SYSVRF AHU S IOM

7
installation manual
7-4 Electric control box wiring figure
7-5 Indoor and outdoor unit wiring figure
CAUTION
CAUTION
SYSVRF AHU 5HP, 10HP, 20HP are applied one main control panel, the temperature sensor T1, T2 and T2B
must connect to the main control board before first powered on ；
T1 is indoor temperature sensor, install to the air inlet of the indoor unit.
T2 is indoor evaporator intermediate temperature sensor, install to the intermediate of temperature evaporatorz.
T2B is indoor evaporator outlet sensor, install to the outlet of the evaporator.
T2C is indoor evaporator inlet sensor, it has been installed before the product leaves the factory.
If two or more DX AHU box are parallel connected to control one indoor unit, only the master DX AHU box need to connect
T1, T2,T2B.
1
2
3
4
5
6
T2
T2B
T1
Connector
Indoor temp sensor (T1), indoor
evaporator intermediate temp sensor
(T2), indoor evaporator outlet temp
sensor (T2B), please connects respond
to the wiring nameplate.
T1
T2
T2B
Fig.7-5
If it is needed, user can select the backup function in the dotted line frame.
T2C
indoor power
Signal wire(P、Q、E)
Liquid pipe
Gas pipe
Liquid pipe
Water pump
Water level switch
T2(Intermediate se
-ction of evaporator)
T2B(Gas pipe outlet)
T1(Air-return inlet)
Outdoor unit
Outdoor unit
Indoor unit
Indoor unit
Fig.7-6
Fan wire
T1/T2/T2B
T1
T2
T2B
A
B
B
A
0# Master DX AHU
1# slave DX AHU
2# slave DX AHU
Signal wire (X、Y、E)
Signal wire(X、Y、E)