5-2
(2) Devices and schematic wiring diagram
1) Devices
Device
Location
Temperature recorder board
In the temperature recorder box
Recorder return air sensor (RRS)
Evaporator suction area
Recorder supply air sensor (RSS)
Evaporator discharge area
2) Schematic wiring diagram
(3) Checking (Calibration) of the indicated
value on the recorder (optional)
This recorder can be checked for its
switching function for recording sensors and
temperature indication function regardless
of inside temperature, and can be adjusted.
1) Switching function for recording sensors
By operating the set temperature on the
controller, the temperature recorder
automatically switches the recording sensors,
return air sensor (for frozen and partial frozen
modes) and supply air sensor (for chilled mode)
Set temperature (˚C)
Recording sensor
–30.0 to –3.0
Return air sensor
–2.9 to 25.0
Supply air sensor
TB1
RRS (BLU)
RSS (G)
CN1
Recorder
return air
sensor
Recorder
supply air
sensor
6
1
6
1
Controller
2) Calibration function
r
Replace the temperature recorder board.
t
After replacement, be sure to check the
wiring and operation.
Notes: 1. The pen is adjusted to suit to the
PSD-217C (REV.A) recording chart
paper or its equivalent.
Do not use the recording charts
other than ones mentioned above.
2. Do not change the position of pen
during transportation.
3. When the power is supplied, the
pen vibrates momentarily and will
return to its original position due to
the recording characteristics, but
this is not a sign of trouble.
(4) Replacement of temperature recorder
q
Turn off the circuit breaker.
w
Remove the wiring connector and
sensors from the back of the temperature
recorder.
e
Remove the hinge on the bottom and the
speed bolts on the top.
INC.
OFF.
ADJ.
DEC.
Calibration switch
q
Calibration switch
w
Battery check button
Speed bolt
Hinge
INC : To increase
temperature figure
DEC : To decrease
temperature figure
CAUTION
During the indoor temperature is stable, recording
temperature is adjustable by changing the pen
position using the calibration switch. Do not move
the temperature recording pen manually.
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