Dismantling The Burner; Burner Thread Torque Chart - ACV Solo 18 Installation, Operating And Servicing Instructions

commIssIonIng and maIntenance

dIsmantlIng the burner

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] gas coupling.
➊
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
care not to damage the insulation brick
8. Check and replace the insulation brick
before re-assembling the burner by following the above procedure
in reverse order.

burner thread torque chart

description
a = Burner flange nuts (5 nuts)
b = Burner tube screws (3 screws)
c = Fan nuts (3 nuts)
d = Gas valve screw (3 screws)
e = Venturi screws (2 screws)
f = Electrode screws (2 screws)
Solo
664Y4200 • F
with the gas valve-venturi taking
➐
and remove it from the exchanger.
➒
if necessary and the seal
➒ ➑
thread torque
(nm)
Min. Max
5 6
3 3.5
3 3.5
3.5 4
3.5 4
3 3.5
Excellence
EN • 32
➋
➎
➌
➏
➐
➑
➒
A
D
E
➍
F
➊
B
C