© 2015 OJ Electronics A/S
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sEtting tEMPEraturE
With masters with display, temperature setpoints can be altered on the display.
Room sensors with manual adjustment are capable of increasing or decreasing the preset day and night
setpoints on the master by ±4°C for the heating zone they are controlling.
The WLCT3 room controller has its own day and night temperature settings that can be set separately. If
room sensors with manual adjustment are attached to its ”group”, these will operate according to the same
settings as the WLCT3. There will, however, still be the possibility of local ±4°C adjustment.
oVErriDE FunCtion
CHANNEL F OPERATION (Channel 15)
By fitting a WLTM3 sensor to a WLM3 system, and setting its hex encoder to Channel F, a single override
function can be used to override all the automatic time and temperature functions of the master, including
those areas independently controlled by a WLCT3 room controller. This can be especially useful for long
periods where override would be beneficial, including for example holidays and other periods of absence
where a frost protection temperature needs to be maintained.
By setting the WLTM3 in your system to Channel F, override could not be simpler. On the right-hand side of
the controller is a slide switch with four positions which determines system functionality:
AUTO
– This allows the system to run automatically according to the times set on the WLM3 master and
any WLCT3s
DAY
- This keeps the system running according to the ‘day’ temperature setpoint. Any WLCT3s, or sensors
controlled by them, will not be affected by this operating mode.
NIGHT
- This keeps the system running according to the ‘Night’ temperature setpoint. Any WLCT3s, or
sensors controlled by them, will not be affected by this operating mode.
OFF
– This effectively turns the system OFF, although a ‘Frost Protection’ temperature of 5°C will be
maintained in this operating mode.
If you would like these functions to be added to your existing system, please consult you installer or service
engineer.
EXtErnal tiMEr (see also “installation - External switch”)
The external switch or timer function on the master allows the whole system to be forced to use the NIGHT
setpoint.
The external switch must have volt-free contacts that are OPEN for the NIGHT setpoint, and CLOSED for
the DAY setpoint. The factory-fitted link wire should be removed when an external switch/timer is used.
If a WLCT3 room controller is used in a part of the system, using the external switch to select the NIGHT
setpoint will override the room controller.
special features
temperature and control
Summary of Contents for WLM3
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