IOM SYSVRF2 AHU BOX0620 20220209 134828067 20220209 140819162

16
Signal wire(P/Q/E)
1# slave
AHU
N# slave
AHU(N≤3)
Master
AHU
Master
AHU
Signal wire(P/Q/E)
N# slave AHU(N≤3)
Signal wire (X/Y/E)
Signal wire (X/Y/E)
Signal wire (X/Y/E)
T1,T2,T2A,T2B,TA
T1,T2,T2A,T2B,TA
The third party controller
The third party controller
The signal wire between outdoor and master AHU control box
Signal wire(P/Q/E)
Signal wire(X/Y/E)
The signal wire between master AHU control box and slave AHU control box
1# AHU
2# AHU
Factory controller
OR
Factory
controller
OR
Centralized controller
Outdoor unit
signal wire
(X /Y/E)
L1
L3
L2
L4
L5
L6
T2,T2A,T2B (optional)
Example of signal wiring(Heat pump)
L7
L8
Signal wire(P/Q/E)
Centralized controller
Outdoor unit
signal wire
(X /Y/E)
L1
MS BOX
Factory controller
Factory controller
The third party controller
OR
The third party controller
OR
1# AHU
2# AHU
T1,T2,T2A,T2B,TA
T1,T2,T2A,
T2B,TA
Signal wire(P/Q/E)
Signal wire
(P/Q/E)
Example of signal wiring(Heat recovery)
Note:
1. The diameter of the signal wire should be greater than or equal to 0.75 mm
2
, and the XYE and PQE signal wire should be
3-core shielding wire.
2. Maximum wiring length: L1<1200m; L2+L3<1200m; L4+L5<1200m; L6<1200m; L7<200m; L8<200m ;L9,L10,L11<1200m;
3. If the third party controller is selected to control the AHU box, the centralized controller cannot be connected to the system.
The system can only connect to the centralized controller if a factory controller is selected to control the AHU control box.
4. Connect the centralized controller to the ODU XYE terminal block. Do not connect the centralized controller to the XYE
terminal block of the AHU control box.
Figure 3-24
L9
L10
L11
L7
L7
Figure 3-23