24
Gasifying boiler Vigas
15. BOILER MAINTENANCE AND REPAIRS
15.1 DOOR SEAL
15.2 CHIMNEY FLAP TIGHTNESS
15.3 Heatproof nozzle
15.4 FLAP & SERVO-UNIT POSITION SET-UP FOR VIGAS BOILER
Lambda Control
The contrac
tor provides regular checks and boiler maintenance. During operation it is important to check
water pressure, door seals, chimney flap tightness, exchanger cover and seal, flue cleanliness
Before boiler is shut-down for the
summer season, clean combustion chamber thoroughly, do not leave
any condensed moisture inside and open bottom door and chimney flap.
The boiler door is stabilized in 3 ways –
two rotary pins and a door catch. If the
door does not fit tightly, it i
s also possible to fix it from the hinge side. Slightly
turn hinge to release and turn by hinge screw and then move door in desired
direction. To change gasket 1 points out the place, where gasket is joined.
The heatproof nozzle is a block made of heat-
proof concrete and its use is to to
mix gases with secondary air to ensure efficient burning.
on the water cooling rack. The nozzle is surrounded with heat-
the same height as the nozzle. The life of the nozzle is dependent on
result of fuel loading or stoking the fire. Therefore, the
nozzle is considered as a spare part. Cracks noticed on the nozzle are not a
reason to change the nozzle. It is only necessary to change the nozzle if it is
dropped or is broken. Remove the pieces of the broken nozzle and replace with
a new nozzle ensuring that it is inserted and fits into the opening.
When cleaning exchanger pipes (pic.3/24) make sure that the flap area is clean, as well as the flap itself.
(pic.3/16). Leakage can decrease boiler performance.
unplug line connector from the power supply 230V/50Hz,
Step 2: loosen screw „1“ with spanner,
Step 3: using a spanner turn the axle (which must turn easily!) anti-
clockwise „2“
to maximum position. Visually check the flap
motion through the window „3“.
Step 4: tighten scew „1“
Step 5: plug in power lead to power supply 230V/50Hz.
It is very important that the servo-unit and flap are in the correct positi
on to control primary and secondary
air in the burning process to ensure minimum emissions. To position the servo-
unit and flap follow these
steps:
When the power lead is plugged in, the power supply to the servo-
unit will start automatic initialization,
which is also shown on the display. During this initialization servo
f using brown coal as fuel, cleaning will be the same as a wood burning boiler. Clean fuel bunker with
cleaning flap (12) pic.3 and ash-drawer as follows:
1. Open bottom door (15) pic.3, insert drawer and close the door.
2. Open cleaning flap and upper door (2) pic.5.
3. Use relevant accessory to pile up ash from fuel bunker area into drawer
4. Wait a moment, open bottom door, take out drawer and close the door.
ATTENTION:
Do not leave ash-drawer inside the boiler VIGAS 29 UD during use.
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