Operating instructions

Filling the heating system

Please note

Unsuitable fill water increases the level of deposits and corrosion and may

lead to boiler damage.

■ Thoroughly flush the entire heating system prior to filling it with water.

■ Only use fill water of potable quality.

■ Soften fill water harder than 300 ppm.

■ An antifreeze additive suitable for heating systems can be mixed with the

fill water.

1. Close the gas shut-off valve.

2. Switch ON the power.

3. Turn rotary selector "rt" anticlock-

wise for less than 2 s and then clock-

wise back to the control range on the

right.

Filling function is enabled. This func-

tion will end automatically after

20 min or after ON/OFF switch has

been turned OFF.

Commissioning, inspection, maintenance

Further details regarding the individual steps

5366 836 GB