Watts WFHC-MASTERH&C-BUS & SLAVE Guide Utilisateur page 13

Wiring recommendation for "Bus" Connection
- If the wiring distance between the thermostat and the WFHC-
MODULE-BUS is more than 10 meters you must use a Shielded
cable (Type "LiYCY" or equivalent, in this case the distance can
be along up to 25M).
If communication problem persist try to connect the shielded of
the cable with the minus point "-" on the both parts (Thermostat
and WFHC-MODULE-BUS)
- The cable must always be mounted alone in a separate electrical
conduit to avoid electrical perturbation.
- The cable between the WFHT-LCDH&C-BUS and the WFHC-
MODULE-BUS must be mounted at minimum 10cm distance to the
power supply cable (230Vac).
- If two WFHT-LCDH&C-BUS need to be managed by the same
Master thermostat WFHT-BASICH&C-BUS OU WFHT-LCDH&C-
BUSpay attention to the polarity of the connections.
WFHT-LCDH&C-BUS or WFHT-LCD-BUS
+ R/T -
Power Supply
230Vac 50Hz
13
WFHT-BASICH&C-BUS or WFHT-BASIC-BUS
+ R/T -
Up to 12 thermostats
3 3
- R/T + - R/T + - R/T +
- R/T + - R/T + - R/T +
+ R/T - + R/T - + R/T -
+ R/T - + R/T - + R/T -