Safety Instructions; Parts Replacement Safety Instructions; Initial Preparation - Vaillant TURBOmax Plus SERIES Instructions For Installation And Servicing

Ensure that ALL regulations
are observed.
Fig. E.1: General
After installing replacement
parts, recommission and check
boiler function as described in
commissioning section.
PARTS REPLACEMENT

Safety instructions

The following safety
instructions are to be followed
when installing replacement
parts!
Important:
Before starting any maintenance
work:
Isolate the mains electricity supply
by disconnecting the plug at the
socket outlet (if there is only an
isolating switch remove the fuse
from the switch).
Turn off the gas supply at the gas
service valve fitted to the boiler.
When removing any water
carrying components ensure that
water is kept away from all
electrical components.
Always use new seals and O-rings
when replacing parts.
Always test for gas soundness and
always carry out functional checks
after any service work and after
exchanging any gas carrying
component.
Always check earth continuity,
polarity and resistance to earth
with a multimeter after any service
work and after exchanging any
electrical component.

Initial preparation

Turn off the boiler.
Isolate the electrical supply to the
boiler.
Remove boiler bottom cover by
undoing the four retaining screws.
Turn off the gas service valve.
Turn off the boiler CH service
valves.
Turn off the cold water inlet service
valve (TURBOmax Plus only).
Open control panel cover.
Lower electronic control box by
turning securing screws 90° and
lowering facia panel.
Remove front case by easing
forward at bottom front edge and
gently lifting off.
Release central heating water
pressure by draining the boiler
from the drain points provided.
(This needs only to be carried out
when detailed in these instructions).
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