of protection.
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3.10 BLANK (SPARE) MODULE
For Blank Module P/N 1315, install a jumper at J1 location ONLY if that module is the first location on
the LEFT side of the rack as viewed from the front, or remove the jumper, locate it in the spare jumper
pins, then this module can be located anywhere in the rack. Blank Modules can be located anywhere in
the rack or can be inserted between other modules. If the first module in the rack is a blank, then P/N
1315 Blank Module must be utilized only in that location to indicate to the Fault Module the “remove
module” supervision loop is complete. On the Blank Module P/N 1785, there is no jumper and this mod-
ule is restricted to any rack slots with the exception of the first module.
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Figure 11. Module front views and their respective label numbers as follows:
800 - (module number) - (label number)
Figure 12. Abort Module front view Figure 13. Abort Module front view
Model 800-1436 Model 800-1437
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4. INPUT MODULE (800-1440)
The Input Module is the primary module that monitors detector head dry relay contacts to trip the sys-
tem. This 3 channel module can be duplicated in the system to add more points of fire annunciation as
required. To maintain a fully automatic operation, the system is designed to be utilized for non-latching
detectors; although, latching detectors may be utilized in some special applications.
When activated by a detector, the fire LED will turn on as long as the detector remains in alarm. When
the alarm clears, the LED will blink to indicate there has been a relay contact closure on the respective
input. The module can be reset when all alarms on this module have been cleared.
The activation of the Input Module automatically initiates the Alarm, Relay and Release Module. Refer to
the specific modules to determine their operation during an alarm condition.
4.1 VOTING
Refer to the DIP switch selections to set the Input Module voting parameters. Refer to section 4.10 for
their operations. Voting channels must be actuated by the detectors simultaneously to trip the Input
Module if voting is utilized.
Voting can be utilized where the absolute confirmation of a fire exists, reducing false alarms. Allestec
does not recommend any standard switch configurations, since installations vary with design procedures
and environmental conditions.
CAUTION: THE INTRODUCTION OF VOTING AND / OR TIME DELAYS WILL SLOW THE FIRE
DETECTION TIME.
If a nuisance alarm trips one detector for no apparent reason, the Input Module fire LED will trip and
latch on that particular channel. The resulting blinking LED indicates that there is a potential for the Input
Module fire output to trip because one channel registered a valid input condition, even though it may
have been an unwanted signal. Observe this type of warning signs to alleviate any possible false
alarms.
R3, R4, and R5 are 4 turn potentiometers utilized to adjust the amount of time lapse after the detector
alarm relay closes. One clockwise revolution of the POTs equals approximately 4 seconds, and each
POT may be adjusted independently of each other. The maximum time of each POT is approximately 12
seconds.
If, for an example, R3 POT is adjusted for 5 seconds, and the module is not voting, the Input Module fire
alarm output signal will trip 5 seconds after the detector head fire relay trips. If the detector head relay
opens before the 5 seconds expire, the timer automatically resets and waits for another continuous 5
second detector head relay closure.
NOTE: If the voting switch is selected to trip when any detector alarms, the Input Module fire output
signal will trip on the POT that is adjusted to the shorter delay. If the voting switches are voting
between detectors, the Input Module fire output signal will trip on the POT that is adjusted to
the longer delay. Test the arrangement prior to entering into service.
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NOTE: If time delay is correct for the Input Module, the time must be considered when setting the time
in the Release Module. The time from the Input Module will be added to the time of the Re-
lease Module.
NOTE: The Input Module will not reset if this fuse is open.
CAUTION: DEPRESSING THE DETECTOR SWITCH, SW3, WILL ALARM THE DETEC-
TORS CONNECTED TO THE INPUT MODULE. PROPER DISABLING OF THE
SYSTEM MUST BE PROVIDED OR A DISCHARGE RELEASE WILL OCCUR.
Based on the detector requirements for the test feature, refer to the jumper location below:
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4.10 INPUT MODULE DIP SWITCH SELECTIONS
Switch poles must be in the ON position for these functions to operate properly. Only ONE switch can
be on in any selected bracket below.
J2 Remove jumper to interrupt 24VDC to detector head when RESET switch is depressed. Use this
option to reset detectors that require power interrupt for resetting.
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Figure 14. Input Module P/N 1440 component view
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5. INPUT VOTE MODULE (800-1530)
The model 800-1530 Input Module is an initiating module that monitors detector head dry relay contacts
to trip the system in the event of a fire. This two-input module can be duplicated in the system to add
more points of fire annunciation as required. The module can vote between other model 1530 modules
in the rack, where the combination of up to 4 detectors are required to satisfy the confirmed alarm condi-
tion. The model 1530 Input Module can be located in the same rack with the model 1440 three channel
Input Module while isolating voting between modules. To maintain a fully automatic operation, the sys-
tem is designed to be utilized for non-latching detectors; although, latching detectors may be utilized in
some applications.
When activated by a detector, the fire LED will turn on as long as the detector remains in alarm. When
the alarm clears, the LED will blink to indicate the detector relay has opened on the respective input.
The module can be reset when all alarms on this module have been cleared.
The activation of the Input Module automatically initiates the Alarm, Relay and Release Module, if util-
ized. Refer to the specific modules to determine their operation during an alarm condition.
CAUTION: THE INTRODUCTION OF VOTING AND / OR TIME DELAYS WILL SLOW DOWN THE
FIRE DETECTION RESPONSE.
The Input Module can incorporate an adjustable time delay for use with detector heads that require filter-
ing nuisance alarm signals before it is deemed a valid alarm. Spurious IR or UV radiation, such as light-
ning, can trigger the detector head fire relay for a short period of time that could result in a false alarm.
The time delay will allow the Input Module to be adjusted to ignore these unwanted signals.
R3 and R4 (TD1 and TD2 respectively) are 4-turn potentiometers utilized to adjust the amount of lapse
time after the detector head fire relay closes. One clockwise revolution of the POTs equals approxi-
mately 4 seconds, and each POT may be adjusted independently of each other. The maximum time of
each POT is approximately 12 seconds.
For an example, if TD1 POT is adjusted for 5 seconds, and the module is not voting, the Input Module
fire alarm output signal will trip 5 seconds after the detector head fire relay trips. If the detector head re-
lay opens before the 5 seconds expire, the timer automatically resets and waits for another continuous 5
second detector fire relay closure.
NOTE: If the voting switch is selected to trip when any detector alarms, the Input Module fire output
signal will trip on the POT that is adjusted to the shorter delay. If the voting modules are voting
the detectors, the Input Module fire output signal will trip on the POT that is adjusted to the
longer delay. Test the arrangement prior to entering into service.
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NOTE: If time delay is required for the Input Module, the time must be considered when setting the
time in the Release Module. The time from the Input Module will be added to the time of the
Release Module. This delay includes both models of the 1443D and 2800 Cycle Mist Release
Module.
5.3 VOTING
Voting can be utilized to validate the confirmation of a fire, thereby reducing false alarms. Allestec does
not recommend any default configurations, since installations vary with design procedures and environ-
mental conditions.
If a nuisance alarm trips one detector for no apparent reason, the Input Module fire LED will trip and
latch on that particular channel. The resulting blinking LED indicates that there is a potential for the Input
Module fire output to trip, because one channel registered a valid input condition, even though it may
have been an unwanted signal. Observe this type of warning sign to alleviate any possible false alarms.
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Figure 15. Input Vote Module P/N 1530 component view
NOTE: The Input Module will not reset if this fuse is open.
J1 Removal of this jumper will allow the 24VDC to the detector head to be interrupted when the RESET
switch is depressed. Use this option to reset detectors that require power interrupt for resetting. Lo-
cate this jumper in the "spare" holder if not used.
DO NOT USE THIS FEATURE IF THE MODULE IS POWERING THE DETECTOR FROM TB1-10.
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5.10 MASTER INPUT VOTE MODULE DIP SWITCH SELECTIONS
FIRST ALARM: When the Input Vote Module receives its first alarm via the rear TB1 input terminals, the
following functions occur, regardless of DIP switch settings: Alarm Module channel 1(Bell) and channel 3
(Strobe) activates {providing the module is utilized}.
VOTED ALARM: When the Input Vote Module satisfies a voting requirement, the following functions si-
multaneously occur.
1. Fire local relay changes state – based on SW1.
2. Alarm Module channel 2 (Horn) activates – based on SW2.
3. Release Module activates – based on SW2 {providing the module is utilized}.
SW2 All four voting switches OFF disables the voting logic.
SW2-1 Any Input Vote Module alarm activates voting logic.
SW2-2 Any two Input Vote Module alarms activates voting logic.
SW2-3 Any three Input Vote Module alarms activates voting logic.
SW2-4 Any four or more Input Vote Module alarms activates voting logic.
NOTE: Allow only one switch to be in the “ON” position for SW2.
A) The alarm is visually identified on the front panel with the Fire LED that corresponds to the alarm
input.
B) Its local fire relay will activate if SW1 is selected for the 1st alarm.
C) The Alarm Module channel 1 (Bell) circuit is activated.
D) The Alarm Module channel 3 (Strobe) circuit is activated.
2. Voted alarm is satisfied as established by the Master Vote Module, SW2 switch.
A) Its local fire relay will activate if SW1 is selected for the voted alarm.
B) The Alarm module channel 2 (Horn) circuit is activated.
C) The release module enters its pre-discharge mode and commences timing down.
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NOTE: The Release Module can be inhibited prior to satisfying the vote logic by placing it into the
inhibited mode.
NOTE: If the 1st alarm is configured to be the voted alarm, all sequences in paragraphs one and two
occur simultaneously.
TB2#
1 PANEL +24VDC INPUT
2 PANEL –24VDC NEGATIVE
3 MODULE REMOTE RESET Momentary +24VDC to reset module
800-1530-
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6. MANUAL PULL MODULE (800-1441)
Upon closure of a Manual Pull station, the Manual Pull Module FIRE LED will illuminate and the audio
and visual appliances will operate through the Alarm Module, if utilized. The Release Module will be initi-
ated at this time. The Manual Pull signal is selective at the Release Module program menu to pass
through the time delay or bypass the time delay. The option to activate one or two tanks from the Man-
ual Pull is also selective at the Release Module program. Refer to Figure 16 for the Manual Pull DIP
switch locations.
6.1 INHIBIT
This panel switch allows the user to test the audio and visual appliances while disabling the Main and
Reserve tanks of the Release Module. All alarms must be clear and panel in normal operating mode to
invoke the inhibit function. To activate the inhibit function, depress the inhibit switch on the front panel of
the Manual Pull Module. The green power LED will blink to indicate the inhibit mode is valid. The Fault
Module will activate until the inhibit mode clears. The Manual Pull can now be tested without affecting
the releasing mechanism. The Manual Pull station must be reset before the Manual Pull Module can be
reset.
CAUTION: THE MANUAL PULL INHIBIT SWITCH INHIBITS ONLY THE MANUAL PULL. THE IN-
HIBIT FUNCTION LOCATED IN THE RELEASE MODULE DISABLES BOTH MANUAL
PULL AND RELEASE MODULE FROM ACTIVATING THE RELEASE SOLENOIDS.
NOTE: Refer to the Release Module switch selections to allow the Manual Pull to release one or
two tanks.
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Figure 16. Manual Pull Module P/N 1441 component view
Switch poles must be in the ON position for these functions to operate properly.
Page 34
7. ALARM MODULE (800-1442)
This module is activated by the initiating modules: Gas, Input, or the Manual Pull Module. Once tripped,
the configured output of this module will sound a bell / horn and turn on a strobe. The bell / horn can be
silenced by depressing the silence switch on the front panel. Any incoming alarms after the Alarm Mod-
ule has been silenced will reactivate the audible appliances. When the bell / horn is silenced, the LED
referencing that particular audible appliance will blink to indicate there is an audible device that has been
silenced. The strobe remains on during an alarm and during the silencing of the audible appliances.
Each of the three appliances are fused for 2A of current. All alarms must clear on the initiating modules
before the strobe can be reset. Refer to Figure 17 for the DIP switch locations.
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Figure 17. Alarm Module P/N 1442 component view
Page 36
7.7 PANEL TERMINAL STRIP DESIGNATIONS
Page 37
8. RELEASE MODULE (800-1443D)
The Release Module is activated by the Input or the Manual Pull Module and is designed to support a
MAIN and RESERVE solenoid operated suppression tank. This module can also be utilized in a single
tank mode. Depending on the occurring events, the module will respond to its pre-selected program in-
struction as defined by the user.
NOTE: The 800-1443D release module is functionally the same as the previous model 800-1443 release
module and can be swapped from the slot. The 800-1443D inhibit feature has changed. The TB1 termi-
nals are also identical except for the addition of a discharge relay output.
Wire the solenoids to the Release Module as shown in Figure 5. This module may be utilized in a 24
VDC or a single 12 VDC series solenoid mode. Verify that all connections are secure and there is no
binding in the field wiring. It is imperative that the inductive kick-back diodes are in place as indi-
cated in Figure 5.
When the Release Module enters into an alarm mode, the display will indicate the time remaining for the
MAIN and RESERVE solenoid to energize while the LED indicator will indicate the seconds or minutes
remaining. The counting will continue unless the module is interrupted by either the alarm signal deacti-
vating from the Input Module (fire extinguished) or an abort function is induced. Once the time delay has
expired, the MAIN or RESERVE blinking LED will glow steady indicating an energized solenoid for that
specific tank.
The user enters the program mode and sets parameters for the MAIN and RESERVE solenoid timing
sequence. A pre-discharge time for the MAIN solenoid can be set from .1 to 9.9 minutes. In addition to
the MAIN solenoid, a RESERVE timing sequence can also be set from .2 to 9.9 minutes AFTER the
MAIN solenoid time has expired.
An inhibit (disable) feature allows the initiating and appliance circuits to be tested without activating the
solenoid release circuit(s). The inhibit mode cannot be exited unless all alarms are cleared. When the
Release Module is entered into the inhibit mode, the Input or Manual Pull Module can be activated into
alarm for testing purposes without activating the releasing mechanism.
CAUTION: LOCATING THE MANUAL PULL MODULE INTO INHIBIT DOES NOT INHIBIT THE RE-
LEASE MODULE, ONLY THE MANUAL PULL.
During an Input Module alarm, a Manual Pull activation will override the Release Module current timing
countdown sequence and will discharge the tank in which the time sequence resides, based upon the
instant or timed release selection.
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The pressure switch is optional and can be disabled if a second extinguishing tank is not utilized. The
pressure switch normally closed contact input allows the Release Module to automatically trip the
RESERVE solenoid should the MAIN solenoid malfunction. Once the pressure switch has opened, it
must remain in that position for at least the first 7 seconds of the RESERVE countdown.
1. Enter the program mode by depressing the two front panel switches in this sequence. Depress the
Set/Reset button and hold it down. While holding the button down, depress the Step button, then
release both of them simultaneously.
2. IH – INHIBIT - The first instruction is the inhibit mode. This is the only menu in the program that the
user can enter and exit from. The panel LED’s will flash and the audible alarm will beep to identify
that the module is inhibited. A fault signal will automatically be sent to the fault module to identify
that the Release Module is inhibited. The module will remain in fault during the duration of the pro-
gramming sequence.
3. PP – PROGRAM PRIMARY (MAIN SOLENOID) – This mode establishes the amount of time lapse
from the confirmed activation of an Input or Manual Pull Module to the MAIN solenoid activation.
Depress the Step switch until the PP mode is attained. The display will indicate tenths of minutes
from .1 minutes (6 seconds) to 9.9 minutes. Increment to the correct time by depressing the Set
switch. During an alarm, the display will indicate true seconds for time from 60 to 0 seconds.
4. Pr – PROGRAM (RESERVE SOLENOID) – This mode establishes the amount of time lapse from
the confirmed activation of an Input or Manual Pull Module to the RESERVE solenoid activation.
Depress the Step switch until the Pr mode is attained. The display will indicate tenths of minutes
from .2 minutes (12 seconds) to 9.9 minutes. Increment to the correct time by depressing the Set
switch. During an alarm, the display will indicate true seconds for time from 60 to 0 seconds. NOTE:
The time attained for the reserve tank is ADDED to the main solenoid time.
5. PL(0) — MANUAL PULL instant – Depress the Set switch until a zero (0) appears in the display.
The Manual Pull will trip the main solenoid instantly.
6. PL(1) — Manual Pull timed delay – Depress the Set switch until a one (1) appears in the display.
The Manual Pull release will be delayed as programmed by the timing sequence in step 3.
7. AE(0) Abort function not utilized.
8. AE(1) — Abort type 1 – During a MAIN or RESERVE pre-discharge initiated by an Input Module,
pushing the abort switch will automatically add 30 seconds to the timing sequence. This procedure
is allowed only once. If the Release Module countdown has temporarily ceased (Input Module not
acknowledging a fire), then the abort is activated, the 30 seconds will be added to the existing time
delay if there is post ignition fire when the timing continues. NOTE: The 30 seconds that are added
will be indicated as seconds as long as the countdown time is 60 seconds or below.
9. AE(2) - Abort type 2 - During a MAIN or RESERVE pre-discharge initiated by an Input Module, if
the abort switch is pushed and released before either timer expires, the timing sequence is not
modified or interrupted. Pushing the abort switch, then holding it through the end of either timing
cycle, then releasing the switch will trip the MAIN or RESERVE solenoid. The solenoid which trips is
dependent on which of the timing modes, MAIN or RESERVE, the module is executing. During the
time the abort switch is depressed, the current discharge LED will blink at a faster rate when the
display descends to 1 second.
10. rE(0) The RESERVE solenoid circuit is disabled.
11. rE(1) The RESERVE solenoid circuit is enabled. This mode requires an inline pressure switch in the
MAIN release discharge circuit as indicated in Figure 5.
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CAUTION: A MANUAL PULL ALARM WILL OVERRIDE AN ABORT FUNCTION AND
COMMIT TO THE INSTANT OR DELAYED ACTION AS INDICATED IN THE
CONFIGURATION MENU.
A. CAUSE
The Release Module is activated, the MAIN solenoid timing starts, but the fire is manually extinguished
prior to the MAIN cycle time expiring.
B. EFFECT
The display will start counting down from its pre-selected time until the fire signal expires. The display
will then hold (memory feature) the final time remaining until the module is reset. Should the alarm con-
tinue, the timing will commence where it left off. The audible alarm remains beeping until the module is
reset.
C. CAUSE
The Release Module is activated, the MAIN solenoid timing starts, the fire remains until the count-
down expires and the MAIN solenoid trips, thereby extinguishing the fire. The pressure switch changes
state within 7 seconds.
D. EFFECT
The MAIN agent release is sufficient enough to extinguish the fire and the RESERVE solenoid is
never activated. The audible alarm remains beeping until the module is reset.
E. CAUSE
The Release Module is activated, the MAIN circuit timing starts and counts down to zero, the pressure
switch changes state within 7 seconds. The fire is of sufficient magnitude to continue after the MAIN so-
lenoid trips.
F. EFFECT
The display commences its second timing sequence on the RESERVE solenoid and upon the expiration
of the timing, the RESERVE solenoid trips. The audible alarm remains beeping until the module is reset.
G. CAUSE
The Release Module is activated, the MAIN circuit timing starts, the pressure switch does not change
state within 7 seconds.
H. EFFECT
The RESERVE LED and solenoid will automatically turn on, provided the RESERVE solenoid is en-
abled. The module display will remain at 00 until reset.
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8.5 MANUAL PULL ALARM DURING PRE-DISCHARGE TIMING – Instant mode PL(1)
When there is an Input Module alarm and the Release Module is in a pre-discharge state, if the manual
pull is activated, the timing sequence will cease and the current timing window (MAIN or RESERVE)
solenoid will activate immediately. If the manual pull occurs in the MAIN countdown, the RESERVE tank
will discharge within 7 seconds if the pressure switch malfunctions. If the RESERVE solenoid is dis-
abled, then a manual pull in the MAIN countdown will activate only the MAIN solenoid.
NOTE: A P7 appears in the window during the pressure switch transition time.
NOTE: A manual pull alarm is committed to its pre-programmed routine once it is activated, and
cannot be reset.
8.6 MANUAL PULL ALARM DURING PRE-DISCHARGE TIMING – Time delay mode PL(1)
If the manual pull is activated during a pre-discharge alarm, the countdown is then committed to section
8.7, C & D.
A. INSTANT RELEASE with RESERVE solenoid disabled – PL(0) rE(0) The MAIN solenoid energizes
on alarm and there is no other action.
B. INSTANT RELEASE with reserve tank enabled – PL(0) rE(1) The MAIN solenoid energizes on alarm.
If the pressure switch malfunctions, the RESERVE solenoid will automatically energize within 7 sec-
onds. If the pressure switch changes state, the RESERVE tank is retained.
C. TIMED RELEASE with reserve disabled – PL(1) rE(0) After the MAIN time has expired, the MAIN
solenoid will energize and end of action.
D. TIMED RELEASE with reserve enabled – PL(1) rE(1) After the MAIN timing has expired, the MAIN
solenoid energizes on alarm. If the pressure switch changes state, the RESERVE solenoid will trip at
the end of the RESERVE timing sequence. If the pressure switch malfunctions, the RESERVE sole-
noid will automatically discharge within 7 seconds.
CAUTION: THE RELEASE MODULE INHIBIT WILL ALSO DISABLE THE MANUAL PULL
MODULE.
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8.10 FAULTS
All fault actions are latching and must be addressed immediately. If a fault condition occurs, the Fault
Module will alarm immediately and can be silenced. The Release Module will not operate properly under
a fault condition. The display window displays the following “FX” symbol to indicate the type of fault.
Page 42
8.12 PANEL TERMINAL STRIP DESIGNATIONS
Page 43
9. WATER MIST (CYCLE) RELEASE MODULE (800-2800)
9.1 APPLICATIONS
The model 800-2800 Cycled Release Module (CRM) is utilized in applications that accommodate a wa-
ter mist system, conforming to the NFPA 750 standard. This module can be programmed to cycle the
mist delivery to obtain maximum effectiveness in fire suppression while utilizing a minimal amount of wa-
ter. Applications include industrial electrical equipment, flammable liquid pumping and storage facilities,
co-generation power plants, oil refineries, etc.
9.2 OPERATION
The CRM is designed to operate in fire systems that utilize non-latching detectors, although, some instal-
lations can accommodate latching. The CRM monitors the detector’s fire relay status and determines if a
continued mist application is necessary, should the fire persist.
Upon receiving a confirmed fire signal from the Input or Manual Pull Module, the pre-discharge timing
sequence will commence until its time expires. During this time, the Alarm Module will be initiated while
the CRM counts down to initiate its first discharge cycle. The mist solenoid will cycle on and off in a tim-
ing sequence pre-programmed by the installer. There is a provision to stipulate the quantity of complete
cycles. After the pre-programmed cycle counts have been satisfied, the module will enter into a pause
mode, while counting down in tenths of minutes. After the expiration of the pause mode, the CRM will
suspend its timing sequences if the fire has been extinguished. If the fire persists, the module will enter
into its second timing sequence. The number of timing sequences is determined by the capacity of the
water supply. Select a timing sequence that will deplete the water supply should the fire persist.
9.3 INSTALLATION
Refer to the field wire diagram on Figure 6 to correctly wire the CRM to the solenoid. Note that the induc-
tive kickback diode is required at the location of the solenoid. This diode suppresses the reverse high
voltage spike created when the magnetic field around the energized solenoid collapses upon the re-
moval of power. Verify this diode is correctly located (reverse polarized) prior to applying power.
9.5 POWER UP
Upon application of power, the CRM will display PU (Power-Up) for 5 seconds, while disabling the output
relays, then beep and go into the real time display, 00. The 00 will remain in the seven segment displays
until an event occurs or the module enters into program mode.
9.6 PROGRAMMING
1. Enter the program mode by depressing the two front panel switches in this sequence. Depress the
Set/Reset button and hold it down. While holding the button down, depress the Step button, then
release both of them simultaneously.
2. INHIBIT - The module first enters into the inhibit mode, displaying IH (Inhibit). This is the only menu
in the program the user can enter and exit from. The panel LED’s will flash and the audible alarm will
beep to identify that the module is inhibited. A fault signal will automatically be sent to the fault mod-
ule to identify that the CRM is inhibited. The CRM will remain in fault during the duration of the pro-
gramming sequence.
3. PRE-DISCHARGE - Depress the Step button to the next mode to enter pre-discharge timing. De-
press the set button until the correct pre-discharge time is attained. Increment the Set button to set
the correct pre-discharge time (0-99 seconds). The pre-discharge LED will remain on during this
mode. This mode is primarily utilized for personnel evacuation prior to initiating the mist discharge. If
pre-discharge is not required, set the display to 00 seconds.
4. MIST ON - Step to the next function to enter cycle on time by incrementing the Set button until the
correct time is selected. The allowable timeframe for this mode is from 5 to 99 seconds. The Mist
Cycle ON LED will remain on during this mode.
Page 44
5. MIST OFF - Step to the next function to enter cycle off time by incrementing the Set button until the
correct time is selected. The allowable timeframe for this mode is from 5 to 99 seconds. The Mist
cycle OFF LED will remain on during this mode.
6. CYCLE COUNT - Step to the next function to enter cycle number (how many times the on-off se-
quence will occur). Increment the set button until the correct number of cycles are attained, 1 to 9.
The display will alternate between the cycle counts and “CC” to identity the program mode. Program
only enough cycles to satisfy the retained water capacity.
7. PAUSE MODE - Step to the next function and enter the amount of pause time the module surveys
for fire presence. Depress the Set button to set the correct time, in tenths of minutes. Example: 30
seconds is indicated as .5 (minutes). The pause LED will remain on during this mode. Pause timing
may be set from .1 to 9.9 minutes.
8. SAVING PROGRAM DATA - Step to the final function, inhibit, and then exit the program as it was
entered, as described in paragraph one. This mode is the only menu location that allows the user to
exit the program, since no data can be altered.
CAUTION: THE INHIBIT MODE DISABLES THE INPUT MODULE AND THE MANUAL
PULL MODULE.
NOTE: All alarms on the panel must be cleared or the inhibit mode cannot be exited.
NOTE: All Input Module alarm(s) must be cleared for the CRM to reset. The manual pull station
(s) and the Manual Pull Module must also be reset.
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9.12 DETAIL OF CYCLE EVENTS
During the mist and pause mode cycles, the display will be interrupted for 2 seconds, at 15-second inter-
vals, to identify the current cycle number. This cycle count display will not affect the timing. The audible
alarm will beep at a faster rate at this 2 second interval.
9.13 PRE-DISCHARGE
The pre-discharge mode will commence the first timing sequence during an alarm. There will be no mist
discharge during this time.
A. If the fire input signal is gone (fire is extinguished) after the pause time expires, the module dis-
play will alternate in two-second intervals: FE, for fire extinguished, and the total amount of cy-
cles it took for the fire to be extinguished. The module can now be reset.
B. If the fire remains after the pause mode, the module will remain cycling until 9 cycles have com-
pleted. The cycling will continue whether or not the water is still available. When the ninth cycle
is attained, the module will remain there, cycling, until the fire alarm has been cleared and the
module is reset.
1. An open line within the solenoid circuit will induce a latching fault. Should an open circuit occur dur-
ing a cycle discharge, the fault will appear after the module completes the cycling.
2. Depressing the remote reset switch when there is no alarm activity will initiate a non-latching fault.
3. Malfunction fault - Should a malfunction occur and the power fails on the CRM, the Fault Module
will indicate a system fault. Locate the problem immediately to restore the panel back to its
original operating condition.
Page 46
9.20 INTERNAL CONTROL (option)
A connection located at TB1-9 is reserved for an external device to interrogate the cycle function of the
CRM. Contact Allestec for more details.
Page 47
10. RELAY MODULE (800-1760)
The Relay Module is an alternative method utilized to extend the availability of functions from various
other modules within the panel. There are three user relays accessible from the rear of the panel and
can be configured from the module. The relays are form C (SPDT) and are rated at 5 amps, 30 VDC or
250 VAC. An audible alarm is provided that has a chirping sound to announce a relay has changed
state. The audible alarm can be silenced from the Relay Module front panel. Refer to Figure 6 to identify
the terminal strip connections.
Auxiliary Alarm
The auxiliary alarm relay, connections located at TB1-4,5,6, can be configured to be tripped from the
Input, Input Vote, Manual Pull or Gas Module. This auxiliary relay can also be configured to trip on the
Release Module pre-discharge timing sequence. The auxiliary relay can be configured to select none or
all of these alarm choices.
Fault Alarm
The fault alarm relay, connections located at TB1-7,8,9, will trip anytime there is a system fault.
NOTE: Once a system event has occurred (General, Auxiliary or Fault Alarm), the specific alarm relay
and audible alarm for that event has been committed. Reoccurring alarms for that alarm event channel
will not announce unless the module has been reset.
SYSTEM NOTE: The initiating modules (Input, Input Vote, Manual Pull, Gas Modules) must first be con-
figured at their DIP switch locations to properly communicate to the Relay Module.
Page 48
10.3 RELAY MODULE DIP SWITCH SELECTIONS (continued)
NOTE: Manual Pull Alarm - If the Manual Pull is in the inhibit mode, the module will still issue a
GENERAL ALARM signal to the Relay Module. However, the alarm signal will be inhibited at location
SW2-3 Auxiliary Relay selection.
Page 49
11. FAULT MODULE (800-1444)
A fault in the system will be indicated on the module where the fault originates and will transfer the sig-
nal to the Fault Module. The Fault Module will indicate the fault as a system fault and will sound the au-
dible alarm. The audible alarm can then be silenced with the front panel reset switch. When the fault
problem has been resolved, the system fault LED will then turn off. Refer to section 11.5 for DIP switch
selections and Figure 21 for their locations.
Page 50
Figure 21. Fault Module P/N 1444 component view
Switch poles must be in the designated position for these functions to operate properly.
Page 51
12. ABORT MODULE (800-1436/1437)
Upon activation of the Abort Module, the Module will start to count down from its pre-selected time and
stop at zero, unless reset. If both displays are utilized, they will simultaneously start at their pre-selected
time. Depending on the style of abort selected from the panel, the timing sequence can be interrupted or
started over. Refer to the Release Module sections for more detailed information.
Page 52
12.9 TIME COUNTDOWN SETTINGS
Primary Display Board (Figure 22): For systems utilizing a main tank circuit without a reserve tank. The
timer can be set to a maximum of 99 seconds by adjusting SW1 and SW2. SW1 on the circuit board cor-
responds to the MOST SIGNIFICANT DIGIT and SW2 corresponds to the LEAST SIGNIFICANT DIGIT.
Adjust the timer to the same time setting as the panel connected to the Abort Module. Example: If SW1
is set at 2 and SW2 is set at 5, the timing sequence will commence at 25 seconds and count down to
zero, unless aborted.
Secondary Display Board - optional (Figure 23): This board is utilized in systems that include a reserve
extinguishing tank connected to the panel. The secondary display board clock signal is connected to the
primary board, therefore syncing off the same clock circuit. The option display board can be set at a dif-
ferent time starting sequence independent of the primary board. SW1 located on the secondary display
board is the MOST SIGNIFICANT DIGIT and SW2 is the LEAST SIGNIFICANT DIGIT.
Page 53
13. GAS MODULE REV 5 (800-1457-XXXX)
The NT420 module monitors industrial standard gas detectors 4-20mA output signals. This compact mi-
croprocessor module displays a linear representation of the input current as a percent of LFL, PPM or %
oxygen. Based on the required input style of gas, refer to the configuration chart in Figure 26. There are
three set points that can be set in the program routine for each of the 5 configurations. If a set point is
attained during operation, the designated panel alarm LED will illuminate and the associated relay will
change state. The operator enters a program mode to establish the operation parameters of the module.
Any time the module is in the program mode, the output relays are disabled and the fault circuit is acti-
vated. Once data is entered into memory and saved, it will remain until changed, even if power is re-
moved from the module.
The optional 4-20mA recorder output located on the rear terminal strip is a DC current representation of
the input. This output can be connected to a recorder or another style of measuring device.
Each module has an external reset input located on the rear terminal strip. A momentary +24V will reset
the module if its program flag was set to latch.
The rack housing can accommodate up to 16 modules and the user has the option of including other
Allestec modules to further enhance the system's operational performance. Other modules that can be
added to the system are typically the Alarm Module, for example.
13.1 FIELD WIRE INSTALLATION
CAUTION: OBSERVE REGULATIONS AND MAKE SURE THE AREA IS DECLASSIFIED FOR
NON-HAZARDOUS OPERATION BEFORE INSTALLING ANY EQUIPMENT IN
HAZARDOUS LOCATIONS.
Connect the gas sensors and any field devices to the rear motherboard plane as shown in Figure 5. Af-
ter the wires have been connected, route the wires along the rear plane of the panel to their destina-
tions.
Color coded wires are recommended for ease of identification for installation of the system. The use of
stranded copper wire is recommended in lieu of solid strand wire to eliminate the possibility of breaks
and loosening of connections. For signaling wires, wire sizes smaller than 20 AWG are not recom-
mended, and there will be no more than a total of 5 ohms resistance per each single conductor. For
power connections, wire sizes smaller than 16 AWG are not recommended, and there will be no more
than 3 ohms total resistance per each power conductor. Refer to Figure 5 for proper field wire connec-
tions.
CAUTION: SHIELD WIRES MAY BE REQUIRED FOR SENSOR INPUT IF THE ENVIRONMENT IS
HEAVILY ENCOMPASSED WITH RF ENERGY.
Power and ground wire gauge must be of sufficient size to ensure that the voltage drop at the maximum
current draw of the sensor will not reduce operating voltage to less than the manufacture’s recom-
mended operating rating at the sensor.
NOTE: Increase the power supply power output if additional devices are connected to the alarm or fault
output relays.
Observe conditions where the rise of ambient temperature requires power supply derating. Read the
power supply specification sheet for more information. Although some applications utilize an Earth
grounded power supply, Allestec recommends the power supply be floating.
When the rear panel has been wired, verify all connections leading to and from rear panel assembly.
Attach the protective acrylic insulator on the standoffs and secure the mounting screws.
Page 54
13.2 FIRST MODULE IDENTIFICATION
Dip switch SW1-7 must be in the ON position, if this is the first module located on the left hand side of
rack assembly, viewed from the front. Refer to Figure 25.
NOTE: Fault circuit is set for latching - if the display descends to the under range and back to a normal
operating point, the fault circuit will latch; however, any incoming alarms will still activate the
module. Resetting the module will induce the time delay countdown, since there was a fault.
Page 55
13.9 MODULE FRONT VIEWS Label part numbers:
. P/N 1454 P/N 1489 P/N 1490
Page 56
13.10 PROGRAM FAMILIARITY
Prior to entering the program mode, become familiar with the abbreviated text below. The abbreviated
text is sequentially stepped through the numeric display to program the module. The bold letters dis-
played to the left are visible on the module numeric LED's. The program instruction set is determined by
the location of the J7 and J8 jumper as indicated in Figure 25.
Page 57
Model 800-1457-XXXX Gas Module Configurations (Release 5)
Type 1 Type 2 Type 3 Type 4 Type 5
Application Methane H2S H2S H2S Oxygen
Startup indication C1 C2 C3 C4 C5
Scale 0 to 100% 0 to 100 ppm 0 to 50 ppm 0 to 25 ppm 0 to 25%
Page 58
Model Number 800-1457-1454 800-1457-1489 800-1457-1489 800-1457-1489 800-1457-1490
Range -9% to 100% -9 ppm to 100 ppm -4 ppm to 50 ppm -2 ppm to 25 ppm -2% to 25%
Range in mA 2.5 mA to 20 mA 2.5 mA to 20 mA 2.5 mA to 20 mA 2.5 mA to 20 mA 2.5 mA to 20 mA
Calibration level 50% 50 ppm 25 ppm 10 ppm 21%
Input mA at Span Calibration level 12.00 mA 12.00 mA 12.00 mA 10.40 mA 17.44 mA
Input V at Span Calibration level 3.000 V 3.000 V 3.000 V 2.600 V 4.360 V
Allowed range for Zero Cal. 3.5mA to 4.5 mA 3.5mA to 4.5 mA 3.5mA to 4.5 mA 3.5mA to 4.5 mA 3.5mA to 4.5 mA
Allowed range for Span Cal. 10.8 mA to 13.2 mA 10.8 mA to 13.2 mA 10.8 mA to 13.2 mA 9.36 mA to 11.44 mA 15.7 mA to 19.18 mA
Default HiHi alarm 65% rising 20 ppm rising 20 ppm rising 20 ppm rising
Default Hi alarm 55% rising 15 ppm rising 15 ppm rising 15 ppm rising 24% rising
Default Lo alarm 10% rising 5 ppm rising 5 ppm rising 5 ppm rising 19% falling
Default L2 alarm 17% falling
Default HiHi latch flag ON OFF OFF OFF OFF
J7 J7 J7 J7 J7
J8 J8 J8 J8 J8
13.11 CONFIGURATION TABLE
This chart gives details of what the NT420 module expects as input currents and calibration procedures
for gas concentrations. Determine which application is required, and set the jumpers as indicated in Fig-
ure 26.
NOTE: If the operator changes a jumper configuration and powers up, the module will come up in the
AC mode. Exit the program at this point if the module is required to be in its monitoring mode.
To enter the program mode, depress and hold the SET/RESET switch, now depress the STEP switch.
Release both switches simultaneously. PG or program, will be displayed as long as both switches are
depressed. The module is now currently in the program mode. Each mode can be sequentially stepped
through by depressing the STEP switch. During the display of the selected mode, the display will alter-
nate between the mode and the current selected value. This alternating "mode --> value" display en-
ables the operator to identify the function currently active in the program mode, while at the same time
selecting the proper values. After the last mode is presented, exit the program in the same sequence as
described above at the AC location.
CAUTION: THE VALUES ARE ALWAYS "LIVE" WHILE IN THE PROGRAM MODE AND THE OP-
ERATOR MUST NOT PRESS THE SET SWITCH UNLESS TO CHANGE THE VALUE.
THE AC MODE READING IS ONLY CHANGED BY THE LOOP CURRENT CONNECTED
TO THE MODULE.
NOTE: To cancel the countdown, depress the SET/RESET SWITCH once the display descends to 25.
13.16 DEVIATIONS
Should a module require a customer requested deviation, the module will be stamped with the letters
DEV followed by a deviation number. Allestec supplies the corresponding S/N data sheet to identify the
type of deviation.
Page 59
13.17 PROGRAMMING FOR THE C1 COMBUSTIBLE GAS CONFIGURATION C1
13.18 AC MODE
Enter the program mode and observe that the first mode is the AC Actual Current mode. This mode is
utilized for entering and exiting the program menu. This mode is helpful for diagnosing the 4-20mA loop
current because it is an actual current meter. The amount of current that can be displayed is from 00 to
25mA in any of the 5 configurations. The actual real time loop current will display even if the loop current
is changing. The calibration or set points of the module have no influence on the AC reading.
NOTE: During normal display operation, the fault annunciation does not inhibit the display and alarm
relays from operating.
Page 60
C1
The following procedures describe two different styles of routine calibrations. The standard calibration
requires an operator at the sensor to apply the gas and another operator at the module to perform cali-
bration. Remote calibration requires that the module be first calibrated to 4-20mA using a known stan-
dard. This calibration allows one operator to apply gas to the sensor and at the same time adjust the
remote calibrator at the sensor. If the calibration is difficult to obtain, enter the menu at the AC location
to verify that the loop current is close to the 4mA range @ 0% LFL. For standard routine calibration, re-
fer to the following procedure. For routine calibration when a remote calibration module is utilized, refer
to section 13.28.
NOTE: It is advisable, as described by the gas sensor manufacturers, to let the gas sensor stabilize
for some time after applying power. This stabilization period will keep the sensor loop current
from drifting after the calibration has been established. This period may take as long as 24
hours.
NOTE: Standard gas calibration kits are 50% of full scale. Gas concentrations that can accommodate
25% and 10% scales are possible but there is a loss in scale resolution. Please contact Allestec
for more information
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13.28 ALTERNATIVE REMOTE CALIBRATION PREPARATION C1
When a remote calibration system is utilized, the module must be locally calibrated with a 4-20mA stan-
dard prior to configuring the remote calibration module. This procedure insures that 0% LFL = 4mA and
100% LFL = 20mA, as perceived by the NT420 module.
NOTE: The NT420 module is factory calibrated for the current range listed above; however, it is rec-
ommended that the module calibration be verified before commencing the sensor calibration.
Verify that the NT420 module fault circuit is set for non-latching; otherwise, an operator will be
NOTE:
required to reset the module after the remote calibrator is removed.
CAUTION: A GROSS ERROR DURING REMOTE CALIBRATION COULD RESULT IN THE ACTI-
VATION OF THE ALARM RELAYS. OPERATOR SHOULD TAKE PRECAUTIONS AND
DISABLE EQUIPMENT CONNECTED TO THE ALARM RELAYS.
NOTE: Do not enter into the program mode to perform remote calibration. When utilizing a remote cali-
bration module, the NT420 module is automatically placed in the fault mode when a third-party
current meter is placed in the remote calibration module.
1 Now that the NT420 module is calibrated for a remote calibration module, all further calibrations are
performed at the transmitter location. Inserting the remote current meter at the transmitter will shunt
the current to the module, inducing a fault condition. Since there is no active current being transmit-
ted to the module, the output alarm relays will remain "no change". The alarm relays are NOT dis-
abled during this calibration.
2 Follow the manufacturer’s recommended procedure for remote calibration. The remote calibration
module will be adjusted for Zero and Span. There is no need to observe any data from the NT420
module during this procedure. After the remote calibration meter is removed, the NT420 will start its
30-second time delay sequence and will then display the %LFL.
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13.32 d0 - DISPLAY ZERO (Dead band) C1
The last program instruction is for sensors that could have a minimal drift problem. The module display
can be adjusted to not respond to any input current ranges that represent a display change between -3
and +3 and will remain at 00. Depress the SET switch to toggle the d0 to d1. A decimal appears in the
display during real time mode to identify that this function is selected. If a set point is selected within this
range, it will be acknowledged. Toggle the SET switch to 0 if this function is not correct. Review section
13.12 to exit program.
Refer to Figure 25 to identify the location of jumpers to install, thereby removing set point restrictions.
[] HHL Jumper - HIHI alarm Latch. The HIHI alarm is normally configured to latch. Install a
jumper to allow the HIHI alarm NOT to latch. There is no change in the program display.
[] HL Jumper - HI alarm Latch. The HI alarm is normally configured to latch. Install a jumper to re-
move the HI alarm forced latch. When this jumper is installed, the HL mode will appear in the pro-
gram display and will allow the operator the choice to latch or not to latch the HI alarm through the
program menu. A 00 in the display indicates the HI alarm relay will not latch. A 01 indicates the HI
alarm relay will latch.
NOTE: It is recommended that the above alarms remain latching unless their corresponding relays are
connected to an auxiliary system that accomplishes and reports the same latching feature.
[] HC Jumper - HI alarm Clamp. Install a jumper to allow the HI alarm to rise above 60% LFL.
There is no change in the program display.
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13.34 PROGRAMMING FOR THE C2- C4 H2S GAS CONFIGURATION
13.35 INTRODUCTION
Based on the calibration gas concentration utilized to calibrate the system, determine which
configuration from Figure 26 to refer to for additional information. Start at the beginning of the
C1 section to program the NT420 for the C2-C4 options. Then review the configuration chart in
Figure 26 to determine where the additional program steps below are included in the instruc-
tion set. After entering the set point and latching options, proceed to the calibration procedures
and final instructions of chapter 13.
NOTE: It is recommended that the above three alarms remain latching unless their corresponding relays
are connected to an auxiliary system that accomplishes and reports the same latching feature.
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13.40 PROGRAMMING THE OXYGEN GAS CONFIGURATION C5
13.41 INTRODUCTION
This section describes addition instructions that are in the program mode to properly set up the
controller for measuring oxygen. Start at the beginning of the C1 section to program the NT420
for the C5 options. Then review the configuration chart in Figure 26 to determine where the
additional program steps below are included in the instruction set. After entering the set point
and latching options, proceed to the calibration procedures and final instructions of this chap-
ter.
NOTE: The NT420 comes with the jumper, J7 & J8 properly inserted when ordering for oxygen applica-
tions.
NOTE: It is recommended that the above three alarms remain latching unless their corresponding
relays are connected to an auxiliary system that accomplishes and reports the same latching
feature.
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13.50 RELAY OUTPUT SELECTIONS FOR C1 THROUGH C4 CONFIGURATIONS
Each of the three alarm set points are connected to an output relay. The relays will energize when their
respective LED set point is activated. The relay outputs can be adjusted for normally open or normally
closed. Refer to Figure 25 to establish relay output configurations. The relays are rated 5A, 30VDC re-
sistive; 250VAC.
J1 through J6 are jumpers to accommodate heavy relay current capacity and it is imperative that each
jumper mating connector correlates to its respective mating pin. The NT420 will trip the alarm output
relays as specified below.
NOTE: Switch ON only the correct set point function to activate the Alarm Module. All unused switch
selections will remain in the OFF position. The STROBE circuit (channel 3) of the Alarm Module
automatically turns on with the activation of the Lo alarm of the NT420 module.
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13.52 RELAY OUTPUT SELECTION FOR C5 OXYGEN CONFIGURATION (continued)
Each of the three alarm set points are connected to an output relay. The relays will energize when their
respective LED set point is activated. The relay outputs can be adjusted for normally open or normally
closed. Refer to Figure 25 to establish relay output configurations. The relays are rated 5A, 30VDC re-
sistive; 250VAC.
J1 through J6 are jumpers to accommodate heavy relay current capacity and it is imperative that each
jumper mating connector correlates to its respective mating pin. The NT420 will trip the alarm output
relays as specified below.
NOTE: Switch ON only the correct set point function to activate the Alarm Module. All unused switch
selections will remain in the OFF position. The STROBE circuit (channel 3) of the Alarm Module
automatically turns on with the activation of the L1 alarm of the NT420 module.
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13.54 FAULT ANNUNCIATION
There are numerous conditions that determine if a fault is to be addressed. In any given circumstance
below, the module will remain in the fail mode as long as the fault remains. Unless the module is in its
program mode, the visual indication that a fault exists is evident by the yellow fault LED. Depress the
reset switch to reset the module after the fault has been eliminated, if the fault status is latching.
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14. APPROVED DETECTOR AND APPLIANCE COMPONENTS
Components that carry the Factory Mutual approval are approved by Allestec for connecting to the 800
panel. The user must identify such components and connect them as described in the context of this
manual.
The components’ operational specifications must fall within the Allestec module specification window to
be utilized correctly. There will be no exceptions for voltages, currents, or loads that may deviate from
the specifications as defined in this manual.
Should there be any questions pertaining to the installation of components, please contact Allestec prior
to installation.
15. MAINTENANCE
Preventative maintenance should be performed within the requirements of NFPA 72 and in accordance
with local and State codes. The final decision making on preventative maintenance should be the local
authority having jurisdiction on the system.
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16. WARRANTY
Allestec Corporation warrants the module parts and labor for three years from date stamped on the
printed circuit board. Allestec identifies each module by their unique serial number. Allestec will repair
any module found by us to be defective in workmanship or materials. This warranty does not apply to
any part or product that has been subjected to misuse, improper installation, or any type of alterations.
There are no implied warranties of merchantability, fitness or other implied warranties or representations
for any of Allestec's products except the warranty specified herein. In no event shall Allestec be liable for
any consequential, special or other damages attributable to our product except as specified herein. The
foregoing obligations are in lieu of all other obligations and liabilities including negligence, and of all war-
ranties of merchantability or fitness for a particular purpose or otherwise, express, or implied, in fact or in
law, and state Allestec's entire and exclusive liability and buyer's exclusive remedy for any claim of dam-
ages in connection with the sale or furnishing of the products, their design, suitability for use, installation,
or operation. Buyer is solely responsible for the proper installation, maintenance and use of the mod-
ules, and Allestec will in no event be liable for any special, incidental or consequential damages whatso-
ever.
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