13
INSTALLATION AND OPERATION MANUAL
Do not forget to keep the returning
water temperature as high as possible, at
least 65°c or even higher! It is necessary
to assure that a thermometer is installed
on the returning water pipe, in order to be
able to observe this temperature at any
time!
• InsTallaTIon of THe boIleR
RooM
The boiler room should be ventilated. The required air inflow necessary for combustion should be also ensured. For this
purpose, boiler room doors should have ventilation grating or there should be a sufficient gap between the doors and the
floor. If there is no possibility to supply air in from another rooms or the house is very tight, it will be necessary to install an
opening in the exterior wall. The cross-section area of the opening should be at least 0.001 m2/kW.
Place the boiler as close to the flue as possible on a hard concrete levelled basement. Leave at least 600 mm gap between the
backside casing of the boiler and the room wall for boiler servicing and cleaning. The smallest distance between a lateral casing
of the boiler and a building structure is 400 mm. If the building structure is made of flammable materials, this distance should be
doubled. A freely approachable space of at least 800 mm should be then left from the opposite side of the boiler to ensure access
to the backside of the boiler, for its servicing and cleaning. The floor under the boiler, within the distance of 50 cm in front of it and
within the distance of 30 cm around the boiler should be made of inflammable materials. Screw supporting legs onto the base
of the boiler and level the boiler with screw nuts using a level; then connect the heating system circulation pump to the boiler.
The smoke exhaust pipe of the boiler should be connected to the chimney through a metal duct. The internal diameter of
the metal connecting duct should be at least the same as the external diameter of the smoke exhaust pipe of the boiler. To
improve the draught, the connecting duct between the boiler and the chimney should be installed at an inclination towards
the boiler. All junctions should be carefully tightened using a heat-resistant material and insulated using thermal insulation.
If an additional damper is installed between the boiler and the chimney for the draught control purpose,
the damper should not close more than 2/3 of the cross-section area of the opening in its fully closed position.
• ReQUIReMenTs foR THe cHIMneY
It is recommended to insert acid-resistant stainless steel liner, if the chimney is made from masonry. It improves draught of
the chimney and protects the masonry from destruction due to the impact of condensate. Internal diameter of the liner should
be no less than the external diameter of the smoke exhaust pipe of the boiler. The chimney liner can be round or oval. It is not
recommended to use rectangular-shaped liner as, due to the temperature fluctuations, its walls deform, gaps appear at the
element junction points, through which the condensate falls on the walls of the bricks chimney. Additional air is sucked in, which
reduces draught of the chimney. Draught for each boiler model should correspond to the referred value of draught in the table
“Technical data”. The liner should be factory made. Minimum permissible height of the chimney should be at least 7 m. The top
of the chimney should be above the ridge at least by 0.5m. If the chimney is further from the ridge than 1m, the angle horizon-
the ridge- the cap of the chimney should consist 10° or less degrees. Draught of the chimney can also be negatively affected by
various obstructions near the building: trees, hills, other buildings. Fig. 8 presents the recommended minimal angles between
the chimney, nearby objects and the horizon. Angles larger than those indicated will cause reduction of draught of the chimney.
The connection of other devices to the chimney to which the boiler is connected is prohibited.
The chimney should be cleaned at least once a year!
Difference of water temperatures
Δt, °c
Heating output, kW
50
80
Water flow, l/min
11
67
107
12
61
98
13
56
90
14
52
84
15
49
78
16
46
73
17
43
69
18
41
65