35
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MAINTENANCE
6.3
Cleaning the boiler
The UltraOil
®
may only be cleaned by a licensed specia-
list or Hoval customer service technician.
Reliable and safe operation of the oil boiler, optimum ef-
ficiency and clean combustion can only be guaranteed if
the unit is serviced and cleaned regularly.
!
WARNING
The boiler must be cleaned at least once per
year.
For this purpose, we recommend that you conclude a
maintenance contract with Hoval customer service, or
with an authorised specialist dealer.
In the case of oil-fired equipment already in operation du
-
ring the construction phase (where there is increased oc-
currence of dust), inspection should be carried out once
construction work has been completed to ascertain the
degree of dirt build-up. If necessary cleaning must be car-
ried out.
6.3.1 Preparations for cleaning the boiler and
burner
- Set the main boiler control switch to "0".
WARNING
The heat generator can only be de-energised
by disconnection from the mains (e.g. all-po-
le switch).
WARNING
All electric power supply circuits must be
switched off before accessing the terminals.
- Await standby mode / fan follow-on time
- Remove absorber hood
- Undo the burner plug-in connections (burner cable, re-
mote reset cable).
- Release all 4 boiler door lock nuts.
- Open the burner with the boiler door (51, Fig. 25, Fig.
- Clean the burner.
- Remove the combustion chamber unit
- Remove the cover from the cleaning aperture.
!
WARNING
The siphon must be cleaned twice per year.
In order to clean the siphon, the siphon base
section (50, Fig. 27) must be dismantled.
-
Clean neutralisation box KB23,KB24 (if fitted) as de
-
scribed in chapter 6.5. Also remove and clean neutrali-
sation box KB22 without granulate (if fitted).
- Unscrew the base section of the siphon (40, Fig. 11) to
catch the washing water.
- The cleaning scraper included in the scope of delivery
is suitable for cleaning the aluFer
®
pipes. For a detailed
description of how to clean the combustion chamber
and the aluFer
®
6.3.2 Re-assembling the boiler
- Where applicable, reattach the neutralisation box and
siphon base section and fill with water.
- Fit the cleaning aperture cover.
- Install the combustion chamber unit
NOTICE
Make sure the assembly is correct during
installation – securing in the aluFer
®
pipe is
4210258_BrennkBrennkammereinsatz
A
A
1 9
~
52
Fig. 24
- Close the boiler door, tighten the lock nuts evenly
- Plug in the burner plug.
- Set the main boiler control switch to "1"
- Measure combustion. If necessary, adjust the setting.
Make a record of the measurement.
6.3.3 Cleaning the boiler room
The boiler room must be kept clean and free of dust!
NOTICE
Point out to the customer that the boiler room
must be kept clean.
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