EN • 32
664Y4200 • F
E
N
FR
R
U
P
L
DE
IT
ES
N
L
burner thread torque chart
thread torque
(nm)
description
Min.
Max
a
= Burner flange nuts (5 nuts)
5
6
b
= Burner tube screws (3 screws)
3
3.5
c
= Fan nuts (3 nuts)
3
3.5
d
= Gas valve screw (3 screws)
3.5
4
e
= Venturi screws (2 screws)
3.5
4
f
= Electrode screws (2 screws)
3
3.5
Shut off the gas supply before dismantling the burner.
1. Open the boiler’s front panel.
2. Disconnect the PWM jack plug and the fan’s 230 Volt plug.
3. Disconnect the gas valve’s jack plug.
4. Disconnect the ignition and ionisation cable from the “ESYS” rear panel,
see diagram below.
5. Unscrew the Ø 3/4" [F]
➊
gas coupling.
6. Unscrew the 5 nuts of the burner using a socket and ratchet; follow the
order of the diagram opposite to make the disassembly easier.
7. Carefully lift up the complete burner
➐
with the gas valve-venturi taking
care not to damage the insulation brick
➒
and remove it from the exchanger.
8. Check and replace the insulation brick
➒
if necessary and the seal
➑
before re-assembling the burner by following the above procedure
in reverse order.
commIssIonIng and maIntenance
dIsmantlIng the burner
➌
➍
➏
➎
➋
➊
➐
➑
➒
C
D
B
A
E
F
Solo
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