INSTALLATION
Q
10
1. CE126 Compressor
2. Motor Terminal Cover
3. Lube Box
4. Oil Coolers
5. Expansion Valves
6. Liquid Line Shut-Off Valve
7. Evaporator 12.
8. Condenser 13.
9. Control Center 14.
10. Discharge Check Valve 15.
11. Oil Pump 16.
FIGURE 9
TEH 126
Oil Level Sight Glass
Oil Sump
Oil Cooler Water Lines
Motor Liquid Cooling Line
Condenser Relief Valves (Hidden)
REPAIR OF SYSTEM (If Necessary)
Pressure Testing
No pressure testing is necessary unless some damage
has been incurred during shipment. Damage may be
determined upon a visual inspection of the exterior
piping assuring no breakage occurred or fittings
loosened. Panel gauges should show a positive pres-
sure (except R-114 units in cold locations). If no pres-
sure is evident on the gauges, a leak may have oc-
curred discharging the entire refrigerant charge. In this
case, the unit should be leak tested to determine the
location of the leak. R-114 units must be above an
ambient of
to show a positive pressure.
Leak Testing
In the case of loss of the entire refrigerant charge, the
unit should be checked for leaks prior to charging the
complete system. This can be done by charging
enough refrigerant into the system to build the
pressure up to approximately 1- psig and adding
sufficient dry nitrogen to bring the pressure up to a
maximum of 125 psig and then leak test with a Halide
or electronic leak detector. WATER FLOW THROUGH
THE VESSELS SHOULD BE MAINTAINED ANY TIME
REFRIGERANT IS ADDED OR REMOVED FROM THE
SYSTEM. CAUTION: DO NOT USE OXYGEN TO
BUILD UP PRESSURE AS A SERIOUS EXPLOSION
CAN RESULT. A pressure regulating valve should
always be used on the nitrogen drum being used to
build up the system pressure. Also, do not exceed the
test pressure given above. When the test pressure is
reached, disconnect the gas cylinder.
If any leaks are found in welded or brazed joints or if it
is necessary to replace a gasket, relieve the test
pressure in the system before proceeding. For copper
joints, braze alloy is recommended.
After making any necessary repair, the system should
be evacuated as described in the section following.
Evacuation
After it has been determined that there are no
refrigerant leaks, the system should be evacuated
using a vacuum pump with a capacity of approximately
3 cu. ft./min. and that will reduce the vacuum to at
least 1 millimeter (1000 microns).
A mercury manometer, electronic or other type of
micron gauge should be connected at the farthest
point from the vacuum pump. For readings below 1
millimeter, the electronic or other micron gauge should
be used.
The triple evacuation method is recommended and is
particularly helpful if the vacuum pump is unable to
obtain the desired 1 millimeter of vacuum. The system
is first evacuated to approximately 29 inches of
mercury. Enough refrigerant vapor is then added to the
system to bring the pressure up to zero pounds.
Then the system is once again evacuated to approxi-
mately 29 inches of mercury. This is repeated 3 times.
The first pull down will remove about 90% of the
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Summary of Contents for Templifier
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