McQuay MDS080BR Installation Guide Page 78
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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 -
- CONTENTS 3
- Overview 4
- MDS080BR MDS100BR MDS120BR 7
- MDS150BR 7
- MDS200BR MDS220BR MDS240BR 8
- MDS180BR 8
- MDS280BR MDS300BR 9
- MDS260BR 9
- 1.3 Main Features 10
- Nominal capacity 11
- 100% operating 11
- 1.4 Nomenclature 12
- 1.5 Products Series 14
- 1.6 Performance Parameter 15
- 1.6.3 Ceiling Cassette 16
- 1.7 Operating Range 19
- 1.8 Refnet 19
- 1.8.2 C Type 20
- 1.9 Outline of Indoor Units 21
- 1.9.2 MDB050T 22
- 1.9.3 MDB060T 22
- 1.9.5 MCM020T MCM030T MCM050T 23
- 1.9.6 Auxiliary Heating Coil 24
- 1.10 Outline of Outdoor Units 25
- Unit Control 27
- Te m perature 28
- 2.3.3 Wire Control Panel 31
- 2.3.4 Outline and Dimension 31
- 2.3.5 Installation Type 31
- concealed installation 31
- 2.5 Network Central Control 34
- 2.6 Wiring Diagram 35
- Model MCK025/030/040/050T 36
- MCM020/030T 36
- Model MCM050T 37
- Model MDB050/060T 37
- Model MDS030A 38
- Model MDS030AR 38
- Model MDS040AR 39
- Model MDS040A 39
- Model MDS050A 40
- Model MDS050AR(220V~/50Hz) 40
- Model MDS060A 41
- Model MDS060AR(220V~/50Hz) 42
- Model MDS080/100/120B 43
- Model MDS080/100/120BR 43
- Model MDS150B 44
- Model MDS150BR 44
- Model MDS180B 45
- Model MDS180BR 45
- Model MDS200/220/240B 46
- Model MDS200/220/240BR 46
- Model MDS260BR(Master Unit) 47
- Connecting the master unit 48
- 2.7 Electric Connection 49
- 2.7.3 MDS080 240B/BR 50
- 2.7.4 MDS260 300B/BR 50
- 2.8 Electric Data 51
- Selection 52
- 3.2 Selection of Indoor Units 54
- Correction factor 57
- 3.4 Design of Air System 58
- 3.5 Slection of Refnet Joint 63
- For MDS-A series 64
- For MDS-B series 64
- Y type 65
- Type: MDS-Y5 65
- 3.6 Selection of E-EXV Box 66
- Installation 67
- Suspension ropes 68
- Protective pads 68
- (2 ropes) 68
- 4.2 Indoor Unit Installation 70
- (machine dimension) 820mm 73
- PULL PULL PULL PULL 76
- Height between indoor 78
- Refnet joint 80
- Outdoor unit 80
- Distributor kit 80
- Controller 81
- Indoor unit 81
- To indoor unit 82
- To outdoor unit 82
- Moisture 83
- Blind plug(copper) 84
- Flare fitting 84
- Avoid wielding too often 85
- Work flow 86
- NO.1 NO.2 87
- 6.4mm~25.4mm 10mm or more 88
- 28.6mm~38.1mm 15mm or more 88
- Unit: mm 89
- Absolute pressure 91
- Surface pressure (kg/cm 91
- Ordinary vacuum drying 92
- Special vacuum drying 93
- 30 or more 96
- Pipe mouth facing downward 96
- Air vent pipe 96
- Air vent device 97
- 5.1.1 MDS Series Indoor Units 98
- Model 1 setting (SW1.1 SW1.6) 98
- Address settings (SW2.1 99
- Model 2 setting 100
- SW3.5 SW3.8 100
- Power setting SW3.1 SW3.4 100
- Reserve 100
- Digital control 102
- 5.2 Trial Run 105
- Servicing and Maintenance 106
- 6.2 Servicing and Maintenance 107
- For example: 112
- WWW.MCQUAY.COM 116
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