Refrigerant Line Leak Check; Check For Leaks; Evacuation; Evacuate The Refrigerant Lines And Indoor Coil - ComfortStar 18 Installation Manual

8 REFRIGERANT LINE LEAK
CHECK

8.1 Check For Leaks

1. Pressurize the refrigerant lines and evaporator coil
to 150 PSIG using dry nitrogen.
150 PSIG
Figure 8-1
2. Check for leaks by using a soapy solution or bubbles
at each brazed location.
Figure 8-2
Remove nitrogren pressure and repair any leaks before
continuing.

9 EVACUATION

9.1 Evacuate the Refrigerant Lines
and Indoor Coil
Do not open the service valves until the
refrigerant lines and indoor coil leak check and
evacuation are complete.
1. Evacuate until the micron gauge reads no higher
than 350 microns, then close off the valve to the
vacuum pump.
0350
Microns
ON
Figure 9-1
2. Observe the micron gauge. Evacuation is complete if
the micron gauge does not rise above 500 microns
in one (1) minute.
Once evacuation is complete blank off the vacuum
pump and micron gauge, and close the valves on
the manifold gauge set.
1 MIN.
Figure 9-2
08
NOTE
OFF