Hoval Uno-3 - Boiler Cleaning and Waste Disposal

82 4 213 563 / 03
MAINTENANCE AND INSPECTION
10. Cleaning
10.1 Limescale removal from the calorifier,
calorifier safety valve, taking out of
operation
Cleaning
Insu󰀩cient cleaning not only leads to increa
-
sed fuel consumption, it also shortens the ser
-
vice life of the boiler.
With oil ring systems, arrange for the boiler to be cleaned
by the chimney sweep according to national regulations.
The recommendation applies to oil-ring systems:
• For year-round operation: 2 cleanings per year
• For only winter operation: 1 cleaning per year
Removing limescale from the calorier
In areas with hard water, the calorier and the electric im-
mersion heater must be cleaned of limescale periodically
– in the interests of economical hot water supply.
The calorier is only allowed to be cleaned of limescale
chemically or using wooden/plastic tools.
If the water is very hard, get the plumber to check whe-
ther it would be worthwhile installing a water softening
system.
Calorier safety valve
To avoid damage due to excess pressure, it is recom-
mended for the safety valve to be check periodically by
the plumber.
Decommissioning
The following measures must be taken if the compact
heat station or the boiler is taken out of operation for se-
veral weeks:
Where there is a risk of frost, have the system drained as
prescribed by the heating specialist or add frost protec-
tion agent.
Your plant is equipped with electronic heating control; if
there is a risk of frost, a minimum room temperature of
5 °C is ensured when the plant is operational.
Recommendation:
Calorier check
The calorier should be checked every 3 ye
-
ars! You can conclude maintenance contracts
with the supplier for this purpose.
Oil tank check
The oil tank must be checked and cleaned ac
-
cording to legal regulations. Contact a specia
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list company to have the tank inspected.
Recommendation: check if your liability assu
-
rance will cover any damage caused by the
possible leakage of oil.
Boiler analysis
After 8 to 10 years of operation, a thorough
check by Hoval customer service is recom
-
mended.