Recommendations When Firing Universal ''Stropuva" Boiler; Setting The Draft Regulator - Stropuva S7 Technical Passport, Installation And Maintenance Instruction

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When using pellets, saw dust briquettes, damp wood or other wood fuel or its residues, we
recommend using air supply ventilator (Fig. 2), and for enhancing burn stability we recommend
putting other fuel in between firewood layers in specific areas. Air supply ventilator (Fig. 2) is
necessary when using pellets, sawdust briquettes, coal and peat. Any type of fuel must always be
loaded through upper doors (8) (Fig. 1).
When using calorific coal, we recommend leaving air distributor in lifted position and when
half a load is left - to let it rest on the fuel. This will enhance the longevity of the air distributor.

RECOMMENDATIONS WHEN FIRING UNIVERSAL ''STROPUVA" BOILER

7.2
Air valve that lets air flow under fire grate (19) (Fig. 1) is controlled with the help of switch
valve (6) (Fig. 1) which is located on the boiler's top of the flue side. Switch valve has: a)
handle (bolt for fixing the primary valve position) and b) valve opening support (Fig. 11).
After loading coal, it is recommended to open the bottom doors (11) (Fig. 1) and to clean
small fallen coal pieces from the bottom through the fire grate (19) (Fig. 1). At the beginning, you
can also load smaller pieces of firewood on fire grate (19) (Fig. 1), so that small pieces of coal
would not be able to fall down to the bottom. Coal load must not be larger than up to the fuel
loading door (8) (Fig. 1). Put firewood (about 2 kg) on top of coal and ignite it.
After ignition, switch valve (6) (Fig. 1) must be lifted of the support – so that switch valve (6) (Fig.
1) would be closed and burning would proceed from the top. Depending on fuel type (various
briquettes, soft and hard coal, damp firewood, pellets) quality burn will last from 3 to 24 hours. Later
(when power is lacking) lift the switch valve (6) (Fig. 1) on support. After an hour check the smoke, if
it is black and thick, gradually close the switch valve (lower the bolt every 5 minutes) (6) (Fig. 1).
Smoke should be grey and clearly visible (after setting these parameters it can disappear).
TECHNICAL PASSPORT, INSTALLATION AND MAINTENANCE INSTRUCTION
ATTENTION!
7.3

SETTING THE DRAFT REGULATOR

Figure 15
Operation of this regulator is based
on the principle that while housing gets
hotter and expands, valve (1) closes
and when its housing is getting colder
valve opens.
After bringing the boiler into boiler
room ant connecting it to the piping of
heating system, check if parts of draft
regulator are not deformed. Bump of its
metal part (5) must be in the hole of
valve lever and the spike of temperatu-
re adjustment bolt (2) must be in recess
of lever. Recess and hole are close to
each other – 3,5 cm apart. Check if val-
ve completely seals the air vent (6) and
if the bolt that holds the valve is loose,
do not tighten it. Set the valve 3-5 cm
from air supply
supportive bolt and only then ignite the
boiler (Fig.15 B). When metal and water
opening using
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