© 2015 OJ Electronics A/S
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• The next numerical output on the WLM3 master MUST be used for the secondary/boost function.
• When the system is in cooling mode, 2-step control will be disabled.
• The 2-step controller is available in wired or wireless version.
NOTE: To avoid overloading the WLM3 master, we recommend that the secondary output is used as a
signalling function for a remote relay. See “Technical Specifications”.
It is possible to control domestic hot water temperature with a special WLCT3 mode called Hot Water
Mode, thus optimizing energy savings.See “Waterline Room Controller - Type WLCT3”.
A sensor is connected to the controller and measures the temperature in the hot water storage cylinder.
A zone valve is then controlled via the WLM3 master, which in turn activates the boiler on demand.
• The sensor (ETF) should be installed on the hot water take-off pipe immediately above the storage
cylinder. Use a fixing strap to attach it tightly to the surface.
• The WLCT3 should be installed in a convenient position for the user.
• With the WLCT3 in hot water mode, connect it to the WLM3 master using the sensor/controller bus.
• Connect the hot water sensor to the sensor terminals of the controller.
• Connect the hot water zone valve to an output on the WLM3 master and set the channel number on
the hot water controller to the corresponding number.
The hot water controller is available in wired or wireless version.
NOTE: When the WLCT3 is in hot water mode and heat is demanded, it does not start the circulating
pump of the underfloor heating system.
s
pecial functions
Hot Water Sensor
Type
WLCT3
BR1025A06a
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S
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24
23
22
+
+
+
+
51
54
53
52
+
+
-G
B
Remote sensor
for hot water
cylinder
WLCT3
hot water
mode
(Channel selector
set to output 1)
Sensor/controller bus
Sensor/controller bus
BR1025A06a
BR1025A21a
© 2015 OJ Electronic
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WLM3-BA/FS
MASTER
-G
B
BOILER
Hot
Water
Cylinder
BR1025A21a
Hot water mode
Summary of Contents for WLM3
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