TM9-4120-400-14
5-16.
CHARGING THE REFRIGERANT SYSTEM. - continued
FULL 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.
8.
Set refrigerant cylinder to deliver liquid only.
9.
Place refrigerant cylinder on an accurate scale to measure and record weight.
10. Open HIGH and LOW PRESSURE CHARGING VALVES.
11. Open charge valve. Allow liquid refrigerant to enter system until drum weight has decreased by (2.2 pounds
(1.0 kg) for F9000H-1SA or 2.4 pounds (1 .09 kg) for F9000H-3SA) or until system pressure has equalized.
12. Close charge and pressure gauge valves.
13. Reset low pressure and high pressure cutout switches.
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