9
1.8
Important instructions for the boiler
9
The boiler room should be well lit and the light switches
should be located outside the room itself.
9
Place any gas detection devices at a height conforming to
regulations in force.
9
Do not place devices like the water pump, the contactor,
etc., in the boiler room.
9
Repair or replace as soon as possible any electric locks, ca-
bles, etc., that could cause short-circuits.
9
Before carrying out any welding in the boiler room, switch
off the boiler and stop the flow of flue gases by closing the
gas valve.
9
The boiler room should not contain any explosive, combus-
tible or inflammable material.
9
The boiler room air should not contain any explosive, com-
bustible or inflammable gas.
9
Children or non-technical persons should not be allowed
in the boiler room, just the person who is responsible for it.
Keep a copy of the key for the boiler room in a safe place for
emergencies.
9
It is possible to insulate the boiler room against noise and
heat, also the position and the orientation of the boiler are
important for its acoustic insulation.
9
Place the fuel tanks in another room surrounded by walls
and with adequate natural ventilation.
9
Arrange for the creation of a diversion of the water supply
line near the boiler and a drainage system for draining the
boiler water.
9
It is strongly recommended not to install extraction systems,
air conditioning system or other devices that in the boil-
er room, as a secondary effect, could cause the so-called
"vacuum effect" and reduce the draught force of the boiler,
with the main consequence of damaging the burner.
9
Make sure that the boiler room receives sufficient air either
naturally or forced (using an aspirator).
9
To ensure the burner and the boiler work efficiently keep the
boiler room clean and prevent the formation of humidity.
9
The boiler room should have the minimum dimensions
specified.
9
Do not store inflammable material inside the room.
9
Do not touch the supply pipe fitting or other hot parts of the
boiler when it is running.
9
Do not install the boiler on a rubber mat.
9
When using LPG or another liquid fuel, the boiler room,
the fuel, the system components and the hydraulic pipes
need to be in conformity with the parameters established
by European standards and by gas supplying companies.
The company is not responsible for any faults or problems
caused by inadequate or insufficiently adequate conditions
for the boiler room, the hydraulic pipes and the other com-
ponents of the system.
9
Follow the instructions of the local gas suppliers.
1.9
Hydraulic system
Limescale and other chemical substances in the water can so-
lidify producing incrustations. To prevent this happening, equip
the system with a closed expansion tank. The water that en-
ters the closed expansion tank does not evaporate and is not
dispersed. In this way the level of water in the system is kept
constant and it will not be necessary to add fresh water. In ad-
dition, limescale and dust do not form and the system will have
a longer life.
− The water circulating in the system is not to be used for
washing or drinking.
− Do not take water from the system. If the water level is
low, top it up.
− To prevent damage due to limescale or chemical residues,
put water in the system with the following recommended
values: pH > 7.2 TH <25 °Fr. Check the water quality, and
if the quality of the water used does not meet the re-
quired requisites subject the water to suitable corrective
processes to obtain the required quality.
− To prevent the formation of limescale or sediments inside
the boiler or their passage from the boiler to the hydraulic
system, equip the system with suitable protections both
inside and on the outside.
− Connect the circulation pump to the boiler water outlet.
The power of the pump should be suitable for the boiler.
− Provide a 4-way mixing valve or a pump on the by-pass
section activated by a thermostatic control to raise the
temperature of the water in the return line.
− Provide a 3-way motorised valve connecting the supply
line and the return line of the heating system, to adjust
the flow rate of the water in the system according to the
desired performances.
− The amount of water in the system should be such that
there is always water in the boiler. Otherwise the boiler
could be subject to corrosion. If the boiler is not used in
winter, in order to prevent damage from freezing, use an
anti-freeze product, periodically measure the amount of
water in the boiler with a pressure gauge if it has a closed
expansion tank or with a water gauge if it has an open
expansion tank.
REFERENCE VALUES
pH
less than 7.2
Electrical conductivity
less than 200 μs/cm (25°C)
Chloride ions
less than 50 ppm
Sulphuric acid ions
less than 50 ppm
Total iron
less than 0.3 ppm
M alkalinity
less than 50 ppm
Total hardness
less than 25° F
Sulphur ions
none
Ammonia ions
none
Silicon ions
less than 30 ppm
The Thermostat (1) should be installed at a distance of 3-5 diam-
eters from the connection point to the return line.
D
1
3÷5
D
