Samsung AM***XMDCH Series Installation Manual page 21

❋ When the equivalent length between an outdoor unit and the farthest indoor unit exceeds 90m (295'), upgrade the low
pressure pipe of the main pipe one step.
❋ Note 1) When indoor unit is located at higher level than outdoor unit, allowable height difference is 40m(131ft), but
when the indoor unit is located at lower level than outdoor unit, allowable height difference is 50m(164ft).
Refrigerant pipe work
Refrigerant Y-joint installation
Install the Y-joint 'horizontally' or 'vertically' .
Install horizontally
Install vertically
When using A~J type of Y-joint, connect the Y-joint to the pipe with the provided reducer.
When using K~Z type of Y-joint, connect the Y-joint to the pipe by cutting the inlet of the Y-joint or provided
NOTE
reducer properly.
Install the Y-joint within ±15° on the horizontal or on the vertical.
Make sure that the pipe does not break at Y-joint and pipe connection.
CAUTION
Keep a minimum straight line distance of 500mm (20 inch) or more before connecting Y- joint.
Reducer
Pipe
Front
Connect to
outdoor unit
Connect to other branch
Rear
joint or indoor unit
Pipe connection
Reducer
Rear
Gas/liquid side Y-joint
❋ Install the Y-joint within ±15° on the
horizontal or on the vertical.
10~15mm (0.39~0.59 inch)
or more
Main pipe
Minimum straight line distance
[500mm (20 inch) or more]
21