Page 46 / 146
00BNO9061-L
VARMAX -
Installation, Use and Maintenance
Check the geometry of the arc electrode:
If deformed more than ±3 mm, replace the
electrode.
Re-assemble the electrode block(s). Tightening
torque of the block
fi
xing screws = 2.5 N.m.
7.5.
Siphon cleaning
Check the siphon and clean if necessary. The
siphon must be located between the main
exchanger and the condenser on the right-hand
side (it can be accessed via the hatch without
removing the side panel).
To do this:
• Dislodge the siphon by pulling it downwards.
• Clean with water.
• Re-assemble the siphon after checking the
presence and the possibility of free movement
of the
fl
oat (ball). Also check that the seal is not
damaged.
7.6.
Checking the combustion circuit's gas-tightness
Check the gas-tightness of the 3 service doors
using the foaming product. The areas to check are
shown on the diagram opposite.
The check must be performed when the boiler is
off, but with the ventilator operating at its maximum
speed (obtained by disconnecting the PWM signal
connector).
If a leak is detected, replace the seal with the
appropriate kit.
It is recommended to replace the seals each time
the exchanger service doors are removed. If they
are not replaced, do not cross the doors when re-
assembling.
fi
gure 36 - Geometry
Siphon
fi
gure 37 - Siphon
Hatch
seal checking
zone
exchanger
service door
(check the other
2 doors)
fi
gure 38 - Gas-tightness of the service door
13,8 mm
U0502274-#
U0502273-#
U0502275-#
