IOM SYSVRF2 AHU BOX0620 20220209 134828067 20220209 140819162
04
3.1 Before Installation
An AHU control box can be connected to a heat pump
ODU or a heat recovery ODU.
When an AHU control box is connected to a heat
recovery ODU, the system is not allowed to connect
to AHU only. The IDU/ODU capacity ratio of common
IDUs should be 50%-100%, that of the AHU control
box should be 0%-50%, and that of the entire system
should be 50%-100%.
When a heat pump ODU is employed and the AHU
control box is connected to AHU indoors: If no
common IDUs are also connected, the IDU/ODU
capacity ratio should be 50%-100%; if common IDUs
are also connected, the IDU/ODU capacity ratio
should be 50%-100%, that of the AHU control box
should be 0%-50%, and that of the entire system
should be 50%-100%.
When a heat recovery ODU is employed and the AHU
control box is connected to a FAPU, the unit can only
be controlled by the outlet air temperature. The
FAPU capacity of the entire system should not
exceed 30% of the ODU capacity.
When a heat pump ODU is employed and the AHU
control box is connected to a FAPU, the unit can only
be controlled by the outlet air temperature. If no
common IDUs are connected, the IDU/ODU capacity
ratio should be 50%-100%; if common IDUs are also
connected, the FAPU capacity of the entire system
should not exceed 30% of the ODU capacity.
When an AHU control box is connected to a mini VRF
ODU, only return air temperature control can be
selected (outlet air temperature control cannot be
selected)
The following parameters and restrictions stipulated in
Table 3-3 and Table 3-4 must be considered when
selecting the AHU control box. Otherwise, it may
adversely affect the ODU's service life, operating range,
and reliability.
Selecting an AHU control box that matches AHU:
If the total capacity of IDUs exceeds the rated
capacity of the ODU, the cooling and heating
performance may be reduced when IDUs are in
operation.
NOTE
Model
Setting
Cooling
Capacity
(HP)
AHU
Capacity
(kW)
Reference Air
Volume
(m³/h)
Max. air
Volume
(m³/h)
1x AHU BOX 200360+
1x AHU BOX 360560
AHU
Capacity
(kW)
Reference
Air Volume
(m³/h)
Max. air
Volume
(m³/h)
0.8
1
1.2
1.7
2
2.5
3
3.2
4
5
6
8
10
12
14
16
20
1.8-2.8
2.8~3.6
3.6~4.5
4.5~5.6
5.6~7.1
7.1~8
8~9
9~11.2
11.2~14
14~16
16~20
20~25
25~30
30~36
36~40
40~45
45~56
500
550
600
750
850
1000
1300
1400
1700
2100
2700
3000
3700
4500
5400
6000
7500
600
650
750
900
1000
1300
1800
2400
3000
3800
4300
5400
6400
7700
8600
9700
12000
AHU BOX
2290
AHU BOX
90200
AHU BOX
200360
AHU BOX
360560
Note: The evaporation temperature (cooling) is 6°C, the
ambient temperature is 27°C DB/19°C WB, and the
superheat degree is 5°C.
When the capacity of AHU exceeds 56 kW, up to four
AHU control boxes can be connected in parallel to one
AHU. See Table 3-4 for recommended parallel
connection methods.
Recommended
Parallel Combinations
2x AHU BOX 200360+
1x AHU BOX 360560
1x AHU BOX 200360+
2x AHU BOX 360560
3x AHU BOX 360560
2x AHU BOX 200360+
2x AHU BOX 360560
1x AHU BOX 200360+
3x AHU BOX 360560
4x AHU BOX 360560
2x AHU BOX 200360
1x AHU BOX 200360+
1x AHU BOX 360560
56~65
65~70
70~76
76~80
80~90
90~100
100~112
112~125
125~140
140~155
155~175
175~198
198~225
8200
9400
10200
10800
11800
13400
15000
16700
18700
21000
23700
26200
30000
14000
15100
16400
17200
19400
21600
24100
27000
30200
33400
37800
42700
48600
Table 3-3
Table 3-4
Internal
volume of
heat
exchanger
(dm³)
0.35~0.4
0.4~0.45
0.45~0.55
0.55~0.65
0.65~0.75
0.75~1.2
1.2~1.66
1.66-2.06
2.06~2.58
2.58~3.32
3.32~3.69
3.69~4.61
4.61~5.53
5.53~6.64
6.64~7.37
7.37~8.29
8.29~9.21
1x AHU BOX 200360+
1x AHU BOX 360560
1x AHU BOX 200360+
1x AHU BOX 360560
2x AHU BOX 360560
2x AHU BOX 360560
9.63~11.56
11.03~12.54
11.90~13.30
12.62~14.01
13.40~15.26
15.26~17.80
17.51~19.61
18.85~21.36
21.19~24.07
23.74~26.62
26.20~29.36
29.02~32.84
33.17~37.15
Internal
volume of
heat
exchanger
(dm³)