McQuay MDS030A, Руководство по обслуживанию

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4 Service Manual SM-MDS_(ii)
1.5 Maximum Piping Length
The presence of sub-cooling circuit within MDS system has allowed the system to qualify for long piping
application. Besides that, MDS system is designed to ease oil return to the compressor and this has further
improved the maximum connectable piping length for each system.
R-22 R-410A
Length (m) 3-5HP 6-7 HP 8-32 HP 5HP 6-7 HP 8-50 HP
Piping
Total equivalent length 100 150 350 100 150 500
Maximum length of
longest branch
Actual piping length 50 70 125 50 70 150
Equivalent length 60 80 150 60 80 175
Maximum equivalent length from first
branch to furthest unit
25 30 40 25 30 65
Height
Between further
indoor and outdoor
outdoor above 20 30 50 20 30 50
indoor above 20 30 40 20 30 40
Maximum height between indoor unit 15
1.6 Refnet and Distributor
The refnet joint and distributor is provided by the factory in accordance with different indoor units. This will
reduce the work force at site and ease the piping installation work. The dimension of refnet and distributor
available is as follow:
Refnet Joint
: MDS-Y1-A, MDS-Y2-A, MDS-Y3-A, MDS-Y4-A, MDS-Y5-A, MDS-Y6-A, MDS-Y7-A
Distributor : MDS-C1, MDS-C2, MDS-C3
Dimension of refnet model MDS-Y1-A, MDS-Y2-A, MDS-Y3-A and MDS-Y4-A
Maximum height
between indoor units
Height between further
indoor and outdoor
Maximum length of
longest branch
1