The electro-pneumatic positioner, YT-1000R, is used for operation of shaft. Use the RA surface to turn it in counterclockwise(reverse action).

pneumatic rotary valve actuators by means of electrical controller or control 󰊲 Fasten the cam in the procedure of loosening the hexagonal nut with flange
systems with an analog output signal of DC 4 to 20mA or split ranges. first, setting the using actuator to the starting position and then setting the
cam reference line and the bearing contact point of span adjusting arm
1.STRUCTURES unit to the matching position.
󰊳 Do not apply the supply pressure when attaching the cam.
󰊴 When the positioner is shipped out, the cam is tightened to the shaft.
Be sure to firmly lock the cam to the lock nut.(tightening torque
2.0~2.5Nm (20~25kgf/cm).

2-4 Attaching procedure of opening degree indication plate

2. INSTALLATION 󰊱 Lock the cam and then adjust the zero point and span. Then fix the
2-1 Mounting on Actuator opening degree indication plate to the shaft using the M3 screw provided.Set
the opening degree indication plate to the state of attaching reference line.

3. PIPING CONNECTION

2-2 Connection with feedback

shaft Find clamping pin
on the main shaft's center
of YT-1000R and insert
connection bar into the
fork lever slot, so it can
be locked to the fork
lever spring. This sets
the alignment of the main
shaft and center of the
actuator stem. Bad
alignment of the main shaft and the actuator stem lowers YT-1000R's
durability due to the high force on the shaft.

2-3 Cam

󰊱 Pipeline should be emptied, and supply air should be clean and dry.
󰊲 YT-1000 series single acting type is set to use OUT1 port. OUT1 port
should be connected with supply pressure port from actuator.
󰊳 YT-1000 series double acting type can be changed depends on the
operation direction.

4. Wiring Connection
󰊱 Open the terminal box cover, and locate the poles and connect
them respectively. Make sure to fasten the connection.
󰊲 For explosion-proof type positioner, make sure that the fastener
bolts are securely fastened, seal tightly on the connection port, and
󰊱 Use the DA surface of cam to turn the actuator main shaft in clockwise the number of thread must be at least six and has to be water-proof.
(viewed from the positioner front cover side) at the time of input feedback 󰊳 There are spare bolts on terminal board.

YONUG TECH CO., LTD. http://www.ytc.co.kr

 5-4 Seat Adjuster
󰊱 Seat Adjuster is set according to the customer's request before the
positioner is delivered. Please do not adjust the Seat Adjuster unless
it is absolutely necessary.
󰊲 Seat Adjuster is used for double acting actuator and should be
adjusted when the pressure balance point must be changed.
󰊳 If the sensitivity of positioner is extremely poor due to the actuator
type of load condition, then turn the seat adjuster screw to clockwise.
If hunting occurs, then turn the seat adjuster screw counter-clockwise.
Ex dm IIB T5 Ex ia IIB T6
5-5 Pilot valve with output orifice
5. ADJUSTMENT 󰊱 If the size of actuator is too small relative to the flow rate, then
Check the following prior to the adjustment.
the positioner can have hunting. In order to prevent hunting, orifice
󰊱 The pipeline is properly connected with the pressure supply port and
can be adjusted.
OUT1 and OUT2 port.
󰊲 Output Orifice Types
󰊲 The wires poles and the ground cables are correctly connected.
󰊳 The actuator and positioner are tightly fastened. Volume of actuator Output orifice diameter Ordering NO.
󰊴 Auto/Manual Set has been tightened in clockwise direction. below 90 cm3 1.0 󰊱
󰊵 The span adjusting lever of internal feedback lever is attached to the 90 180 cm
3
2.0 󰊲
correct (Direct or Reverse) position. over 180 cm
3
None 󰊳
󰊶 Check face of cam and make sure the face showing is same as user's
󰊳 Remove the o-rings from OUT1 and OUT2 ports and insert appropriate
intended use.
orifice. After inserting orifice, place back the o-ring. Make sure that there
is no substance entering into the ports.
5-1 Zero Adjustment
󰊱 Set supply signal at 4mA or 20mA and rotate adjuster clockwise
or counter-clockwise.
󰊲 When single acting actuator with spring is used, please check if the
pressure level which is indicated on the positioner is same to the
supplied pressure level.

5-2 Span Adjustment

󰊱 Set supply signal at 4mA or 20mA and check the actuator's stroke. 󰊴 If hunting persists after inserting the orifice, please contact YTC or its
Adjust the span according to the difference. appropriate agent.
󰊲 After setting, check zero setting again. After setting zero point, confirm
the span point again. This step must be repeated until both points
are properly set.
6. Manufacturer Warranty
󰊳 Tighten lock screws after the setting. - For the safety, it is imperative to follow instructions in the manual.
It is not manufacturer's liability for any damages which caused by
users' negligences.
- It is not manufacturer's liability for any damages or accidents which
resulted by any alteration or modification of the product and parts. If
alteration or modification is necessary, please contact the manufacturer
directly.
- Manufacturer warrants the product from the date of original retail
<Zero Adjustment> <Span Adjustment> purchase of the product for one (1) year, except as otherwise stated.
- Manufacturer warranty will not cover the products that the product have
5-3 Auto/Manual Switch <A/M Switch> been subjected to abuse, accident, alteration, modification, tampering,
󰊱 A/M switch adjusts the valve negligence, misuse, faulty installation, lack of reasonable care, repair or
operation to automatic or manual.
service in any way that is not contemplated in the documentation for
When YT-1000L is produced, it is
the product, or if the model or serial number has been altered,
set as Auto. If user wants to set
tampered with, defaced or removed; damages that occurs in shipment,
as Manual, the setting can be
changed by rotating the switch due to act of God, failure due to power surge, and cosmetic damage.
counter-clockwise. Improper or incorrectly performed maintenance or report voids this
󰊲 If the setting is set as Manual, Limited Warranty.
the air pressure will be supplied to - For detailed warranty information, please contact the corresponding local
the actuator directly. After adjusting, always set the setting back to Auto. Young Tech Co., Ltd office or main office in South Korea.
󰊳 If OUT2 in single acting or double acting actuator is used, A/M Switch
will not operate.

YOUNG TECH CO., LTD. http://www.ytc.co.kr