INSTALLATION, OPERATION & MAINTENANCE MANUAL

MODULAR AIR HANDLING UNIT

CABINET FAN COIL UNIT

Please read this instruction thoroughly before using your units. Properly keep it.
The above figures are for reference only. Please refer to the object.
 1

DDM1401-A1
Part No.: M08019001007

Contents
1 Safety Precautions .....................................................................................................................3
2 User Instructions........................................................................................................................6
3 General........................................................................................................................................7
3.1. Modular Air Handling Unit............................................................................................................. 7
3.2. Cabinet Fan Coil Unit..................................................................................................................... 7
4 Installation ..................................................................................................................................9
4.1. Shipment......................................................................................................................................... 9
4.2. Acceptance ..................................................................................................................................... 9
4.3. Rigging............................................................................................................................................ 9
4.4. Storage............................................................................................................................................ 9
4.5. Assembly and Installation............................................................................................................. 9
4.6. Onsite Installation........................................................................................................................ 10
4.7. Ceiling Installation ....................................................................................................................... 12
4.8. Panel Holing*................................................................................................................................ 13
4.9. Pipeline Connection and Usage of Coils................................................................................... 13
5 Wiring Connection.................................................................................................................... 15
5.1. Lighting Connection*................................................................................................................... 15
5.2. Motor Cabling............................................................................................................................... 15
5.3. Motor Line Connection................................................................................................................ 15
5.4. Electrical Heating Connection* .................................................................................................. 17
5.5. Other Connection Lines*............................................................................................................. 18
6 Debugging and Commissioning.............................................................................................. 19
6.1. Debugging .................................................................................................................................... 19
6.2. Commissioning ............................................................................................................................ 19
7 Regular Maintenance ............................................................................................................... 20
7.1. Mixing Box*................................................................................................................................... 20
7.2. Filter Section*............................................................................................................................... 20
7.3. Coil Section .................................................................................................................................. 20
7.4. Fan and Motor .............................................................................................................................. 21
7.5. Silencer Section*.......................................................................................................................... 23
7.6. Electric Heater Section* .............................................................................................................. 23
7.7. Checking Section* ....................................................................................................................... 23
7.8. Others............................................................................................................................................ 23
8 Maintenance Plan of Units (Recommend)............................................................................... 24
2

9 Trouble-shooting ...................................................................................................................... 25
10 After-sales Service Warranty ................................................................................................... 27
10.1. After-sales Service ................................................................................................................. 27
10.2. Warranty .................................................................................................................................. 27
11 Repair and Maintenance Record ............................................................................................. 28
Appendix 1: Dimensions For DDW Frameless Unit ...................................................................... 29
Appendix 2: Dimensions For DDW Frame Unit ............................................................................. 31
Appendix 3: Dimensions For FUW-H/V Unit .................................................................................. 33
Appendix 4: Dimensions For FUW-A Unit...................................................................................... 35

Bulletin illustration covers the general appearance of our products at the time of publication and we reserve
the right to make change in design and construction any time without notice.
 3

1 Safety Precautions

Please read this instruction

Warning: Incorrect operations may cause death or serious accidents.

Caution: Measures need to be followed to avoid unit damages and personal injuries.

Indicate important instructions that must be followed.

Indicate actions strictly prohibited.

Installation Preparations and Precautions for Use

To ensure optimum performance of the unit, follow the instructions below during operations. If any
specification is not met, take feasible measures to solve the issue before power-on.

WARNING
Installation and maintenance should be The accessory can be installed by
performed only by professionals that are professionals that are entrusted.
entrusted by the supplier. Select the optional components designed
Installation and maintenance are to be by manufacturer. Improper selection may
performed only by trained and qualified cause electric chock, fire, or other
accidents.
personnels.

Ensure the installation follows the

Electrical part must be moisture proof.
instructions on this manual.
Otherwise, it may cause electrical shock,
Improper installation may cause unit damage, fire, or other accidents.
casualties, electric shock, fire, or other
accidents.

Installation and construction of the units Dedicated line should be installed by

must abide by local regulations. professionals in electrical installation.
Anti-wind, anti-shock and other preventive Electrical installation must abide by local
measures must be taken as regulated. regulations. Improper use of power cord
may cause electric leakage or fire.
Otherwise, it may cause dumping or falling
accidents.
The design of water pipe and air pipe
Increase equipment for rain and snow when
must abide by local regulations.
the unit is installed outdoors;

The highest operating temperature for

The unit installation base `must be
the unit is 60°°C.
supportable enough.
The unit must be installed on solid grounds to Too high ambient temperature or internal
temperature may damage the unit.
prevent from falling of the unit or injuries
caused by insufficient strength.
4

CAUTION
PRECAUTIONS BEFORE INSTALLING

The cold/warm water used by the unit Do not install the unit in terrible
must meet the standard. environment.
Using unqualified water may affect the life Do not install the unit near the exhaust outlet of
and performance of the unit. In severe case, a toilet, or a hospital operating room, or near
it may cause leakage. the processing facilities of sewers, because
The requirement of water quality refers to filth, oil stain, salinity or large amount of
Chapter 4. sulfurized gas may cause the corrosion of the
components.
Do not use lubricating oil or anti-freezing Do not install the unit in a place where
solution of wrong types and version. combustible gas leakage may happens. If the
Otherwise, it may cause damage to the unit. gas leaks and gathers around the unit, there is
a risk of explosion and fire accidents.
If the unit is installed near the hospital,
telecommunication station or other similar
Configure the residual current circuit places, take proper measures to safeguard the
breaker correctly. unit. Frequency transformer, house generator,
Install the residual current circuit breaker in high frequency medical equipment and radio
accordance with electrical regulations. Error communication device may cause the
installation may cause electric shock or other air-conditioner to run abnormally or quit
accidents. working.

Avoid tightening the power wire. Pay attention to product transportation.

Otherwise, heat is generated due to cable If the weight of the product is over 20kg,
fracture, thereby causing fire or other transportation needs to be finished by specific
accidents. machine rather than one person.

Correctly earthing of the unit. Safety guarantee

Earthing wires can not be connected to gas Construction personnel must be well-educated
pipes, water pipes, lightening conductor and for three-level safety knowledge, wear safety
telephone lines. Error earthing may cause helmets on site, fasten the safety belt when
electric shock. working at heights (2m or above), and wear
protective shoes.
The power supply voltage does not exceed Be careful when using electric tools. Only
rated voltage by ±10%, and the frequency electricians can connect and disconnect cables
does not exceed rated frequency by ±1%. or use the power distribution cabinet.
Coating operator must wear protective
equipment and ensure ventilation on site.Open
flame is prohibited at the construction site.
Power cable must be separate from solder Civilized construction is required. Do not
transformer which may cause wide voltage dispose construction materials and wastes at
range. discretion.

Civilized construction
Fan and motor must be equipped with Stack materials in specified positions on site
overload protection. Otherwise, it may and take proper measures to protect the
cause fire or other accidents. materials from moisture, rain, and snow if they
are stacked open.
Do not touch the sharp plate and heat During simultaneous operations in the same
exchange edges. room, all construction operators must respect
each other and work properly and
cooperatively.
Establish a civilized construction system. The
Ensure the drainage is smooth. construction team leader is responsible for
Improper drainage may cause poor drainage civilized construction in the working area.
so as to dampen the device.
 5

CAUTION
IINSTALLATION AND PRECAUTION
Do not use power switch to start or stop Stop the unit and cut off the power
the operation of unit directly. before maintenance.
Such error operation may cause electric After shutdown, the blades may still turn for
shock or fire accident. one to three minutes. Do not force the
blades to stop by hands or other objects.
Do not change the set value of the safety Proceed with the maintenance work after
protector. the blades stop completely. The unit can be
Otherwise, it may cause fire accident or installed and maintained only by
explosion. professionals. Otherwise, it may cause
electric shock, accidental injuries and other
Do not use fuse beyond the normal accidents.
capacity.
Replacing the fuse with wire may endanger Empty the remaining water inside the
the device or cause fire accident. unit when it stops working for a long
time.
Do not short-circuit the security device to When the unit is not operating, ensure that
start the unit. the water pipe is full of antifreeze or empty
This may cause damage to the unit or fire the remaining water inside the pipe.
and explosion accident. Otherwise, the coil may be cracked to leak
water due to frost.

Do not use other functions of the unit

beyond its scope of design. Do not place and hang any object above
The unit is not applicable to preserve foods, the unit.
plants and animals, precision instruments Object dumping or falling may cause
and artworks. Otherwise, the quality of these accidental injuries.
may be undermined.

Do not touch working components of

Do not dismantle the components and the unit.
change the connection lines at will. If Otherwise, accidents may occur.
necessary, please contact the seller.
Do not touch high-temperature
components such as the steam coil and
electric heating.
Do not use a damp hand to operate the Otherwise it may cause burning.
unit.
Otherwise it will cause electric shock. When the unit runs abnormally, cut off
the power immediately and contact the
seller.
6

2 User Instructions

Rights and Obligations

To ensure the warranty service, only the service personnel of our company or experienced technical
personnel is capable of the installation and maintenance work. We are not liable for any property loss or
casualties as result of violation.

Check
All units should be carefully inspected for damage when received and check whether all the components are
complete. Damage or loss of parts in shipment should be reported to the dealer in written form as soon as
possible.

Notice for Use

Clean the water system regularly.
In winter when the ambient temperature is below 0°C, take anti-freezing measures.
Particularly, external pump must be connected to the communications of the unit. Otherwise, the coil may be
frozen to damage due to water shortage.
Do not put objects near the air inlet or outlet, for which may undermine the unit performance or cause unit
shutdown.

Precautions
Precautions in chapter one are of great importance to follow.
These precautions should be at hand for reference at any time.
 7

3 General

This manual has been prepared as a guard for installing, operating and maintaining the modular air handling
unit and cabinet fan coil unit of our company. We have produced a quality product that will effectively meet
your application. However, proper installation, operation, and maintenance procedures must be followed to
realize the full capability and life of the unit.

3.1. Modular Air Handling Unit

DDM 06 07- C2 - H122310

Model name Serial number

Width modular Name of the series
Height modular
Model name: DDM
Height modular: 03, 04, 05
Width modular: 04, 05, 06 …
Name of the series: C2- 25mm panel series; C3- 30mm panel series; C5- 50mm panel series
XE- 50mm panel series; E5- 50mm panel series
Serial number: Factory internal identification code

3.2. Cabinet Fan Coil Unit

DDW 080 H R 15 - 4 L-F F B E

Model name Export label

Air flow code Design version number
Structure type Air outlet direction
Air Inlet condition Power mode
External total pressure Pipeline connection
Coil rows
Model name: DDW (Double-skin); FUW (Single-skin)
Air flow code: 020, 030, 040, 050, 060, 080, 150,180, 200,…
080-air flow is 8000CMH,
Structure type: H: Horizontal; V: Vertical
Air inlet condition: R: Return air unit; F: Fresh air unit
External total pressure: 08, 15, 22, 30,…
08-80Pa, 15-150 Pa, 22-220 Pa, 30-300 Pa;
Coil rows: 4: 4 rows; 6: 6 rows
Pipe connection: L: Left-oriented; R: Right-oriented
Power supply form: F: 380V/3N ~ /50Hz
Air outlet direction: T: Top air outlet (horizontal unit is Tl and vertical unit is T outlet);
F: Horizontal air outlet (FI outlet)
8

FUW 020 A - 4 L- A A A E

Model name Export label

Air flow code Design version number
Structure type Power mode
Coil rows Pipe connection type

Model name: FUW (Ultra-thin ceiling unit)

Air flow code: 015, 020, 025, 030, 035, 040,050
020-air flow is 2000CMH,
Structure type: A
Coil rows: 4: 4 rows; 6: 6 rows
Pipe connection: L: Left-oriented; R: Right-oriented
Power supply form: A: 220V/50Hz K: 220V/60Hz
Export label: E: Standard export unit U: Export unit configure with 60° threaded pipes
skip the domestic sold unit
 9

4 Installation

4.1. Shipment
The units can be delivered as separate section or completely assembled (ASS). For modular air handling unit,
complete knock down shipment (CKD) is needed if the unit is big in size or there is special requirement from
customers.
4.2. Acceptance
Check if the sections, accessories and panels are intact in accordance with packing list before installation. If
there is damage or loss in shipment, please inform the seller in written form as soon as possible.
4.3. Rigging
To prevent damage to unit cabinet, a specific lifting method for offloading the units is recommended as shown
in figure 1. A rod and ropes capable of bearing the weight during hoisting are required. The spreader bars
must be in position to prevent straps or cables from rubbing the frame panel. Ensure stability and balance
when lifting the units and avoid twisting or uneven lifting. Care should be taken to prevent coil connections,
drain pan connection and accessory section from damage.
It is proposed to handle the unit by forklift when it is on flat ground (Figure 2). The forks must only be applied
under the unit base frame or wooden frame and not against the panel. In case when fork of the forklift is too
short then suitable extensions should be used.

Figure 1 Figure 2

4.4. Storage
For external storage prior to installation, the units should be more protected by tarpaulins or similar and to be
protected from dust, rain, snow, constant sun exposure and rodents. Take care of the protection film on the
surface.
Do not stack the unit.

4.5. Assembly and Installation

a. Adjust the base level. Uneven base may lead poor drainage of the condensate water and cause leakage,
or damage the dynamic balance of the fan and cause breakdown and vibration of the bearing. When the
unit is shut down during winter, residue water inside the coil may cause frost cracking. Therefore, the
base must be placed horizontally and have enough strength.
b. Usually, the operating weight of the unit is more than 120% of the unit weight.
c. For unit installed on the ground, make sure the base and floor have enough strength. To reduce the
vibration of the unit, it is suggested to place a damping rubber cushion under the base. The factory can
select a damping cushion for the entire unit.
d. The base of the unit can be made from concrete placement or channel steel welding. Ensure that the
surface of the steel is straight during welding. The height of the concrete base should be at least 150 mm,
10

reserve trenches and floor drains around the base to ensure condense water discharge.
e. Drain pipes and traps must be at least same diameter as the drain pan connection. Drain pan must be
level to permit condensation from coil drain freely. See figure 3 for the recommended depth and distance
of drain trap installation. Drain pan are not designed to be walked on.

Negative Pressure Trap Positive Pressure Trap

H ≥ Maximum negative pressure/9.8+20mm (1mmH2O=9.8Pa)
Figure 3
4.6. Onsite Installation
The unit can be installed onsite only by professionals that are familiar with the unit and are specially trained.
Pay attention to the following:
a. Unit should be assembled in according with the drawing provided by factory exactly.
b. Installation and operation of the unit must abide by local codes and regulations.
c. Check whether the accessories and wooden case are in accordance with the packing list. Fix the
accessories (air valve, flange and weather proof) onto the unit.
d. Clear the impurities when you do installation and use compressed air or brush to clear up dust and
correct deformed fins.
e. Adequate space should be left around the unit for coils & drainage piping, filter replacement, and
maintenance. (Figure 4 shows the reserved space of modular air handling unit; Figure 5 shows the
reserved space of cabinet fan coil unit.)
>=W+100mm
W

>=600mm
>=W+100mm

Figure 4
 11

50
0
50 0
0 50

50
0 00
10
10
00

Figure 5
f. The design of air duct should abide by local codes and regulations.
g. Ensure that the length of straight duct is at least twice the length of the air outlet. Otherwise, it may cause
pressure drop.
h. The unit should not bear the weight of external pipelines and air ducts.
i. Thermal insulation must be achieved for air ducts.
j. Flexible connection between the unit and external air ducts can avoid vibration. Ensure that the joint is
sealed and treated with proper insulation to prevent condensation on the unit surface due to air leak.
k. Install the air filter before unit commissioning. Check whether the filter element of the air filter is damaged
or contaminated.
l. Provide weather proof and shading devices when the unit is installed outdoors.
m. The transportation sections of units must be closely linked. Otherwise, it may cause air leakage or
condensation. The method of linking between each transportation section is as follows:

For DDM-C Series/DDM-XE Series/DDW Vertical Units:

a. After install and level the first section in position, push the second section close to the first section after
the alignment is correct. Connect the two sections with bolts at the unit base without fastening. (For DDW
vertical unit, the channel steel does not need to be connected.)
b. Coat the joint of sections with glass cement. Snap the four PVC strips into the joint of sections.
c. Connect the top of the joint of the sections with connection blocks and bolts (Figure 7).
d. Tighten the bolt connecting the channel steel base and the connection blocks. Fix the PVC strips with
screws and cover the hole.

Figure 6 Figure 7
12

For DDM-E Series Units:

a. After install and level the first section in position, push the second section close to the first section after
the alignment is correct.
b. Connect the channel steel bases of the two sections with bolts, and tighten the bolts (Figure 6).
c. Snap the four connection strips into the joint of sections, and fix them with ST4.8*16 screws.
d. Install the cover plate attached with sealing strip to the joint of sections, and fix it with ST5.5*25 screw
(Figure 8).

Figure 8
4.7. Ceiling Installation
Assemble the unit before ceiling operation. Ensure that the components are installed and the sections are
properly connected. The unit should be placed on an integrated channel steel for hoisting, or the unit
performance may be undermined by the inconsistent installation heights.
Roof hoisting is prohibited since the roof cannot bear the weight of the unit.
Ensure that the construction components for ceiling, the integrated channel steel and hoisting rod have
enough strength to meet the standard of operation weight. Determine the position of the hoisting rod and
adjust the fixed screw to keep the unit balanced.
Add a bumper on top to reduce vibrations (Figure 9). A spring bumper is recommended.

Figure 9
 13

4.8. Panel Holing*

The holing of onsite electric and control wiring follows the steps below:
a. Determine the number and location of holes required for electrical conduit, piping, and control wiring.
Mark them with black oil pen. Do not open holes on the access panel.
b. Once a proper location is determined, drill a small pilot hole completely through the panel. Then use a
sharp hole saw or a saber saw and cut from each side of the panel.
c. Seal the double-wall panel on each side with an industrial/commercial grade silicone sealant or duct seal
compound. It is extremely important to seal each panel hole or penetration securely so it is airtight,
watertight, and so that there is no exposed insulation.

Figure 10
*For FUW units, there is no need for extra holes as electric wiring is led to the terminal block.

4.9. Pipeline Connection and Usage of Coils

a. The installation of water system pipes should abide by local laws and regulations.
b. In order to optimize performance and save installation cost, designer should manage to reduce bending
and replacement during design stage. The pipeline system must be treated with proper insulation. Wash
the pipes after being installed. Ensure the valves connecting units are closed during washing to prevent
the sundries in the pipe from being flushed into the coil and block the passage.
c. Pipes connecting to the coil should in according with the stickers. (Cooling coil is in bottom-up direction,
while steam coil is in top-down direction) to avoid wrong connection.
d. Do not change the orientation of pipeline connection.
e. To avoid damaging the coil connections at coil header, it is essential to hold the hexagonal connector with
tools whilst applying counter force to tighten the joint. (Figure 11).

Figure 11
14

f. Install a steam trap at the outlet of steam coil to ensure smooth drainage if a steam coil is used. The
installation of steam pipe must abide by local laws and regulations to ensure that the saturated steam
enters the steam coil which prevents the coil from water hammer.
g. Allow the linkage between inlet water and fan to avoid the coil under-cooling or overheating. The coil
operates only when the fan runs.
h. The designed operation pressure of the coil is 1.6 MPa. Too high pressure will damage the coil.
i. During commission or out running of the unit in the winter, discharge the remaining water in the coil
(system) timely or adopt other methods (for example, add anti-freezing solution) to prevent the coil from crack
in low temperature (for details, refer to the maintenance and preservation of the coil).
Warning: Improper commissioning and maintenance may cause coil crack in low temperature.
j. If the ambient temperature or air inlet temperature is equal to or lower than 2°C, install preheating device
at the air inlet of a fresh air handling unit. In addition, a sealed regulating valve needs to be installed at
the new air inlet. Install anti-freezing switch beside the coil and interlock it to the sealed regulating valve
and the fan. When the unit starts, start the preheating coil or take other measures beforehand to prevent
the coil from cracking in low temperature. And when the unit is running, constantly provide the coil with
warm water with a temperature of no less than 60°C and ensure that the water flow speed inside the coil
is no less than 1 m/s.
k. Water quality requirements: Water softening treatment must be given in advance to prevent scaling in the
heat exchanger which may affect heat exchange effect. Moreover, water without softening treatment may
form scale in the pipe to increase water resistance which will affect water flow and pump work efficiency.
Reference Tendency
Item
value Corrosion Scaling
pH(25℃) 7.5～9.0 ○ ○
Conductivity (25℃) µS/cm ＜800 ○ ○
-
Benchmark Cl
－
mg(Cl )/L ＜200 ○
items SO42- mg(SO42-)/L ＜200 ○
Acid consumption (pH=4.8) mg(CaCO3)/L ＜100 ○
Full hardness mg(CaCO3)/L ＜200 ○
Fe mg(Fe)/L ＜1.0 ○ ○
2- 2-
Reference S mg(S )/L 0 ○
items NH4+ mg(NH4+)/L ＜1.0 ○
SiO2 mg(SiO2)/L ＜50 ○
Note: ○ refers to that this factor is related to the tendency of corrosion or scaling
 15

5 Wiring Connection
Electric connecting should be compliant with relevant local laws and regulations. Besides, pay attention to the
following:
a. Before connecting, check whether the power supply meets the requirement of the voltage value stipulated
on the of unit nameplate;
b. Set up an independent electrical power supply, power off and overload protection device for each unit.
c. The voltage difference between any two-phrases of power supply should be smaller than 2% of the
nominal voltage.

5.1. Lighting Connection*

We provide 36V/24V light for modular air handling units. Ensure that correct power supply voltage is used
during connecting (see Figure 15). Transformers are optional by user.
*Apply to modular air handling units only.

Figure 15

5.2. Motor Cabling

Motor wiring must go down along the enclosure and must be fixed by the cable clips, it is prohibited to go
upwards or oblique and prevent condensation water flowing into motor and lead to a failure.
The leading-out hole of the motor connection box must be sealed.

Correct connection Wrong connection Wrong connection

Figure 12
5.3. Motor Line Connection
The line connection method of motor varies with local power supply. Please refer to the motor nameplate.
In the following figure, 380V/3N~/50Hz model is taken as an example to show the connection method:
16

MOTOR POWER≤3kW 3kW＜MOTOR POWER＜11kW MOTOR POWER≥11kW

Figure 13
The following figure is the schematic diagram of motor line connection of FUW series unit. Contact the factory
if the local power supply is not consistent with that shown in the diagram.

Figure 14
 17

5.4. Electrical Heating Connection*

*Electrical heating section is available to only modular air handling units.
Before leaving factory, internal lines of electrical heater have already been connected and an inlet for power
cable connection has been left. Connect lines in strict accordance with electrical schematic diagram indicated
on the device label. Do not change the connection at will.
Warning: Change the connect wires without permission may cause fire, casualties, or other major accidents.
In such cases, customers shall liable for the consequences.
When the factory does not configure the control cabinet, on-site cable distribution must be performed in
accordance with the instructions shown in Figure 16.
Connection methods of electrical heater may be different due to the varied local power supplies in different
regions. Refer to the circuit diagram in the connection box of the electrical heating section of the unit. The
following figure takes the 380V/3N~/50Hz model as an example:

L1 L1
power supply L2 L2
380V/3N~/50Hz L3 L3
N N
customer must configure PE PE
another contactor
Q1 Q2 Qn
power supply
KM1 KM2 KMn

TB1 TB2 TB3 TBn

A B L N R S T N R S T N R S T N

A B L N

KM1 KM2 KMn

DPS
KMI KM2 KMn
1 5
KM1
F1 F2

2 4

TH1 TH2
3

group 1 group 2 group n

Description： F1/F2: Fuse； TH1/TH2: Temperature Control Switch

TB1～TBn : Terminal Block； KM1～KMn: Contactor
Q1~Qn: Breaker DPS: Differential Pressure Switch；

Figure 16
a. For each group of electric heater, third-party control cabinet must be configured with another contactor,
cannot share the same contactor which is factory equipped.
b. L, N port on the terminal board TB1 must be supplied with independent 220V single-phase power.
c. Electrical heating high temperature protection and non-wind protection port A and B must be connected in
serial to the control loop of electrical heater.
d. Enable the fan before enable the electrical heater. After the fan starts and a certain air flow is reached,
pressure difference switch will close, L and N power supply loops are connected. The contactor
configured in the electrical heater connection box is connected simultaneously, and the electrical heater is
allowed to operate. However, whether the electrical heater can be powered on and starts to operate is
18

determined by the connection of the contactor in the customer’s control cabinet (the connection of
customer-configured connector is determined by the requirement of hot load capacity and electrical
heating protection A and B loops);
e. Fuse F1 and temperature control switch TH1 are installed on the top of electrical heating zone. Fuse F2
and temperature control switch TH2 are installed near the inlet of fan section. When the fan is running,
the electrical heating is powered down if the protection switches A and B are disconnected. In this case,
Users must check the equipment to ensure that no failure occurs before the electrical heater is started
again.
f. If the fan goes down and the electrical heater is not closed, the trebling protection of DPS. F1 and TH1
will cut L and N power supply loops, and disable electrical heating;
g. If the fan runs in an over-low frequency and the air flow reduces but does not reach the set point of
differential pressure switch, the air supply temperature increases until it reaches the set point of F2 or
TH2. Then, F2 and TH2 protection will cut down L and N power supply loops and disable electrical
heating.
Warning: Electrical heating high-temperature protect and no flow protect switches should be connected to the
control circuit in series. It can not be short circuit. The heating can be turned on only when the fan is work and
the fan can only stop after 3 minutes since the heating off.

5.5. Other Connection Lines*

Wiring of other components such as humidifier refer to the manufacture’s instructions attached.
Notes:
a. The humidifier must be interlocked with the fan. That is, the humidifier can be enabled only after the fan
starts; the fan can be shut down only after the humidifier is disabled;
b. The fan should only be turned on after the damper actuators on and before the actuators off. The damer
should be on when the fan running.

*Other sections such as humidifier is available to only modular air handling units.

Warning:
All electrics must be safety grounded, and cannot be connected to neutral instead. Incorrect connection can
cause severe explosion, fire and personal injuries.
A circuit-break device with sufficient capacity must be installed near the inlet power cable. The circuit-break
device must support short-circuit protection and earth-fault protection, and the clearance between open
contacts must be at least 3 mm.
 19

6 Debugging and Commissioning

6.1. Debugging
a. Detect whether the installation is completed and whether internal sundries are removed;
b. For model with spring isolators, temporary transport brackets are fitted to prevent damage during
shipment. All transport brackets must be removed after installation and adjust the spring’s height
accordingly to ensure the frame is level before commissioning by turn the adjustment nut bolt clockwise
or anti-clockwise. Tighten the bolt after completing adjustment. (Figure 17);

Please remove them after installation

and before commissioning.

Figure 17
c. Check whether the filter material is damaged or polluted. Install high efficiency particulate air filter after
debugging. User may prepare primary filter for debugging;
d. Check the lubrication of rotatable parts, whether the fan impeller collides with enclosure;
e. Check the tightness of belt (see Figure 20);
f. Check whether the dampers are opened as designed and the locking mechanism is locked securely;
g. Check whether the water system is clean and out of air. Before supplying water, open the vent valve first
and empty the air in the pipeline until water outputs;
h. Avoid coil freezing during the debugging in winter. Constantly supply hot water with an temperature of not
lower than 60°C to the unit coil and ensure that the water flow rate in the coil is not slower than 1 m/s.
Drain all water or add anti-freezing solution if the unit is not to be operated after debugging (for details,
refer to the maintenance and preservation of the coil).
Warning: Improper debugging and maintenance may lead the coil to crack in low temperature.
i. Detect whether the motor insulation is qualified. Measure the motor insulation value before using. Note,
discharge the wind after measurement immediately to avoid electric shock. If the insulation resistance
cannot reach the related standard, dry the wind;
j. Check the power supply voltage and the circuit connection. Inch the motor before officially launch it to
ensure that the turning of the motor and fan is correct (the turning of fan should be consistent with the
arrow direction specified on the fan).
6.2. Commissioning
The unit can be started after the above checking procedure is completed. Check whether the running current
of motor and unit sound is abnormal after the unit starts. Check the air flow, pressure of unit. Adjust the
cooling capacity and humidification amount according to different working conditions. Check whether the fan
speed exceeds the working speed stipulated on the fan nameplate.
The following conditions are not considered abnormal:
Noise: Noise is generated due to high speed air flow and the turning of fan and motor.
Vibration: High speed turning of fan and motor generates vibration.
It is normal that the noise and vibration do not exceed the value specified by relevant standard.
20

7 Regular Maintenance

Perform a good maintenance and preservation can reduce fault of running. The maintenance period of
components see Chapter 8 (Recommend).

7.1. Mixing Box*

a. Check the operation of damper mechanisms and adjust arms and damper blades for a proper position.
b. Lubrication of bearings and connecting rod regularly
c. Clear the damper regularly

*Apply to modular air handling units and certain DDW series units only.

7.2. Filter Section*

During system start up, filter are likely to become rapidly blocked. Disposable filters and bag filters must be
replaced each time when pressure drop reaches the indicated dirty condition by Manometer. Washable filters
must be cleaned periodically. The pressure drop indicated dirty is advised as following.
Filter Specifications Suggested Final Resistance (Pa)
G3 100~200
G4 150~250
F5~F6 250~300
F7~F8 300~400
F9~H10 400~450
H11~H13 400~600

*Apply to modular air handling units and certain DDW series units only.

7.3. Coil Section

Periodic cleaning of coils is required. Clear the coil deposit regularly with low-pressure water hose or
low-pressure air. Dry cleaning is done by using a powerful vacuum cleaner on the dust-accumulated side.
Dirty coils have tendency to increase airside pressure drops and reduce cooling/heating efficiency. Ensure coil
fins are not damage when performing dry/wet cleaning.
Check that drain pan and drain trap are free from blockage and water accumulation at pan.
Inspect and clean condensate pan to avoiding clogging of drainage of dirt, dust, etc. Inspect drainage piping
to ensure the proper condensate flow. If humidifier is installed, check for build up of mineral deposits.
Check that frost protection is working before starting of each winter season.
Anti-freezing of Coil
The daily operation cannot discharge the water from coil totally.
Anti-freezing of coil consists of drying coil and washing coil with anti-freezing solution.
The steps of drying coil are as follows:
a. Shut off the water supply. Drain the coil, using vent and drain valves. This step requires opening of the
header vent and removing the plug.
b. Connect the blower to the return header of coil. Close vent and drain valve;
c. Operate the blower for at least one-half hour and then check coil for dryness. This check may be made by
 21

holding a mirror in front of the discharge from the coil. If water is still being removed, the mirror will
become fogged. Continue to operate the blower until the coil is dry.
d. Bump or jar the coil slightly during the blowing operation, if possible. This will free any water, that may be
trapped and may also dislodge any dirt or scale which can trap water in the coil. Take care not to damage
the coil.
e. Allow the coil to stand for a few minutes after it is first blown out to give the moisture that adhered to the
walls of the tube a chance to accumulate. Blow it out again and if any water comes out, repeat the
blowing operation.
f. Leave drains open and all plugs out until the coil is returned to service.
The steps of washing coil with anti-freezing solution are as follows:
To wash the coil with anti-freezing solution, a centrifugal pump with motor and a running piping holding
anti-freezing solution and its container are required. The lowest temperature decides the concentration of
anti-freezing solution.
a. Shut off the water supply. Open the vents and drains provided to allow the coils to drain as complete as
possible.
b. Complete piping connections to the coil as shown in figure 3. Configure a throttling valve to the loop;

Figure 18
c. With throttling valve and drain valves closed, start the solution pump and operate until air is vented from
coil.
d. Close air vent and open throttling valve about halfway. Circulate solution about 15 minute and then check
the glycol solution strength .
e. If the solution is too weak, add anti-freeze solution to bring it up to desired strength and again circulate
through the coil for about 15 minutes.
f. When the concentration of solution returning from the coils is found satisfactory, shut down the pump and
drain anti-ffreeze from the coil.
g. The same solution can be used for flushing additional coils, providing its concentration is maintained.

7.4. Fan and Motor

a. Detect and clean to fan regularly to ensure nice running state of fan.
b. Inspect for any obstructions or blockages at air intakes and discharges.
c. Grease lubrication has been added to fan bearing and motor bearing when leaving factory. Motor bearing
is closed and it is not required to add lubrication oil. Fans without bearing pedestal and there is bumper
22

rubber blanket, grease lubrication has been added to bearing and it is not required to add lubrication oil.
Fans with bearing pedestal, add lubrication oil through nipple while lubrication oil exceeds the period of
validity. The period of validity depends on grease type, rotate speed and working temperature of bearing.
Regular detect the grease when using. When the grease eliminated is black and thick, which shows the
oxidation of grease, change the lubrication oil and shorten the interval of changing.
The recommended interval is 1000~2000 h.
Note: Use only the lubricating oil with the same brand of the original one. The using of lubricating oil of
another brand may cause bearing invalidation.
d. After running for a period of time, check the service condition of absorber. Determine
whether the absorber can meet the shock absorption requirement according to practical
running condition.
e. Regularly detect the bearing of fan and motor to see whether the bearing is loose. Fix the bolt on the
bearing firmly. Detect the running condition by monitoring abnormal noises and vibrations. Stop the unit
immediately when the abnormality happens. Then, find the cause and solve the problem. Install and
replace the bearing with special tools, instead of knocking or prizing it with brute forces.
f. After running for a period of time, recheck the straightness of pulley and the tension of belt. Adjust and
replace the pulley or belt in necessity.
g. Check whether the side of V pulleys of the fan and motor are on the same plane. Ensure the straightness
of pulleys. Usually, the four-point method can be used to detect and adjust the straightness of pulley. (see
Figure 19)

Figure 19
h. When changing the V belt, use the same brand V belt of the same model and ensure that the ribbon
matches the race of pulley.
i. Detect and adjust the tension of V belt with a recognized belt tension gauge. (see Figure 20)
Measuring method: Measure the span Ls (mm) and calculate the bending ∆L: ∆L(mm) = Ls x 0.016. Extrude
the tension gauge to bend the belt until the bending reaches ∆L. Then, read the tension gauge value and
compare the value with those in the following table. Adjust the belt to a proper tension according to the
comparison result.

Figure 20
 23

Minimum tension load (unit: kgf/ pc of belt)

Belt diameter (mm)
SPZ/3V
63~90 91~125 126~160 161~200
New product installation 2.1 2.6 2.8 2.9
Re-adjustment 2.5 3 3.2 3.4
Belt diameter (mm)
SPA
90~125 126~160 161~250 251~315
New product installation 3.3 3.9 4.5 4.8
Re-adjustment 3.8 4.5 5.2 5.5
Belt diameter(mm)
SPB
140~190 191~236 237~315 316~400
New product installation 5.5 6.2 6.9 7.3
Re-adjustment 6.4 7.2 8 8.5
Belt diameter(mm)
SPC
224~315 316~400 401~500 501~710
New product installation 2.6 3 3.2 3.6
Re-adjustment 3.1 3.4 3.7 4.2
Notes:
V pulley and its wheel are adjusted before leaving factory. check again before operation.;
After running for 48 hours, re-adjust the tension of V belt to a proper value;
After running for a month, re-adjust the tension of V belt;
Interval check should be implemented every 3 months.
Warning: Over tension toward drive belt will cause premature failure of belt and bearing.

7.5. Silencer Section*

Regularly detect the silencer. Clean and replace it if damage or corrosion happens.
Clean the muffler with a vacuum cleaner.
Note: Do not damage the mute cotton in the muffler.

7.6. Electric Heater Section*

Regularly detect whether the protector of electric heat section and fan section is valid.(DPS, temperature
controller and fuse)
Regularly clean the surface of electrical heating.
Note: Do not touch the surface of electrical heating to avoid being scratched or burnt.
7.7. Checking Section*
The unit can be maintained through the access door. Open the access door by following the direction
identified on the door.
Note: Close and lock the access door after detection to prevent entrance of other people or object by accident.

7.8. Others
For details about other components (such as the humidifier, transducer and heat runner), see the attached
components introductions.

*This functional section is available to only modular air handling units.

24

8 Maintenance Plan of Units (Recommend)

Maintenance Maintenance interval

Parts Inspection Item
Measure Weekly Monthly 3 Monthly 6 Monthly Yearly
Fan in general Check/Clean √
Check/Clean/
Fan bearing √
Greasing
Motor in general Check/Clean √
Motor bearing Check √
Check/Repair/
Motor Temperature √
Replace fan
Belt drive tension Check/ Re-tension √
Fan/motor Detection/Clean/
V belt √
Greasing
Corrosion and Check/Treat/
√
damage Repair
S Bolt & nut secure Check/Tighten √
Excessive vibration Check/Reset √
Flexible connection Check/Tighten √
Vibration isolator Check/ Adjustment √
Blocking of duct Check/Clean √
Fin block Check/Clean √
Frost protection Check/Apply √
Drain trap clog Check/Clean √
Coil
Section Check/Treat/
Corrosion √
Repair
Leakage Check/Repair √
Bolts & nuts secure Check/Tighten √
Resistance
Check/Clean √
(Washable)
Filter
Resistance
Check/Change √
(Disposable)
Eliminator* Dirt accumulation Check/Clean √
Silencer* Health/corrode Check/Clean √
Heat Dirt retention Check/Clean √
exchanger* Sealing strip Check/Change √
Electric Trebling protection Check/Repair √
heater * Electric heater tube Check/Clean √

*This functional section is available to only modular air handling units.

 25

9 Trouble-shooting

Common
Location Possible Causes Solutions
Failure
The impeller is eccentric.
Contact the dealer.
The gap between bearings is too large so
Contact the dealer.
that the connection is loose.
Contact the dealer.
Abnormal The impeller is loose.
Contact the dealer.
sound 1. Impeller The connection between the roller and
Contact the dealer.
bearing is loose.
Fasten the bolt.
The impeller is damaged.
Remove the
The fan fastening bolt is loose.
sundries.
Sundries exist in fan.
Pulley is not fixed on roller.
Fasten the pulley.
V belt is loose, and is adjusted in 48 hours
Adjust the V belt.
after the first running.
Adjust the V belt.
V belt is too tight.
Replace the V belt.
Improper model of V belt is used.
Replace the V belt
Lengths of V belts in a unit where multiple
2. Gearing and make sure all the
V belts are uses are different.
V belts are of the
Fan V pulley and motor V pulley are not
same length.
aligned.
Justify the V pulleys.
V belt is damaged.
Replace the V belt.
Bolts on the motor and those fastening
Fasten the bolt.
the motor cabinet are loose.
Replace the bearing.
Add lubricating oil.
The bearing fails. Fasten the bearing
There is a lack of lubricating oil. cabinet.
The bearing cabinet is loose. Perform
3. Bearing Installation is not straight. re-installation.
Sundries exist in the bearing. Remove the
The bearing is damaged. sundries.
The bearing gets rusty. Replace the bearing.
Remove the rust or
replace the bearing.
Remove the
There are sundries in the volute.
sundries.
4. Fan volute The volute is loose.
Contact the dealer.
The inlet air volute is damaged.
Contact the dealer.
Fasten the accessing
The accessing cables are loose.
cables.
Motor or relay generates hum supply noise.
5. Electrical part Contact the dealer.
Three-phase machine supplies
Supply three-phase
single-phase electricity.
electricity.
Replace the roller.
The roller is bent or deformed.
Fasten the
6. Roller The counterbalance is loose.
counterbalance.
The roller is loose.
Fasten the roller.
Air pipe is too small. Adjust the air pipe.
7. Excessive wind Static pressure is lower than design value Adjust the system.
speed in practice. Enlarge the opening of
The opening of air valve is small. the air valve.
26

Air pipe is too small.

Adjust the air pipe.
The return air valve or mixed air valve is
8. Periodicity Fasten the air valve.
loose.
Vibration Adjust the system.
The system is unstable.
Adjust the fan speed.
Air pipe vibrates with the pulsation of fan.
9. Noise caused
when high speed
Air leaks from the air pipe. Add sealant.
wind flows through
gaps and holes
The air valve is loose.
Fasten the air valve.
The air valve is not closed tightly.
Replace the air valve.
The turn of the air pipe is not smooth.
10. Gurgle sound Adjust the air pipe.
The air pipe is abruptly extended or
or harsh squealing Adjust the air pipe.
shrinks.
generated when Adjust the air pipe.
Wind speed in the air pipe is too large.
high speed air is Adjust the
The anti-vibration pad (vibration
blocked anti-vibration pad.
attenuation contact) is too tight.
Add vibration
Effective vibration isolation measure is
isolation device.
not taken for vibration components.
Contact the dealer.
The impeller is installed incorrectly. Adjust the phase
1. Fan
The impeller rotates reversely. sequence of power
supply.
Practical resistance is lower than the
Adjust the system.
design resistance.
2. Ventilation Open the air valve.
Air valve is closed.
pipe system Add sealant.
Air pipe seals improperly.
Open the FRD.
FRD is closed.
Insufficient air Clean or replace the
3. Filter The filter is dirty or even blocked.
output filter.
although the 4. Coil The filter is dirty or even blocked. Clean the coil.
fan runs Outlet and inlet area of the fan are not
normally 5. Short cut of clearly distinguished. The wind flows from Add a wind-separating
airflow the outlet area directly to the inlet area board.
through the loosely connected separation.
Return air place is bend, and the fan port
6. Blocked fan Move the fan.
and unit wallboard are too close.
inlet Remove the obstacles.
There are obstacles in fan port.
7. No straight The capacity of fan can be reduced if no Install the straight
pipe at fan outlet straight pipe is used. pipe.
8. Obstacles in There are obstacles in the fan outlet. Remove the obstacles.
the wind system There is a bend in the fan outlet. Adjust the air pipe.
The size of air pipe is improper.
Adjust the air pipe.
The access door is open.
Excessive air Close the access door.
The system is not balance. Practical
output Adjust the system.
1. System resistance is lower than the design
although the Install the air valve or
resistance.
fan runs vanes.
Air valve or vanes are not installed.
normally Reinstall the filter.
Filter falls off (or is not installed).
2. Air duct Leakage exists in return air pipe. Add sealant.
Clean or replace the
Stale air in the 1. Filter The filter is dirty.
filter.
air-conditioned
Increase the fresh air
room 2. Fresh air Fresh air output is insufficient.
output.
 27

10 After-sales Service Warranty

10.1. After-sales Service
To repair or maintain, please contact your dealer firstly. Improper repair or maintenance may cause leakage,
electric shock or fire.
To move and reinstall the unit, contact your dealer firstly. Improper installation may cause leakage, electric
shock or fire

When requiring repairmen, please provide the following details:

Model (see the nameplate or warranty application form);

Factory number and date of installation (for details, see the warranty application form);
Details of the failure(s);
Your name, full address and telephone number.

Repair after the Warranty Period Expires

Please contact your dealer. Chargeable service will be provided if the dealer can repair the unit.

Checking and maintenance

After several seasons’ operation, the units’ performance will be decreased because of dirt or dust
accumulated inside units.
Besides the owner’s daily maintenance, it is suggested to sign a contractor with maintenance with distributor
or manufacturer.
As for the details of service, please contact with distributor.

Enquiry
Any question about after-sales service please contact distributor.

10.2. Warranty
A warranty application form is attached.
The dealer will give you the warranty application form after filling in necessary items.
Please keep warranty application form after checking the content.

Warranty Period
The product is warranted for one year since the date of purchase. For details, see the warranty application
form.
During the guarantee time, any services are free if presented warranty application Otherwise, you will be
charged for the costs.
28

11 Repair and Maintenance Record

The fault diagnosis and troubleshooting process should be described in details as possible.
For details about troubleshooting, refer to Chapter 9 “Common Failure and Solution of Unit".
Stop running the unit and cut the power when a failure is unclear. Consult the local dealers before further
processing.
Please properly keep the record.

Model: __________________________

Factory Number:___________________________

No. Failure Description Troubleshooting Result Recorded by Recorded at

10

DAIKIN INDUSTRIES, LTD.

Head Office:
Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,
Kita-ku, Osaka, 530-8323 Japan
 29

Appendix 1: Dimensions For DDW Frameless Unit

1. UnitSingle-fan Horizontal Unit 2. Double-fan Horizontal Unit

J 45 J 45

28.5
28.5

Q
L Q

L
F S D S

F D

N
N

Hanging Holes 4-φ 15

Hanging Holes 4-φ15

F S D S
A
F D M
A M+60
M Air Vent G E
M+60
Air Vent G E
Water Outlet

40

H
Water Outlet

K
C
H

E
C

Water Inlet
E

Water Inlet

G
I
G
I

P
B 90
40 B 90
50

Condensation Pipe R1-1/4

Condensation Pipe R1-1/4

Table 1 Unit: mm Table 2 Unit: mm

Hanging Hanging
Dimension L W H Outlet Dim Pipe Fix Dim Inlet Dim Dimension L W H Base Outlet Dim Pipe Fix Dim Inlet Dim
Hole Dim Hole Dim
G G L L G G Q Q L L
Model A B C D E F H I Q J K M N Model A B C P D S E F H I J K M N
(FI* ) (TI*) (4R) (6R) (FI* ) (TI*) (4R) (6R) (4R) (6R)
DDW020H 900 960 600 300 265 192 97 208 256 123 109 82.5 137.5 808 460 1020 903 DDW100H 1690 1170 930 50 292 375 407 70 97 242 625 130 109 109 82.5 137.5 1598 790 1810 1113
DDW030H 1050 1000 650 333 292 286 97 203 319 123 109 82.5 137.5 958 510 1170 943 DDW120H 1690 1170 1050 50 292 375 407 104 97 248 752 127 109 109 82.5 137.5 1598 910 1810 1113
DDW040H 1080 1100 730 398 344 235 97 204 434 127 109 82.5 137.5 988 590 1200 1043 DDW150H 1940 1170 1180 50 292 375 407 222 97 237 863 137 123 109 110 137.5 1848 1040 2060 1113
DDW050H 1250 1060 730 398 344 319 97 217 434 127 109 82.5 137.5 1158 590 1370 1003 DDW180H 2120 1310 1240 50 341 432 481 164 100 317 926 139 124 110 110 137.5 2028 1100 2240 1253
DDW060H 1320 1150 800 473 407 324 97 240 498 128 109 82.5 137.5 1228 660 1440 1093 DDW200H 2300 1310 1240 50 456 559 481 111 100 314 926 135 124 110 110 137.5 2207 1100 2420 1253

DDW080H 1680 1150 800 473 407 532 97 237 498 128 109 82.5 137.5 1588 660 1800 1093 DDW250H 2400 1310 1430 50 456 559 481 111 100 309 1104 143 124 110 110 137.5 2307 1290 2520 1253
DDW300H 2766 1646 1549 63 449 569 569 278 203 --- 1167 191 154 140 110 137.5 2683 1396 --- ---
DDW350H 2766 1646 1709 63 449 569 569 278 203 --- --- 185 164 150 110 137.5 2683 1556 --- ---
DDW400H 2926 1646 1869 63 500 638 638 266 200 --- --- 182 174 160 110 137.5 2843 1716 --- ---
DDW450H 2926 1646 2029 63 500 638 638 262 200 --- --- 182 174 160 110 137.5 2833 1876 --- ---
Note: Air outlets with dotted lines are for units with fan top outlet.
FI* and TI* means the fan discharge arrangement.
30
3. Single-fan Vertical Unit 4. Double-fan Vertical Unit
45 J J 45

Q
Q

L
L

40
G D F E

40
G D N D F E

Air Vent
Air Vent

Water Outlet

C
C Water Outlet

K
H

K
Water Inlet

Water Inlet

I
I

B 90

63
B 90 A Condensation Pipe R1-1/4
63

A
Condensation Pipe R1-1/4

Table 3 Unit: mm Table 4 Unit: mm

Dimension L W H Outlet Dim Pipe Fix Dim Inlet Dim Dimension L W H Outlet Dim Pipe Fix Dim Inlet Dim

Q Q L L Q Q L L
Model A B C D E F G H I J K Model A B C D E F G N H I J K
(4R) (6R) (4R) (6R) (4R) (6R) (4R) (6R)

DDW040V 980 650 1283 333 292 149 195 498 127 181 181 82.5 137.5 888 655 DDW150V 2090 900 1673 473 407 151 167 382 736 138 194 180 110 137.5 1997 902

DDW050V 1140 650 1343 397 343 86 267 498 129 180 180 82.5 137.5 1048 649 DDW180V 2240 900 1923 430 481 107 269 342 863 137 196 182 110 137.5 2147 1035

DDW060V 1210 650 1403 397 343 93 335 561 128 179 179 82.5 137.5 1118 709 DDW200V 2320 900 1983 559 481 112 140 465 926 137 204 190 110 137.5 2227 1095

DDW080V 1320 810 1613 473 407 88 329 688 132 177 177 82.5 137.5 1228 842 DDW250V 2670 900 2043 559 481 88 267 456 976 141 193 179 110 137.5 2577 1155

DDW100V 1390 900 1853 559 481 114 259 815 129 189 189 82.5 137.5 1297 965

DDW120V 1530 900 1923 559 481 115 337 879 130 179 179 82.5 137.5 1437 1035
 31

Appendix 2: Dimensions For DDW Frame Unit

1. Single-fan Horizontal Unit 2. Double-fan Horizontal Unit

J 46 J 45

25

Q
25

L 137

L
F S D S

N
N

Hanging Holes 4-φ15

Hanging Holes 4-φ15

F S D S
A
F D M
A M+60
M
M+60

G
Air Vent 40 E Water Outlet
G
E Water Outlet
40
Air Vent

K
C
H

Water Inlet Water Inlet

K
C

E
G
G
I

P
B 90 B 90
50

Condensation Pipe R1-1/4 Condensation Pipe R1-1/4

Table 1 Unit: mm Table 2 Unit: mm

Hanging Hanging
Dimension L W H Outlet Dim Pipe Fix Dim Inlet Dim Dimension L W H Base Outlet Dim Pipe Fix Dim Inlet Dim
Hole Dim Hole Dim
G G L L G G Q Q L L
Model A B C D E F H I J K M N Model A B C P D S E F H I J K M N
(FI* ) (TI*) (4R) (6R) (FI* ) (TI*) (4R) (6R) (4R) (6R)
DDW020H 900 960 600 300 265 191 366 462 256 158 82.5 137.5 808 460 1020 910 DDW100H 1690 1170 970 50 292 375 407 102 508 658 625 164 137 137 82.5 137.5 1598 790 1810 1120

DDW030H 1050 1000 650 333 292 286 393 512 320 158 82.5 137.5 958 510 1170 950 DDW120H 1690 1170 1085 50 292 375 407 102 508 658 752 164 137 137 82.5 137.5 1598 910 1810 1120

DDW040H 1080 1100 765 398 344 235 445 557 434 164 82.5 137.5 988 590 1200 1050 DDW150H 1940 1170 1215 50 292 375 407 223 508 658 863 172 150 137 110 137.5 1850 1040 2060 1120

DDW050H 1250 1060 765 398 344 319 445 574 434 164 82.5 137.5 1158 625 1390 1010 DDW180H 2120 1310 1275 50 341 432 481 165 586 785 926 172 150 137 110 137.5 2028 1100 2240 1260

DDW060H 1320 1150 839 473 407 324 508 646 498 164 82.5 137.5 1228 660 1440 1100 DDW200H 2300 1310 1275 50 456 559 481 107 586 805 926 172 150 137 110 137.5 2207 1100 2420 1260

DDW080H 1680 1150 839 473 407 530 508 646 498 164 82.5 137.5 1588 660 1800 1100 DDW250H 2400 1310 1465 50 456 559 481 111 586 805 1104 178 150 137 110 137.5 2307 1290 2520 1260

DDW300H 2766 1646 1549 63 450 569 569 277 772 891 1167 191 152 137 110 137.5 2683 1390 --- ---

DDW350H 2766 1646 1709 63 450 569 569 277 772 891 --- 185 152 138 110 137.5 2683 1550 --- ---

DDW400H 2926 1806 1869 63 500 638 638 271 841 1046 --- 185 152 138 110 137.5 2827 1710 --- ---
Note: Air outlets with dotted lines are for units with fan top outlet.
DDW450H 2926 1806 2029 63 500 638 638 271 841 1046 --- 185 152 138 110 137.5 2827 1870 --- ---
FI* and TI* means the fan discharge arrangement.
32
3. Single-fan Vertical Unit 4. Double-fan Vertical Unit
J

137
J

LQ
40
D G E F

40
D N D G E F

Water Outlet
Water Outlet
Air Vent
Air Vent

C
H
H

K
K
Water Inlet
Water Inlet

63
63

I
I

A 90 B
A 90 B
Condensation Pipe R1-1/4
Condensation Pipe R1-1/4

Table 3 Unit: mm Table 4 Unit: mm

Dimension L W H Outlet Dim Pipe Fix Dim Inlet Dim Dimension L W H Outlet Dim Pipe Fix Dim Inlet Dim
L L Q Q L L
Model A B C D E F G H I J K Model A B C D E F G N H I J K
(4R) (6R) (4R) (6R) (4R) (6R)
DDW040V 980 650 1346 333 292 143 197 498 164 82.5 137.5 888 655
DDW150V 2090 900 1746 473 407 152 595 384 736 172 151 137 110 137.5 1997 902
DDW050V 1140 650 1403 398 344 79 262 498 164 82.5 137.5 1048 687
DDW180V 2240 900 1978 432 481 109 768 341 863 172 151 137 110 137.5 2147 1035
DDW060V 1210 650 1460 398 344 79 332 561 164 82.5 137.5 1118 740 DDW200V 2320 900 2048 559 481 111 606 456 926 172 151 137 110 137.5 2227 1109
DDW080V 1320 810 1673 473 407 85 330 688 164 82.5 137.5 1228 842 DDW250V 2670 900 2108 559 481 87 829 456 977 178 151 137 110 137.5 2577 1155
DDW100V 1390 900 1933 559 481 111 257 815 164 82.5 137.5 1397 1014
DDW300V 2766 1006 2555 569 569 131 900 450 1167 150 111 97 110 137.5 2683 1390
DDW120V 1530 900 2010 559 481 114 332 879 164 82.5 137.5 1437 1070
DDW350V 2766 1006 2715 569 569 131 900 450 --- 144 111 97 110 137.5 2667 1550
DDW400V 2926 1166 3035 638 638 171 883 500 --- 144 111 97 110 137.5 2827 1710
DDW450V 2926 1166 3195 638 638 171 874 500 --- 144 111 97 110 137.5 2827 1870
 33

Appendix 3: Dimensions For FUW-H/V Unit

1. Horizontal Unit
44 J
2. Single-fan Vertical Unit

55
F D

30

82
L
R

E
N

N
Hanging Holes 4-φ12

F S D S J
B 26 M
M-50 Air Vent Terminal Box Water Inlet Water Outlet

38
M

K
C

E
G
Terminal Box
I
35

Condensation Pipe R1-1/4

Q

X A 50

C
Table 1 Water Outlet

K
Water Inlet
Unit: mm

145
81
Dimension L W H Outlet Dim Pipe Fix Dim Inlet Dim Hanging Hole Dim
G T L 78 A
B 50
Model A B C D S E F G X H I T L(4R) L(6R) J K Q R M N R
Condensation Pipe R1-1/4

FUW020H 950 800 468 - 238 265 170 326 30 294 118 266 66 110 680 393 25 198 940 554

FUW030H 950 1040 468 - 302 265 313 326 30 294 118 266 66 110 920 393 25 198 1180 554 Table 2 Unit: mm
FUW040H 950 1300 468 180 235 265 244 326 40 294 118 266 66 110 1180 393 25 198 1440 554
Hanging
Dimension L W H Outlet Dim Pipe Fix Dim Inlet Dim Length
FUW050H 950 1550 468 238 301 265 244 326 40 294 118 266 66 110 1430 393 25 198 1690 554 Hole Dim

FUW060H 950 1800 468 238 301 265 367 326 40 294 118 266 66 110 1680 393 25 198 1940 554 Model A B C D E F H G L(4R) L(6R) T(4R) T(6R) J K R M N

FUW080H 1000 1800 606 242 311 343 349 407 40 392 118 303 138 138 1696 538 35 132 1940 755 FUW040V 935 585 1082 335 293 200 446 182 66 110 236 192 840 592 1055 968 520

FUW100H 1000 2180 606 242 311 343 658 407 40 392 118 303 138 138 2076 533 35 132 2320 755 FUW050V 1135 655 1320 395 341 254 546 152 66 110 326 282 1040 692 1255 1168 590

FUW120H 1050 2270 697 291 376 407 614 469 40 456 118 303 138 138 2164 612 35 132 2410 848 FUW060V 1135 655 1320 395 341 254 546 152 66 110 326 282 1040 692 1255 1168 590

FUW150H 1050 2490 723 381 474 407 580 470 40 519 118 303 138 138 2386 648 35 132 2630 848 Note: Upward table “4R” means 4 rows and “6R” means 6 rows.
Note: Upward table “4R” means 4 rows and “6R” means 6 rows.
If D value is“-”means single-fan unit which only has one outlet.
34
3. Single-fan Vertical Unit 4. Double-fan Vertical Unit
F D

102
225 S D S

105
24

24
E

E
N

N
J 1980
20 M 25 M
44

Terminal Box
Terminal Box

Water Outlet
C

C
Water Outlet
H

K
Water Inlet Water Inlet
269

269
189

176
G T L P 200 Q 200 P 482 T L P 200 Q 200
B 50 A 83 B 50 A 72
R
Condensation Pipe R1-1/4
R
Condensation Pipe R1-1/4

Table 3 Unit: mm Table 4 Unit: mm

Dimension L W H Outlet Dim Pipe Fix Dim Inlet Dim Length Base Dimension L W H Outlet Dim Pipe Fix Dim Inlet Dim Length Base

L L T T L L T T
Model A B C D E F H G J K R M N P Q Model A B C S D E H J K L M N P Q
(4R) (6R) (4R) (6R) (4R) (6R) (4R) (6R)

FUW080V 1350 736 1676 471 404 281 720 182 83 137 343 288 1256 873 1493 1400 675 197 500 FUW180V 2124 955 2070 476 382 406 1077 83 137 224 180 2032 1253 2247 2175 907 334 1003

FUW100V 1350 736 1676 471 404 281 720 182 83 137 343 288 1256 873 1493 1400 675 197 500 FUW200V 2124 955 2070 476 382 406 1077 83 137 224 180 2032 1253 2247 2175 907 334 1003
FUW120V 1774 956 2036 561 482 483 950 480 83 137 228 184 1680 1112 1902 1826 907 334 655 FUW250V 2476 955 2191 561 454 478 1077 83 137 224 180 2379 1253 2597 2525 907 660 701
FUW150V 1774 956 2036 561 482 483 950 480 83 137 228 184 1680 1112 1902 1826 907 334 655
Note: Upward table “4R” means 4 rows and “6R” means 6 rows.
Note: Upward table “4R” means 4 rows and “6R” means 6 rows.
 35

Appendix 4: Dimensions For FUW-A Unit

Table 1 Unit: mm Table 2 Unit: mm

Dimension W Inlet Dim Outlet Dim Hanging Hole Dim Dimension W Inlet Dim Outlet Dim Hanging Hole Dim

Model A B C D Model A B C D E

FUW015A 750 540 235 667 FUW030A 1220 1010 265 170 1137

FUW020A 910 700 315 827 FUW035A 1370 1160 320 210 1287

FUW025A 1070 860 395 987 FUW040A 1520 1310 330 340 1437

FUW050A 1850 1640 395 540 1767

36
While utmost care is taken in ensuring that all details in the publication are correct at the time of going to
press, we are constantly striving for improvement and therefore reserve the right to alter model
specifications and equipment without notice. Details of specifications and equipment are also subject to
change to suit local conditions and requirements and not all models are available in every market.