Carrier 50FC 020-099, Installation, Operation And Maintenance Instructions, Page: 55 / 80

55
12 - FACTORY OPTIONS AND ACCESSORIES
Important:
The sta
ff
responsible for the installation, operation
and maintenance of this burner must always strictly follow the
instructions given in this manual, as well as in the manufacturer’s
(APENGROUP) installation and maintenance brochure for the
burners in the PCH series, supplied with the unit.
Characteristics of the gas burner
■
Air is heated by contact with the surfaces of the combustion
chamber and the heat exchanger pipes.
- The heat exchanger complies with construction requirements
set by EN1196 regulations for equipment where combustion
gases produce condensate.
- The combustion chamber is entirely made of stainless steel
whilst surfaces of components where condensation occurs
(such as pipe bundle and exhaust hood), are made of AISI
441, in order to provide high resistance to condensation.
The following table illustrates the types of stainless steels
used:
• USA-AIS EN-No COMPOSITION
• AISI 430 1.4016 X6 Cr17
• AISI 441 1.4509 X2 CrTiNb 18
• The burner is entirely made of stainless steel with special
mechanical solutions to ensure optimal reliability and
performance levels, as well as high thermal and mechanical
resistance.
- The PCH heater is a modulating type; the thermal power
output and, therefore, the thermal capacity (fuel consumption)
vary according to the demand for heat. When the demand for
heat from the environment drops, the heater uses less gas,
increasing its performance up to 109% (performance on Hi).
■
Inherent safety:
- The performance increase at minimum power is achieved
by using a sophisticated air/gas mixing technique and by
adjusting at the same time the combustion air and the fuel
gas.
- This technology increase the heater safety as the gas valve
supplies the fuel according to the air
fl
ow. The CO
2
content,
unlike atmospheric burners, remains the same throughout the
heater operating range, allowing it to increase its performance
when the thermal power drops.
- If there is no combustion air, the valve will not supply gas;
if the combustion air
fl
ow drops, the valve will automatically
reduce the gas
fl
ow yet will keep its combustion parameters
at optimal levels.
■
Lowest polluting emissions. The premixed burner, in combination
with the air/gas valve, ensures a “clean” combustion by emitting
a very low level of pollutants.
■
The control located inside the burner housing allows the service
centre to check and view the working phases and identify any
faults that may have occurred.
■
The electronic control of the unit will only manage the burner
connection as heating support depending on the ambient
conditions.
Note: the main technical characteristics of the burner can be found
in the technical brochure.
Safety instructions
Safety instructions to be followed by the sta
ff
responsible for work
with this burner are described below.
■
General cautions
This burner module must be used only for the applications it
was designed for. Any other wrong or unreasonable use must
be regarded as improper and therefore hazardous.
During the installation, operation and maintenance of the burner
described in this manual, the use must always strictly follow
the instructions given in all the chapters of this operating and
maintenance manual.
The condensing warm air heater must be installed in compliance
with current regulations, according the manufacturer’s
instructions and by quali
fi
ed sta
ff
, technically specialised in
the heating
fi
eld.
When
fi
rst switched on, conversion between di
ff
erent types of
gas and maintenance operations must be carried out only by
sta
ff
provided by Service Centres authorised by current and
older regulations. For more information, please contact us.
The warranty conditions are speci
fi
ed on the warranty certi
fi
cate
supplied with this burner module.
The manufacturer declares that the unit has been manufactured
in compliance with UNI, UNI-CIG, CEI technical standards and
with all relevant legislation, as well as with the 90/396/EEC gas
directive and the later 2009/142/EC Directive.
■
Up to 3 values of total power available for each model:
Gas burner Pre-assembly roofcurb
50FF/FC 020 to 047 052 to 062 070 to 099
BAF (Low) PCH020 unavailable unavailable
BAM (Nominal) PCH034 PCH065 PCH080
BAS (High) PCH045 PCH080 PCH105
Attention: In compliance with the requirements of the
Gas Directive 90/396 EEC it is strictly prohibited to
alter the burner or the electronic control unit.
12.14 - Warm air heater module with gas burner
Natural or propane gas burner with modulating actuator, in
accordance with the Gas Directive 2009/142/EC, installed inside
a pre-assembly roofcurb. The 50FF/FC unit with lower supply will
be placed on this roofcurb.
EC certi
fi
cation: 0694CP1457.
Note: the gas burner is not compatible with the heat recovery coil.