Table of Contents
Advertisement
cHANGING PArTS
9.0
9.
cHANGING PArTS
9.1 GENErAL
A competent person must carry out replacement of parts. Before replacing any parts the boiler must be isolated from the mains electric
supply and the gas must be turned off at the service valve on the boiler. Unless stated otherwise parts are replaced in the reverse order
of removal. After replacing any parts always test for gas soundness and if necessary carry out a functional test of the controls.
For replacement of parts the front cover will need to be removed and the electrical/lower fascia panel will need to be dropped down
on the retaining strap after releasing the screw to the L.H. side using a pozi type screwdriver. When access is required to the boiler
compartment the inner casing panel will also need to be removed. The front cover is held with no locating pins at the top and no
retaining screws at the bottom. The retaining screws should be removed from the bottom using a pozi type screw driver and the panel
lifted clear of the locating pins. To remove the inner casing panel undo the eight retaining screws holding the inner casing panel using
a pozi screw driver. Take care not to damage the seal.
NOTE: The gas valve and venturi are a single assembly which is factory set and sealed. This must not be tampered with and
must be changed as a single assembly.
no. locating pins for front cover
Heat exchange / combustion
chamber
Flame sensing electrode
8 no. retaining screws positions for
inner casing panel:
Controller PCB
x8
1 - 6 no. retaining nuts for the
combustion chamber cover:
Spark electrode
Expansion vessel
Gas valve / Fan assembly
Hydraulic monoblock assembly
no. retaining screw positions for
front cover
Electrical / lower fascia panel
dropped down on the
retaining strap.
NOTE: to work on the panel itself
the strap should be retained but
this can be released to work on the
hydraulic monoblock assembly if
required
Page 3
x6
Advertisement
Table of Contents
