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4.16
MAINTENANCE OF THE HEATING SYSTEM AND THE BOILER
It is necessary to check, eventually to refill the water in the heating system at least 1x in 14 days.
If the boiler is out of order during the winter period and the water could freeze in the heating
system, then the water should be replaced with an antifreeze mixture approved by the producer
or it should be discharged out of the system. Normally should be the water discharged only in
urgent cases and for ash short time as possible. At the end of the heating season it is necessary
to clean the boiler properly and to replace the damaged parts. Twice a year it is necessary to
dismantle the fan, to clean the radial impeller and to clean the fan air chamber.
Exchange of the sealing cord of the door
Undo the worn sealing cord by the screw driver and clean the groove, where it was laid. Take the
new sealing cord and put its ends into the horizontal parts of the groove. Use your hand,
eventually a hammer to press the cord into the groove around the door.
Adjusting the hinges
After a particular period is the sealing cord in the door pressed. To ensure its tightness is
necessary to change the position of the door by screwing the door hinges. The feeding door and
the bottom door are fixed to the boiler body by two hinges that are connected to the door by
a long joint. To adjust the hinges, it is necessary to remove the joint and to turn and to screw the
joint. Fix the door and put the joint into the hinge.
Replacement of the nozzle
The nozzle is laid in the boiler body on the holder. In the bottom part is the nozzle sealed by
a boiler sealant and in the upper part there is a sealing cord around. When replacing the nozzle,
remove the sealing cord from the groove by a screw driver. Take the nozzle out and clean the
holder properly from tar and old sealant. Then treat the bottom part of the nozzle with the
fireproof sealant and put the nozzle on the clean holder with the arrow towards the rear boiler
part. There should be the same space on the both sides of the nozzle. Take the new set of the
sealing cords for the nozzle and press it lightly into the gap just around the nozzle.
Adjustment of burning in the boiler
The burning is adjusted by the primary and secondary regulation flap. Producer sets the boilers
to the optimum conditions of burning with reference to the emissions and flue gas temperature.
Only the service staff trained by producer can make the adjustment.
Optimum setting of the regulation flaps:
Primary / secondary air flap in [%]:
DPX15
– 100/25
DPX25
– 50/40
DPX30
– 50/
25DPX35
– 50/50
DPX40
– 100/60
DPX45
– 100/60