6.2
Cleaning the boiler
The UltraOil
®
may only be cleaned by a licensed special-
ist 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.
Inspection and cleaning must be carried out annually. For
this purpose, we recommend that you conclude a main-
tenance contract with Hoval customer service, or with an
authorised specialist dealer.
In the case of oil-fired equipment already in operation
during the construction phase (where there is increased
occurrence 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
carried out.
6.2.1 Preparations for cleaning the boiler and burner
• Set the operating mode on the boiler controller to
„Stand-By“
• Wait approx. 1.5 minutes and then set the main switch
of the boiler controller to „0“
• Remove absorber hood (1, Fig. 42). To do this, release
lateral locking bolts (2) (turn approx. ¼ turn to the left
and pull out as far as the stop)
• Remove front cover of the boiler base (10, Fig. 43)
• Depending on the design, unscrew or remove siphon
trap (7, Fig. 43), siphon base section (8, fig. 38), siphon
support (8a) or neutralisation box (9, Fig. 44).
Danger: flue gas escaping through the si
-
phon can endanger lives (poisoning).
The siphon (page 31, Fig. 44, pos. 11) must
always be filled with water. The condensate
drain line must not be soiled or blocked.
•
Before replacing the siphon, fill it with wa
-
ter.
• Check whether the condensate drain line is
soiled/blocked.
• Undo the burner plug-in connections (burner cable, re-
mote reset cable).
• Release the lock nuts (4, Fig. 42)
• Pull the burner with the boiler door (3) upwards, turn it
to the side and lower it again
• Clean burner
•
Clean neutralisation box (9, Fig. 44 - if fitted) as de
-
scribed in chapter 6.4.
• For cleaning the aluFer
®
-pipes, the best tool is the
cleaning scraper available from Hoval (part no. 6022
844). For a detailed description of how to clean the
combustion chamber and the aluFer
®
pipes, see chap-
ter 6.3.
6.2.2 Re-assembling the boiler
• If applicable, reattach neutralisation box (9, Fig. 44) and
siphon/siphon base section/siphon support (7, 8, 8a).
• Attach the front cover of the boiler socket (10)
• Close the burner with boiler door (3, Fig. 42)
• Tighten the lock-nuts (4)
• Reconnect the burner plug-in connections (burner ca-
ble, remote reset cable)
• Replace absorber hood (1) and attach with locking bolt
(turn approx. ¼ turn to the right).
• Set the main boiler control switch to „I“
•
31
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MAINTENANCE
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