26
GB
CONNECTION TO THE CHIMNEY
B 11bs-type appliances are open-cham-
ber versions designed to be connection
to a fl ue gas discharge duct which re-
leases fumes towards the outside; com-
bustion air is taken directly from inside
the room in which the water heater is in-
stalled. Flue gas is discharged through a
natural draught system.
This type of appliance cannot be in-
stalled in a room that does not meet the
ventilation requirements of applicable
regulations.
So that the normal operation of the ap-
pliance is not compromised, the place in
which it is installed must be suitable with
regard to the operating limit temperature
value and the appliance should be pro-
tected so that it does not come into di-
rect contact with atmospheric agents.
The appliance is designed for wall in-
stallation and must be fi tted onto a wall
capable of withstanding its weight. When
creating a technical compartment for
housing the appliance, leave suffi
cient
clearance around the module to ensure
easy access to its interior.
- The combusted gas fumes must be
discharged outdoors via a pipe of min-
imum diameter 80 mm fi tted into the
hood of the appliance as indicated in
the instructions and alternatives of ap-
plicable regulations.
- The fl ue must have a good draw.
- Avoid horizontal, downwards or con-
stricted sections of fl ue pipe, since
these can compromise the combus-
tion effi
ciency of the appliance.
- If the fl ue pipe is run through a cold,
unheated area, it should be fi tted with
an insulating jacket to prevent con-
densation forming.
- Never remove, modify or replace the
appliance’s hood, since it is an integral
part of the gas water heater’s combus-
tion system.
- The installation technician is alone re-
sponsible for installing the fl ue pipe
properly.
For correct gas-fi red water heater op-
eration, the fl ue gas hood must be po-
sitioned as shown in the fi gure. Avoid
absolutely any other type of installation
such as those illustrated below.
