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00BNO9061-L
VARMAX -
Installation, Use and Maintenance
INFORMATION:
The lengths of the ducts provided below are in linear metres (lm). The total
length of all ducts is reduced to a straight length (elbows having a straight
equivalence).
4.9.3.
On VARMAX 180 and 225
The type of gas is changed by replacing the
diaphragm located on the gas line.
Unscrew the 4 nuts (see opposite), then remove
the diaphragm in place (brass part).
Replace this with that provided with the boiler
(engraved B2P).
Screw the 4 nuts back in place.
Check the CO
2
settings (see § 7.7, page 52).
After changing the type of gas:
- Check the sealing of the gas line.
- Stick the label provided in place of the
original label (G20).
Note:
In order to facilitate the operation, the mounting
fl
ange located at the entrance to the gas line (on
the side nearest the network connection) may
require unscrewing.
4.10. Exhaust connection
Exhaust system works and national and prefectoral regulations must be
complied with.
A smoke temperature sensor guarantees the protection of exhaust ducts for
type B and C combustion products.
VARMAX boilers are approved to be connected to:
• a B23 chimney (all models)
• a B23P chimney (all models)
• a C13 air vent (models 120 to 225) except for propane gas (G31)
• a C33 air vent (models 120 to 225) except for propane gas (G31)
• a C53 air vent (all models) except for propane gas (G31)
4.10.1. Connection to a B23 chimney
Type B23 connection:
Air from the unit's premises, extraction of gases through the roof via a
fl
ue
with natural ventilation.
!
WARNING:
Check that there are top and bottom ventilations in the boiler premises,
that they comply with applicable regulations and that they are not
obstructed.
fi
gure 16 - Diaphragm
!
B2P
Diaphragm
orientation
Zinc-coated
engraving
towards the
spacer
nut (x4)
