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• If a dehumidifier is used, it can be connected via a relay using output 1 on the master and setting DIP-7
to “ON”. (NOTE: This output gives either 24V AC or 230V AC depending on the type of WLM3 master.
Channel 1 cannot be used for a room controller in this situation.)
• When cooling is enabled, the cooling setpoint will be determined by the master and will override the
settings of any room controller to ensure optimum energy efficiency. (The cooling setpoint will be +3°C
above the master's day setpoint.)
Where a radiator circuit is used, it is possible to control room temperature with a
special WLCT3 mode called Radiator Mode, thus optimizing energy savings. See
“Waterline Room Controller - Type WLCT3”.
The controller measures the temperature in the room, and a zone valve is then
controlled via the WLM3 master, which in turn activates the boiler on demand.
• The WLCT3 should be installed in a convenient position for the user and where
the temperature is representative of the room or area.
• Connect the controller to the WLM3 master using the sensor/controller bus.
• Connect the radiator zone valve to an output on the WLM3 master and set the
channel number on the room controller to the corresponding number.
• The special radiator controller is available in wired or wireless version.
NOTE: When the WLCT3 is in radiator mode and heat is demanded, it does not
start the circulating pump of the underfloor heating system. When the system is in
cooling mode, all radiator circuits will be off.
s
pecial functions
Type WLCT3
Type WLCT3
radiator mode
2-step mode
BR1025A22a
BR1025A22
a
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WLM3-BA/FS
MASTER
-G
B
STEP 1
STEP 2
BOILER
Additional heat
source in the room
like a radiator
BR1025A20a
BR1025A20a
© 2015 OJ Electronic
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WLM3-BA/FS
MASTER
-G
B
BOILER
Radiator
It is possible to control a secondary heat source in a room (e.g. a backup radiator)
using the special 2-step mode of the WLCT3 controller. See “Waterline Room
Controller - Type WLCT3”. In addition to the primary underfloor heating output, 2-step
mode is able to control a second output as a boost function. This output will only be
activated if the required temperature cannot be achieved by the underfloor heating
alone within a preset time period.
• The WLCT3 should be installed in a convenient position for the user and where the
temperature is representative of the room or area.
• Connect the controller to the WLM3 master using the sensor/controller bus.
• Set the channel number on controller to correspond with the output on the WLM3
master that is connected to the underfloor heating actuator.
Summary of Contents for WLM3
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