Airxcel 8000 SERIES Service Manual

5
I. BASIC COMPONENTS
Compressor
The compressor is called a hermetic compressor which
means that it is completely sealed (welded together). It is,
therefore, not internally field serviceable. Inside the
compressor housing is an electric motor which drives the
compressor.
Mounted on the outside of the compressor housing is a
two-terminal overload switch. Note: We have a few
models with internal overloads that are non-serviceable.
The switch is connected in series with the common
terminal, so if the switch opens, it will cut the power to the
compressor motor. The switch will open as the result of
either heat or amperage conditions that could be harmful to
the compressor.
Condenser Coil
The purpose of the finned condenser coil is to transfer heat
from the high pressure refrigerant to the warm outdoor air.
As the outdoor air passes over the coil, the heat transfer
will cause the air temperature to rise. Thus the condenser
discharge air will be several degrees warmer than the
condenser entering air.
Metering Device
The refrigerant enters the cap tube from the condenser as a
warm high pressure liquid. As the refrigerant flows
through the small diameter cap tube, the pressure drops
rather rapidly. The liquid temperature is constantly
lowered as it passes through the cap tube. As the
refrigerant leaves the cap tube, it is still mostly liquid;
however, a small portion has changed to a vapor called
flash gas. When the liquid refrigerant passes from the cap
tube to the evaporator, it is at low side pressure and will
therefore vaporize at low temperature as it picks up heat
from the air being conditioned.
Evaporator Coil
The purpose of the finned evaporator coil is to transfer the
heat from the warm and moist indoor air to the cold low
pressure refrigerant.
II. AIR HANDLING
Fan Motor
The air conditioning unit has one double end shaft fan
motor. On one shaft is mounted a centrifugal or squirrel
cage blower which draws air (return air) out of the
recreational vehicle and blows the conditioned air down
into the recreational vehicle. On the other end is mounted
an axial flow or propeller type fan which circulates
outdoor air through the condenser coil.
* Some models use a squirrel cage on both ends of
the motor.
An important step in installing a replacement fan motor is
to check the direction of rotation before it is installed. On
all models, the condenser fan pulls the air through the coil.
Fan Motor Check Procedure
If a fan motor refuses to perform properly, it can be
checked in the following manner:
1. Be sure the motor leads are connected
properly.
a) The black wire from the motor connects
to a black wire inside a wire nut then the
black wire connects through the
disconnect plug to the selector
switch. The red wire from the
motor connects to a red wire in
a wire nut then the red wire
connects through the disconnect
plug to the selector switch.
b) The white wire from the motor
connects to the fan capacitor or
a white wire in a wire nut then
the white wire connects through
the disconnect plug to the
thermostat.
c) The brown wires from the
motor connect to the fan
capacitor.

Airxcel 8000 SERIES Specifications

General

Brand	Airxcel
Model	8000 SERIES
Category	Air Conditioner
Language	English