Holiday 2002 NEPTUNE, Owner'S Manual

Page: 141 / 344

Appliances
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The roof air conditioners operate from 120 Volts AC only. Operation is
controlled by a 12 Volt DC wall thermostat. The electronics in the wall thermostat
send a signal to the roof air conditioner’s circuit board. The circuit board controls
the desired roof air conditioner functions. The refrigeration process in the roof
air conditioner is similar to the dash air conditioning or a household type refrig-
erator, functioning as an enclosed system. The refrigeration process repeats in a
cycle. Refrigerant is drawn into the compressor and heated from compression.
High pressure vapor is sent to a condenser where the heat is expelled into the
atmosphere. The vapor leaves the condenser as a high pressure liquid. This liquid
is forced into a metered capillary tube and then into the evaporator or low
side pressure. The refrigerant changes from liquid form to a vapor as the heat
is extracted. The vapor is drawn back into the compressor to start the cycle
again.
NOTE: Air conditioning systems will freeze the moisture in
the air depending on the humidity content. Under high
humidity conditions it is recommended to leave the
HIGH/LOW switch to the HIGH position.
The roof air conditioner will operate only when the following needs
have been met:
• 120 Volts AC from either shore power or the generator is supplied.
• House batteries are charged.
Thermostat Operation:
The thermostat operates the roof air conditioner and the furnace.
Operation
AIR CONDITIONER
- ROOF
OM050235B