Viessmann Vitodens 242-F Operations Instructions download pdf (Page 24)

Removing the front panels

See page 10, steps 1 to 5.

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 with hardness exceeding 300ppm (3.0 mmol/l), e.g. use a

small softening system for heating water (see Vitoset price list).

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

fill water.

Shown with connection set for finished walls (accessory)

1. Check the pre-charge pressure of the

diaphragm expansion vessel.

2. Close the gas shut-off valve.

3. Fill heating system via boiler fill &

drain valve

in the heating return

(at the connection set on the side or

above the boiler). (Minimum system

pressure > 1.0 bar).

Commissioning, inspection, maintenance

Further details regarding the individual steps

5418 193 GB

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Viessmann Vitodens 242-F Operations Instructions Page 24