Wine Guardian Ducted Split Wine Cellar Cooling Systems (WGS175) - Manual - Manual (Page 39)

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Wiring

Wire the system as per the supplied wiring schematic found on pages 18 through
20 of this manual.

The fan coil unit is powered through a factory-supplied power cord, but you will
need to run 24 volt power wires from the two position terminal block to the field
installed enclosed contactor (in plastic housing) to be placed in the condensing
unit, or to somewhere adjacent that is easily accessible. This can be typical remote
interface controller wire or 18 gauge insulated wire. (see Fig.1 and 2 on the
following page)
Fig. 1
Fig. 2

The condensing unit needs to be hard-wired for the rated high voltage to be brought
to the field-installed contactor in enclosed plastic housing, from the load side (L1
& L2) of the contactor. Run a ground lead to be connected to the condensing unit
Ground lead at the compressor. The load side of the field installed contactor will
contain the power leads that are found under the condensing unit’s control box
cover.

Turn on power to the condensing unit 24 hours prior to system start-up to allow
crankcase heater to warm up compressor crankcase.
Refrigerant Charging
NOTE: The WGS40,.WGS75. WGS100 systems utilize a Headmaster control
valve to control head pressure at low ambient applications, therefore require a
specific initial charging procedure as outlined below. The wgs175 system does
not use this method of low ambient control (utilizes fan cycling), but can accept
initial charge into the liquid receiver port the same way and the system has the
same capacity.
。
24 volt two
position
terminal block Com ports
On/Off
switch
24 volt
contactor
enclosure