Hoval UltraGas 1550, Technical Information Installation Instructions

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MAINTENANCE
11. Clean the premix burner inside and out with com-
pressed air or thoroughly flush with water.
12. Remove released dust and dirt particles with a vacu-
um cleaner (4, Fig. 27).
4
Fig. 27
Assembly:
13. Renew seal on gas connection:
- Seal on gas connection
- Seal for fan
- Seal for burner cylinder
14. Assemble burner in the reverse order.
15. Check for gas leaks
16. Carry out exhaust gas measurement according to
chapter 5.8
6.6.2 Cleaning the combustion chamber and
burner cylinder on the outside
CAUTION
Danger of chemical burns from cleansing
agents.
Wear safety gloves and protective goggles
when using cleansing agents.
Comply with the instructions on the original pa-
ckaging.
NOTICE
Damage to the plant by using incorrect clean-
sing agents.
Only use cleansing agents that are appro-
ved for gas boilers having aluminium com-
ponents.
Spray the cleansing agent on undiluted.
Ring spanner, screwdriver, spray gun
Preparation:
WARNING
The heat generator must be de-energised for
maintenance.
Set the blocking switch to “0” and disconnect
the heat generator from the mains (e.g. main
switch).
1. Close main gas valve.
2. Remove absorber hood.
3. Undo all burner plug-in connections.
4. Remove front cover.
Opening combustion chamber:
5. Unscrew palm grips
6. Swivel the burner upwards, with the boiler door (Fig.
28)
!
CAUTION
If a gas pressure spring is weakened, the
boiler door is lowered. There is an increased
danger of injury when reopening the boiler
door.
Notice:
In such cases, replace both gas pressure
springs.
7. Remove the cover from the cleaning opening (9, Fig.
29)
8. Remove the syphon or the neutraliser / condensate
box. (For maintenance of the neutraliser / condensate
box, see chapter “6.9 Maintenance for neutraliser /
condensate box for type KB 22, KB 23 and KB 24 (if
present)”.)
Fig. 28