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Application Guide / FLEXAIR-AGU-1505-E
HOT WATER COILS
A water coil made of copper pipe and
aluminum fi ns can be installed to answer
heating requirements. This water coil
can, for example, be connected to a
boiler or a heat pump. Two sizes of
water coils are proposed to cope with
the cooling and heating requirements.
The water coil is equipped with a 3-way
valve.
To check the different capacities of the water coils, please
refer to the section "Heating auxiliary performances" of this
application guide.
The hot water coil are protected from freezing by the Climatic,
through low enviroment protections based on low supply and
external temperatures, which activates safety procedures lcve
pump starts, valve opening or return air damper opening.
ELECTRIC HEATER
The auxiliary electric heater is made
of shielded resistance heaters, which
are smooth 6 W/cm2 resistances.
The heater is protected against high
temperature with a thermal overload
protection set at 90°C 150mm after the
heating elements.
For any rooftop unit size, two sizes of
electric heater are available as option, S (standard) and H (high).
F Box: 85 to 120 Kw
Standard heat : 30 kW, 2 stages
Medium heat : 54 kW, fully modulating (Triac)
High heat : 72 kW, fully modulating (Triac)
G Box: 150 and 170 kW
Standard heat : 45 kW, 2 stages
Medium heat : 72 kW, fully modulating (Triac)
High heat : 108 kW, fully modulating (Triac)
H Box: 200 and 230 kW
Standard heat : 72 kW, 2 stages
Medium heat : 108 kW, fully modulating (Triac)
High heat : 162 kW, fully modulating (Triac)
GAS BURNER
FLEXAIR FAM and FAG units are
fi tted with a gas burner. It is a safe and
reliable atmospheric gas burner made
of aluminized steel tube heat exchanger
designed to offer maximum heat transfer
and 92% effi ciency (PCI%).
It runs with natural gas 20 mbar and an
operating range of 13-26 mbar.
The standard gas module offers 2 stages
of control which helps in improving space comfort by avoiding
large supply air temperature deviations. Where more capacity
control is required a modulating version is available with high
heat burner models. With the modulating gas burner the airfl ow
rate in the burner is controlled as the gas fl ow is being reduced
maintaining the burner to its highest effi ciency level.
If required, an expansion device can be provided with the unit
allowing it to operate with gas pressures of up to 300 mbar.
Gas fi red rooftop cannot be installed inside a technical room.
F Box: 85 to 120 Kw
Standard heat (two stages): 60 kW
High heat (modulating): 120 kW
G Box: 150 and 170 kW
Standard heat (two stages): 120 kW
High heat (modulating): 180 kW
H Box: 200 and 230 kW
Standard heat (two stages) : 180 kW
High heat (modulating): 240 kW
2.1- AUXILIARY HEATING OPTIONS
2- OPTIONS DESCRIPTION
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