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Design & installation Guide For McQuay MDS Multi System
Selection
CHAPTER
3
3.1 Load Calculation
3.1.1 Planning and Cooperation
McQuay recommends you to estimate and plan the following before engineering.
Based on the air conditioning area function, calculate cooling/heating load (depending on the
temperature,humidity, and ventilation).
Query related meteorologic information, especially the sun light, wind direction in winter and
summer, the ambient cooling/heating sources, and other external factors that may affect the
running of the units. Then decide the place and azimuth to place the units based on the
environmental factors favoring the normal running of the units. For the outdoor meteorologic
parameters of each city in China, see
Annex 1 Outdoor meteorologic parameters of major
cities in China . However, the description about selection in this manual is only for your
reference; for actual engineering, please consult with a professional design institute or related
construction unit in this area.
Develop the project schedule, plan the installation space of the unit, and adjust the engineering
associated with the constructional engineering and inside finishing.
Through field survey, ascertain the size of the entrance for the air conditioner, the weight capacity
of the place to put or hang the equipment, the range of the auxiliary engineering, and the location
of the power supply.
Check and verify the calculated of the design. Confirm and determine the model and specifications
of the unit.
3.1.2 Cooling Load Calculation
The cooling load of the air conditioning area is determined by the real-time maximum cooling load
or accumulated calculated cooling load of each room based on the area, storey height, and
usage of the room serviced. It also includes the additional cooling load caused by the ventilator
blower, the exhauster, and the air pipe system. In actual engineering, the total cooling load is
calculated as follows:
Q
total
= F
1
q
1
+ F
2
q
2
+ + F
n
q
n
Where,
F
1
-----The air conditioning area of each calculated unit (Unit: m
2
.)
q
1
-----The cooling load per unit area of each calculated unit (Unit: W/m
2
).
Annex 2 (1) lists the estimated indexes and design parameters of the air conditioner cooling load
of different buildings for your reference.
3.1.3 Heating Load Calculation
The heating load of the air conditioning system is closely related with the heat insulation
performance of the walls, doors and windows, and roof. It is also affected by the penetration of cool
wind from outdoors, open frequency of the outside door, and the use of the indoor appliances. It
is calculated basically in the same way as the cooling load. If the heating load per unit area of the
building q
F
is known (see Annex 2), the heating load of the building is as follows:
Q = Fq
F
Where,
F -----The construction area (Unit: m
2
)
- 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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