Main Functions SiUS04-702
24 Function and Control
1.5 Automatic Operation
Automatic Cooling / Heating Function (Heat Pump Only)
When the AUTO mode is selected with the remote controller, the microcomputer automatically
determines the operation mode from cooling and heating according to the room temperature and
setting temperature at the time of the operation startup, and automatically operates in that mode.
The unit automatically switches the operation mode to cooling or heating to maintain the room
temperature at the main unit setting temperature.
Detailed
Explanation of
the Function
1. Remote controller setting temperature is set as automatic cooling / heating setting temperature
(64 to 96°F).
2. Main unit setting temperature equals remote controller setting temperature.
3. Mode switching point are as follows.
Heating
→
Cooling switching point:
Room temperature
≥
Main unit setting temperature +
∆
4.5°F deg.
Cooling
→
Heating switching point:
Room temperature < Main unit setting temperature –
∆
4.5°F deg.
Thermostat ON / OFF point is the same as the ON / OFF point of cooling or heating
operation.
4. During initial operation
Room temperature
≥
Remote controller setting temperature: Cooling operation
Room temperature < Remote controller setting temperature: Heating operation
Ex: When the set point is 77°F
Cooling Operation
→
73.4°F: Thermostat OFF
→
72°F: Switch to Heating Operation
Heating Operation
→
79.7°F: Thermostat OFF
→
81.5°F: Switch to Cooling Operation
(R6973)
Setpoint – ∆3.6ºF
=Thermostat OFF
Setpoint + ∆2.7ºF
=Thermostat OFF
Heating Operation
Setpoint – ∆4.5ºF
Cooling Operation
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