7
Performance trouble shooter
If you are still encountering a heating issue, please complete section 1 and 5 and then return to DEVI.
Please provide description of all checks carried out, eg. position of floor sensor, checking of maximum floor
temperature etc. You will then be contacted as soon as possible.
The system is not heating up to the
required temperature, or there is no
difference in performance between
settings 6 and 10.
HEATING ISSUE
The floor temperature has
exceeded the maximum
temperature.
POSSIBLE CAUSES
Check the maximum floor
temperature is set correctly,
(see step 5 on pages 6 and 7).
ACTION
Check the positioning of the floor
sensor is correct. (Floor sensor should
be completely in the conduit either
parallel to deviheat element or
directly underneath devimat.)
Increase the available heating output
within the area by adding a
supplementary heating source.
Check the LO set-back is set correctly -
-15 for deviheat, -30 for devimat.
Reduce operating temperatures to
the following: deviheat -21º-24ºC, and
devimat (and all operating on floor
sensor only - wet areas, 4-7ºC)
Set the timer to come on at the
time when the heat is required,
(not before).
Ensure that the time periods required
are displayed on the thermostat and
all segments that are outside the
intended time period are clear.
Confirm that the floor structure is
standard throughout the floor/build.
Confirm that there is a heating
element beneath the area in question
and that the element has been
installed at the same Wm
2
density
across the floor.
Check the positioning of the sensors.
(Floor sensor should be completely
within the conduit, either parallel to
the heating element or directly
underneath the devimat. Air sensor
should be positioned away from any
external factors that influence the air
temperature surrounding the
thermostat and therefore causing the
system to switch off early.
Check electrical connections to the
thermostat (page 11 of the user
guide) and complete all visual checks
on page 4.
Press and hold the button so that all
segments around the outside are
filled, then quickly turn the dial anti-
clockwise.
With devimat systems there may not
be enough output to heat the area.
The temperature has lowered to the
set LO amount.
The system will aim to reach the
displayed temperature for the time
set. (devireg intelligence based on
previous performance).
The system is in manual mode.
It is not possible for the element to
heat up at variable rates. This is the
result of an external influence on
the system.
Eg. Different underlying floor or
different floor covering.
The air/floor sensors are not
reading the correct temperature.
This may be a fault caused by a
fault with the electrical
connections.
The thermostat will only switch off
in manual mode.
The system is heating outside the
time period. The time period is
indicated by the black segments
around the dial. (This may result in
high running costs).
The floor is heating up at variable
temperatures across the whole
floor.
The floor is heating above the
temperature required. (This may
result in high running costs).
The thermostat will not switch off
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