Installing A New Compressor - Electrolux E32AR75FPS Technical & Service Manual

Installing a New Compressor

Entirely new compressors have been developed
for use with R-134a and Ester oil refrigeration
systems. Both compressor and electric motor
have been modified. Old compressors intended
for R-12 refrigerant must not be used for new
systems charged with R-134a.
Replacement of compressor and installation of filter-drier
must be done in a continuous sequence so the system is
exposed to atmosphere no longer than necessary.
All replacement compressors are shipped with rubber
plugs in the suction, discharge and process tubes, and
contain the correct oil charge and a holding charge of
inert gas. Compressors have a low-side process tube
attached to the compressor shell. A high-side process
tube is attached to the filter-drier.
Replacement compressors for some units may have an
oil cooler even if the original compressor did not. If the
product is not equipped for an oil cooler, leave the plastic
caps in place and install the compressor, connecting
only to the suction and discharge lines of the new
compressor.
Before installing the replacement compressor, remove
the discharge plug and check for the pop sound of the
inert gas leaving the compressor.
DO NOT use compressor if you do not hear this
sound.
If the compressor checks OK, reinstall the plug. Do not
remove any of the plugs again until the compressor is in
position and you are ready to braze the lines.
A new compressor which is cold (e.g. after having been
kept in a cold service van) should be left to warm to the
surrounding temperature before the plugs on the
compressor connections are removed. This will help
prevent condensation from forming in the oil and the
compressor. Also, avoid opening the system when any
of the components or lines are cold.
A process tube is connected onto the high-side process
tube of the filter drier. This tube is located at the top of
the filter-drier.
DO NOT OPERATE RECIPROCATING
COMPRESSORS WHEN CHARGING LIQUID
REFRIGERANT INTO SYSTEM THROUGH ITS
PROCESS TUBE.
To replace the compressor:
1. Pull unit from its installation position and unplug from
wall outlet.
2. Extract the screws securing the compressor shield to
the unit frame and remove from unit.
3. Attach an approved self tapping line tap valve to the
process tube. Connect refrigerant recovery system
to tap valve. Turn on recovery system, open the
line tap valve, and allow refrigerant to flow into an
approved tank.
4. Using a 7/16" socket, remove the (4) bolts, one in
each corner, holding the compressor to the base.
5. Disconnect electrical leads from compressor.
6. After refrigerant is completely recovered, cut suction
and discharge lines as close to compressor as
possible. Leave only enough tubing to pinch off and
seal defective compressor. Plug or tape any open
system tubing to avoid entrance of moisture and air
into system. Remove inoperable compressor and
transfer mounting parts to new compressor.
7. Release holding charge (release slowly to avoid oil
discharge) on new compressor to ensure there is
no leak in seam or tubing. Reinstall rubber plug.
8. Install new compressor in exact same manner as
original compressor.
If low-side process tube is too short, silver solder
four inch piece of tubing onto process tube at this
time.
9. Reform both suction and discharge lines to align
with new compressor. If they are too short, use
additional lengths of tubing. Joints should overlap
0.5" to provide sufficient area for good solder joints.
Clean and mark area where tubing should be cut.
Cut tubing with tubing cutter. Work quickly to avoid
letting moisture and air into system.
On R-134a systems, compressor must NOT be left
open to atmosphere for more than 10 minutes to
prevent moisture contamination of oil.
5-9
Sealed System