McQuay MDS030AR User Manual

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Design & installation Guide For McQuay MDS Multi System
4.3 Refrigerant Piping Design and Installation
4.3.1 Refrigerant Piping Design ( Including Selection of Refnet Joint )
Capacity combination
The indoor units & outdoor units should have a relationship as follows:
Refrigerant piping limit
Note: the equivalent length is calculated as follows:
One refnet joint equals to 0.5m, one distributor kit equals to 1.0m.
The above table is based on the 8/10HP unit.
50%
indoor units' cap
outdoor units' cap
130%
The max. equivalent length L
The max. equivalent length L from the first refnet joint to the indoor unit L
Refnet of gas side
Refnet of liquid side
Refnet of gas side
Refnet of liquid side
D2D4D2D4
D2 D4D2D4D2D4D2D4D2D4
D2
D4
D1
D1
D1
D3
D3
D3
L2
D3
D3
L1
D1
L3
L4
L6
D1 D1 D1
D2
D4
dabc
e
f
g
h
i
L5
Outdoor unit
Liquid valve Gas valve
Throttle unit
Indoor unit
The height between outdoor unit and indoor unit H1
Height between indoor
unit and outdoor unit H2
Note:We strongly recommend that the capacity modulation equals to 100%.
Allowable value piping section
Actual length
250m
L
1
+L
2
+ L
i
Piping
Max. length(m)
Actual length 125m
L
1
+L
2
+ L
i
Equivalent length 150m
The length from the first branch to the remotest unit L(m) 40m L
2
+L
3
+ L
i
Height between indoor
Outdoor unit is above 50m -
Height
unit and outdoor unit
Indoor unit is above 40m -
Height between indoor unit and outdoor unit 15m -

McQuay MDS030AR Specifications

General

Brand	McQuay
Model	MDS030AR
Category	Air Conditioner
Language	English