4.Set room thermostat to desired temperature. Be sure set point is below
5.Set room thermostat to HEAT or COOL and fan control to ON or AUTO mode, as desired. Operate unit for 15 minutes. Check
SEQUENCE OF OPERATION
NOTE:
With power supplied to indoor and outdoor units, transformer is energized.
COOLING
On a call for cooling, thermostat makes circuits
When thermostat is satisfied, its contacts open,
NOTE: If indoor unit is equipped with a
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
To initiate defrost, the defrost thermostat must be closed. This can be accomplished as follows:
1.Turn off power to outdoor unit.
2.Disconnect
HP THERMOSTAT
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24 VAC HOT |
| R |
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24 VAC COM |
| C |
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HEAT STAGE 2 |
| W2 |
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COOL/HEAT |
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| Y |
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STAGE 1 |
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INDOOR FAN |
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| G |
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RVS COOLING |
| O |
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EMERGENCY |
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HEAT |
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TYPICAL | HEAT | |
FAN COIL | PUMP | |
R | R | |
C | C | |
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W2 * | W2 | |
E * | ||
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W3 * | Y | |
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G |
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| O |
*IF AVAILABLE
Fig. 9—Generic Wiring Diagram
A02325
(See Thermostat Installation Instructions for wiring specific unit combinations.)
LEGEND
FIELD SPLICE CONNECTION
ODT
| OUTDOOR THERMOSTAT |
EHR | EMERGENCY HEAT RELAY |
SHR | SUPPLEMENTAL HEAT RELAY |
A97413
HEATING
On a call for heating, thermostat makes circuits
Should temperature continue to fall,
3.Restart unit in heating mode, allowing frost to accumulate on outdoor coil.
4.After a few minutes in heating mode,
5.Short between
6