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Testing Procedures
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit and
discharge capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures require
power to be connected. Ensure all ground wires are connected before certifying unit as repaired and/or
operational.
To charge system:
NOTE: When using ambient compensated calibrated
charging cylinder, allow liquid refrigerant to
enter high side only.
1. With no power applied to unit, allow liquid
refrigerant to flow into system until no more
refrigerant can be added.
2. Close valve on high side of manifold.
3. Start (apply power to) system and charge to
specification
through low side. Do not charge
through low side in a liquid form.
4. Close low side valve on manifold and pinch-off
both process tubes. Remove manifold set, crimp
shut open ends of process tubes and braze.
5. Recheck for refrigerant leaks.
Refrigerant
Precautions
To avoid personal injury, do not allow refrigerant to
contact eyes or skin.
To avoid risk of property damage, do not use
refrigerant other than that shown on unit serial
number identification plate.
NOTE: All precautionary
measures recommended
by
refrigerant manufacturers
and suppliers
apply and must be observed,
Using
Line Piercing
Valves
Line piercing valves can be used for diagnosis, but
are not suitable for evacuating or charging due to
holes pierced in tubing by valves.
NOTE: Do not leave line piercing valves on system.
Connection between valve and tubing is not
hermetically sealed. Leaks will occur.
Open Lines
During any processing of refrigeration system, never
leave lines open to atmosphere. Open lines allow
water vapor to enter system, making proper
evacuation more difficult.
@2003
MaytagAppliancesCompany
16022380
Rev. 0
17
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