Flexiheat FHSPN 35, FHSPN 70 Instruction Manual
1. General information
The Original Instruction Manual constitutes an
integral and material part of the product, and is to be
transferred to the user with the transfer of
ownership. It needs to be studied thoroughly and
retained for future reference, as all remarks included
in it provide important hints on safety during
installation, use and maintenance of the appliance.
The heating unit needs to be assembled and
installed with adherence to the standards in force in
the country of operation, according to indications of
the manufacturer, and operated by trained
professionals. Improper device installation might be
the cause of injury to people and animals and of
material damage, for which the manufacturer is not
liable.
The air heating unit may be used exclusively for the
purpose for which it was clearly designed. Any other
use shall be considered improper, and,
consequentially, hazardous.
In case of errors during installation, use or
maintenance that were caused by negligence in
terms of the law in force, of provisions in force or the
Original Instruction Manual (or any different manual
supplied by the manufacturer), the manufacturer is
not liable for any contract or other responsibility for
the arising damages, and the equipment warranty
becomes void.
The choice of heating units for heating buildings is
conducted based on a building thermal heat balance
sheet, with particular consideration of losses
stemming from the transfer of heat to buildings.
2. Foreseen use of the heating unit
The NPS series heating units are foreseen for
heating air in small to medium-sized rooms, in
buildings without a water-based central heating
system.
Thermal heat is generated as a result of combustion,
and the thermal energy is transferred through the
combustion chamber walls and the heat exchanger.
The air heaters are devices ideally suited for:
industrial halls, workshops
warehouses, shops, megastores,
additional burner - pellets) directly from the heat
exchanger tube to the outside environment,
without any intermediate liquid. During
combustion, smoke and other gases are
generated, which are ventilated by the chimney
line.
NOTE!
Due to the specifics of operation of the solid
fuel-fired air heater, operation supervision in
the form of operation parameter control is
necessary.
combustion chamber with thermal heat
exchanger (body)
covers
ash tray
cast iron grid
ventilator system
electric switch box with thermostat
air blower.
Thermal heat is generated as a result of combustion
in the combustion chamber, which is equipped with a
cast iron grid. The thermal energy is transferred from
the combustion gases to the ambient fresh air by
means of natural and forced convection.
The air and combustion gases are passed through
different ducts, which are welded and properly
insulated. The emerging combustion gases, after
cooling, are led out through a duct that must be
connected to a chimney or gas duct. The chimney or
gas duct diameter must be sufficiently large to
guarantee effective combustion gas removal. The air
used in the combustion process is taken directly
from the room or building being heated. For this
reason, it is of paramount importance to provide
appropriate ventilation for the heated room or
building that will guarantee the provision of an
appropriate volume of fresh air. The ash emerging in
the combustion process falls to the ash tray, from
which it can be removed without difficulty. The
heated air is distributed around the room through a
rotating blower, which is mounted in the top area of
the air heater.
The electric switch box with thermostat is
responsible for the assurance of electric energy to
the heater fan. When the heater outer casing
reaches the set temperature (35 °C), the fan is
switched on and warm air is distributed around the
room, in which the heater was installed.
3. Heater description
The FHSPN series air heaters are composed
of the following parts:
wholesalers
swimming pools, tennis courts, sports halls
exhibition tents, trade fair stands
religious sites.
The FHSPN series heater is a device generating
thermal heat through combustion of solid fuel
(wood, coal, following the installation of an
The ventilator is automatically shut down if the
heater casing cools down to less than 35 °C.
4. Fuel parameters
HINT!
The wood should be seasoned for at least a
year. Wood humidity exceeding 25% can
cause energy losses and damage to the
heater body.
It is permitted to use replacement fuels with different
quality parameters and of a different granularity as
additions to the basic fuel (up to 10% with respect to
the wood chunk volume), such as waste wood.
When burning small pieces of fire wood note that
they should be separated by large fuel wood chunks.
NOTE!
The NPS series heater is not a furnace for
burning waste, and fuel that is forbidden may
not be burned in it.
NOTE!
Permanent use of certain wet fuel types, with
simultaneous maintenance of low combustion
gas temperature (less than 160 °C) will cause
faster
wear of the heater body, corrosion of the
convection ducts, the flue and tar deposits in the
combustion chamber. This is caused by
condensation of the combustion products: water,
nitrogen oxides and sulphur oxides, which
together form a very aggressive environment
facilitating faster corrosion.
As replacement fuel there may also be used a mix of
nut coal of class 24/12 at 70% with coal dust of class
21/15 at 30% according to the standards indicated
above.
5. Heater technical data
Rated power
35 kW
70 kW
Power supply
230 V 50 Hz
400 V 50 Hz
Energy consumption
1.2 A
1.6 A
Fan air flow
5500 m3/h
12500 m3/h
Width
600 mm
780 mm
Length
1000 mm
1250 mm
Height with head
1400+500 mm
1720+550 mm
Combustion rack chamber dia.
450 mm
620-mm
Combustion rack chamber height
680 mm
860 mm
Smoke stack diameter
150 mm
180 mm
Weight
200 kg
280 kg
Ventilation head rotation
Yes
Yes
Fuel
Wood/coal
Wood/coal
Burner installation option
Yes
Yes
6. Heater transport and assembly
6.1. Transport and storage
The heater units are delivered assembled on pallets,
packed in film.
Use appropriate lifting equipment to raise and lower
the heater. Before transporting the heater, it should
be protected against shifting and tilting on the
vehicle platform by means of belts, chocks or
wooden blocks
The basic fuel for FHSPN heaters is fuel wood in
chunks. It should be seasoned under a roof for a
period of at least two years at a humidity level of 1520%.
Air heater FHSPN 35 FHSPN
70
As replacement fuel for FHSPN type air heaters,
energy coal may be used, nut type, classes 24/12,
type 31-2, according to standard PN-91/G-04510.
The indicated designation of 24/12 concerning fuel
characteristics determines the calorific value to be
approx. 24000 kJ/kg with an ash content of 12%.
This type of fuel guarantees the maintenance of the
declared power values.
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