Comfort Stat CDT901 - Manual (Page 32)

CDT900 Series Touchscreen Programmable Thermostata
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED
2. FACTORY INSTALLED JUMPER.
3
．"O/B" TERMINAL SET TO CONTROL AS EITHER "O" OR "B" IN THE INSTALLER SETUP
4
．OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE
SEPARATE FROM THE THERMOSTAT CABLE
Fig. 18. Typical hookup of single-stage heat pump with no auxiliary/backup heat (1H/1
heat pump).
31
HEAT PUMP
S1 S2 C R RC W W2 Y2 Y G
S1 S2 C R RC E L Y2 Y G O/B AUX
OUTDOOR/INDOOR
TEMPERATURE
SENSOR
4
2
R C 1
CHANGEOVER
VALVE
COMPRESSOR
RELAY
FAN RELAY OPTIONAL
24VAC
COMMON
CONNECTION
3