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Maintenance
6.2 Cleaning the boiler
Cleaning of the UltraOil
®
may only be carried out by
an authorised installer or by the Hoval customer ser-
vices.
Reliable and safe operation of an oil-fired boiler and
achievement of an optimum level of efficiency and
clean burning can only be guaranteed if the appli-
ance is maintained and cleaned on a regular basis.
An inspection and cleaning is necessary on an an-
nual basis. For this, it is recommended you conclude
a maintenance contract with the Hoval customer
ser vices, or with an authorised specialist dealer.
Where oil-fired boilers have been in operation through-
out a building stage, exposed to enhanced amounts of
dust, an inspection and examination of the contami-
nation is to be carried out once the building work is
finished, and if necessary cleaning must be arranged.
6.2.1 Preparations for boiler and burner clean-
ing
- Set the main boiler control switch to "0".
- Await standby mode / fan follow-on time
- Remove the front cover (1, fig. 14), lid (2) and side
walls (3) (see chapter 2.3, step 1-4).
- Remove lower front cover (4) (see chapter 4.4,
step 3).
- Remove base plate (5), by lifting it straight up-
wards and off.
- Undo the burner plug connections (burner cable,
cable remote control unlocking)
- Remove the corrugated pipe from the burner air
intake adapter.
- Undo the locknuts (6).
- Draw the burner with the boiler door (7) upwards,
turn it sideways and let it down again.
- Clean the burner.
- Remove the lid to the cleaning aperture (8).
The siphon must be cleaned once a
year. For cleaning the siphon the si-
phon bottom part (10 fig. 14) must be
removed.
- Clean the neutralisation box (9) (if fitted) as de-
scribed in chapter 6.4.
- The cleaning scraper included in the scope of de-
livery is suitable for cleaning the aluFer® pipes.
For a detailed description of how to clean the com-
bustion chamber and the aluFer
®
pipes see chap-
ter 6.3.
6.2.2 Re-assembly of the boiler
- Where installed, reattach the neutralisation box (9)
and the siphon bottom part (10) and fill with water.
- Replace the lid to the cleaning aperture (8)
- Firmly pressing in the fireproof cord between the
burner pipe and the door form-brick
- Grease the sealing cord before closing the boiler
doors
- Close the burner with boiler door (7)
- Tighten the lock-nuts (6)
- Reconnect the burner plug connections (burner
cable, cable remote control unlocking)
- Fit base plate (5), lower front cover (4), side walls
(3), lid (2) and front cover (1).
- Set the main boiler control switch to "1"
