Precautions For Piping - Daikin LRYEQ16AY1 Service Manual

Test Operation

5.3.5 Precautions for Piping

Perform piping branching with the following conditions kept in mind.
Liquid piping
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At the time of branching the liquid piping, use a T-joint or Y-joint and branch it horizontally.
This will prevent an uneven flow of refrigerant.
Use a Y-joint for the liquid refrigerant branch and have the piping branch horizontally.
Y-joint
Gas piping
At the time of branching gas piping, use a T-joint and branch it so that the branched piping
will be located above the main piping (see the illustration below). This will prevent the stay of
refrigerant oil in the indoor unit not in operation.
Use a T-joint for the gas refrigerant branch and connect from the top of the main piping.
Branch piping
Make the piping
slant downward
Make sure that the horizontal portion of the gas piping slants downward to the outdoor unit
(see the illustration above).
If the outdoor unit is located above, make a trap on the gas pipe at 5 m intervals from
outdoor unit. This will ensure the smooth returning of oil in the piping slanting upward.
Horizontal
surface
A-arrow view
A
T-joint
Main piping
Indoor unit side
T-joint
SiBE811001EB
±30˚ or less
Branch piping
Make the piping
slant downward
Main piping
Make the piping
slant downward
Outdoor unit side
CONVENI-PACK