13
5) External sensor input: NTC (only for Devireg™ 530
and™532)
Disconnect the external NTC sensor 5 and 6 on the
thermostat.
Connect an ohm meter to the NTC sensor wire, and
measure the ohm value (please refer to table on page
17 for correct ohm value).
e resistance measured should be within the speci-
ed range according to the technical specications.
If not, replace the NTC sensor.
4) Heating cable (terminal 2 and 4)
Disconnect the heating cable from terminal 2 and 4
on the thermostat.
Measure the resistance of the heating cable with an
ohm meter, it is now possible to calculate the
installed wattage, using the following formula:
An insulation tester must also be used to ensure there
is no leakage between the conductor and earth.
240
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