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Board ID
E12
E16
E18
E21 and E22
E31 and E32
E24 and E25
E26
E27
E28
E30
E33
W1
* Factory default setting
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Table 3. Main Control Jumpers and Terminals
Label
Description
PSC Fan
240 VAC output connection for outdoor fan.
PSC Fan
240 VAC input connection for outdoor fan.
W
24VAC output for defrost auxiliary heat output.
L
Thermostat service light connection.
Y2
24VAC thermostat input/output for second stage operation of the unit.
Y1
24VAC thermostat input for first stage operation of the unit.
O
24VAC thermostat input for reversing valve operation
DS
Humiditrol Input
C
24VAC system common
R
24VAC system power input
LO−PS
S4 connection for low−pressure switch (2.4 milliamps @ 18VAC)
Y1 OUT
24VAC common output, switched for enabling compressor contactor.
HS−PS
S87 connection for high−pressure switch.
First Stage and second stage basic and precision dehumidification ECM fan motor 24VDC out-
FAN 1
put connection 1.
Second stage basic and precision dehumidification ECM fan motor 24VDC output connection
FAN 2
2.
FAN C
ECM common connection for ECM fan.
Six position square pin header E30 provides connections for the temperature sensors.
DIS 5
Discharge line temperature sensor supply.
DIS (YELLOW)
DIS 6
Discharge line temperature sensor return.
Pins 5 and 6
Range is −35ºF to 310ºF. Sensor is clipped on a 1/2" copper tube.
AMB 3
Outdoor ambient temperature sensor supply.
AMB (BLACK)
AMB 4
Outdoor ambient temperature return.
Pins 3 and 4
Range is −40ºF to +140ºF
COIL 1
Outdoor coil temperature sensor supply.
COIL (BROWN)
COIL 2
Outdoor coil temperature sensor return
Pins 5 and 6
This model does not utilize a coil sensor. The cable harness assembly for the sensors
incorporates a built−in 10K resistor between pins 5 and 6.
This jumper allows service personnel to defeat the timed off control, and field programming of
Field Test
unit capacity feature. Placing a jumper across both pins on E33 will terminate the anti−short
delay. It will also clear lockout alarms
Short DS To R
Cut for Humiditrol
search engine
Enhanced Dehumidification Accessory (EDA) applications.
Page 23
XC17 SERIES
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