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Table 8 — Recommended Thermostat
THERMOSTAT NO.
SUBBASE NO.
Type
Display — °F
2 Cooling Stages
2 Heating Stages
Auto Changeover
Fan Switch
Emergency Heat
*Subbase has ON-AUTO fan switch.
Fig. 10 — Field Wiring Diagram, 541A120 or 180 System with
Standard Thermostat and Electric Heat
HH621606 (°F)
HH93AZ177*
Standard
X
X
X
X*
X
—
—
11
LEGEND
EQUIP — Equipment
GND
— Ground
HC
— Heater Contactor
IFC
— Indoor Fan Contactor
IFM
— Indoor Fan Motor
NEC
— National Electrical Code
TB
— Terminal Block
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