2.4 EXact2 main board
2.4.1 Terminal board on Exact2 main board
The layout drawing below gives an overview of components (st accessory) that can be connected to
the terminal blocks.
Component
Terminal board
connection
Description
BUS
1 - 4
Bus for external parts
BUS
5 - 8
Bus for external parts
TE... + MVM
9 - 19
Used only for water heating coil HCW.
Fire
20 - 21
BT40, BT50, BT70
Smoke detector or other fire detection switch
AUX IN
22 - 23
Same function as Fire
EXT start
24 - 25
If this is closed, the unit will start up
If this is broken, the unit will stop
LSA
26 - 28
LS, exhaust air closing damper
LSAR, exhaust air closing damper with spring return
LSF
29 - 31
LS, outdoor air closing damper
LSFR, outdoor air closing damper with spring return
Alarm
32 - 34
General alarm
AUX OUT
35 - 36
Reserved for future use
3004524-2014-08-27
Installation of the VEX
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