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Further details regarding the individual steps
Filling the heating system
!
Please note
Unsuitable fill water increases
the level of deposits and corro-
sion and may lead to boiler dam-
age.
■ Flush the heating system thor-
oughly before filling.
■ Only fill with water of potable
quality.
Commissioning, inspection, maintenance
■ Fill water with a hardness
above 300 ppm must be soft-
ened.
■ Antifreeze suitable for heating
systems can be added to the fill
water.
1. Close the gas shut-off valve.
2. Switch ON the power supply and ON/
OFF switch A.
3. Activate the filling function.
1. Press MODE and
ously and hold for approx. 3 s.
"SERV" is displayed and "0"
flashes.
2. Use / to set "I"
3. OK to confirm.
The filling function is enabled.
Note
This function terminates automati-
cally after 30 min or when the ON/
OFF switch is switched off.
simultane-
25
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