White Rodgers 1F92-71 Check Thermostat Operation, Fan Operation, Heating System

5. Economizer — 1st stage cooling

			When using economizer with
W1		Y2	single stage heat pump, field
			jumper W1 & Y2
			Switch #1 (see steps 1-4)
ON
			Switch #2 (see steps 1-4)
			Switch #3 ON
1 2	3 4		Switch #4 (see step 6)

6.Automatic Changeover from Heat to Cool

ON	Switch #1 (see steps 1-4)
	Switch #2 (see steps 1-4)
	Switch #3 (see step 5)
1 2 3 4	Switch #4 ON

NOTE

The battery maintains the stored program in the event of a power failure. When attached to the wall with 24vAC power applied, the thermostat will function normally with- out the battery. However, the program will be lost in the event of power interruption or failure if the battery is not installed. When power is restored, the thermostat will automatically maintain a temperature of 64°F or a cooling temperature of 82°F (factory preprogrammed) as needed.

CHECK THERMOSTAT OPERATION

NOTE

When checking thermostat, option switch #4 for auto- matic changeover must be in the OFF position. This will allow temporary setting of heat set points above cool settings. After system checkout, reset option switch to ON position if automatic changeover is desired (see SET OPTION SWITCHES).

FAN OPERATION

1.Turn on power to the system. If the auxiliary heat source has a standing pilot, be sure to light it.

2.	Press	FAN	until FAN	is displayed. The blower
		SWITCH
	should begin to operate.
3.	Press	FAN	until FAN	is displayed. The blower
		SWITCH

should stop operating within approximately one minute.

HEATING SYSTEM

1. Press	SYSTEM	until HEAT is displayed. (It may
	SWITCH

already be displayed.)

LOCKOUT BYPASS OPTION

!CAUTION

FOR QUALIFIED SERVICE TECHNICIANS’ USE ONLY. OPERATORS SHOULD NOT USE THIS FEATURE DUE TO POSSIBILITY OF EQUIPMENT OR PROPERTY DAMAGE, OR PERSONAL INJURY.

DO NOT USE THE LOCKOUT BYPASS OPTION UNLESS THE COMPRESSOR OIL HEATERS HAVE BEEN OPERATIONAL FOR 6 HOURS AND THE SYSTEM HAS NOT BEEN OPERATIONAL FOR AT LEAST 5 MINUTES.

COMPRESSOR LONG TERM CYCLE

PROTECTION

To protect the compressor from potential damage due to temperature change of crankcase oil, this thermo- stat has a built-in time delay of one hour less than the power loss to the unit (up to 12 hours maximum lockout). During this time, auxiliary heat will be used when necessary to maintain setpoint temperature. DO NOT attempt to override this delay feature before crankcase temperature has stabilized (for example, if power has been out for three hours, the compressor should remain locked out for two hours).

COMPRESSOR SHORT TERM CYCLE

PROTECTION

This thermostat has a built-in short term (5-minute) time delay. During this 5-minute period, the thermo- stat will lock out the compressor to allow head pres- sure to stabilize. If you want to override this feature

while testing thermostat operation, simply press PRGMADV and HOLDTEMP at the same time at initial startup.

2.Press to adjust thermostat to 99°F. All stages of the heating system should come on within approxi- mately five minutes. However, if the PUMP LED is flashing, the compressor lockout feature is operating (see Lockout Bypass Option to temporarily over- ride the compressor lockout feature during testing).

3. Press	SYSTEM	until EMER is displayed. Repeat step
	SWITCH
2.

4.To program the thermostat, see OPERATION GUIDE. (Instructions continue on next page)

7