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5. MAINTENANCE
5.1. GENERAL REMARKS
It is recommended that the following inspections be carried out
on the boiler at least once a year:
1. Check the seals in the water group and, if necessary, replace the
gaskets and restore the seal to perfect working order.
2. Check the seals in the gas group and, if necessary, replace
the gaskets and restore the seal to perfect working order.
3. Visually check the overall state of the boiler.
4. Visually check the combustion and, if necessary,
disassemb
le and clean the burner.
5. Following inspection 3, disassemble and clean the
comb
ustion chamber, if necessary.
6. Following inspection 4, disassemble and clean the injector, if
necessar
y.
7. Clean the primary heat exchanger (see section 6.2)
8. Regulate the correct r
ate of flow of the gas: rate of flow on
ignition, partially loaded and at maximum load.
9. Check the correct functioning of the heating safety devices:
- temperature limit safety device.
10. Check the correct functioning of the gas group safety
de
vices:
- absence of gas or flame safety device (Ionisation).
11. Check that the electrical connections are correct (in
conformity with the instructions manual).
12. Check the efficiency of the production of domestic hot water
(test the rate of flow and temperature).
13. Carry out a general inspection of the functioning of the boiler.
14. Check the characteristics for expulsion of the products of
combustion.
15. Remove the oxide from the detection electrode by means of
an emery cloth.
CLEANING THE EXHAUST SIDE
Remove the combustion chamber inspection hatch (see section
6.3.5). Check that the exhaust passages between the blades of
the block are free; if there are deposits present, wash the blades
with compressed air, water or a vinegar-based detergent.
NOTE: it is possible to use a brush in order to mechanically
remove the residues.
Use of detergents:
- soak the blades well
- allow the detergent to act for about 20 minutes
- rinse with a strong jet of water to remove the deposits (the
control panel must be kept closed)
- make sure that there are no traces of detergents in the
exchanger.
CLEANING THE WATER SIDE
Use detergents that dissolve CaCO3. Leave to act for a short
time (in order not to damage the alumin
um) and then r
inse
.
Mak
e sure that the detergent does not remain inside the
exchanger.
Unscre
w the lo
w
er par
t of the condensate tr
ap and clean it.
Lastly
, fill it with w
ater and replace the stopper.
5.2. CLEANING THE PRIMARY EXCHANGER
5.3. CLEANING THE CONDENSATE TRAP
5.4. OPERATIONAL TEST
After ha
ving carr
ied out the maintenance oper
ations
, fill the
heating circuit to a pressure of appro
x. 1.5 bar and release the
air from the system. Also fill the domestic hot water system.
-
Place the boiler in oper
ation.
-
If necessar
y
, release the air again from the heating system.
-
Check the settings and the correct functioning of all the
control, regulation and monitoring parts.
- Check the seal and the correct functioning of the system for
e
xpelling fumes/dr
a
wing of comb
ustion air.
- Check that the boiler ignites properly and carry out a visual
check on the burner flame.
NB: if the boiler is not to be used for a prolonged period, the
condensate trap should be filled before igniting it again. A
shor
tage of w
ater in the tr
ap is dangerous because there is the
r
isk of e
xhaust fumes escaping into the air
.
IMPORTANT!!
Every time that the combustion chamber cover or the
primary heat exchanger is removed from the boiler, the
combustion chamber seal must be replaced (code:
65102217). The silicone grease provided with the
gasket must be spread around the area the gasket fits
to ensure an airtight seal.
Only the grease provided must be used, however,
should more grease be needed it must have a
temperature range of between –40 deg C and +200
deg C”
IMPORTANT!!
Every time that the combustion chamber cover or the
primary heat exchanger is removed from the boiler, the
combustion chamber seal must be replaced (code:
65102217).
The silicone grease provided with the
gasket must be spread around the area the gasket fits
to ensure an airtight seal.
Only the grease provided must be used, however,
should more grease be needed it must have a
temperature range of between –40 deg C and +200
deg C”
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