4-6
OPTIONAL FUNCTION
(4.1 Indoor Unit)
4.1.4 Control by Field-Supplied Room Thermostat
In the case that a field-supplied room thermostat instead of the inlet thermistor of the indoor unit is used,
connect wires as shown below. The required parts are shown in Table 4.2.
Turn OFF the power source before setting the dip switch.
Table 4.2 Specifications on Required Components
NOTES:
1. When a field-supplied room thermostat is used, select the specified thermostat as below.
Contactor Load: DC24V 50 to 6 mA (*)
Differential: more than 1.5 degree
(*) Only for RPK (After Alteration): DC 12V
2. Do not use a thermostat utilizing mercury.
3. This function can be used together with “4.1.1 Remote Control ON/OFF Function”.
Operation
Cooling Operation: Compressor is ON by closing terminals 2 and 3 at CN3
Compressor is OFF by opening terminals 2 and 3 at CN3
Heating Operation: Compressor is ON by closing terminals 1 and 2 at CN3
Compressor is OFF by opening terminals 1 and 2 at CN3
2
Temperature
Increase
Thermostat
CN3
3
2
1
3
1
Indoor Unit PCB
3P Connector
1
Indoor Unit
Set No.3 at ON side.
ON
OFF
2 3 4 5 6 7 8
DSW2
Field-Supplied Room Thermostat
Component Manufacturer or Specifications
Thermostat Equivalent of YAMATAKE R7031P005, R7031Q005
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