Thermo King 914 724, Manual

Page: 63 / 111

Refrigeration Service Operations (Rev. 1/99)
53
4. Clean the suction line to a bright, polished condition.
Install the feeler bulb clamps and the feeler bulb on the
side of the suction line in its former position. The feeler
bulb must make good contact with the suction line or
operation will be faulty. Wrap the bulb with insulating
tape.
5. Pressurize the low side and test for leaks. If no leaks are
found, evacuate the low side.
Completely Wrap Bulb with Tape
Location of Expansion Valve Bulb
RECEIVER TANK
Removal
1. Remove the refrigerant charge.
2. Unsolder the refrigerant lines from the receiver tank.
3. Remove the nut from the top and bottom of the receiver
tank.
4. Remove the receiver tank.
Installation
1. Position the receiver tank in the unit and install the
mounting nuts.
2. Solder the refrigerant lines to the receiver tank.
3. Pressurize the refrigeration system and check for leaks.
4. If no leaks are found, evacuate the system.
5. Recharge the unit.
OIL SEPARATOR
Once installed, the oil separator unit requires no mainte-
nance. However, all connections to the separator and
throughout the refrigeration system should be checked on a
regular basis for leaks.
Oil Separator Kit Installation
For units which do not have oil separators, a kit is available
using flare connections for installing the oil separator. The
kit (PN 20-126) contains an oil separator, a mounting
clamp, clamp screws, an oil return hose with fittings, an
adapter, and two fittings for the discharge hose.
Installation Recommendations
1. Connect the oil separator in series with the compressor
discharge line. (Inlet end of oil separator is labeled IN.)
2. Mount the oil separator as close as possible to the
compressor.
3. The oil separator can be mounted horizontally or verti-
cally, but the oil outlet MUST be at the lowest point on
the oil separator.
4. Remove and discard the oil fill plug on the compressor
housing. Install the special adapter with a gasket in the
oil fill opening of the compressor housing. Connect the
oil return hose of the oil separator to the special adapter
on the compressor.