Filling The Water Heater; Draining The Water Heater - Truma Combi 4 E Instrucciones De Uso

Electrical operation fault
If a fault occurs during electrical operation the yellow indicator
lamp (g) on the power selector switch goes off.
Possible causes can be found in the troubleshooting list.
If the 230 V power supply is interrupted for just a brief
period of approximately 1 second during operation, the
heater will subsequently resume as normal.

Filling the water heater

Check if the rotary switch for the drain valve (FrostControl) is
set to "Operation", meaning that it is parallel to the water
connection and engaged.
Close the drain valve by pushing the push button until it
engages.
When the temperature at FrostControl is below about
7° C, first switch on the heater to warm the installation
compartment and FrostControl. After several minutes, when
the temperature at FrostControl is above 7° C, the drain valve
can be closed.
Switch on power for water pump (main or pump switch).
Open hot water taps in kitchen and bathroom, (set preselect-
ing mixing taps or single-lever fittings to "hot"). Leave the fit-
tings open for as long as it takes for the boiler to displace the
air and fill up, and the water to flow without interruption.
If just the cold water system is being operated, without
using the water heater, the heater tank also fills up with
water. To avoid frost damage, the boiler must be drained
through the drain valve, even if it was not operated.
When connecting to a central water supply (rural or city
mains), a pressure reduction valve must always be in-
stalled to prevent pressures above 2.8 bar from developing in
the water heater.

Draining the water heater

Switch off power to water pump (main or pump switch).
Open hot water taps in kitchen and bathroom.
In order to check the water that is flowing out, place an
appropriate container (capacity 10 litres) beneath the drain
valve (FrostControl) drainage muff (x).
Turn the rotary switch on the drain valve by 180° until it
engages, whereby the push button moves out and the drain
valve opens.
Check whether all of the water in the boiler (10 itres) has been
drained into the container via the drain valve.
There shall be no claims under guarantee for damage
caused by frost!
Maintenance
Only original Truma parts may be used for maintenance and
repair work!
The materials in the device that come into contact with water
are drinking water safe.
Bio-film, deposits and limescale must be removed using
chemicals to protect the unit from infestation by microorgan-
isms. Only chloride-free products must be used in order to
prevent damage to the unit.
14
The effectiveness of the use of chemicals to combat microor-
ganisms in the unit can be increased by heating the water in
the boiler to 70° C at regular intervals.
Move power selector switch to gas operation (d) to do this.
Move the rotary switch on the control panel to position
(I – summer operation) 60° C. The green (k) and yellow (p)
LEDs light up.
Once the water in the boiler has reached a tempera-
ture of 60° C, the burner will switch off and the yellow
LED (p) will go out. The unit must stay switched on for at
least 30 minutes and no warm water may be removed. The
residual heat in the heat exchanger will heat the water up to
70° C.
Fuses 12 V
The fuse is in the electronics beneath the connection cover.
Replace the unit's fuse only with an identical fuse.
Device fuse: 10 A – slow – (T 10 A)
Fuses 230 V
The fuse and the power supply lines must only be replaced by
an expert!
The unit must be disconnected from the mains
(all poles) before opening the electronic housing lid.
The fuse is in the power electronics (16) beneath the
electronic housing lid.
This fine fuse must always be replaced with a fuse of the
same type: 10 A, slow, interrupting capacity "H".
T 10 A
16
T 10 A