General Inspection And Maintenance Instructions; Safety Instructions - Vaillant ecoTEC exclusive 832 Installation And Maintenance Instructions Manual

8 Inspection and maintenance
8.1.1 General inspection and maintenance
instructions
To ensure the faultless operation, long term availability
of all functions and long working life of your Vaillant
boiler and to prevent modifications to the approved
series status only genuine Vaillant spare parts must be
used when carrying out inspection, maintenance and
repair work.
For an overview of the available original Vaillant spare
parts, contact the Vaillant sales office on
01634 292310.
During any inspection and maintenance or after change
of parts of the combustion circuit, the following must be
checked:
– The appliance has been installed in accordance with
the relevant installation instructions.
– The integrity of the flue gas installation and flue seals
is in accordance with the relevant flue installation
instructions enclosed.
– Visual, the integrity of the boiler combustion circuit
and relevant seals.
– The gas inlet working pressure at maximum rate as
described in Section 6.2.3.
– The gas flow rates as described in Section 6.2.2.
– 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.
40
8.1.2

Safety instructions

e
Danger!
Risk of death from electric shock through
contact with live connections!
The supply terminals of the unit are still live
even if the main boiler switch is turned off.
> Do not touch the supply terminals on the
unit under any circumstances.
> Protect the switch cabinet from water,
especially from being splashed.
> Before working on the unit, always turn off
the power supply to the unit and secure it
against being switched on again.
i
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 isolation valve.
> 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 100 and 200 kPa (1.0 and 2.0 bar) if required.
> Bleed the heating installation (see Section 6.1.1, Filling
and bleeding from the heating side).
> Open the gas isolation valve.
> Check the boiler for gas and water leaks.
> If necessary, refill and re-bleed the heating installa-
tion.
> Replace the front casing to the boiler.
Installation and maintenance instructions ecoTEC exclusive 0020017768_07