Carrier 53KHET 12 Installation Manual page 28

CONNECTING REFRIGERANT PIPING LINES (Cont.)
INSTRUCTIONS OF CONNECTIING REFRIGERANT PIPING LINES (Cont.)
Insulation
Excessive tubing
must be coiled
Copper
Piping
horizontally
When making a bend, the installer cuts
insulation and slides it away from the bend
area. Using a tube bender makes the bend
and then the insulation is replaced gluing it
together.
When there is excessive tubing, it must be
coiled horizontally so that the flow of
refrigerant is from the top to bottom of the
coil and towards the outdoor unit.
The excessive tubing must not be coiled
vertically since the vertical coil affects the
oil return to the compressor.
Avoid disconnecting refrigerant piping
connections after they have been tightened
to avoid refrigerant leaks.
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