SYSVRF AHU S IOM

10
installation manual
9. CONTROLLER SELECTION
The DX AHU box can be controlled by SYSTEMAIR controller and
SIEMENS controller. The status of SW3 on the main board will
decide which controller has been selected.
1 2
ON
SW3
means to connect SIEMENS controller
means to connect
SYSTEMAIR controller
1 2
ON
SW3
Fig.9-1
Note, After changing the status of any dial switch on the main
board, be sure to turn off the total power switch and then switch
on. The setting function can not be carried out if not to turn off
the total power switch and then switch on.
9-1 SYSTEMAIR controller
When SYSTEAIR controller has been selected, the DX AHU box can
be controlled by wire controller or remote controller.
Remote controller
Fig.9-2
Wire controller
Fig.9-3
Note, When
SYSTEMAIR controller has been selected, the DX AHU box
main board will not response the signal from SIEMENS controller.
9-2 SIEMENS controller
The detail instructions for wire controller and remote controller
please refer to the operation manual separately.
When SIEMENS controller has been selected, only SIEMENS
controller can be use to control the DX AHU box. The signal from
SYSTEMAIR controller will not be responsed except the address
set and inquire signal.
Even if SIEMENS controller has been selected, a
SYSTEMAIR
remote controller or wire controller is need to set address for DX,
AHU box, because SIEMENS controller do not has this function.
9-2-1 Wiring figure
The wiring figure please refer to figure 9-4, there have three
points need to be pay attention.
1.The distance between SIEMENS controller and DX AHU control
box should less than or equal 15 m.
2.If several DX AHU boxes parallel connection control one indoor
unit, SIEMENS controller only need to be connected with master DX
AHU box.
3.One SIEMENS can not control two or more indoor units at the
same time.
9-2-2 The definition of signal between
SIEMENS controller and DX AHU box.
1. Signals from SIEMENS controller to DX AHU box.
Signal
Temp. set
ON/OFF
Cool mode
Heat mode
Fan status
Signal
type
Analog
voltage
Dry
contact
Dry
contact
Dry
contact
Dry
contact
Specification
Port
Y1-M
54-53
44-43
34-33
14-13
0~10VDC
please refer to table. 9-3
close means ON
disconnect means OFF
close means cool mode
disconnect means no cool signal
close means heat mode
disconnect means no heat signal
close means fan ON
disconnect means fan OFF
2. Signals from DX AHU box to SIEMENS controller.
Signal
Alarm
Defrost
Run status
Signal
type
Dry
contact
Dry
contact
Dry
contact
Specification
Port
D4-M
D3-M
/
close means defrosting
disconnect means no defrost
close means running
disconnect means off
close means no alarm
disconnect means alarm
3. Communication ports on the main board.
Table.9-1
Table.9-2