Vaillant Flue pipe Specifications download pdf (Page 42)

42 Instructions for installation and servicing ecoTEC 839592_12

- Correctness of electrical, water and gas connections.

- Correctness of the water pressure.

- The condition of the whole system, in particular the

condition of radiator valves, evidence of leakage from

the heating system and dripping taps.

• Correct any faults before proceeding.

7.1.2 Safety instructions

Danger!

Danger of life and limb by electric shock!

The supply terminals of the boiler are under

mains voltage even if the boiler main switch is

off.

• Don’t touch the supply terminals.

• Protect the electronic box from any water or

spray.

• Before working on the boiler, turn off the

power and secure against restart.

Note

If it is necessary to keep the electricity to the

boiler switched on for certain inspection and

maintenance, this is indicated in the description

of the maintenance task.

Always perform the following steps prior to inspection

or maintenance work:

• Switch off the main switch.

• Disconnect the boiler from the power mains by

- disconnecting the mains plug or

- de-energising the boiler via an isolating device with a

contact opening of at least 3 mm (e. g. fuses or

power switches).

• Further check for electrical isolation of the appliance

by use of a test meter.

• Close the gas isolator cock.

• Close the service valves in the heating flow and

return.

• Remove the front casing from the boiler.

• When removing any water carrying components

ensure that water is kept away from all electrical

components.

Always perform the following steps after performing

any inspection or maintenance work:

• Always use new seals and O-rings when parts are

replaced.

• Open the service valves in the heating flow and

return.

• Reconnect the boiler to the power mains.

• Switch the main switch on.

• Fill the heating circuit of the boiler to a pressure of

between 1.0 and 2.0 bar if required.

• Bleed the heating installation (see section 5.4, Filling

and bleeding the heating system).

• Open the gas isolator cock.

• Check the boiler for gas and water leaks.

• If necessary, refill and re-bleed the heating

installation.

• Replace the front casing to the boiler.

• Carry out a functional check of the boiler

(see section 6).

• Always check earth continuity, polarity and resistance

to earth with a multimeter after any service work and

after replacing any electrical component.

7.1.3 Checking the CO

concentration

Note

Checking/adjustment of the CO

concentration

is required in the following instances:

- replacement of gas valve,

- conversion to or from Natural Gas/LPG

- or if an incorrect combustion is suspected.

Fig. 7.1 Measuring the CO

concentration, specifying the air

ratio (gas setting)

Legend:

1 Main throttle

2 Screw

3 Air intake pipe

4 Flue gas analysis point

7 Inspection and maintenance

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 63 64

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Vaillant Flue pipe Specifications Page 42

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