Honeywell PC8900A Manual page 17

CO MONITOR
2
COMPRESSOR
MONITOR
PC8900
1
2
3
4
8
1
L2
L1
(HOT)
SYSTEM
TRANSFORMER
HUMIDIFIER OR
3
DEHUMIDIFIER
EQUIPMENT
VENTILATION
7
EQUIPMENT
Fig. 19. Hookup diagram for heat pump application requiring separate Y1 and W1 terminals with cooling changeover.
4
W8900B
CO
2
L
1
2
3
4
GND
C
R
2
RH
HUM
HUM
VNT
VNT
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
JUMPER R TO RH.
3
DURING INSTALLER SETUP, CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE
(HUMIDIFIER) OR COOLING MODE (DEHUMIDIFIER).
4 W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS.
5
CONNECT COOLING CHANGEOVER VALVE TO R8222N1011 AND CONFIGURE PC8900 FOR
CHANGEOVER IN COOLING MODE.
6
CONNECT G, Y2, E, AUX, AND W2 TERMINALS AS REQUIRED.
7 SEE VENTILATION INSTRUCTIONS FOR WIRING.
8 GROUNDING THE GND TERMINAL IS NOT RECOMMENDED.
CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE.
9
C7189A REMOTE AIR
TEMPERATURE SENSOR
S1
S
T1
T
OUT
OUT
9
LED
R8222N1011
5
O/B
G
Y2
1
Y1/W1
E
AUX
6
W2
4
2
17
C7100 DISCHARGE AIR
TEMPERATURE SENSOR
C7089A OUTDOOR AIR
TEMPERATURE SENSOR
STAGE 1 COOL RELAY
3
STAGE 1 HEAT RELAY
2
COOL
CHANGEOVER VALVE
6
M4487D
68-0173—3