System Evacuation - Ge 1G07 Instructions D’installation

INSTALLATION INSTRUCTIONS
Step 3 - Installation of the Outdoor Unit (Cont.)
D. Install Copper Lineset
• Cut the line set to length.
• Place nut over the pipe and then flare with the
R454B flaring tool.
NOTE: Follow standard practices as dictated by
the flare tool manufacturers for creating pipe flares.
When cutting and reaming the tubing, use caution
to prevent dirt or debris from entering the tubing.
Remember to place nut over the tubing before
flaring.
• To join the line set, directly align the tubing flare to
the fitting on the other pipe. Slide the nut onto the
fitting and hand tighten.
• Torque the fittings according to the specifications
shown in the torque chart below.
Forced fastening without careful centering may
damage the threads and cause a refrigerant leak.
Pipe Diameter ( ø )
1/4"
3/8"
1/2"
5/8"
• Two wrenches are required to
join the flare connection; one
standard wrench and one torque
wrench adjusted to the proper
settings.
• Repeat the process for attaching
the other end of the line set.
F. System Evacuation
NOTE– Do not open service valve.
• Attach a manifold gauge, micron gauge, and vacuum
pump to the suction line port using adapter AD-87 (see
illustration).
• Evacuate the system to at least 350 microns.
• Close the vacuum pump valve and check the micron
gauge. If the gauge rises 150 microns in 60 seconds, the
evacuation is incomplete or there is a leak in the system.
If the gauge does not rise 150 microns in 60 seconds, the
evacuation is complete.
• Once evacuation is complete, remove the adapter and hose
connection from the suction line port and replaced the cap.
18
Fastening torque
18 N.m / 13.3 Ft.lbs
42 N.m / 30.1 Ft.lbs
55 N.m / 40.6 Ft.lbs
60 N.m / 44.3 Ft.lbs
Half union Flare nut
Spanner Torque wrench
E. Leak Test
• Remove the cap on the service valve.
• Using a tank of dry nitrogen and approved regulator,
charge the system with 150 psig of dry nitrogen
using mini split adapter to connect the valve.
• Check for leaks at the flare fittings using soap
bubbles or another detection device. If a leak is
detected, make repairs to the fittings and recheck.
If no leaks are detected within 3 minutes, proceed.
• Using the same tank/regulator, charge the system to
300 psig.
• Check for leaks as earlier. If no leaks are detected
within 3 minutes, proceed.
• Using the same tank/regulator, charge the system to
500 psig.
• Check for leaks as earlier. Keep system pressurized
for at least 20 minutes.
WARNING
Do not use acetylene, oxygen,
compressed air or any mixture containing anything
other than dry nitrogen. Use only dry nitrogen for
pressure testing. Do not use mixtures of hydrogen
containing refrigerant and air above atmospheric
pressure for pressure testing, as they may become
flammable and could result in an explosion.
Refrigerant, when used as a trace gas, should only
be mixed with dry nitrogen for pressurizing units.
Failure to follow these recommendations could result
in death or serious injury as well as equipment or
property damage.
31-5001075 Rev. 0