TM
9-4120-401-14
5 - 1 8 . CHARGING THE REFRIGERANT SYSTEM.
This task covers:
a. Full Charge
b. Partial Charge
INITIAL SETUP
Equipment Condition
Tools
Refrigeration Unit Service Tool Kit
Appendix B, item 1
Goggles
Use disconnect switch (NOT POWER
Appendix B, item 2
CABLE) to disconnect power to unit.
Damage to cable connector pins will
Gloves
result if cable is used.
Appendix B, item 2
Disconnect power at power source.
Materials/Parts
Install service manifold (para 5-11).
Refrigerant R-22
Appendix E, item 4
Evacuate the refrigerant system (para 5-17).
a. Full Charge.
Dangerous chemical refrigerant under pressure is used in the operation of this
equipment. Use great care to avoid contact with liquid refrigerant.
Sudden and irreversible tissue damage can result from freezing. Wear gloves
and a face protector or safety glasses in any situation where skin or eye contact
with refrigerant is possible.
Heat causes the refrigerant to break down and form carbonyl chloride
(phosgene), a highly toxic and corrosive gas. Prevent contact of refrigerant with
flame or hot surfaces.
The system must be evacuated before charging.
Use only refrigerant R-22 to charge the unit.
NOTE
The charging operation should be done with all panels in place except for
refrigerant charging valve access cover.
(1) Connect the charge hose to a cylinder of refrigerant R-22 set to deliver gas.
(2) Loosen hose connections on the HIGH and LOW PRESSURE CHARGING VALVES slightly.
5-45
