© 2015 OJ Electronics A/S
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Thermal actuators are fitted to the underfloor manifolds and control the water supply through the various
loops. The voltage of the thermal actuators, 230V or 24V, must correspond that of the master.
WLM3-xBA masters are for 230V thermal actuators, while WLM3-xFSmasters/add-on modules are for 24V
thermal actuators. Up to 8 different zones can be controlled by the master. Connect the thermal actuator(s)
on the loop(s) for each zone to the corresponding terminals on the master. Thermal actuators for zone 1
must be connected to Output 1 terminals, thermal actuators for zone 2 must be connected to Output 2
terminals and so on.
guideline
More than one thermal actuator can be connected to the terminals of a single output, provided that the
heads are to be controlled by the same room sensor/controller.
Connect the brown wire to the L terminal, and the blue wire to the N terminal. When installation is complete,
check that the room sensor in, for example, room (zone) 1 operates the thermal actuator(s) on the manifold
intended for that room. If the actuators appear to be in the wrong position on the manifold, it may be simpler
to interchange them on the manifold rather than reconnect them on the master.
BR1025A12a
BR1025A12a
© 2015 OJ Electronic
A/
S
COOLING
SWITCH
-G
B
Timer
W/volt free contacts.
Open contacts
for night setback.
Ext. Switch
Fig. 8
From the factory, the master is supplied with a jumper in the switch/timer IO terminals. The current
operating setpoint of the master can be forced into night temperature by breaking this signal via an input
from an external switch or timer. The input must be a volt-free switch, and will need to open the circuit for
night temperature and close the circuit for day temperature. When the external switch or timer is used to
switch to night setback, this will override any time settings in the WLCT3 room controller, including any
room sensors that are part of a group allocated to that room controller.
External switch (timer) for night setback
installation
thermal actuators (thermoheads)
BR965A16a
Fig. 7
Summary of Contents for WLM3
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