Viessmann VITOPEND 100-W Installation And Service Instructions Manual page 21

10.5 to 24 kw and 13 to 30 kw. gas fired central heating and combi boilers for open flue operation. natural gas and lpg version

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Further details regarding the individual steps

1. Switch OFF the control unit ON/

OFF switch (the boiler shuts

down).

Turn rotary selector "tr" fully

anti-clockwise.

Release the screw inside test nip-

ple A, but do not remove it; then

connect the pressure gauge.

4. Open the gas shut-off valve. Start

the boiler.

Commissioning, inspection, maintenance

(cont.)

Turn rotary selector "tw" fully

clockwise (leave at that position

briefly), then turn it back.

LEDs "tw" and "tr" flash

simultaneously.

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