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Manual 2100-447
Page 9
WALL THERMOSTATS
FOR HEAT PUMPS WITH ECONOMIZER
Thermostat Part 8403-027 (White Rodgers IF92-71)
Electronic Heat Pump Thermostat
2 Stage Cool / 3 Stage Heat
FOR AIR CONDITIONING WITH ECONOMIZER
Thermostat Part 8403-021 (Honeywell T874D1934)
Subbase Part 8404-012 (Honeywell Q674A1001)
2 Stage Cool / 2 Stage Heat
FIGURE 7
ECONOMIZER OPERATION
FOR SINGLE COMPRESSOR UNIT
MIS-1351