Pr
e-hea
t/cool
Afterhea
ter
Alarm
Input
CO2
Aux
After
cooler
J6
J11
J7
J8
J9
J10
J12
J13
P
ow
er In
24VDC
24VDC
24VDC
12V
USB
Fail
OK
Status
Elec. PH
0V
0V
D+
D-
T
Fire
Therm
+
-
+
-
Input
Damper 1
Open
Open
Damper 2
ModBus
1
+
2
+
T1GTC
+16V
Standby
Switch
Hygro-
stat
Fail
Alarm
Filter
Alarm
+12V
SDA
SCL
TFAH
T2AH
T2AC
0 - 10V
0 - 10V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 - 10V
0 - 10V
J1
J2
J3
J4
J5
2
1
A
1
A
2
1
2
A
1
A
2
1
3
2
C
oi
l dri
ve
r
The input can be used to connect a standby switch to the ventilation unit.
■
Contact closed – ventilation unit in operation
■
Contact open – ventilation unit out of operation
If the system has been switched off over a longer period of time, this causes an increased risk of
condensation in the pipes, and / or might lead to moisture damage in the building.
6.4 Standby input
6 Wiring diagrams
Installation instructions / operating instructions – profi-air flat / flex connection box
8