Sanyo DHX4852 - Manual (Page 52)

3-4
Control of W-2 WAY ECO-i SYSTEM
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1. Main Operating Functions
1-2. Automatic Control for Heating and Cooling
Automatic Heating/Cooling Control
(1) When operation starts, heating or cooling is selected according to the set temperature and the room temperature.
Room temperature Set temperature + 2 Cooling
Set temperature – 2 < Room temperature Set temperature + 2 Monitoring mode (*1)
Room temperature < Set temperature – 2 Heating
*1: If the difference between the room temperature and set temperature is small when operation starts, the cooling
thermostat remains in standby status (OFF) until the temperature difference increases. When the temperature differ-
ence increases, either cooling operation or heating operation is selected. This standby status is known as “monitoring
mode.”
(2) After operation starts in the selected operating mode, the set temperature is automatically shifted by +4°F (cooling opera-
tion) or –4°F (heating operation).
Example: Temperature set on the remote controller is 68°F.
Selected operating mode Shifted set temp. Remote controller display
1 Cooling 72°F 68°F
2 Heating 64°F 68°F
(3) Operating mode changes (heating cooling, cooling heating) which occur during operation as a result of temperature
changes are handled as shown below.
Heating cooling: Room temperature Shifted set temperature (set temperature + 4°F) + 1°F
Cooling heating: Room temperature Shifted set temperature (set temperature – 4°F) – 2°F
Example: Temperature set on the remote controller is 68°F.
Operating mode change Shifted set temp.
1 Heating Cooling 68 + 4 + 1 = 73°F or higher (*2)
2 Cooling Heating 68 – 4 – 2 = 62°F or lower
*2: During heating operation when the body sensor is used, a temperature shift is applied to the intake temperature
detected by the sensor, in consideration for the difference in temperature at the top and bottom of the room. (Refer
to the “Room Temperature Control” item.) If this intake shift temperature is 8°F, then the heating cooling change
occurs when the temperature detected by the body sensor is 80°F or higher.
(4) Cooling (heating) operation does not change if the room temperature changes from area C A (or A C) within 10
minutes after the compressor turns OFF. (Monitoring mode is excepted.)
(5) When the heating/cooling change
occurs, the 4-way valve switches
approximately 30 to 50 seconds
after the compressor turns ON.
Shifted set temp
Shifted set temp
Selected operating mode
Selected operating mode
Remote controller display
–4 deg
–2 deg
+2 deg
+6 deg
+4 deg
+5 deg
–6 deg
Thermostat ON ON OFF ON OFF ON OFF ON ON OFF OFF
A
B
C
Heating Heating Cooling
TD831138-02_W-2WAY.indb 4 2007/07/26 14:31:11