5
3 Operation
4 Maintenance
At the front of the heating module housing there is
a LED indicator informing the user about the opera-
ting status of the heater and a temperature regulation
knob (Fig. 4). Blinking of the diode indicates the he-
ater operation.
Temperature setpoint adjustment is made manually
using the knob in the range from MIN (minimum set-
ting) to MAX (maximum setting). Temperature adjust-
ment range is 32-72 °C. For optimal life of the heater,
long-term operation at the maximum setpoint is not
recommended.
Fig. 4 Front of the heating module housing.
Temperature adjustment
Thermal protection
temperature
regulation knob
LED indicator
The condition of continuous operational readiness,
reliability and a long service life is a periodic overview
and maintenance.
Maintenance activities include:
• Making periodic inspections during which the
heating elements must be cleaned from scale. It
interfereswith theow ofheat whichincreases
power consumption and may damage the heating
element.
• Clean dirty surfaces with a damp cloth and cle-
aning agents.
The heating element is equipped with an integrated
temperature limiter (i.e. STB), which protects the he-
ater against overheating above 87 °C, and damage.
If the temperature limiter is triggered (the heating ele-
ment stops heating), disconnect the heating element
from the power supply and determine the cause of
operation of the limiter. To restart the heater, remove
the temperature regulation knob.
The button (reset) located underneath must be pres-
sedusingaat,thinscrewdriver.Putontheknoband
connect the heating element to the power supply. After
cooling the water to a temperature of approx. 65°C, the
heater returns to the normal mode. The reasons for
the temperature limiter operation may be water tempe-
rature rise above 87±7 oC caused, among others, by a
thermostat failure, supply of high temperature water or
overheating it from another source (e.g. coil pipe). Mo-
reover, water hardness in the part of the heating mo-
dule can also cause the operation of the STB limiter.
The electrical module must not be connected
to mains if the tank is empty or if the heating
element is not completely immersed in water.
If it is necessary to drain the tank (e.g. for the
risk of water freezing). rst, disconnect the
heating module from electrical power supply.
CAUTION
When using a dierent heat source (e.g. slo-
w-burning boiler) after the heating season,
check the correct operation of the heating
element. If malfunctions occur (the heater
does not heat), follow the steps described in
the chapter entitled „3 Service”, sub-chapter
„Thermal protection”.
CAUTION
Operation of the STB temperature limiter is a warning. Identify and eliminate the causes, then press
the „reset” button to return to default settings.
If after removing the causes of operation of the limiter and resetting it the problem persists, contact
an authorized service centre.
CAUTION
Lime deposits on the heating part may dama-
ge the heating elements. For this reason, it
is necessary to do periodic inspections and
clean the heating elements of the lime depo-
sits. Frequency of cleaning must be adjusted
according to own observations, taking into
account hardness of water in the system. Do
not clean the heater using strong chemicals,
as well as using sharp tools.
CAUTION
GB
Heating module
ME 0015 / 0020 / 0030
Chapter 3 |
Chapter 4 |
Operation
Maintenance
