Robur Next-R, Инструкция по установке, использованию и техническому обслуживанию

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Features and technical data
Installation, use and maintenance manual – Next-R
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1 FEATURES AND TECHNICAL DATA
1.1
FEATURES
1.1.1 Available range
Next-R gas unit heaters are available in three versions:
▶
with horizontal fl ow, with axial fan (Next-R series)
▶
with horizontal fl ow, ductables, with centrifugal fan (Next-R
C series)
▶
with vertical down fl ow (Next-R V series)
Choosing the correct fl ow direction
Due to characteristics and positioning of internal com-
ponents, Next-R V vertical down fl ow gas unit heaters
cannot be used for horizontal fl ow operation, and vice
versa, horizontal fl ow gas unit heaters cannot under any
circumstances be used for vertical down fl ow operation.
1.1.2
Operation
The Next-R series gas unit heater is an independent heating ap-
pliance with airtight combustion circuit and forced air draft.
It has been designed to be installed inside the room to be
heated.
The combustion circuit is room sealed and meets the require-
ments for type C appliances: combustion air supply and fl ue gas
exhaust discharge take place outdoors and are ensured by the
functioning of a blower inserted in the combustion circuit.
The appliance is also approved for type B for installations where
it is allowed to take the combustion air directly from the room
to be heated.
The operation of the gas unit heater is controlled by a control
device (not supplied).
The gas unit heater can operate on two burner power levels,
with constant fan speed.
Products of gas combustion (natural gas or LPG) fl ow internally
through the heat exchangers, which are invested externally by
the air current produced by the fan, delivering hot air fl ow into
the room.
The fan operates automatically only when it receives the ena-
bling signal, depending on the model, from the fan thermostat
or by the electronic board timer, i.e. with hot heat exchangers, in
order to avoid the introduction of cold air into the room, and it
will switch o ff with cold exchangers.
The air fl ow direction is adjustable vertically by means of the re-
volving louvres of the grille.
If heat exchangers overheat due to malfunction, a temperature
limit thermostat cuts o ff the supply to the gas valve, thus inter-
rupting fuel fl ow and turning o ff the burner.
A blower upline of the burner mixes the air and gas and expels
the combustion fumes.
In the event of obstructions in the intake or exhaust duct, or in
the event of malfunction of the blower, the gas valve stops, thus
also interrupting the fl ow of fuel to the burner.
In summer it is possible to operate the fan only in order to pro-
vide a pleasant air fl ow within the room.
1.1.3
Mechanical components
▶
Pre-mix stainless steel burner.
▶
High head blower.
▶
Control board for brushless motor of the blower.
▶
Cylindrical stainless steel combustion chamber.
▶
Corrugated stainless steel heat exchangers with very large
exchange surface (R15, R20 models).
▶
Robur patented heat exchangers, made out of a special al-
uminium die-cast alloy, with horizontal fi nning on the air
side and vertical fi nning on the fl ue gas exhaust side, with
a very high heat exchange capacity (R30, R40, R50, R60, R80
models).
▶
External steel panelling with epoxy powder enamel fi nish.
▶
Axial fan(s) with high fl ow rate.
▶
Centrifugal fan (for the Next-R C series).
1.1.4
Control and safety devices
▶
100 °C limit thermostat with manual reset against heat ex-
changers overheating.
▶
Di ff erential pressure switch for controlling the correct opera-
tion of the blower (all models except R15, R20).
▶
Fan thermostat (for R30, R40, R50, R60, R80 models).
▶
Ventilation timer (for R15, R20 models).
▶
Gas solenoid valve.
▶
Controller for ignition, adjustment and fl ame control.