McQuay MDS030AR User Manual

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Design & installation Guide For McQuay MDS Multi System
If we know the heat performance index q
v
[W/(m
3
. )] and outside volume V (m
3
), we can
calculate the heating load
as follows:
Q
total
= aq
v
V( t
n
t
w
)
Where,
a is the correction factor. For details, see the table.
q
v
is the heat performance index of the building. It is the heating load when the difference between
the indoor temperature and the outdoor temperature is 1
. For details, see the table.
V is the outside volume of the building. (Unit:m
2
)
(t
n
-t
w
) is the calculated difference between the indoor and outdoor temperatures. (Unit: )
Heating outdoor temperature
a Heating outdoor temperature a
0 2.05 -25 1.08
-5 1.67 -30 1.00
-10 1.45 -35 0.95
-15 1.29 -40 0.9
-20 1.17
Notes
During selection, you must consider the following factors which affect the cooling and heating attenuation
and correction: 1) Length of the pipe connecting the indoor unit and outdoor unit; 2) Difference between the
actual ambient temperatures of the indoor/outdoor units and the rated working temperatures of the MDS
for cooling/heating.
If the heating pump system is selected according to the cooling load, you must verify its heating capacity.
Especially in the areas north to Yellow River, inadequate heating capacity must be compensated
with a model with an auxiliary electric heater or hot-water coil pipe.
The MDS unit is designed according to GB/T 18837-2002. There is a negative difference of about 5% between
the actual cooling capacity and the rated capacity. Therefore, you must fully consider this factor during selection
and ensure certain cooling capacity factor.
Heat performance index of the building
Building type V (10
3
m
3
)q
v
W/m
3
t
n
Building type
V(10
3
m
3
)q
v
W/m
3
t
n
5 0.6 5 10 3.38
Office 5
10 0.53 18 Workshop 11 20 2.73 14
building 11
15 0.49 21 30 2.04
15 0.56 31 1.45
5 0.72 0.5 2.30
Club 5 10 0.65 16 Equipment 0.6 1.0 0.82 12
11 0.58 room 1.1 2.0 0.71
2.1 0.50
5 0.81 0.5 0.83
Hospital 6
10 0.75 20 0.6 1.0 0.72 18
11
15 0.67
Auxiliary room
1.1 2.0 0.56
16 0.64 2.1 0.51
5 0.92
6
10 0.82
Fire engine
2.0 0.72
Cinema 11
15 0.79 14 2.1 5.1 0.63 15
16
20 0.70 house
5.1 0.60
21
30 0.65
31 0.61
5 1.22 5.0 1.49
Public area 6 10 1.14 14 Bathroom 5.1 10.0 1.38 25
11 1.05 10 1.25
Heating correction factor a:

McQuay MDS030AR Specifications

General

Brand	McQuay
Model	MDS030AR
Category	Air Conditioner
Language	English