Bard PH1230, PH1236, PH1224 installation instructions Thermostats

THERMOSTATS

See specific wiring information for the different models, heater KWs, and voltages.

TABLE 7

HEAT PUMP THERMOSTATS

THERMOSTAT	SUBBASE		DESCRIPTION
8403-045	Part of	1 stage cool, 2 stage heat; Mecury bulb; Manual changeover
		Fan Switch: Auto-On;	System Switch: Em Heat-Heat-Off-Cool
(T841A1761)	Thermostat
		Indicating Lamps: Check-Em Heat-Aux Heat
8403-017	8404-009	1 stage cool, 2 stage heat; Mercury bulb; Manual changeover		Q
		Fan Switch: Auto-On;	System Switch: Em Heat-Heat-Off-Cool
(T874R1129)	Q674L1181
		Indicating Lamps: Check-Em Heat
8403-018	8404-010	1 stage cool, 2 stage heat; Mercury bulb; Auto changeover
		Fan Switch: Auto-On;	System Switch: Off-Em Heat-Heat-Auto-Cool	R
(T874N1024)	Q674F1261
		Indicating Lamps: Check-Em Heat
		1 stage cool, 2 stage heat; Digital non-programmable (no battery required)
8403-042	Part of	Automatic or manual changeover
(T8511G1070)	Thermostat	Fan Switch: Auto-On;	System Switch: Off-Em Heat-Auto or Cool/Heat
		Indicating Lamps: Check Display Indication: Em Heat-Aux Heat
		2 stage cool, 2 stage heat; Digital programmable (7 day); Battery backup
8403-034	Part of	Automatic or manual changeover; 1 set-up/set-back period per 24 hours
		Programmable ventilation terminal for economizer or energy recovery
(1F94-80)	Thermostat
		Fan Switch: Auto-On;	System Switch: Off-Em Heat-Auto or Cool/Heat
		Indicating Lamps: Emer-Pump-Malf-Aux
		2 stage cool, 3 stage heat; Digital proframmable (5day/2day); Battery backup
8403-027	Part of	Automatic or manual changeover: 4 set-ups/set-back periods per 24 hours
(1F92-71)	Thermostat	Fan Switch: Auto-On;	System Switch: Off-Em Heat-Auto or Cool/Heat
		Indicating Lamps: Emer-Pump-Malf-Aux

QNo automatic changeover position – must be manually placed in heat or cool. Reversing valve remains energized at all times system switch is in heat position (except during defrost cycle). No pressure equalization noise when thermostat is satisfied on either heating or cooling.

RAllows thermostat to control both heating and cooling operation when set in “AUTO” position. Reversing valve de- energizes at end of each “ON” heating cycle.

Manual 2100-344 Page 10