Sample Wiring Diagrams - Source 1 S1-THEH21NS Owner's Manual

OWNER'S MANUAL

Sample Wiring Diagrams

4 Wire, 1 Stage Cooling, 1 Stage Heat-Heat Pump with O reversing valve.
Residential Heat Pumps, split systems & package units, with no auxiliary heat.
REVERSING VALVE
FAN
COMPRESSOR
POWER
*
Common wire is optional in all installations. If a common wire is not used the
thermostat must be powered by two AA alkaline batteries. These batteries
must be replaced (page 11) each year or when the Low Battery indicator is displayed
(page 3).
S1-THEH21NS
*
Common wire optional
C
R
Y
W
G
B
O
4 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.
Page 13