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IHL_UDARA_2016_11_04_BEGB
6 Operating and setting
6.1 In
general
Multicalor Udara air heaters are very advanced
appliances where special attention has been paid to a
minimum energy consumption.
The appliance is equipped with a unique patented heat
exchanger made of stainless steel. The
fl
ue gases
are cooled down to produce condensate in the heat
exchanger. The additional heat that is released during
this process increases the ef
fi
ciency of the combustion
to unprecedented levels.
In addition, the power based on electricity has been
signi
fi
cantly reduced by using automatically controlled
fans with direct current motors. Even when the motor
speed is low, the ef
fi
ciency will continue to be high so
that it is better for the environment and your electric bill
will be lower.
The advanced burner management control system is
equipped with a gas-adaptive control. This means that
the ratio between the combustion air and gas is set,
monitored and, if required, adjusted electronically.
Thanks to this gas-adaptive control, you will always be
assured the best combustion quality even when the
gas quality is not constant.
The burner management control system monitors the
gas/air ratio under all conditions and will always adjust
this to achieve a safe and ef
fi
cient combustion.
This extremely modern control technology also ensu-
res that the gas/air ratio can be adjusted brie
fl
y so
that the appliance also ignites reliably under ice cold
conditions and after long periods of being idle.
Thanks to the gas-adaptive control, the Udara
appliance can reduce its capacity in a steplessly
variable manner to approximately 15% of the nominal
power.
This offers the best comfort in combination with a
modulating room thermostat: the difference between
the required and the current room temperature is
measured and, based on this, the optimum power is
determined to heat up the room quickly or to keep it
comfortably warm.
The air quantity will be adjusted automatically to the
discharge air temperature so that a pleasant indoor
climate and an extremely uniform temperature is
obtained.
The installer can set a low, average or high air
quantity. These air quantities are linked to a low,
average or high air temperature. This ensures you can
have high control over the blowing characteristics of
the appliance
6.2
Modulating thermostat RC21
We recommend using a Multicalor RC21 timer
thermostat to drive the appliance for simple household
applications.
1
2
3
4
Legend
Number
Meaning
1
RC21 thermostat LCD screen
2
Operating pressure button
3
Context button A
4
Context button B
This modulating thermostat exchanges data
continuously with the burner management control
system so that the good operation of the appliance,
the modulation degree and other appliance data of the
thermostat can be read.
The thermostat allows you to remotely start the fan.
You can choose whether the fan is not operational or
runs at a low, average or high speed (also see item
6.6).
The thermostat also allows you to unlock the appliance
if a locking fault has occurred.
The thermostat must, by preference, be connected
using a twisted and shielded 2-core cable. The polarity
is not important.
Pour en savoir plus, référez-vous au manuel fourni
avec le thermostat.
For more information refer to the manual that is
supplied with the thermostat. For demanding
applications such as, for example, connecting to a
building management system, the control of different
zones or connecting different appliances on
1 thermostat, the standard RC21 thermostat is not
suitable.
If you need this additional functionality, you can opt
for thermostats from the Multicalor Verventa range
that must, however, be connected through a specially
shielded bus cable of the following type: JY(ST)Y-MB
2X2X0.8 mm². You can request more information
about this from Multicalor.
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