Supply water temperature sensor and mixing valve
p. 21
Supply water temperature limit sensor
This feature is not available on the basic master’s version WLM2-1BA and WLM2-3BA
The limit sensor is directly connected to the master at the terminals marked limit sensor. Sensor
type ETF-1899A must be used.
The temperature sensor should be placed on the supply water pipe to the underfloor heating
system, If a limit sensor is installed, without a weather compensation module (WLOC) the master
will control the maximum water temperature. The factory default setting is 55°C, but this value can
be changed via the display.
If a weather compensation module (WLOC) is added to the system, the master will vary the supply
water temperature setting based on the outdoor temperature. A standard compensation curve
has been programmed at the factory. If needed the curve can be changed, see separate USER
MANUAL, MASTER TYPE WLM2.
Mixing valve actuator control
Control of a mixing valve actuator is possible using the digital masters WLM2-1FS and WLM2-3FS
The actuator must be 24Vac powered (max 6VA) and positioned via the 0-10V DC signal, and
should be configured so that it closes the valve if there is no heating demand (0Vdc signal). The
control signal can be reversed to 10-0V via the master menu system if required.
Control action of the mixing valve actuator is P + I and the parameters can be
changed if required in the master menu system.
Please contact the supplier for further instructions.
Fig 11
WLM underfloor heating controller
To Next Page
Loading...
Need help?
General
