Evolution EV HFDX
22
16
BOILER MAINTENANCE
To maintain the boiler in perfect working order, a yearly overhaul should be performed by
DOMUSA
TEKNIK
’s authorised personnel.
16.1
Cleaning the boiler
To keep the boiler in perfect working order, we recommend cleaning the boiler chamber,
exhaustion ducts and condenser on a yearly basis. A cleaning brush of a suitable size for cleaning
the inside of the exhaustion ducts is supplied with the boiler for this purpose. This brush is located
at the rear of the boiler, beside the condenser.
The combustion chamber and exhaustion ducts should not be cleaned using chemical products or
hard steel brushes. After any cleaning operation has been carried out, it is important to run several
ignition cycles to check all the elements are functioning correctly.
For correct cleaning, the following recommendations should be carefully observed:
Cleaning the boiler body
- Open and remove the outer door of the boiler.
- Remove the burner
(18)
by unscrewing the fixing nut on the top of the burner.
- Remove the combustion chamber door and the exhaustion duct cover, unscrewing the six
fixing nuts beside them.
- Clean the exhaustion ducts on the cast iron body, using the cleaning brush supplied with the
boiler.
- Clean the boiler combustion chamber. We recommend using a soft brush for scraping the
combustion chamber surfaces, and a blower to remove scale.
- After cleaning, replace the combustion chamber door, the exhaustion duct cover, the burner
and the outer door of the boiler.
Cleaning the condenser
- Remove the rear extension on the sides of the boiler to access the condenser on the rear of the
boiler body.
- Open the top cover of the condenser (1) to access its exhaustion ducts. To open this cover,
firstly release the two side closures (7), turn the locking plate (2) anti-clockwise and pull the
cover upwards to remove it.
- Remove the fume deflectors (6) inside the fume outlets.
- Clean the exhaustion ducts using the cleaning brush supplied with the boiler. Scale could fall
out of the lower condenser cover and come out of the condensation drain, and it is therefore
recommendable to pour water into the top of the condenser, for more effective cleaning. This
water will be automatically discharged through the condensation drain.
- To clean the outer part of the condenser cylinder, remove the three screws (3) and then remove
the metal ring (4). Take out the seal (5) and use the brush to clean it. Then put the components
back in place again and replace and tighten the three screws and the metal ring.
- If the lower condenser cover (9) needs cleaning, remove the side cover of the boiler to access it.
Firstly remove the bracket (8) holding it in place and pull on it to open it. Then pull the lower
cover down to open and clean it.
- After cleaning, replace the fume deflectors, the top condenser cover and the top outer cover of
the boiler. Then put the cleaning brush back inside the boiler.
- The condensation siphon should be cleaned once a year. To do this, remove it and wash it in
soapy water. Replace the siphon after cleaning.
