 |
|||
|
|
|||
|
Page Title:
CHARGING THE SYSTEM |
|
||
| ||||||||||
|
|
 TM5-4110-234-14
TO 40R7-5-7-1
f.
Start vacuum pump.
g.
Open manifold valves.
h.
Open or "crack" both service valves.
i.
Run the vacuum pump until at least 29 inches of mercury, measured on the gage, is reached.
NOTE
Inability to reach 29 inches of mercury may indicate either a leak or a problem with the pump.
j.
Continue running the pump for one more hour, while observing the gage. If the gage needle moves back and
forth, you have a leak which must be located and corrected first.
k.
Close manifold valves.
I.
Backseat both compressor service valves.
m.
Stop vacuum pump.
n.
Disconnect hose from vacuum pump and go to paragraph 5-11 for charging instructions.
5-11.
CHARGING THE SYSTEM
After the system or portion of the system has been satisfactorily evacuated, the unit is ready to be charged.
NOTE
Whenever available, use recycled refrigerant for charging the refrigeration system.
a.
If the system was pumped down prior to repairs, the original charge is contained in the receiver.
(1)
Connect Refrigerant-12 tank in accordance with paragraph 5-11 b(1) through (3).
(2)
Operate, test and charge if necessary in accordance with paragraph 5-11 b(7) through (16).
b.
If the unit was not pumped down prior to repairs, it must be fully charged with Refrigerant-1i 2.
Always charge the refrigeration system with Refrigerant-1i 2 vapor. NEVER introduce LIQUID refrigerant
into the service valves.
(1)
Assuming that the service manifold was left in place after the unit was evacuated, remove hose end
from vacuum pump and connect it to Refrigerant-1i 2 tank valve.
(2)
Backseat and crack the compressor service valves.
(3)
Open refrigerant tank valve slightly and loosen hose fittings for a few seconds at the compressor service
valves to purge hoses. Then tighten hose fittings.
(4)
Using scales, measure and record weight of tank with liquid refrigerant.
If the refrigerant drum has a selector valve that allows either vapor or liquid refrigerant to be dispensed, be
sure it is in the vapor position.
Change 2 5-9
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals