Specifications

Inspection and maintenance
Instructions for installation and servicing ecoTEC 839592_13 51
7
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 5.9.3.
- The gas flow rates as described in section 5.9.2.
- 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.
> C
orrect any faults before proceeding.
7.1.2 Safety instructions
a
Danger!
Danger of life and limb by electric shock!
T
he 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.
i
If it is necessary to keep the electricity to the
boiler switched on for certain inspection and
maintenance, this is indicated in the descrip-
tion of the maintenance task.
Always perform the following steps prior t
o inspection
or maintenance work:
> S
witch off the main switch.
> Disconnect the boiler from the power mains by
- disconnecting the mains plug or
- de-ener
gising the boiler via an isolating device with a
contact opening of at least 3 mm (e. g. fuses or
power switches).
> F
urther 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 main
tenance work:
> Alw
ays 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) 0.1 and 0.2 MPa 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 installa-
tion.
> 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 CO2 concentration
i
Checking/adjustment of the CO
2
concentra-
tion is required in the following instances:
- replacement of gas valve,
- conversion to or from Natural Gas/LPG
- or if an incorrect combustion is suspected.