Carrier 42QG18-C - Refrigerant Piping Preparation Steps; Cutting and Preparing Piping Ends

29
Corrugated Cutting Wrap Cutting
CONNECTING REFRIGERANT PIPING LINES (Cont.)
15-9 STEPS FOR PREPARING REFRIGERANT PIPING LINES BEFORE CONNECTIONS
( IN CASE OF NOT USING THE OPTIONAL FACTORY REFRIGERANT PIPING LINES WITH THE FLARE NUTS )
STEP (1): Cutting refrigerant piping lines
• Remove protective caps from copper pipe ends.
• Position tube end downwards, cut the pipe to the
required length with a pipe cutter.
NOTE:
• It is recommended to cut approx. 30→50 cm
longer than the estimated pipe length.
• Take care to ensure that the cut edge remains at a
90° angle with the side of pipe, and refer to the
illustrations for examples of edges cut correctly
and incorrectly.
Removing the burrs
•
Remove burrs at the end of the connection pipe
with a pipe reamer or a file.
This process is important and should be done
carefully to make a good flare and to prevent any
gas leaking out.
NOTE:
When reaming, hold the pipe end downward and
be sure that no copper scraps fall into the pipe.
STEP (2): Removing the flare nuts from the
indoor unit.
Remove the suction and liquid flare nuts from the
indoor unit connections.
NOTES:
• Do not remove the flare nuts from the indoor unit
until refrigerant piping lines are ready for
connections.
• It is that easier to remove flare nuts from the
indoor unit before being installed on the wall hang
bracket.
STEP (3): Removing the flare nuts from the
outdoor unit Remove the suction
and liquid flare nuts from the
outdoor unit connections.
NOTES:
• Do not remove the flare nuts from the outdoor unit
until refrigerant piping lines are ready for
connection.
• It is easier to remove flare nuts from the outdoor
unit before being installed on the wall support.
Debarring
After
Before
1: Connection pipes
2: Reamer
1
2
Pipe Cutter
Correct Cutting
Inclined Cutting