Mitsubishi Electric CITY MULTI PUHY-EP200YLM-BS Installation Manual page 26

9-5-2. Connecting pipes
・The refrigerant pipe from the outdoor unit is branched at the pipe end, and each branch is then connected to an
indoor unit.
Indoor unit
Gas pipe
Outdoor unit
Liquid pipe
Branched section
・Refer to section 5 "Package contents" for details about the supplied connecting pipes.
・When connecting pipes, make sure the service valves are completely closed.
・Commercially available pipes often contain dust or debris. Always blow them clean with a dry inert gas.
・Take care to prevent dust, water or other contaminants from entering the pipes during installation.
・Reduce the number of bending portions as much as possible, and make the bending radius as big as possible.
・Do not use any commercially available anti-oxidizing agents since they may cause pipe corrosion and degrading of
the refrigerant oil. Please contact Mitsubishi Electric for more details.
・Make sure that the pipes are not in contact with each other, unit panels, or base plates.
(1) When routing the pipes through the front of the unit
Ⓒ
Ⓐ Ⓑ
Ⓔ
Ⓖ
Ⓕ
Ⓐ Refrigerant service valve (liquid)
Ⓑ Refrigerant service valve (gas)
Ⓒ
Refrigerant service valve (low-pressure gas)
Ⓓ Refrigerant service valve (high-pressure gas)
Ⓔ Supplied connecting pipes ①②③ (liquid side)
Ⓕ Supplied connecting pipes ④⑥ (gas side)
Ⓖ Supplied connecting elbow ⑤ (gas side)
Ⓗ Supplied connecting pipe ⑦ (gas side)
Ⓘ Supplied connecting pipes ⑧⑨ (liquid side)
Ⓙ On-site piping
WT07281X03
Connecting method
Brazed or flared
Brazed
Brazed
Brazed
Ⓓ
Ⓘ
Ⓙ
(2) When routing the pipes through the bottom of the unit
Ⓐ Ⓑ
Ⓔ
Ⓗ
GB-24
Ⓓ
Ⓒ
Ⓘ
Ⓙ