TM9-4120-400-14
CHARGING THE REFRIGERANT SYSTEM. - continued
5-16.
PARTIAL CHARGE
D A N G E R O U S CHEMICAL REFRIGERANT UNDER PRESSURE
is used in the operation of this equipment.
Use great care to avoid contact with liquid refrigerant or inhaling refrigerant gas being
discharged from any container under pressure. Sudden and irreversible tissue damage
can result from freezing. Wear thermal protective gloves and a face protector or safety
glasses in any situation where skin or eye contact is possible.
Prevent contact of refrigerant gas with flame or hot surfaces. Heat causes the refrigerant
to break down and form carbonyl chloride (phosgene), a highly toxic and corrosive gas.
NOTE
The charging operation should be done with all panels in place except for refrigerant
charging valve access cover. Whenever available, use recycled refrigerant.
1.
Connect the yellow 1/4 inch (charge) hose to a cylinder of Refrigerant-22 set to deliver gas only.
2.
Loosen hose connections on the HIGH and LOW PRESSURE CHARGING VALVES slightly.
Check that vacuum and charge valves are closed.
3.
4.
Open pressure gauge and compound gauge valves.
Open refrigerant cylinder valve.
5.
6. Open charge valve slightly to allow a small amount of refrigerant to purge air from hoses. Tighten hose
connections on the HIGH and LOW PRESSURE CHARGING VALVES. Close charge valve.
Never introduce liquid refrigerant into the low pressure (suction) charging valve. This can
7.
Close compound gauge valve.
Connect power at power source.
8.
Turn air conditioner on and operate in COOL mode with TEMPERATURE SELECTOR set at maximum
9.
COOLER position.
5-45