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OPERATION
23
ENGLISH
Front desk control
When the pair wire is connected to the connector FD2 and FD1, the unit can be turned ON or OFF with a
switch located at the Front Desk Control panel. When the front desk switch is ON, the fan operates according
to the setting without working compressor and heater. When the front desk switch is OFF, the unit can operate
according to the setting of controls.
(Molex Housing Spec 396-06V)
Remote wall thermostat
When the wires are connected, the unit will be controlled by a remote wall thermostat.
The thermostat connections supply the 24 Volt AC.
When you install the digital/electronic thermostat, you must set it to 24 Volt AC.
(Molex Housing Spec 396-07V)
NOTICE
For wiring connection of Wall Thermostat, check the Installation instruction or Installation manual’s provided by
Thermostat Company.
Wire # AWG Maximum Length
#22 600 ft (180 m)
#20 900 ft (270 m)
#18 1500 ft (450 m)
#16 2000 ft (610 m)
FD2 FD1 DR2 DR1 MS2 MS1
Front Desk Control
Front Desk Control
GL GH O W Y R C
Low Fan
High Fan
Reversing Valve
Heater
Compressor
24 Volt-L
24 Volt-N
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