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IHL_UDARA_2016_11_04_BEGB
2 General information
2.1 Description
Multicalor Udara air heaters are gas-fi red condensing
and modulating appliances with a cleaner combustion,
automatically controlled direct current fans and a
gas-adaptive control.
2.2 Gas category
The appliance has been set for being fi red with natural
gas of the second family (I2N) ex-factory. If you want
to use the appliance with propane, the burner
management control system must be adjusted and a
new nameplate must be added to the appliance. Only
an engineer appointed by the manufacture can do this.
The appliance is delivered ready for use. It is
suffi cient to connect the fl ue gas outlet (FGO) duct,
the combustion air supply (CAS) duct, the gas pipe,
the condensate discharge, the air ducts and the power
lines.
2.3 Standard version
The standard version of the appliance is used for the
distribution of recycled air to which no more than 25%
of outdoor air is added or for the distribution of outdoor
air to heat recovery. The appliance will work in this
mode ex-factory.
2.4 Outdoor air version
The outdoor air version of the appliance is used to
distribute air to which more than 25% of outdoor air is
added.
Warning!
If the appliance is deployed as an outdoor air
version, you must perform the changes specifi ed
below to prevent damaging the appliance.
If you want to deploy the appliance as an outdoor air
appliance, you must order an additional insulation
set to insulate the fan compartment of the Udara air
heater. This will limit condensation on the outer
housing of the appliance.
In addition, the condensate trap must be installed
outside the appliance using an extended hose set with
regard to the upfl ow versions of the Udara.
The condensate hoses in the fan compartment must
also be safeguarded from frost, for example, by
installing thermal insulation and/or a heating ribbon
around the hoses.
If the temperature of the suctioned air drops below
freezing point, the condensate in the heat exchanger
itself can freeze. In such a case, a bypass must be
made using the air outlet duct to the suction duct so
that the suctioned air is preheated. 2
2.5 Versions
The Multicalor Udara appliances are available in 2
versions: upfl ow and downfl ow.
2.5.1 Upfl ow
Suctioning takes place at the bottom of the appliance
with regard to an upfl ow version. The blowing out of
the hot air takes place at the top of the appliance. This
is also sometimes called a top blowing version.
The fi lter is at the bottom of the air heater as standard.
If you want to connect the appliance on its side, you
must order an optional fi lter frame.
If side connection is required, we recommend ordering
a long tool life fi lter from the accessory range and not
to opt for the standard side fi lter frame with regard to
the Udara 40 and 50.
2.5.2 Downfl ow
Suctioning takes place at the top of the appliance with
regard to a downfl ow appliance. The blowing out of the
hot air takes place at the bottom of the appliance. This
is also sometimes called a bottom blowing version.
DF is added to the appliance type with regard to the
downfl ow version.
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