Hotpoint 1H09HN2DAA Installation Instructions Manual page 19

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 R32
flaring tool.
NOTE: Follow standard practices 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.
31-5000884 Rev. 2
Fastening torque
18N.m/13.3Ft.lbs
42 N.m/30.1Ft.lbs
55N.m/40.6Ft.lbs
60 N.m/44.3Ft.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.
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