14
11-AC40D1-1E-EN
Refrigerant Line Leak Check
Table 17.
Check for Leaks
1.
Pressurize the refrigerant lines and evaporator coil to 150 PSIG
using dry nitrogen.
150 PSIG
2.
Check for leaks by using a soapy solution at each brazed location.
Note:
Remove nitrogen pressure and repair any leaks before
continuing.
Refrigerant Line and Indoor Coil Evacuation
IIm
mp
po
orrtta
an
ntt:: 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
OFF
2. Observe the micron gauge. Evacuation is complete if
the micron gauge does not rise above 500 microns in
one (1) minute.
3. When evacuation is complete, blank off the vacuum
pump and micron gauge, and close the valves on the
manifold gauge set.
1 MIN.
