Honeywell PC8900A Manual page 10

CO MONITOR
2
4
PC8900
1
2
3
4
6
1
L2
L1
(HOT)
SYSTEM
TRANSFORMER
3 HUMIDIFIER
OR DEHUMIDIFIER
EQUIPMENT
VENTILATION
5
EQUIPMENT
Fig. 12. Hookup diagram for 1-stage or 2-stage heating and cooling in conventional system with single transformer.
68-0173—3
W8900A,C
CO
2
1
7
2
3
4
GND
C
2
R
RH
RC
HUM
HUM
VNT
VNT
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2 JUMPER R TO RH TO RC FOR SINGLE TRANSFORMER APPLICATIONS.
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
SEE VENTILATION INSTRUCTIONS FOR WIRING.
6
GROUNDING THE GND TERMINAL IS NOT RECOMMENDED.
7
CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE.
10
C7189A REMOTE AIR
TEMPERATURE SENSOR
C7100 DISCHARGE AIR
TEMPERATURE SENSOR
S1
S
T1
T
OUT
OUT
FAN RELAY
LED
STAGE 2
COOL RELAY
G
STAGE 1
Y2
COOL RELAY
Y1
STAGE 1
W1
HEAT RELAY
W2
STAGE 2
HEAT RELAY
2
C7089A OUTDOOR AIR
TEMPERATURE SENSOR
M4478D