24
SERVICING & REPLACING PARTS – Page 24
4)
INSULATION (Continued)
f)
Carefully replace burner.
g)
Refit hot surface igniter WARNING this component is
fragile and requires careful handling.
h)
Replacement is the reverse of removal.
5)
BURNER
7)
FLUE HOOD/COMBUSTION CHAMBER SEALS.
a)
Remove combustion chamber/fluehood as described
in “Servicing Boiler” See Fig.17.
b)
Remove old seal.
c)
Clean groove Lising a soft brush or dry lint free cloth.
d)
Ensure new seal is correct (flue hood and combustion
chamber require different seals).
e)
Lay seal over groove and gently push into the groove
until fully home.
See
servicing instructions
for reassembly of boiler.
8)
INJECTOR
a)
Remove decorative and functional doors as described
in
“Servicing Boiler”.
FIG. 20 REMOVAL OF BURNER
a)
Remove combustion chamber as described in
“Servicing Boiler”.
b)
Remove 8 M5 screws retaining burner to the
combustion chamber. FIG. 20.
c)
Remove burner from the combustion chamber.
d)
Ensure the burner is fitted with the gasket supplied
with it.
e)
Taking care not to damage the burner surface, install
new burner into combustion and secure with 8
screws.
f)
Reassemble as described in section
“Servicing
Boiler”.
6)
SYPHON
a)
Remove decorative and functional doors as described
in
‘Servicing Boiler”.
b)
Remove fan see
“Servicing Boiler”
.
c)
Disconnect flexible condensate pipe from the rear of
the combustion chamber/sump casting. FIG. 16.
d)
Disconnect syphon from its wastepipe. See FIG. 11.
e)
Undo nut securing Syphon to the bottom of the boiler
casing.
f)
Relacement of the Syphon is the reverse of removal.
See servicing instructions for reassembly of boiler.
b)
Remove fan see
“Servicing Boiler”
.
c)
Remove injector by unscrewing from gas supply pipe.
d)
Replacement is the reverse of removal.
9)
GAS VALVE ASSEMBLY
Warning always ensure before filling that the
correct assembly is being used, they are provided
preset for different boiler outputs.
a)
Remove decorative and functional doors as described
in
“Servicing Boiler”.
b)
Remove fan as described in
“Servicing Boiler”.
c)
Disconnect electrical supply lead at the gas valve by
removing the two retaining screws and unplug.
d)
Remove 4 M5 screws securing gas control valve to
boiler service cock.
e)
Remove 6 MS screws retaining gas assembly
mounting plate 4 MS on the left underside of the plate
and two within the casing. Remove MS screw
attaching the valve to its mounting bracket.
f)
Slide gas assembly forward and remove from boiler.
g)
Remove flexible tube from assembly and fit to new
gas assembly.
h)
Replacement is the reverse of removal ensuring a
new gasket is fitted between casing and mounting
plate and the “0” ring seal is correctly positioned
between the gas control valve and the boiler service
cock.
Summary of Contents for envoy 30
Page 4: ...4 TECHNICAL DATA PAGE 4 FIG 2 GENERAL ARRANGEMENT ...
Page 28: ...28 FAULT FINDING CHART 1 Page 28 ...
Page 29: ...29 FAULT FINDING CHART 2 Page 29 ...
Page 30: ...30 BOILER INTERNAL WIRING Page 30 ...
Page 31: ...31 BOILER WIRING LAYOUT Page 31 ...
Page 36: ...36 Back Page ...
