TERMA KTX 4 Blue Gebrauchsanweisung Seite 38

Actual working time meter
The unique feature measuring the actual working time of the heat-
ing element adds up the periods during which the device was using
nominal electric power (during standard operation the device regu-
lates the temperature and uses very little power thanks to the fact
that it turns itself off for longer periods).
It can be checked at any time how much electricity has been used,
ie. during all day's operation. In practice it turns out to be up ta
few dozens of percent less!
38 User Manual - KTX 4 Blue electric heating element
1. Meter reading:
Press and hold the button — the display panel will show let-
ter E followed by 4 digits separated by a hyphen (actual oper-
ating time of the device), ie. E..0..2..-..1..5 means that the de-
vice was actually working for 2 hours and 15 minutes from the
last time the meter was zeroed.
2. Meter resetting:
Press and hold the button until E 00-00 comes up.
The number displayed on the meter reflects the actual energy con-
sumption, therefore you can measure the actual cost of energy used
by multiplying the number on the meter by the nominal heating
output of the heating element and the price of electricity (1 kW).