8-3. Heating
8-3-1. Room Temperature Control
●Room temperature control is obtained by cycling the compressor ON and OFF under control of the room temperature sensor in the indoor unit.
●All information is transmitted every 3 minutes by the remote control unit to the controller in the indoor unit.
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| Thermo. |
| Thermo. | |
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| Thermo. | OFF |
| OFF | |
Set temp. |
| ON |
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| Thermo. | |
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| ON | |||
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T+2°F |
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T+1°F |
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More than |
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3 minutes | 3 minutes | 3 minutes | ||||
3 minutes | ||||||
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Compressor | OFF |
| OFF |
| OFF | |
Combustion | OFF |
| OFF |
| OFF | |
Reversing | OFF |
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valve coil |
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| 30 |
| 30 | |
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| sec. | |
Indoor fan | OFF LL | Set | LL | Set speed | ||
speed | ||||||
Indoor heat exch. coil temp.
113°F (45°C)
90°F (32°C)
Operation button OFF
●The control circuit will not attempt to turn the compressor ON until the compressor has been OFF for at least 3 minutes. To protect the compressor from stalling out when trying to start against the high side refrigerant pressure, the control circuit has a
●As a protective measure, the control circuit switches the compressor OFF after 3 minutes or more of com- pressor operation.
●Thermo. ON: When the room temperature is below T + 1°F (T°F is set temperature).
Compressor ➔ ON
●Thermo. OFF: When the room temperature is equal to or below set temperature T + 2°F. Compressor ➔ OFF
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