Multicalor Udara 10 User manual

Udara
INSTRUCTIONS FOR THE INSTALLER AND END USER
INSTALLATION, COMMISSIONING, MAINTENANCE AND USE OF THE APPLIANCE
Gas-fired condensing and modulating air heater with an
automatically regulated energy-efficient fan with a direct current
motor and gas-adaptive burner control
Brand: Multicalor Udara
Model: 10, 15, 20, 30, 40 et 50 (DF)
Land of destination: United Kingdom (UK)
Read this document before starting the installation or using the
appliance.After commissioning, give instructions to the user and
keep this document in the immediate vicinity of the appliance.
This appliance may not be operated by children, people with
a diminished mental capacity, physical impairments or lack of
knowledge unless under supervision or after receiving training
on how to use the appliance safely and as long as they are
aware of the possible risks. Children may not play with the
appliance under any circumstances. Cleaning and maintenance
performed by the user may never be carried out by children
without supervision.
Multicalor Industries NV
Blarenberglaan 21 • B–2800 Malines
Tel.: [phone] • Fax: [phone]
[e-mail] • www.multicalor.be
IHL_UDARA_2016_11_04_BEGB Wijzigingen voorbehouden

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IHL_UDARA_2016_11_04_BEGB
Table of contents
1 Safety 5
1.1 Warnings and symbols 5
1.2 Improper use 5
1.3 General safety instructions 5
2 General information 8
2.1 Description 8
2.2 Gas category 8
2.3 Standard version 8
2.4 Outdoor air version 8
2.5 Versions 8
3 Technical data 9
3.1 In general 9
3.2 Technical data 9
3.3 Overview of components 10
3.4 Dimensions 11
4 Installation 12
4.1 In general 12
4.2 Installation of the flue gas outlet system 12
4.3 Installation of the condensate drain condffffffffffffff 17
4.4 Installation of the gas pipe 17
4.5 Installation of the ductwork 18
5 Commissioning 20
5.1 Switching the appliance on and off 20
5.2 Regulating the combustion 20
5.3 Converting the appliance to propane 21
6 Operating and setting 22
6.1 In general 22
6.2 Modulating thermostat RC21 22
6.3 Air-conditioning 23
6.4 Heat pump 23
6.5 Operation in heating mode 23
6.6 Setting as ventilation 23
6.7 The control panel 23
6.8 Changing settings 24
6.9 Error codes 26
7 Maintenance 27
7.1 Maintenance by the user 27
7.2 Maintenance by the installer 27
8 Troubleshooting 28
8.1 Appliance does not start after 5 attempts 28
8.2 Internal error 29
8.3 Overheating and NTC errors 29
8.4 Display does not work 29
8.5 Flue gas fan operates continuously or not at all 29
8.6 System fan operates continuously or not at all 29
8.7 No communication with thermostat 29
8.8 Fuse or earth leakage circuit breaker intervenes 30
8.9 Loss of flame shortly after ignition 30
8.10 Service Request 30
8.11 Normal settings 30

IHL_UDARA_2016_11_04_BEGB 3
9 Diagram 31
10 Parts 32
10.1 Parts list 32
10.2 Ordering procedure 32
10.3 Service request 32
11 Guarantee 33
11.1 In general 33
11.2 Scope and duration of the guarantee 33
11.3 Damage that is not covered by the guarantee 33
11.4 The following are not covered by the guarantee 33
11.5 Repairs 33
11.6 Service sets 33
12 Multicalor RC21.14 34
12.1 Setting the language, date and time 34
12.2 Mode
12.3 Summer ventilation 36
12.4 Program 36
12.5 Switching off periods (max. of 2 periods) 37
13 EC Declaration of conformity 38
14 Declaration of conformity KB 2004-01-08 39

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IHL_UDARA_2016_11_04_BEGB

IHL_UDARA_2016_11_04_BEGB 5
This section must be carefully studied by the installer
and the user.
1.1 Warnings and symbols
A number of symbols point out possible dangers that
may occur when installing or using the appliance.
Depending on the seriousness of the potential
situation, other symbols, icons or words are used.
Always take these warnings seriously and never ignore
them.
1.2 Improper use
The Udara air heater is intended for heating systems
based on hot air where both the heated and the intake
air is distributed through a system of ducts.
If the appliance is used inexpertly or improperly, a
situation may be created that entails danger for the
user or third parties or can lead to damage to the
appliance or the environment.
You may only install the Udara if you combine the
appliance with the accessories listed in the manual for
the combustion air supply (CAS) and flue gas outlet
(FGO).
As an installer or user you have the obligation to
closely follow the instructions contained in the manual
of the appliance or the possible accessories. You
must, moreover, respect all inspection and
maintenance conditions
You must connect the appliance electrically in
accordance with the protection degree specified on
the nameplate and in accordance with the locally
applicable regulations.
If you implement changes to the appliance that are
not described in the manual, you must ask for written
permission from the manufacturer.
Transgressions to these instructions will be deemed
not according to the regulations and may lead to
dangerous situations or material damage regarding
which the manufacturer rejects any responsibility.
1.3 General safety instructions
The installation, mounting, disassembly,
commissioning, maintenance and repair must only be
performed by professionals. They must have all legal
qualifications and, by preference, they must have
followed training at the manufacturer of the appliance.
As a user, you must closely follow the maintenance
instructions. Ask your installer to go through this
section if you have any questions.
1.3.1 Danger of fatal injury because of gas leaks
With regard to gas smells in buildings:
• extinguish all naked flames (such as from
smoking, cookers, etc.).
• Do not operate any doorbells, switches, plugs,
telephones, entry panels or other devices
• Close the main gas valve and the gas valve on the
product.
• Open windows and doors.
• Evacuate the building and stop third parties from
entering the building.
• Warn the fire brigade using a telephone
connection outside the building (for example, at
the neighbours).
• If the leak occurs in front of the gas meter, warn
the energy company.
Liquid gas is heavier than air and will collect near the
floor. If the appliance is being installed below ground
level, leaking liquid gas will collect and, therefore,
there will be an explosion risk.
• Ensure that liquid gas can never escape from the
appliance or the gas pipe.
1.3.2 Danger of fatal injury because of flammable
substances
Do not use or keep explosive or flammable substances
(petrol, thinner, paper, etc.) near the appliance.
1.3.3 Danger of fatal injury because of
combustion gases escaping
If flue gases escape, this can lead to dangerous
situations.
• Only use the appliance with a fully installed
CAS/FGO
1 Safety
Danger!
This symbol warns you about a serious danger.
Intervene immediately to prevent heavy physical or
fatal injury or significant material damage.
Danger!
This symbol warns about a danger or fatal injury
because of an electric shock. Ignoring this warning
can lead to significant physical or fatal injury.
Warning!
This symbol warns about a dangerous situation.
Ignoring this warning can lead to physical injury,
material damage or environmental damage.
Attention!
This symbol warns about a situation that deserves
your attention. Ignoring this warning can lead to
material damage. .
Information(s)
This symbol indicates that somewhere else in the
manual you can find more information about this
topic or it will refer you to a local standard.

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IHL_UDARA_2016_11_04_BEGB
• Always use the appliance with an installed front
cover.
A dangerous situation may occur if the appliance is
supplied with insufficient combustion air.
• Ensure there is a permanent and unobstructed
air supply to the set-up room of the appliance in
accordance with the applicable standards.
If you smell flue gases or you suspect there is a
combustion gas leak, you must intervene immediately.
• Open windows and doors and ventilate the
building.
• Switch off the product.
• Consult your installer and have the combustion
circuit checked for leaks or obstructions.
If the condensate trap is empty, flue gas may leak.
• Always use the appliance with a fully filled
condensate trap.
1.3.4 Danger of fatal injury because of electric
shocks
If you touch components that carry a current, there is
a danger of fatal injury because of an electric shock.
Before you work on the product:
• Ensure that the current to the appliance has been
disconnected.
• Protect against reconnection.
• Always wait a few minutes so that the capacitors in
motor controls, etc., are discharged.
1.3.5 Danger of fatal injury because of changes
Unauthorised changes to the product or set-up room
can lead to dangerous situations.
• Never remove, bypass or change the temperature
probes in the appliance.
• Sealed parts in the appliance must not be opened.
• Never change the piping for gas or the CAS/FGO
and the wiring for the voltage.
• The condensate discharge must always be
present and changes must never be implemented
regarding the condensate discharge.
1.3.6 Danger of fire or becoming trapped
If you want to connect the appliance without ductwork,
you must:
• Install a vent on the suction opening that impedes
access to the fan compartment;
• Install a vent or blow plenum on the blow hole so
that there is no direct access to the heat
exchanger compartment. This vent or plenum
must also ensure that flammable material cannot
fall on the heat exchanger.
These accessories are available from our range. If you
do not know which accessories you need, you can
contact your dealer for additional information.
• Also make absolutely sure that the environment in
which the appliance is being installed cannot lead
to any dangers because of floating dust and/or
flammable or corrosive substances or fumes.
Some parts of the appliance can become very hot
during and shortly after use.
• Only carry out activities such as maintenance after
the appliance has completely cooled down.
1.3.7 Risk of corrosion damage
Chemical products such as solvents, paints,
adhesives, soaps, etc., may lead to corrosion in the air
heater or in the CAS/FGO.
• Ensure that the combustion air is always dust-free
and is not polluted by fluorine, chlorine, sulphur
and other contaminants.
• If the combustion air is being supplied through a
chimney duct, it must not have been used in the
past as an FGO for fuel oil devices, coal or wood
burners or open fireplaces.
• If the appliance is set up in launderettes, ironing
parlours, swimming pool rooms, etc., the
appliance must be installed in a separate
set-up room in which the ambient air is free from
chemical contaminants.
• Combustion air that is insufficiently dust-free
can lead to an unreliable ignition and, in extreme
cases, even damage to the heat exchanger
because of internal dirt. If this risk exists, you must
order an intake filter for the CAS that is available
as an accessory.
1.3.8 Material damage because of unsuitable
tools
In addition to conventional tools, you also need a
number of specific tools to work on or maintain the
Udara appliance.
• You need a special square drill bit, size 2, to
loosen the tapping screws.
• In addition, you need a set of Allen wrenches with
a rounded side.
• Using a 0-10 Nm torque wrench is recommended.
• You must have a flue gas analysing device that
can measure the following substances in the flue
gases: NOx (nitrogen oxides), O2 (residual
oxygen) and CO (carbon monoxide). If your
appliance cannot measure NOx, it is strictly
prohibited to change the adjustment of the
appliance or to perform a manual calibration.
1.3.9 Material damage because of frost
If the appliance is not set up frost-free, the appliance
can be damaged. If the temperature of the suctioned
air drops far below freezing point, frost can even occur
in the heat exchanger itself.
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.

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1.3.10 Material damage to the flexible gas tube
The flexible gas tube can be damaged because of a
heavy load due to a weight or repeated and
unnecessary bending.
• Do not suspend the burner and mixing box from
the flexible corrugated gas tube during
maintenance
1.3.11 Material damage after water ingress
If the appliance or parts of it are exposed to water
ingress, the appliance must be put out of service
immediately. All safety components that are exposed
to water must, subsequently, be replaced

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2 General information
2.1 Description
Multicalor Udara air heaters are gas-fired 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 fired 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
sufficient to connect the flue 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 specified
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 upflow 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: upflow and downflow.
2.5.1 Upflow
Suctioning takes place at the bottom of the appliance
with regard to an upflow 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 filter 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 filter frame.
If side connection is required, we recommend ordering
a long tool life filter from the accessory range and not
to opt for the standard side filter frame with regard to
the Udara 40 and 50.
2.5.2 Downflow
Suctioning takes place at the top of the appliance with
regard to a downflow 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
downflow version.

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3 Technical data
3.1 In general
The Udara air heaters are CE approved by Technigas based in Brussels and comply with the Gas Appliance
Directive 2009/142/EC. The CE label added to every appliance is the guarantee that the appliances are
continuously checked by TECHNIGAS. The appliances also meet the Machinery Directive 2006/42/EC, the
EMC Directive 2004/108/EC, the Low Voltage Directive 2006/95/EC and the Hazardous Substances Directive
2011/65/EU.
3.2 Technical data
3.2.1 Gas category I2N and I3P technical data
Udara HR (DF) 10 15 20 30 40 50
Gas category I2H, I2L, I2N, I2E, I3P
Gas appliance types B22p, C12, C32, C52, C92
Maximum load on the lower value [PCI] G20 - 20 mbar kW 10.0 14.8 19.7 29.5 39.4 49.2
Minimum load on the lower value [PCI] G20 - 20 mbar kW 1.8 2.6 3.4 5.1 6.8 8.6
Maximum power G20 - 20 mbar kW 10.6 15.7 21.0 31.4 42.1 52.5
Minimum power G20 - 20 mbar kW 2.0 2.8 3.7 5.6 7.4 9.4
Gas consumption at full load G20 - 20 mbar m³/h 1.058 1.566 2.085 3.122 4.169 5.206
Gas consumption at partial load G20 - 20 mbar m³/h 0.190 0.275 0.360 0.540 0.720 0.910
Gas consumption at full load G25 - 25 mbar m³/h 1.253 1.854 2.468 3.695 4.935 6.163
Gas consumption at partial load G25 - 25 mbar m³/h 0.216 0.313 0.409 0.614 0.818 1.035
Thermal efficiency at full load % 106.2 106.3 106.4 106.6 106.8 106.8
Thermal efficiency at partial load % 109.0 109.0 109.0 109.0 109.0 109.0
NOx emissions < 30 mg / kWh (CLASS 5 EN1020 / EN1319)
Gas category I3P
Maximum load on the lower value [PCI] G31 - 37 mbar kW 10.2 15.1 20.1 30.1 40.2 50.2
Minimum load on the lower value [PCI] G31 - 37 mbar kW 1.7 2.4 3.2 4.8 6.3 8.0
Maximum power G31 - 37 mbar kW 10.5 15.6 20.7 31.1 41.6 52.0
Minimum power G31 - 37 mbar kW 1.8 2.6 3.4 5.0 6.7 8.5
Gas consumption at full load G31 - 37 mbar kW 0.417 0.617 0.822 1.231 1.644 2.053
Gas consumption at partial load G31 - 37 mbar kW 0.069 0.099 0.13 0.195 0.260 0.328
Inlet pressure G20 G25
G31 mbar 20
25
37
Nominal air flow rate m³/h 650 1200 1500 2100 3000 3500
Nominal temperatureincrease °C 51 41 44 47 44 47
Maximum discharge air temperatur °C 80
Working temperature in heating mode °C minimale 0° / maximale 35°
Nominal takenup power kW 0.17 0.20 0.26 0.30 0.55 0.60
Diameter restriction mm 3.6 4.0 4.0 4.4 6.0 6.4
Mixing box # 45 45 30 30 10 0
Venturi # 4 4 5 8 6 6
Gas connection Ø 1/2” G
FGO diameter mm 80
CAS diameter mm 80
Protection degree IP 20
Condensate discharge diameter mm 32
Condensate quantity kg/h 1.3 2.0 2.6 3.9 5.2 6.5
Power supply voltage V 230 V - 50 Hz (N + L+ PE)
Width mm 400 400 400 500 600 700
Depth mm 720
Height mm 1100 1200
Weight kg 52 66 71 84 99 122
Fuse (outside appliance) A 6T 8T 8T 16T 16T 16T
CE approval number # E1432/5671

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3.3 Overview of components
14
6
1
2 3
4
15
5
8
4
7
12
11
10
9
16
1
2 3
9
10
12
14
16
11
4
5
6
7
8
13
15
Legend
Number Meaning
1 Combustion air supply
2 Flue gas outlet
3 Control panel
4 Probe discharge air temperature (NTC 2 / NTC 5)
5 Flue gas outlet coupling
6 Mixing box and venturi
7 Ionisation electrode
8 Ignition electrode
9 Flexible gas tube
10 Burner management control system
11 Flue gas fan
12 Gas valve
13 Intake temperature probe (NTC 1)
14 Condensate discharge trap
15 System fan
16 Air filter (in downflow in filter cabinet)

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3.4 Dimensions
3.4.1 Dimensions Upflow
Legend
Udara 10 15 20 30 40 50
A 400 500 600 700
* + 70
a Gas throughput
b Power supply cable connection
c Thermostat connection
d Condensate drain throughput
11
0
0
3
00
*
37
0
*
4
1
0*
5
35
*
*
A
-
6
0
A
1
2
0
75
A
-
6
0
66
0
7
2
0
72
5
A
30
4
7
0
67
5
x
41
0
3.4.1 Dimensions Downflow
11
0
0
1
2
0
75
A
-
6
0
40
0
7
2
0
72
5
A
47
0
x
41
0
B
B-40
400
515
Legend
Udara 10 15 20 30 40 50
A 400 500 600 700
B 340 440 540 540
* + 70
a Gas throughput
b Power supply cable connection
c Thermostat connection
d Condensate drain throughput

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4.1 Algemeen
Gevaar!
Alvorens over te gaan tot installatie of inbedrijfname
van het toestel:
• Verzeker u er van dat de condities van het lo-
kale distributienet (gas en elektriciteit) overeen-
stemmen met de afstelling van het apparaat.
• Controleer of het land van bestemming
vermeld op verpakking en kentekenplaat
overeenstemt met het land waar u het toestel
installeert.
(BE = België).
• Controleer of de gekozen manier van VLT/RGA
vermeld staat op het kentekenplaatje.
Contacteer ons indien dit niet het geval is en stop
ogenblikkelijk de installatie of inbedrijfname.
Waarschuwing!
De luchtverwarmer mag uitsluiten geïnstalleerd
worden door een bevoegd installateur die over alle
wettelijk vereiste certificaten beschikt.
Lokale normen
De installatie moet worden uitgevoerd conform met
de laatste uitgave van alle lokale normen en met de
installatiehandleiding van het toestel.
Raadpleeg zeker de NBN B 61-001, NBN B 61-002,
NBN D 51-003, NBN D51-004, NBN D 51-006,
NBN D 30-003
4.1.1 Transportschade
Gelieve bij levering de luchtverwarmer op transport-
schade na te kijken. Indien schade wordt vastgesteld,
vermeldt u dit op de vrachtbrief en waarschuwt u
schriftelijk uw leverancier.
4.1.2 Verpakking
De luchtverwarmers zijn verpakt in een doos uit gere-
cycleerd karton. Werp de verpakking niet weg maar
biedt ze aan voor verdere recyclage.
4.1.3 Minimale vrije ruimte rondom het toestel
Let op volgende minimale vrije ruimten bij de opstelling
van het toestel:
• Rondom het toestel 50 mm vrijhouden.
• Rondom de rookgasafvoer en eventueel brand-
baar materiaal minimum 25 mm vrijhouden; bij
concentrische rookgasafvoer dient geen vrije
ruimte te worden gerespecteerd.
• Aan de voorzijde van het toestel dient ongeveer
1000 mm service ruimte voorzien te zijn (let op
een comfortabele stahoogte).
• Aan de kant van de condensafvoer dient minimaal
een vrije ruimte aanwezig te zijn van 200 mm.
•
4 Installation
• Position the appliance centrally in comparison to
the ductwork.
• Position the appliance on a level and robust
substrate.
• The appliance must be raised on a wet floor.
• Always set up the appliance isolated from the
structural structure to prevent the transmission of
noise and vibrations.
Danger!
• When using an open return, no appliances with
an open combustion chamber may be present
in the same set-up room. Strictly respect local
standards with regard to the ventilation of the
set-up room.
Attention!
The appliance must be level!
The appliance must be set up frost-free.
4.1.5 Moving the appliance on site
The air heaters must never be moved using the cor-
ners by tilting the appliance. The housing of the appli-
ance can be irrevocably damaged due to this. This
damage is not covered by the appliance’s guarantee.
4.2 Installation of the flue gas outlet
system
4.2.1 Luchttoevoer– en rookgasafvoerleidingen
Danger!
• Protect the flue gas outlet with a non-flamma-
ble sheath if it is being guided through walls or
cavities made of flammable material. Always
respect the free space of 25 mm between this
sheath and the discharge pipe.
• Every Udara appliance must be equipped with
an individual FGO/CAS. Shared discharge
systems are not permitted.
• The burner compartment of the Udara is part of
the combustion circuit. The appliance must not
be put into operation with a missing front cover.
Information(s)
In some countries, the use of CAS or FGO pipes
that have not been enclosed in metal or other fire-
retardant material is prohibited.Always consult the
local standards before installing.
Udara air heaters are appliances that, by preference,
are set up as a closed appliance (type C). This means
that the appliance must be connected through a paral-
lel or concentric flue gas outlet (FGO) and combustion
air supply (CAS).
Combustion gases are discharged through one pipe
and air required for the combustion is supplied through
the other pipe.
4.1 In general
Danger!
Before installing or commissioning the appliance:
• Make sure that the conditions of the local
distribution mains (gas and power) match the
adjustment of the appliance.
• Check whether the country of destination is
specified on the packaging and the nameplate
matches the country where you are installing
the appliance (BE = Belgium).
• Check whether the selected CAS/FGO method
is specified on the nameplate.
Contact us if this is not the case and immediately
stop the installation or commissioning.
Warning!
The air heater must only be installed by a com-
petent installer who has all the legally required
certificates.
Local standards
The installation must be performed in accordance
with the latest publication of all local standards and
the installation manual of the appliance.
Ensure you consult the NBN B 61-001,
NBN B 61-002, NBN D 51-003, NBN D 51-004,
NBN D 51-006, NBN D 30-003.
4.1.1 Damage during transport
Check the air heater for damage during transport upon
delivery. If damage is established, specify this on the
consignment note and warn your supplier in writing.
4.1.2 Packaging
The air heaters are packaged in a box made of
recycled cardboard. Do not throw away the packaging,
but again offer it for recycling.
4.1.3 Minimum free space around the appliance
Ensure that the following minimum free space is
available when setting up the appliance:
• keep 50 mm free around the appliance;
• keep at least 25 mm free space around the flue
gas outlet and possible flammable material; free
space is not required with regard to a concentric
flue gas outlet;
• approximately 1000 mm of service space must be
available at the front side of the appliance (ensure
that there is a comfortable standing height);
• at least 200 mm of free space must be available
on the side of the condensate discharge.
4.1.4 Set-up room
Pay attention to the following guidelines when
determining the place to set up the air heater:
• Position the appliance as closely as possible to
the flue gas outlet and the combustion air ducts.

IHL_UDARA_2016_11_04_BEGB 13
You can also set up the appliance as an open one
(type B). If the appliance is set up as B22p, a special
air filter must be installed on the suction inlet of the
Udara air heater. This filter will stop the igniter ducts
between the premix burners from becoming
obstructed and will prevent individual objects from
falling into the appliance.
Always position measuring points in the FGO and
CAS so that a representative sample of the flue gases
and the combustion air can be taken. The measuring
points must, by preference, be positioned as close as
possible to the appliance.
The used CAS and FGO pipes must be gas-tight and
must meet the applicable standards. Multicalor has
PP and stainless steel pipes in its range that meet all
applicable standards. If the discharge of the
combustion gases and supply of combustion air takes
place through the roof, the especially designed and
approved icicle-low roof gland MUGRO SKYLINE
must be used.
Les conduites utilisées pour l’évacuation des gaz de
fumée et l’alimentation en air de combustion doivent
être étanches aux gaz et respecter les normes en
vigueur. Dans sa gamme, Multicalor possède des
conduites en PP et en inox qui respectent toutes les
normes en vigueur.
Connecting to another roof gland is not permitted in
relation to the approval in accordance with the Gas
Appliance Directive. If the discharge of
combustion gases and the supply of combustion air
takes place through the wall, the especially
designed and approved wall gland MUGRO WALL
must be used. Connecting to another wall gland is not
permitted in relation to the approval in accordance with
the Gas Appliance Directive.
The flue gas outlet must be installed with a minimum
slope of 5 cm/m towards the appliance so that the
condensate can flow towards the appliance.
4.2.1 Type B22p connection
The combustion air is taken from the room with regard
to a type B22p connection. The discharge takes place
through a gas-tight fixed or flexible pipe.
L
3
2
1
Legend
Number Meaning
1 Measuring point
2 Combustion air supply opening
3 Intake filter (dusty rooms) or protective vent
There must always be a direct and non-closable air
supply outlet towards the outside with an area of 3
cm²/kW as the total set up power with a minimum of
150 cm². If local standards prescribe stricter require-
ments, you must, of course, comply with these.
Position a protective vent or, when setting up the
appliance in dusty rooms, an intake filter on the CAS
so that no individual objects can fall into the appliance
and the burner is safeguarded from contaminants.
Always position a measuring point in the FGO. The
maximum allowable length for the discharge pipe is
specified in table 4.2.7.
Danger!
Never connect an Udara appliance straight on to a
standard chimney!Agas-tight FGO must always be
used.

14
IHL_UDARA_2016_11_04_BEGB
4.2.2 C52 two-pipe system
As an alternative to open flue gas outlet system B22p,
you can also use closed system C52.
The drawing below shows a two-pipe C52 system.
The length of the flue gas outlet (L1+L2+L3) plus the
equivalent length of the bends must not exceed the
maximum value specified in item 4.2.7.
Always install a measuring point in the CAS and FGO.
L1
L2
L3
1
Legend
Number Meaning
1 Measuring point
4.2.3 Parallel systems (C12/C32)
You can use a parallel system to discharge the flue
gases. Multicalor carries a range of supply and
discharge pipes made of high-quality PP and stainless
steel.
The drawing below shows a parallel system.
The length of the flue gas outlet plus the equivalent
length of the bends must not exceed the maximum
value specified in item 4.2.7.
Always install a measuring point in the CAS and FGO.
L
L1
L2
1
Legend
Number Meaning
1 Measuring point

IHL_UDARA_2016_11_04_BEGB 15
4.2.4 Concentric systems (C12/C32)
The flue gas outlet (FGO) pipe is surrounded by the
combustion air supply (CAS) pipe with regard to a
concentric flue gas outlet system. Multicalor carries a
full range of concentric pipes.
The Y-pipe supplied with the flue gas outlet terminal
must be positioned on top of the appliance with regard
to a concentric connection.
Always position a measuring point in the concentric
piping, by preference, immediately after the Y-pipe or,
if this is not possible, as close as possible to the
appliance.
L
L1
L2
1
Legend
Number Meaning
1 Measuring point
The length of the flue gas outlet plus the equivalent
length of the bends must not exceed the maximum
value specified in item 4.2.7.
4.2.5 Chimney renovation (C92)
It is sometimes interesting to install a special flexible
flue gas outlet pipe with a diameter of 80 mm in an
existing flue gas outlet (conventional) fireplace. The
combustion air can then be supplied through the air
cavity between the flue gas outlet pipe and the existing
chimney or in the room itself. The connection between
the flexible pipe in the old flue gas duct and the
appliance can then take place in parallel or
concentrically.
L1L3
L2
1
Legend
Number Meaning
1 Measuring point
The length of the flue gas outlet plus the equivalent
length of the bends must not exceed the maximum
value specified in item 4.2.7.
Warning!
Do not use the old flues as combustion air supply if
they have been used in the past as the FGO for fuel
oil appliances, coal or wood burners or fireplaces.
If you want to use this system, the existing fireplace
must at least measure 150 mm x 150 mm when using
a discharge pipe with a diameter of 80 mm.

16
IHL_UDARA_2016_11_04_BEGB
4.2.6 Maximum length of the flue gas outlet
Warning!
The maximum allowed length of the flue gas outlet
must not be exceeded.
Depending on the used flue gas outlet and appliance
types, the maximum length of the flue gas outlet and
combustion air supply vary.
The maximum length is the sum of the following: the
length of the straight pipes (L, L1 + L2, or L1+L2+L3 in
the figures)/ the equivalent length of the other
elements such as bends or intake filters that you can
find in the table below.
4.2.7 Allowed materials
Attention!
Never use flue gas outlet or combustion air supply
piping made of PVC. Do not use aluminium for the
flue gas outlet either.
You can use PP pipes as flue gas outlet pipes if local
standards allow this. If not, use gas-tight pipes made
of stainless steel of the 40, 50, 60 or 70 type in accor-
dance with the EN 1856-1 standard.
You can use PP pipes as combustion air supply pipes
if local standards allow this. If not, use gas-tight pipes
made of stainless steel of the 40, 50, 60 or 70 type in
accordance with the EN 1856-1 standard.
Table 2: Maximum allowed length of the flue gas outlet
Type Ø Remarks Maximum allowed length
Udara HR (DF) 10 15 20 30 40 50
B22P
C52 80 mm Smooth pipes in PP/RVS Flexible pipes MG Flexline in the flue gas outlet 30 30 30 30 30 20
C12
C32 80/125 mm Concentric systems with wall terminal Concentric systems with roof terminal 12.5 12.5 12.5 12.5 12.5 10
C12
C32 80 + 80 mm Parallell systems with wall terminal Parallell systems with roof terminal 20 20 20 20 20 15
C92 80/125
mm Concentric pipes dans la chaufferie Flexible pipes MG Flexline in the flue gas outlet 12.5 12.5 12.5 12.5 12.5 10
Bend 90° Bend 90° 2.00
Bend 45° Bend 45° 1.00
Bend 30° Bend 30° 0.75
Intake filter 4.00
Protective vent 1.00
4.2.8 Position of the terminal
All applicable standards must be respected with regard
to wind attack and pollution. If local standards are not
available, use the following guidelines:
• Every terminal must be located in a square of 0.6
m without obstacles.
• The distance between a roof terminal and a
vertical wall must at least be 0.5 m.
• The distance between a roof terminal and a wall
that makes an angle with it and in which windows
can be found must at least be 2.5 m.
• The distance between 2 roof or wall terminals
must at least be 0.6 m.
• The terminals of 2 end pieces that are one on top
of the other in a wall must at least be 2.5 m
• Terminals may not be installed under a porch roof.
• The terminal must at least be at a distance of 1.0
m from the plot border.
• The wall terminal must at least be 1.0 m above
ground level and the roof terminal must at least be
0.4 m above the roof (in connection with snow).
• The wall terminal must at least be at a distance of
0.5 m from the corner of the building.

IHL_UDARA_2016_11_04_BEGB 17
4.4 Installation of the gas pipe
Danger!
• The installation of the gas pipe must only be
carried out by a certified installer or energy
company.
• Check whether the gas category and inlet
pressure match the data on the appliance’s
nameplate.
• Only use fittings and pipes that have been
specifically approved for gas systems.
• Always consult local standards before installing
the gas pipe.
• Always position an approved stop cock in front
of the appliance. NEVER use a flame to check
the piping or to trace a leak.
Attention!
• Ensure there is no dirt in the gas pipe. Purge
the piping before installation using nitrogen to
clean them.
• By preference, install an additional gas filter to
prevent contamination of the gas control block.
• Pay attention when using leak sprays near
electrical components.
• Close the stop cock and disconnect the gas
valve when pressure testing the gas pipe. The
maximum pressure when pressure testing is
125 mbar.
The area of the gas pipe must be in accordance with
all applicable local standards and regulations. If the
area is too small, the appliance will not be able to
achieve its maximum power and starting problems can
occur.
Connect the gas supply piping using a ½” connection
directly on to a 90° bend that has been equipped with
a gas control block ex-factory.
Position an approved shut-off valve immediately in
front of the appliance. The feed for the gas connection
is provided on the right as standard.
If required, the gas connection can also be on the left.
Blind grommets in the openings ensure there is an
airtight seal of the burner compartment.
4.3 Installation of the condensate drain
condffffffffffffff
Warnings!
• NEVER shut off the condensate discharge.
• NEVER remove the trap and do not make
any unauthorised changes to the condensate
discharge.
• Do not discharge the condensate directly
outside (frost risk), but discharge the water
using the indoor drainage system.
• If local standards require condensate neutra-
lisation, you must install such a device before
discharging the condensate down the drain.
• The condensate drain MUST be installed with
a slope (5 cm/m) towards the drainage system.
• The trap must be installed outside the fan com-
partment and hoses must be safeguarded from
frost with regard to an outdoor air appliance.
• The trap must be installed outside the fan com-
partment and hoses must be safeguarded from
frost with regard to an outdoor air appliance
d’égout normal en PVC ou PE convient bien.
• The trap must be installed outside the fan com-
partment and hoses must be safeguarded from
frost with regard to an outdoor air appliance
• After installation or maintenance, clean both
traps and fill with clean water.
Voor een juiste werking van het toestel dient de
condensafloop op de riolering aangesloten te worden.
Standaard is de aansluiting rechts voorzien. Indien
gewenst kan de condensafloop ook links gebeuren. U
dient dan de blinde tule, die het gat in de linkerzijde
afsluit, naar de rechterzijde te verplaatsen.
Indien u de sifon naar de linkerzijde verplaatst, dient
u mogelijk de afvoerslangen in te korten. Dit kan met
een scherp mes gebeuren. Sluit de condensafloop
steeds aan volgens de bijgevoegde tekening.
2
3
4
5
1
Legend
Number Meaning
1 Appliance
2 Funnel
3 Extra trap
4 Gradient on slope (5 cm/m)
5 Indoor drainage
To ensure the appliance operates correctly, the
condensate drain must be connected to the drainage
system. The connection is provided on the right as
standard. If required, the condensate drain can also be
placed on the left. You must then move the blind
grommet that seals the hole on the left side to the right
side. If you move the trap to the left side, you may
have to shorten the discharge hoses. You can do this
with a sharp knife. Always connect the condensate
drain in accordance with the enclosed drawing.

18
IHL_UDARA_2016_11_04_BEGB
4.5 Elektrische installatieDanger!
• Ensure that the installation is free from voltage
(dead) before you start the installation.
• Always connect the earthing.
• Respect all applicable standards (for example,
AREI (General Regulations on electrical instal-
lations)).
• Always position an external isolator switch at
the appliance that will allow you to isolate the
appliance from the mains.
• The minimum creepage distance between
contacts must be 3 mm.
The electrical installation must always be carried out
in accordance with the last publication of the relevant
standards and the regulations of the local energy
company.
4.4.1 Connecting the power supply
A 3-pole terminal has been installed in the fan
compartment where a supplied plug can be installed
for the mains power supply. A hole has been included
in the housing to lead through the cable.
Use the supplied blind grommet or cable coupling to
lead through the cable.
Connect the cable to the 230 V~AC power supply with
earthing.
We recommend connecting the appliance directly to
the distribution box that has a delay fuse (the value to
be used is specified in the technical data table).
Attention!
We recommend using circuit breakers with a D
switching-off curve because of the high input surge
currents of the direct current motors.
You can also connect the cable using a plug to the
wall socket outlet with a socket with safety earthing if
required.
The Udara must always be supplied with power. If you
temporarily put the appliance out of service, the
appliance can be set to the standby mode using the
RC21.
4.4.2 Connecting the modulating thermostat
The Udara is used, by preference, with the RC21
thermostat for simple residential applications.
A 2-pole terminal has been installed in the fan
compartment on which a supplied plug for the
thermostat can be installed.
A hole has also been included in the housing to lead
through the cable. Connect the thermostat through a
shielded and twisted 2-core signal cable with a wire
cross-section of 2 x 0.8 mm².
plaats waar deze niet wordt beïnvloed door andere
warmtebronnen zoals uitblaasroosters, elektrische
apparaten, direct zonlicht, enz.
Ook de plaatsing bij vensters, deuren, dicht (<1.20 m)
bij een buitenmuur of onder of dichtbij een trap is niet
aan te bevelen.
Voor meer inlichtingen inzake montage en program-
mering verwijzen wij naar de handleiding van de
thermostaat.
Waarschuwing!
Sluit nooit een spanningsvoerende kamerthermo-
staat aan. De branderautomaat wordt daardoor
onherstelbaar beschadigd.
4.6 Installatie kanalensysteem
4.6.1 Algemene opmerkingen
Gevaar!
Indien u het toestel wenst aan te sluiten zonder een
kanalensysteem moet u:
• een rooster op de aanzuigopening plaatsen
die de toegang tot het ventilatorcompartiment
belet.
• een rooster of uitblaasplenum monteren op de
uitblaasopening zodat er geen rechtstreekse
toegang is tot het warmtewisselaarcomparti-
ment. Dit rooster of plenum moet ook verhinde-
ren dat er brandbaar materiaal op de warmte-
wisselaar kan vallen.
Waarschuwing!
Alvorens u de Udara upflow gebruikt met terugname
onderaan, moet u de bodemplaat verwijderen langs-
heen de uitsparingen.
In de Udara toestellen is er standaard een luchtfilter
voorzien. Verwijder nooit het luchtfilter uit een Udara
toestel. Het apparaat dient steeds voorzien te zijn van
een luchtfilter klasse EU3 of beter.
4.6.2 Installatie aanvoerkanalen
Voor de Udara toestellen is een gamma van witgelakte
akoestisch geïsoleerde luchtverdeelkasten (plenums)
beschikbaar waar de toevoerkanalen op kunnen wor-
den aangesloten. Deze worden bij een bovenuitbla-
zende versie op, bij een onderuitblazende versie onder
het toestel geplaatst.
In punt 4.6.4 vindt meer informatie aangaande de
aanbevolen minimale afmetingen van de te gebruiken
luchtverdeelkasten.
Install the room thermostat at an approximate height of
1.6 m centrally in the living room and easily accessible
for the normal air circulation in the room. Always install
the thermostat on an inside wall at a place where it
will not be influenced by other sources of heat such as
vents, electrical appliances, direct sunlight, etc.
We do not recommend installing next to windows,
doors, close (< 1.20 m) to outside walls or under or
close to a staircase either. For more information about
installing and programming refer to the thermostat’s
manual.
Warning!
Never connect a voltage-carrying room thermo-
stat. The burner management control system will
become irreparably damaged because of this.
4.5 Installation of the ductwork
4.5.1 General remarks
Danger!
If you want to connect the appliance without duct-
work, you must:
• install a vent on the suction inlet that stops the
access to the fan compartment;
• install a vent or blow plenum on the blow hole
so that there is no direct access to the heat
exchanger compartment. This vent or plenum
must also ensure that flammable material can-
not fall on the heat exchanger.
Warning!
Before you use the Udara upflow with readmission
at the bottom, you must remove the bottom plate
along the recesses.
Udara appliances have an air filter as standard. Never
remove the air filter from an Udara appliance. The
appliance must always be equipped with an air filter
class EU3 or better.
4.5.2 Installation of the supply ducts
A range of white acoustic insulated air distribution
boxes (plenums) are available for Udara appliances
to which the supply ducts can be connected. The box
is installed on top with regard to the upflow version
and on the bottom of the appliance with regard to the
downflow version.
More information is given in item 4.6.4 regarding the
recommended minimum dimensions of the air
distribution boxes to be used.

IHL_UDARA_2016_11_04_BEGB 19
4.5.3 Installation of the readmission ducts
Attention!
Always install the readmission ducts in such a way
that noise locks cannot occur between different
rooms.
A range of white acoustic insulated air distribution
boxes (plenums) are available for Udara appliances to
which the readmission ducts can be connected. The
box is installed at the bottom with regard to the upflow
version and on top of the appliance with regard to the
downflow version. The readmission ducts can also be
connected directly on to the side of the air heater if
required. Please order the optional filter cartridge for a
side connection to do this.
The standard side filter frame for the Udara 40 and 50
is very small and we recommend using a long tool life
filter from the range of accessories.
If you want to use an open return (only possible if there
are no appliances with an open combustion circuit in
the set-up room), you can order a perforated readmis-
sion plenum.
f you are connecting an outdoor air duct, a control
valve must always be included in the outdoor air duct.
4.5.4 Air distribution box dimensions
Danger!
• Internal acoustic or thermal insulation in the air
distribution box must be able to resist long-
term increased temperatures and must be
mechanically protected against being
detached.
• The insulation must be erosion-proof so that no
dust particles end up in the airflow.
Use the figures below as a guideline when determining
the ideal size of the air distribution boxes and/or air
ducts. Please contact us for advice if you have any
doubts or questions.
A
1
30° max
A
A
½ A
1
30° max
Legend
Number Meaning
1 Acoustic and thermal insulation
A Width of the appliance

20
IHL_UDARA_2016_11_04_BEGB
5.1 Switching the appliance on and off
Normally, the appliance must always be supplied with
power through the mains power supply. You can follow
the following steps to switch the appliance on and off
during installation or maintenance.
5.1.1 Switching on
Follow the following steps to switch on the appliance:
• Switch on the mains power supply.
• Open the gas valve.
• Set the room thermostat to the required value.
• After a short waiting time, the appliance will ignite.
If the lock-out symbol is displayed on the appliance
screen or an error message is displayed on the RC21
thermostat, you must unlock the appliance by pressing
the reset button. You can also unlock the appliance
through the RC21.
You must thoroughly vent the gas pipe before
starting the appliance with regard to a new installation.
A poorly vented gas pipe can mean that the appliance
will be in the error mode.
If the appliance does not ignite after repeated attempts
and unlocking instances, consult the section about
faults and failures or contact the manufacturer or
installer.
5.1.2 Switching off
Follow the following steps to switch the appliance off:
• Set the room thermostat 5°C lower than the room
temperature.
• Wait until the burner has switched off (the flame
symbol will no longer be displayed on the screen).
• Close the gas valve.
• Wait until the appliance has fully cooled down
(discharge air temperature < 30°C).
• Switch off the mains power supply.
5.2 Regulating the combustion
The combustion of the Udara has been set ex-factory
and does not have to be changed normally.
If, however, the burner management control system or
the gas control block have been replaced, for example,
after a fault, the calibration procedure must again be
performed.
The simplest way in which to do this is through manual
calibration using an RC21 thermostat. Having a device
with which you can also measure the NOx (nitrogen
oxide) content in the flue gases is recommended to
ensure the procedure is performed correctly.
Enter the installer password to start the procedure;
see the “Technical menu” page of the RC21. This
password is issued when you follow training at
Multicalor.
Next, select the “Calibration, manual complete” option.
The appliance will attempt to start a few times until
there is flame detection. When there is flame
detection, the correct quantity of gas will be calculated
5 Commissioning
to achieve the best possible start behaviour. This value
is stored in the burner management control system
and cannot be changed by the installer. Next, the
heater will start to burn at maximum power
The following will be displayed on the screen:
Boiler calibration
Phase of procedure:
Combustion set:
Power level:
Boiler temp:
Error:
max...
50
100%
75°C
none
Cancel Confirm
Attention!
Ensure that sufficient vents have been opened so
that the appliance can get rid of its power. If you do
not do so, the overheat control will be activated and
the calibration will be interrupted.
If the flame signal is stable, “Max ok” will be displayed
on the screen. Next, you can change the CO2 in the
combustion gases by changing the “Combustion set”
value. If you increase the value, you decrease the
CO2. If you decrease the value, you increase the CO2.
Boiler calibration
Phase of procedure:
Combustion set:
Power level:
Boiler temp:
Error:
max ok
50
100%
75°C
none
Cancel Confirm
If you, next, confirm the setting by pressing “Confirm”,
the controller will continue to the next step.
Next, a combustion test will be performed at approxi-
mately 60% of the maximum power.