McQuay MDS300B Guía de instalación Pagina 62
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Design & installation Guide For McQuay MDS Multi System
● Check the air speed according to the actual pipe diameter, and calculate the actual speed, which
should not larger than the recommended value in the design manual.
● Select the loop of most resistance and that of minimum resistance, and then calculate the
frictional resistance and local resistance loss of each pipe segment.
● Check the unbalance ratio of the loop of most resistance to that of minimum resistance must be
less than 15%. Otherwise, redesign the air pipe system, or satisfy the balance ratio require-
ments by adjusting with the valve.
3.4.3 Air pipe design
To improve the operational efficiency of air conditioning, carefully consider and fully install such
fittings as material, adjustment valve and fire protection valve.
■ Material of the air pipe
The air pipe is always made from metal material, such as sheet steel, galvanized sheet or aluminum
sheet. It also can be made from non-metal material, such as hard polyvinyl chloride, glass reinforced
plastic or other composite materials. The air pipe in the construction space or duct channel also can
be used according to the actual conditions. The air pipe surface should be polished, straight and
smooth. Some air pipes should even be painted. The air duct channel should be waterproofed. The
air pipe in the room with corros ive gas may be made from glass reinforced plastic or plastics and
tightly sealed.
■ Air pipe shape
● The cross-section of the air pipe is generally rectangle or round. It also can be designed to ellipse,
semicircle or spiral.
● The round air pipe has the advantages of high strength and low material loss, but it occupies large
useful space and its elbow and tee should be of long distance. Generally, the flexible round air pipe
is used for the new air pipe, small volume air refnet joint (such as in toilet with small area).
● The rectangle air pipe occupies small space, and is easy to install and neat for surface mounting. It
has been widely applied.
● For the convenience of mechanical processing of the air pipe and flange and configuring
standard valves, try to improve the utilization of the air pipe cross section. The air pipe
dimension should be designed according to Calculation Form of National Universal Air pipe.
The ratio of the height of the rectangle air pipe to its width should be less than 4, based on the
outer diameter or length of external sides. The following table shows the standard specifica-
tions of the air pipe.
Specifications of the round air pipe
Diameter of the air pipe
Basic series Auxiliary series Basic series Auxiliary series Basic series Auxiliary series
100 80/90 320 300 900 850
120 110 360 340 1000 950
140 130 400 380 1120 1060
160 150 450 420 1250 1180
180 170 500 480 1400 1320
200 190 560 530 1600 1500
220 210 630 600 1800 1700
250 240 700 670 2000 1900
280 260 800 750
The high-speed air pipe is generally round spiral pipe with a larger thickness.
unit: mm
Side size of the air pipe
120 320 800 2000 3000
160 400 1000 2200 3500
200 500 1250 2500 4000
250 630 1600 2800
Specifications of the rectangle air pipe
unit: mm
- CONTENTS 3
- Overview 4
- 1.2.3 System principle 6
- MDS080R、 MDS100BR、MDS120BR 7
- MDS150BR 7
- MDS200BR、MDS220BR、MDS240BR 8
- MDS180BR 8
- MDS280BR、MDS300BR 9
- MDS260BR 9
- 1.3 Main features 10
- 1.4 Nomenclature 12
- 1.5 Products Series 14
- 1.6 Performance Parameter 15
- 1.6.3 Ceiling cassette 16
- 1.6.5 Specification 17
- 1.6.6 Specification 18
- 1.7 Operating Range 19
- 1.8 Refnet 19
- 1.8.2 Distributor kit 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
- 1.10.3 MDS060A(R) 26
- 1.10.5 MDS150B(R) 27
- 1.10.8 MDS280B(R)、MDS300B(R) 28
- 1.10.7 MDS260B(R) 28
- Units Control 29
- 2.3.3 Wire control panel 33
- 2.3.4 Outline dimension 33
- 2.3.5 Installation type 33
- ■ concealed installation 33
- 2.5 Network Central Control 36
- 2.6 Wiring Diagram 37
- ■ Model MCK025/030/040/050T 38
- ■ MCM020/030T 38
- ■ Model MCM050T 39
- ■ Model MDB050/060T 39
- ■ Model MDS030A 40
- ■ Model MDS030AR 40
- ■ Model MDS040AR 41
- ■ Model MDS040A 41
- ■ Model MDS050A 42
- ■ Model MDS050AR 42
- ■ Model MDS060A 43
- ■ Model MDS060AR 44
- ■ Model MDS080/100/120B 45
- ■ Model MDS080/100/120BR 45
- ■ Model MDS150B 46
- ■ Model MDS150BR 46
- ■ Model MDS180B 47
- ■ Model MDS180BR 47
- ■ Model MDS200/220/240B 48
- ■ MDS200/220/240BR 48
- ■ Model MDS260BR 49
- ■ Model MDS260/280/300BR 49
- ■ Model MDS280/300BR 50
- 2.7 Wiring Diagram 51
- 2.7.3 MDS080～240B/BR 52
- 2.7.4 MDS260～300B/BR 52
- 2.8 Electrical Date 53
- Selection 54
- 3.2 Indoor unit selection 56
- 3.4 Design of Air System 60
- 3.5 Refnet joint selection 65
- For MDS-A series 66
- For MDS-B series 66
- Y type 67
- Type: MDS-Y5 67
- Type：MDS-C2、MDS-C3 68
- Type : MDS-C1 68
- Installation 69
- 4.2 Outdoor unit installation 76
- ■ MDS030～060A/AR Units 77
- ■ MDS080～300B/BR 77
- The gas must be Nitrogen 85
- 6.4mm~25.4mm 10mm or more 90
- 28.6mm~38.1mm 15mm or more 90
- （Unit: mm） 91
- 5.1.1 MDS series indoor units 100
- Address settings (SW2.1 101
- Power setting（SW3.1 —— SW3.4） 102
- Reserve 102
- ( Figure 3 ) 104
- 5.2 Trial Run 107
- Servicing and Maintenance 108
- 6.2 Servicing and Maintenance 109
- C H A P T E R 113
- WWW.MCQUAY.COM 120
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