Wine Guardian 24S025, User Manual

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Heating Coil Option
It is located between the evaporator coil and blower inside the transition duct. It contains the
heating element and high temperature limit switches. The heating coil is wired to work in con-
junction with the thermostat. Since the thermostat prevents the heating and cooling circuits from
being energized at the same time, no additional power wiring is needed. We do recommend using
the auto mode on the thermostat so it can switch from heating to cooling automatically. If using
either the heat or cool only mode, the thermostat will not switch automatically.
No additional maintenance is required for the heating coil. To test the heating coil operation, set
the thermostat on heat and set the temperature above the cellar temperature. The supply air
temperature should rise above the return air temperature by an amount shown in the specifica-
tions.
Low Ambient Option
The purpose of the Low Ambient Option is to protect the compressor and refrigerant system. It
has two distinct components, a crankcase heater to keep the oil in the compressor warm and
prevent slugging on system start-up and a head pressure control to cycle the condenswer fan on
and off automatically to maintain system head pressure.
To confirm that the system is working, feel the bottom of the heater when the compressor unit has
cycled off. When the unit starts, the condenser fan does not start at the same time as the compres-
sor. The condenser fan starts after the head pressure has built up. As the unit is running the
condenser fan cycles off and on while it holds the head pressure within a fixed range. The amount
of cycling (frequency and duration) depends on the air temperature. The colder the air, the more
frequenct the cycling and with a longer duration.
Maintenance Schedule
Monthly
(or quarterly depending on experience with individual cellar)
√
Check filter and drain trap – clean if needed
√
Check for noise or vibration
√
Check for short-cycling of the unit - a turning on and off of the compressor unit more
than 8 times/hour.
Yearly
(in addition to monthly)
√
Replace filters if worn or plugged beyond cleaning
√
Check evaporator and condenser coils for dirt – use a vacuum with a brush attach-
ment to clean the coils