McQuay MDS300B Guía de instalación Pagina 63
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Design & installation Guide For McQuay MDS Multi System
■ Reinforcement of the air pipe
Generally, the air pipe is reinforced through using the ridge web and ridge lines, or adding flanges
or reinforcing frames. Strictly follow the newest national standard Ventilation and Air Condition-
ing Engineering and Acceptance Standard when making and installing the pipes.
■ Accessories of the air system
The air system has following accessories: air outlet/return air inlet, outside rainproof shutter, air
flow adjusting valve, smoke discharge & fireproof valve, and air deflector. The smoke discharge
& fireproof valve must be tested before installed. The surface of the air outlet and the return air
inlet must be smooth and even. The size of the neck part must be within the allowed deviation
range so that it can engage with the air pipe tightly. The entire air conditioning system, including
all the accessories, should be firm and tight, and, after installed, it should be pass the light
leakage or air leakage acceptance check for a low-pressure air pipe system.
■ Heat insulation of the air system
The heat insulating layer of the air pipe system should also be non-flammable. Generally, it is 25
mm thick if it is PE materials, or at least 35 mm when consisting of common glass cotton. This
layer should be even, dense, closely attached to the air pipe and its accessories, and without cold
bridges. It should also be well protected against scratch.
■ Design and calculation of fresh air flow
The fresh air volume mainly depends on the health requirements, the supplementary local air exhaust
volume, and therequirement to guarantee the air conditioned room in “positive pressure”.
■ Health requirements
Generally, in both the country and the city, the content of carbon dioxide outdoor is 0.5–0.75 g/
kg. According to the allowed density of this gas (see the following table), you can use the overall
ventilation volume defined in the Industrial Ventilation to calculate the volume of fresh air needed
to eliminate it.
■ Elbow
The rectangular air pipe can be inner-arc or inner-slanting, as shown in Figure 4-2. When the
longest side is 500 mm or longer, a flow deflector must be used.
■ Wall thickness of the air pipe
The wall thickness directly relates to the effect and life of the pipe. A too thin wall will cause
unstable installation, and thus the pipe will sway within a large range to increase the noise. Even
worse, the friction might compound the problem, shortening the service life of the air pipe or even
the entire air conditioning system.
Air pipe elbow
≤320 340～450 480～630 670～1000 1120～1250 1320～2000
Low-speed air pipe 0.5 0.6 0.8 1.0 1.2
High-speed air pipe 0.8 0.8 0.8 1.0 1.2
Round air pipe 0.5 0.6 0.8 1.0 1.2
Connection mode Insertion Flange
Unit: mmRecommended thickness of steel air pipes and accessories
Diameter of round air pipe or
length of the longest side of rect-
angular air pipe
Rectangular
air pipe
- 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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