WIRING DIAGRAM NOTES:
1.BRYANT THERMOSTAT WIRING DIAGRAMS ARE ONLY ACCURATE FOR MODEL NUMBERS BEGINNING WITH TSTAT _ _ _ _ _ _ _.
2.WIRING MUST CONFORM TO NEC OR LOCAL CODES.
3.SOME UNITS ARE EQUIPPED WITH PRESSURE SWITCH(ES), TEMPERATURE SWITCH, OR
4.A
5.THERMOSTATS ARE FACTORY CONFIGURED WITH
6.TO STAGE ELECTRIC RESISTANCE HEAT, CONSULT OUTDOOR THERMOSTAT INSTALLATION INSTRUC- TIONS.
7.FOR DUAL FUEL THERMOSTATS, UNDERLINED LETTER ON DUAL TERMINAL INDICATES ITS USAGE.
FOR EXAMPLE: O/W2 MEANS O
O/W2 MEANS W2
OUTDOOR TEMPERATURE SENSOR MUST BE ATTACHED IN ALL DUAL FUEL INSTALLATIONS.
JUMPER WIRE BETWEEN O/W2 AND L THERMOSTAT TERMINALS MUST BE PRESENT.
8.Y1 AND O CONNECTIONS TO
LEGEND
24 VOLT FACTORY WIRING
24 VOLT FIELD WIRING FIELD SPLICE CONNECTION
ODT
EHR
SHR
OUTDOOR THERMOSTAT EMERGENCY HEAT RELAY SUPPLEMENTAL HEAT RELAY
A97413
providing electrical potential to second heater sequencer (if used). If outdoor temperature falls below setting of outdoor thermostat
When thermostat is satisfied, its contacts open,
DEFROST
The defrost control is a time/temperature control which includes a
The electronic timer and defrost cycle start only when contactor is energized and defrost thermostat is closed.
Defrost mode is identical to cooling mode except that outdoor fan motor stops and
To initiate defrost, the defrost thermostat must be closed. This can be accomplished as follows:
1.Turn off power to outdoor unit.
2.Disconnect outdoor fan motor lead from OF2 on control board. (See Fig. 15.) Tape lead to prevent grounding.
3.Restart unit in heating mode, allowing frost to accumulate on outdoor coil.
4.After a few minutes in heating mode, liquid line tempera- ture should drop below closing point of defrost thermostat (approximately 30ÊF).
5.Short between
6.When you hear reversing valve change position, remove screwdriver immediately; otherwise, control will terminate normal
NOTE: Length of defrost cycle is dependent on the length of time it takes to remove screwdriver from test pins after reversing valve has shifted.
7.Unit will remain in defrost for remainder of defrost cycle time or until defrost thermostat reopens at approximately 80ÊF coil temperature of liquid line.
8.Turn off power to outdoor unit and reconnect fan motor lead to OF2 on control board. (See Fig. 15.)
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