Carrier 53QPCT18H-708F Installation Manual page 33

CONNECTING REFRIGERANT PIPING LINES (Cont.)
STEPS OF PREPARING REFRIGERANT PIPING LINES BEFORE CONNECTIONS (Cont.)
STEP (4): Flaring the Piping (Cont.)
3) Avoid incorrect flaring, which results in
damaged or cracked or inclined with
uneven thickness surface.
STEP (5): Mounting flare nuts on the other
ends of refrigerant piping lines
• Mount gas flare nut (Large nut) on the other end
of gas refrigerant piping line.
Mount liquid flare nut (Small nut) on the other end
•
of liquid refrigerant piping line.
STEP (6): Removing protective plastic nuts
of gas and liquid connections of
indoor units.
NOTES
• Do not remove protective plastic nuts from the
indoor unit until refrigerant piping lines are ready
for connections.
STEP (7): Removing protective plastic nuts
of gas and liquid connections
of outdoor unit.
NOTES
• Do not remove protective plastic nuts from the
outdoor unit until refrigerant piping lines are ready
for connection.
It is easier to remove protective plastic nuts from
•
the outdoor unit before being installed on the wall
support.
Liquid Line
Gas Line
Refrigerant Piping Lines After
Connecting Flare Nuts From Both Sides
Gas line
In indoor unit
Liquid line
In indoor unit
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