Page 1
1801UDSBD-4E,--EN
GAS FIRED BALANCED FLUE / FAN ASSISTED FLUE
UNIT HEATER WITH CENTRIFUGAL FAN
UDSBD-4E
INSTALLATION - COMMISSIONING - SERVICING
These appliances meet the following EC Direcves
DIR 2009/142/EC:GAD
DIR 2014/30/EU:EMC
DIR 2014/35/EU: LVD
DIR 2006/42/EC:MD
Applies to
Belarus, Bulgaria, China, Czech Republic, Croatia, Cyprus, Denmark, Estonia, Finland, Greece, Hungary,
Iceland, Latvia, Lithuania, Montenegro, New Zealand, Norway, Poland, Portugal, Romania, Russian
Federation, Sebria, Slovakia, Slovenia, Spain, Sweden, Turkey, Ukraine
Please read this document carefully before commencing installaon, commissioning and/or servicing.
Leave it with the user or aached to the appliance or gas service meter aer installaon.
WARNING
Improper installaon, adjustment, alteraon, service or maintenance can cause property damage, injury or death. All work
must be carried out by appropriately qualied persons.
The manufacturer does not take any responsibility in the event of non-observance of the regulaons concerning the
connecon of the apparatus causing a dangerous operaon possibly resulng in damage to the apparatus and/or environment
in which the unit is installed.
Subject to modicaons
1801UDSBD-4E,GBEN, Pag. 1/35
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INDEX
1
2
3
4
Warnings 2
1. General 2
2. Installation codes 2
3. Warranty 2
4. Uncrating and preparation 2
5. Dimensions 3
6. Technical data 6
7. Flueing requirements 10
8. Unit heater location 13
9. Hanging the unit 14
10. Gas piping and pressures 14
11. Electrical supply and connections 15
12. Check installation and start up 17
13. Maintenance schedule 20
14. Heat exchanger maintenance 21
15. Burner maintenance 22
16. Burner orice 23
17. Ignition system 23
18. Blower motor 24
19. Centrifugal fan 24
20. Gas valve 25
21. Combustion air pressure switch 26
22. Flue and combustion air system 26
23.Limit controls 26
24. Troubleshooting 27
25. Parts list 33
GENERAL
Models UDSBD-4E are design certied to the CE EN1020
standard for use in industrial and commercial installations
only. All models and sizes are available for use with either
natural or propane gas. The type of gas, the input rate and
the electrical supply requirement is shown on the heater rating plate. Check the rating plate to determine if the heater is
appropriate for the intended installation.
This installation manual is shipped with the heater. Verify that
the literature is correct for the heater being installed. If the
manual is incorrect for the heater, contact the supplier before
beginning installation.
The instructions in this manual apply only to the models listed.
Installation should be done by a suitably qualied installer in
accordance with these instructions. The installer is responsible for the safe installation of the heater.
These units must be installed in accordance with BS6230 or
BS5440 as appropriate plus all local building codes.
INSTALLATION CODES
WARNINGS
Improper installation, adjustment, alteration, service, or
maintenance can cause property damage, injury, or death.
Read the installation, operation, and maintenance instructions thoroughly before installing or servicing this equipment.
Gas-red appliances are not designed for use in hazourdous
atmospheres containing ammable vapors or combustible
dust, in atmospheres containing chlorinated or halogenated
hydrocarbons or in applications with airborne silicone substances.
Should overheating occur, or the gas supply fail to shut off,
shut off the manual gas valve to the appliance before shutting
off the electrical supply.
Do not use this appliance if any part has been immersed
in water. Immediately call a qualied service technician to
inspect the appliance and replace any gas control that hes
been immersed in water.
This appliance is not intended for use by persons (including
children) with reduced sensory or mental capabilities or lack
of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance
by a person responsible for their safety. Children should be
supervised to ensure that they do not play with the appliance.
FOR YOUR SAFETY
What to do if you smell gas
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier.
• Evacuate all personnel.
• Do not store or use petrol or other ammable
vapours and liquids in the vicinity of this or any
other appliance.
Warranty is void if :
a. Wiring is not in accordance with the diagram furnished
b. The unit is installed without proper clearances as soon
c. A fan model is connected to a duct system or if the air
WARRANTY
with the heater.
as clearances are required regardless of the material being combustible.
delivery system is modied.
UNCRATING/PREPARATION
This unit was test operated and inspected at the factory prior
to crating and was in proper operating condition. If the heater
has incurred damage in shipment, document the damage with
the transport company and contact your supplier.
Check the rating plate for the gas and electrical specications
of the heater to be sure that they are compatible with the gas
and electric supplies at the installation site.
Read this booklet and become familiar with the installation
requirements of your heater. If you do not have knowledge of
local requirements, check with the gas supplier and any other
local agencies who might have requirements concerning this
installation.
Before beginning, make preparations for necessary supplies,
tools, and manpower. If the installation includes optional
vertical louvers or downturn nozzle etc., install these options before the heater is suspended. Follow the instructions included in the option package.
1801UDSBD-4E,--EN, Pag. 2/35
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J
G
K
H
R
1
2
4
3
P
M N
D
A C
U V
E
A1
Y
Z
X
5
5
DIMENSIONS/CLEARANCES (horizontal orientation=standard)
Figure 1a : UDSBD015-4E → UDSBD020-4E
Top view
Front view
Rear view
Side view
1. Combustion air inlet
2. Flue connection
3. External gas connection
4. Electrical connections
5. Service panel
Table 1a : Dimensions (mm)
UDSBD-4E A A1 B C D E F G H J K L M N P Q R
015 383 460 700 343 404 935 546 199,5 191 139 122 86 413 15,5 98 350 120
020 383 460 700 343 404 935 546 199,5 191 139 122 86 413 15,5 98 350 120
1801UDSBD-4E,--EN, Pag. 3/35
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Figure 1b : UDSBD025-4E, 030-4E, 035-4E, 043-4E, 050-4E, 055-4E & 064-4E
J
G
K
H
R
1
2
4 3
B
A
C
CF
E
A1
L
J
K
H
G
R
5
1 2
34
P
M N
B
A C
U V
E
A1
X
Y
z
5
Top view
Front view
Rear view mod. 025-4E & 030-4E
Rear view mod. 035-4E, 043-4E & 050-4E
1 2
G
J
R
Side view
1. Combustion air inlet
2. Flue connection
3. External gas connection
4. Electrical connections
5. Service panel
Table 1b : Dimensions (mm)
UDSBD-4E A A1 B C D E F G H J K L M N P Q R
025→030
035→050
055 663 685 970 609 601 1610 897 354 206 150 165 204 623 33 148,5 600 225
064 663 720 970 609 601 1610 897 354 206 150 165 204 623 33 148,5 600 225
586 590 700 546 404 1185 546 367,5 191 222 122 121 413 15,5 98 350 140
510 670 970 456 601 1610 897 371 194 126 165 121 623 33 148,5 600 140
K
H
34
Rear view mod. 055-4E & 064-4E
1801UDSBD-4E,--EN, Pag. 4/35
Page 5
Clearances (mm)
6
Units must be installed so that the minimum clearances
in the following table are provided for combustion air
space, inspection and service and for proper spacing from
combustible materials.
Table 2 : Clearances (mm)
UDSBD-4E X Y Z (*) U V
015 → 030
100 130 50 270 850
Attention :
The clearance distance from the ue system must be
minimum 150mm at all points !
(*) : Heaters can be base mounted on
suitable non combustible supports.
035 → 064
100 180 100 350 850
Combustion air supply and ue system diameters
Diameter gas connection
Table 3 :
UDSBD-4E 015 020 025 030 035 043 050 055 064
Dia ue/air inlet (mm) 80 80 100 100 100 100 100 130 130
Dia gas connection 1/2” 1/2” 1/2” 1/2” 3/4” 3/4” 3/4” 3/4” 3/4”
TECHNICAL DATA
Each blower motor is a three speed motor. The blower can be used on 3 different speeds. The units leaving the factory are
set to the standard speed as mentioned in table 4b. The curves as shown in the gures below, illlustrate for each unit which
speeds can be chosen in order to get another air duty. Speeds not illustrated in the curves mean that these are not applicable
(means : unit should not be set to that speed).
To use the blower on a different speed, the electrical connection of the blower motor needs to be changed. This has to be done
in the electrical connection box mounted on the blower itself. Inside the box, the 230V power supply wire is connected to the
terminal of the standard speed. For changing speeds, you have to reconnect this wire to the terminal that corresponds to the
desired speed (see wiring diagram inside service panel unit).
Table 4a : Gas category
Country Gas category Country Gas Category
Belarus II2H3+ Montenegro II2H3+
Bulgaria I2H or I3B/P New Zealand II2H3+
China II2H3+ Norway II2H3 B/P
Czech Republic II2H3+ Poland II2H3P
Croatia II2H3P Portugal II2H3+
Cyprus II2H3+ Romania II2H3P
Denmark II2H3 B/P Russian Federation I2H or I3P
Estonia II2H3+ Serbia II2H3+
Finland II2H3 B/P Slovakia II2H3+
Greece II2H3+ Slovenia II2H3+
Hungary II2HS3P Spain II2H3+
Iceland II2H3+ Sweden II2H3 B/P
Latvia II2H3+ Turkey II2H3+
Lithuania II2H3+ Ukraine I2H or I3P
1801UDSBD-4E,--EN, Pag. 5/35
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Table 4b : Technical data
UDSBD-4E 015 020 025 030 035 043 050 055 064
Gas category see table 4a
Comb. Air & Flue, type B instal.
Comb. Air & Flue, type C instal.
1
1
C12, C32, C42, C52, C62, C82
B22
Flue & combustion air connection collars mm 80 80 100 100 100 100 100 130 130
Heat input (Hs) kW 17,6 22 30,8 35,2 42,2 50,8 58,6 66 77,7
Heat input (Hi) kW 15,9 19,8 27,8 31,7 38 45,8 52,8 59,5 70
Heat output kW 14,6 18,2 25,5 29,2 34,9 42,1 48,6 54,7 64,4
Thermal efciency % 92 92 92 92 92 92 92 92 92
Gas consumption rate
Nat. gas G20 m3/h 1,68 2,1 2,94 3,36 4,02 4,85 5,59 6,3 7,41
Prop. G31 kg/h 1,24 1,55 2,16 2,47 2,96 3,57 4,12 4,64 5,46
Gas connection size (not supply line size)
Temperature rise
3
Airow
3
2
1/2” 3/4”
K 20 23 27 25 25 31 29 30 32
m3/h 2150 2350 2750 3360 4080 3900 4900 5300 5930
Nominal motor speed rpm 950 950 1430 1430 950 950 950 950 950
Standard low, mid or high speed mid high low mid low low mid mid high
Recommanded mounting height
Horizontal air throw
Sound pressure
Sound pressure
5
6
7
4
m 3,5 4 4,5 4,5 5,5 5,5 6 6 6
m 18 23 26 26 32 34 38 38 38
dB(A) 50 52 47 51 46 47 52 50 53
dB(A) 57 58 54 58 53 54 59 57 60
Electrical service (protection class IP20) 230/240V 1N ~ 50 Hz
Total electrical rating W 496 496 1662 1662 1700 1700 1700 1700 1700
1) Gas Appliance Classications for Approved Venting Methods based on CEN-report CR1749:2001.
2) There is a difference between the gas connection diameter and the diameter of the supply line. Always use the most adequate diameter of the supply
line to minimize the pressure drop through the gas pipes - if necessary, reduce the diameter of the supply line at the inlet of the unit.
3) Figure for discharge louvre zero deection.
4) Height from oor to bottom surface of heater. These are recommendations only. Positioning of unit heaters for proper performance is application
dependent. Operation is affected by other air moving equipment in the space, obstructions to the airow, draughts and/or close proximity to doors
or windows, etc ... Care should be taken to avoid mounting the heaters above these recommendations, unless downturn nozzle options are used,
as signicant stratication may occur resulting in poor oor coverage and higher energy losses through the roof structure.
5) Isothermal conditions +/-20°C ambient air temperature, discharge louvres zero deection, v = 0,5m/s. The air throw will be inuenced by the height
of the building, mounting height of the unit, ambient temperature & adjustment of the louvres.
6) Sound pressure level in dB(A) in free eld conditions, measured at 5 meters from the unit, free outlet
7) Sound pressure level in dB(A), measured at 5 meters from the unit with A=160m² & Q=2, free outlet
1801UDSBD-4E,--EN, Pag. 6/35
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Figure 2a : Blower curve for UDSBD015-4E→UDSBD/020-4E
Figure 2b : Blower curve for UDSBD025-4E→030-4E
1801UDSBD-4E,--EN, Pag. 7/35
Page 8
Figure 2c : Blower curves for UDSBD035-4E
Figure 2d : Blower curves for UDSBD043-4E
1801UDSBD-4E,--EN, Pag. 8/35
Page 9
Figure 2e : Blower curves for UDSBD050-4E
Figure 2f : Blower curves for UDSBD055-4E
1801UDSBD-4E,--EN, Pag. 9/35
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Figure 2g : Blower curves for UDSBD064-4E
7
FLUE REQUIREMENTS
Model UDSBD-4E heaters may be installed as Type-B and
Type-C installations.
Local requirements may apply in addition to national
requirements. These unit heaters are designed to operate
safely and efciently with either a horizontal or vertical ue
system when installed with the specic requirements and
instructions.
If this heater is replacing an existing heater, be sure that
the ue is sized properly for the heater being installed and
that the existing ue is in good condition. A properly sized
ue system is required for safe operation of the heater. An
improperly sized ue system can cause unsafe conditions
and/or create condensation.
The air heaters may be installed as a balanced ue (type
C) heater requiring both a combustion air inlet duct and
a ue pipe or as a power vented heater (type B) (the
combustion air is taken from the space where heater is
installed), which requires only a ue pipe exhausting to
outdoors.
Each heater installed as a type B appliance must be tted with
an individual ue pipe and the combustion air inlet opening
is provided with a protection grill. Each heater installed as a
type C appliance must be tted with an individual combustion air/ue pipe system. Type C2 appliance, with single duct
system for supply of combustion air and evacuation of ue
gasses, are not allowed.
IMPORTANT :
The ue must be installed in accordance with national
and local regulations. Failure to provide proper ueing
could result in death, serious injury and/or property
damage. The air heater must be installed with a ue to
the outside of the building. Safe operation of any power
vented gas apparatus requires a properly operating ue
system, correct provision for combustion air and regular
maintenance and inspection.
Diameter & maximum ue pipe lengths
Flue pipe diameters and maximum pipe lengths in table 5 apply to both horizontal and vertical systems. Add all straight
sections and equivalent lengths for elbow.
The total combined length must not exceed the maximum
ue length.
1801UDSBD-4E,--EN, Pag. 10/35
Page 11
Table 5 : maximum ue system pipe lengths
015-020 025050 055064
mm Flue pipe/Inlet pipe 80 100 130
m
Flue pipe/Inlet pipe 9 9 9
m Flue pipe/Inlet pipe 0, 75 0,75 0,75
m Flue pipe/Inlet pipe 1,5 1,5 1,5
m Flue pipe/Inlet pipe 2,5
2,5 n.a
Equivalent Length of
90°elbow
UDSBD-4E
Heater socket & pipe dia
Max straight length
Equivalent length of 45°
elbow
Equivalent length of 90°
elbow
• Use only one ue pipe diameter on an installation.
• Recommended minimum ue is 1m.
* Mentioned lenghts only apply when :
- no elbow installed immediately after ue and inlet
- successively installation of several elbows without straight pipe
FLUE OUTLET
Venter outlet attachment requirements:
Depending on the size of ue pipe as determined in table 5,
attach either the ue pipe directly to the collar or a taper-type
connector.
Attention :
Single wall ue pipe exposed to cold air or run through unheated
areas should be insulated. Where condensation is unavoidable,
provision must be made for the condensation to ow freely to
a point to which it can be released, i.e. a drain or gully. The
condensation drain from the ue must be constructed from non-
corrodible material not less than 20 mm diameter. Copper or
copper based alloys must not be used for condensation drains.
The port must be at least 450 mm away from the air heater ue
connection socket. Follow the ue pipe manufacturers instal-
lation instructions for making joints, including connections to
the air heater, for passing through a building element and for
support requirements.
Single wall ue seamless aluminium or stainless steel pipes
are required. All joints must be sealed to prevent products
of combustion from leaking into the building. If the ue
passes through a combustible element of the building it
must be enclosed by a sleeve of non-combustible material
and separated from the sleeve by a minimum of 25 mm air
break. The temperature of any combustible material near
to the ue must not exceed 65°C when the heater is in
operation. The ue must be at least 150 mm away from any
combustible material.
FLUES FOR POWER VENTED INSTALLATIONS
(type B appliances)
If the air heater is to be installed as a type B appliance, air
for combustion will be taken from within the space where the
heater is installed. Ensure that an adequate air supply for
combustion and ventilation is provided within the building in
accordance with BS6230/BS5440 plus other relevant regulations & rules in force.
Figure 3 : Approved appliances type B
B22 - roof B22 - wall
1801UDSBD-4E,--EN, Pag. 11/35
Page 12
Figure 4 : Type B appliances :
UDSBD 015 & 020
2
1
1
2
UDSBD 025 030 055 064
UDSBD 035 043 050
1
2
Combustion air and ue pipe sockets
Models 015-4E & 020-4E
Combustion air inlet pipe & ue pipe for balanced ue
installation (type C appliances)
Balanced ue air heaters are designed to be tted with a
combustion air inlet duct that obtains outdoor air and a ue
pipe that exhausts ue products to outdoors. Both the ue
and combustion air pipes must be sealed. Use gasket sealed
seamless aluminium or stainless steel pipe or equivalent.
For testing, the ue pipe should include a sealable test port.
Type C2 appliances must not be applied !
Figure 5 : Approved appliances type C
Models 025-4E, 030-4E, 055-4E & 064-4E
Models 035-2, 043-2 & 050-2
1) Flue pipe outlet collar
2) Combustion air inlet opening
C12
C12b/C62
C32 / C62
AIR SUPPLY
When these air heaters are installed in type B applications, designed to take air for combustion from the space
in which it is installed. Do not restrict the combustion
air intake.
It is important to ensure that there is an adequate air supply
at all times for both combustion and heating requirements.
Modern buildings involve greater use of insulation, improved
vapour barriers, and weather proong. These practices mean
that buildings are sealed much tighter than in the past.
Proper combustion air supply for a power vented Type B
installation requires ventilation of the heated space. Natural
inltration of air may not be adequate. Use of exhaust fans
aggravates this situation. It is important to ensure that there
is adequate combustion air supply at all times. Reliance on
doors and windows is not allowed.
Always ensure that adequate combustion air is provided
to suit the total installation of all combustion equipment
in accordance with BS6230 or BS5440 as appropriate.
Ensure that the air combustion inlet opening at the rear side
of the unit cannot be obstructed (cfr. g. 3).
C52
1801UDSBD-4E,--EN, Pag. 12/35
Page 13
Figure 6 : Type C appliances : Combustion air and ue pipe sockets
UDSBD 015 & 020
1
2
UDSBD 025 030 055 064
2
1
UDSBD 035 043 050
8
015-4E & 020-4E
025-4E, 030-4E, 055-4E & 064-4E
1) Flue pipe outlet collar
2) Combustion air pipe inlet collar
LOCATION HEATER
Warning:
If touched, the vent pipe and internal heater surfaces
that are accessible from outside the heater will cause
burns. Suspend the heater such that these components
cannot be touched.
Remark:
Flue requirements may affect location. Consult section
7 before making a nal determination.
Use the minimum clearances in section 5 and the throw data
in the technical data table of section 6 when determining
where to suspend the heater.
For best results, the heater should be placed with certain rules in
mind. Always ensure that minimum clearances are maintained.
Locating a unit heater above the maximum recommended
height can result in signicant air stratication. When possible,
heaters should be arranged to blow toward or along exposed
wall surfaces.
Suspended heaters are most effective when located as close to
the working zone as possible, but care should be exercised to
avoid directing the discharged air directly on to room occupants.
Partitions, columns, counters, or other obstructions should be
taken into consideration when locating the unit heater so that a
minimum quantity of airow will be deected by such obstacles.
When units are located in the centre of the space to be heated,
the air should be discharged toward the exposed walls. In large
areas, units should be located to discharge air along exposed
walls with extra units provided to discharge air in toward the
centre of the area. For optimum results heaters are best used in
conjunction with recirculating air fans suspended at high level.
035-4E, 043-4E & 050-4E
1
2
Hazards of Chlorine - apply to the location of the
combustion air inlet
The presence of chlorine vapours in the combustion air
of gas-red heating equipment presents a potential corrosion hazard. Chlorine, found usually in the form of freon or
degreaser compounds when exposed to a ame will precipi-
tate from the compound, and go into solution with any condensation that is present in the heat exchanger or associated
parts. The result is hydrochloric acid which readily attacks all
metals. Care should be taken to separate these vapours from
the combustion process. This may be done by wise location
of the unit ue and combustion air terminals with regard to
exhausters or prevailing wind directions. Chlorine is heavier
than air. Keep this fact in mind when determining installation
location of the heater in relation to building exhaust systems.
Where chlorine vapours are prevalent heaters with special
grade 316 A1SI stainless steel heat exchangers are recommended.
At those points where inltration of cold air is excessive, such
as at entrance doors and shipping doors, it is desirable to locate
the unit so that it will discharge directly toward the source of
cold air, typically from a distance of 4.5 to 6.0 meters or install
a downow unit over the door opening.
Caution : Do not locate the heater where it may be exposed to water.
1801UDSBD-4E,--EN, Pag. 13/35
Page 14
9
HANGING THE HEATER
10
Warning:
Check the supporting structure to verify that it has sufcient
load-carrying capacity to support the unit weight. Suspend
the heater only from the threaded nut retainers or with a
manufacturer provided kit. DO NOT suspend from the heater cabinet panels.
Do not place or add additional weight to the suspended
heater.
Before suspending the heater, check the supporting structure to
verify that it has sufcient load-carrying capacity to support the
weight of the unit.
Table 6 : Weights
UDSBD-4E 015 020 025 030 035
kg 50 53 71 74 125
UDSBD-4E 043 050 055 064
kg 131 131 148 153
Leave the unit on the pallet. If the bottom of the unit is not
supported or protected damage can occur.
The heater is supplied with four point suspension. All points
must be used. Two threaded nut retainers are provided on each
side of the top of the heater. See gure 6 for hanger rod size.
Figure 7 : Suspending the heater with rods from the
threaded nut retainers
Add a nut to lock the
M10x1.5 hanger rod to the
heater
Detail
Be sure that the threaded hanger rods are locked to the heater
as illustrated in gure 6. Recommended maximum hanger
rod length is 1.8m. Where longer drops are required, ensure
that restraints are tted to prevent excess lateral movement
and supports are adequately sized.
GAS PIPING & PRESSURES
All piping must be in accordance with requirements outlined in
the National Gas Codes (different for each country). Gas supply piping installation should also conform with good practice
and any local codes. Support gas piping with pipe hangers,
metal strapping, or other suitable material. Do not rely on
the heater to support the gas pipe.
All sealing products shall be resistant to the action of liqueed
petroleum gas or any other chemical constituents of the gas
being supplied.
Install a ground joint union and manual shutoff the gas cock
upstream of the unit control system.
The unit is equipped with a nipple that extends outside the
cabinet. The gas connection is 1/2” or 3/4”, dependent on the
size of the unit.
Leak test all connections by brushing on a leak detecting
solution.
Table 7 : Diameter gas connection
UDSBD-4E
Nat gas/
Propane
Warnings:
All components of a gas supply system must be leak tested
prior to placing equipment in service. NEVER TEST FOR
LEAKS WITH AN OPEN FLAME. Failure to comply could
result in personal injury, property damage or death.
This appliance is equipped for a maximum gas supply
pressure of 50 mbar.
Pressure testing supply piping
Test pressures above 50mbar : Disconnect the heater
and manual valve from the gas supply line which is to be
tested. Cap or plug the supply line.
Test pressures below 50mbar : Before testing, close the
manual valve on the heater.
Figure 8 : gas connection
Model 015 through 030
Model 035 through 064
1/2”
3/4”
1801UDSBD-4E,--EN, Pag. 14/35
Page 15
11
12
The electrical installation may only be carried out by an
appropriately qualied person current to IEE Regulations. The
supply line to the heater should include a main switch. The
minimum clearance distance between the contacts must be
more than 3 mm.
All electrical connections should be made in the heater control
compartment. Screw type terminals are provided. Connections
should be in accordance with the terminal markings and the
wiring diagram afxed to the air heater.
Attention :
Serious damage can occur to burner relay when faulty
connection of thermostat, reset switch or burner failure
lamp.
Switching of wires for reset switch and ame failure (e.g.
in a remote control box) will destroy the burner relay.
The minimum external control required for the air heater is
a room thermostat. It is essential that the main input line
and neutral to terminals L and N remain live at all times
even when the heater is switched off to ensure correct
operation of the unit.
A polarisation switch with green indicator light is tted inside
the heater to check if Line, Neutral and Earth are connected
correctly. If this is the case, the green light will glow when
pushing on the switch. If the light does not glow, check
earth, line and neutral connections.
A burner reset switch with red indicator light is tted on the
heater. To add a remote reset button, make connections to the
terminals in the electric box as indicated on the wiring diagram.
ELECTRICAL CONNECTION
DANGER : THIS APPLIANCE MUST BE
EARTHED.
MPORTANT:
If the reset button requires activating for any reason,
the cause must be determined. After determining
and correcting the problem, restart the heater and
monitor long enough to ensure proper operation
(approx. 5 minutes).
An orange indicator light is tted on the heater to signify
when the burner is on.
Ensure that all cables and installers wiring are xed to
the gas pipe and that they do not touch the combustion
collector box.
THERMOSTAT LOCATION
Do not attempt to control more than 1 air heater from
a single thermostat or control panel unless a properly
wired relay is tted. Follow the instructions supplied
with such panels.
The location of the room thermostat or sensor is very
important. It should not be positioned on a cold wall or
cold surface. Avoid location in draughty areas or where it
may be inuenced by heat sources e.g. the sun, process
plant, etc. The thermostat should be mounted on a
vibration free surface and mounted about 1,5 metres
above oor level. Follow the thermostat manufacturers
instructions. The thermostat must be suitable for potential
free contacts.
START-UP
Check the installation prior to start-up
Check suspension. Unit must be secure.Verify that no other
parts are tted which are not individually supported and
secured.
Check clearances from combustibles. Requirements are in
section 5.
Check vent system to be sure that it is installed according
to the instructions in section 7, venting requirements.
Check piping for leaks and proper gas line pressure. Bleed
gas lines of trapped air.
Check electrical wiring and ensure that wiring conforms
with the wiring diagram. Be sure all wire sizes meet
requirements.
Check polarity. Verify that line voltage exists between the
black “L1” and earth ground.
Verify that the appliance is earthed by conducting an earth
continuity test.
Heater start-up
Warning:
For your safety, follow the instructions exactly otherwise damage or injury could occur.
• This heater does not have a pilot ame. It is equipped with
an ignition device which automatically lights the burner.
Do not try to light the burner by hand.
• Before operating, smell all around the heater area for gas.
Be sure to smell next to the oor because propane gas
is heavier than air and will settle near the oor.
• Do not use this appliance if any part has subjected
to water ingress. Immediately call a qualied service
technician to inspect the appliance and to replace any
part of the control system and any gas control.
• When overheating occurs or when gas supply is not
turned off, shut the manual gas tap before turning off the
electric power.
1801UDSBD-4E,--EN, Pag. 15/35
Page 16
Operating instructions and operating sequence
1. Set thermostat to the lowest setting.
2. Turn off all electric power to the heater.
3. Shut the gas cock at the inlet of the unit.
4. Wait ve (5) minutes to clear out any gas. Then smell
for gas, including near the oor. If you smell gas, STOP!
and follow the steps in the WARNINGS printed on page
3. If you do not smell gas, proceed to the next step.
5. Turn on the electric power to the heater.
6. Open the gas cock at the inlet of the unit.
7. If tted, ensure that a time switch is set to an ‘ON’ period.
8. Adjust the thermostat to the required setting (must be
above current room temperature).
If the appliance does not operate, follow the instructions
“To turn off gas supply at the Appliance” printed below and
call your service technician.
9. Thermostat calls for heat, energyzing the venter motor.
10. When adequate air ow for combustion is proven by an
air proving switch and a prepurge period has elapsed,
the integral ignitor and multifunctional gas control operate. The ignition spark ignites the gas creating the
burner ame.
11. Burner ame is sensed by a ame rod sensor and when
the heat exchanger is warmed up (+/- 30 seconds) and
the fan control relay closes, the fan motor is energized.
12. If the ame is extinguished during the main burner op-
eration, the integrated control system closes the main
valve and attempts to relight the burner. The unit will
attempt 5 ignitions before entering a “lock out” mode.
Lock out is indicated by the red warning light on the
heater. To end this mode push on the reset switch.
13. To turn the heater ‘OFF’ for short periods : adjust the
room thermostat to its lowest setting or ‘OFF’. The fan
will continue to run to cool the heater and then switch
off automatically.
14. To turn the heater ‘OFF’ for long periods : see ‘To turn
off gas supply at the appliance’ below.
Burner gas pressure adjustment
The gas pressure is set for the required heat input before the
appliance leaves the factory. Provided that the gas supply
to the air heater is in accordance with the supply pressure
described on the appliance data plate, the operating pressure
will not require adjustment. To check the pressure use the
following procedure:
* Ascertain from the heater’s data plate the correct operating
gas pressure;
* Turn the room thermostat control to its lowest setting;
* Remove the screw from the burner pressure test point of
the multi-functional control valve. Connect a manometer
to the test point( see gures 9 & 10);
* Adjust the room thermostat to call for heat i.e. above room
ambient temperature;
* Observe the burner gas pressure on the manometer and
compare to the required pressure on the data plate;
* If necessary, adjust the burner gas pressure. Remove
the cover screw (models 035-4E- >100-4E) or cover cap
(models 011-4E->030-4E). To adjust low re, use the lower
copper ring - to adjust high re, use the upper plastic ring;
* Set room thermostat to lowest setting to turn OFF the burn-
ers. Replace the test point screw/cap and with the main
burner OFF, test for gas soundness using a leak detector
uid.
Reset temperature control/room thermostat to comfort
operating level.
Check installation after start-up
TO TURN OFF GAS SUPPLY AT THE APPLIANCE
1) Set thermostat to the lowest possible setting or ‘OFF’
position.
2) Shut off the gas tap when the fan has stopped.
3) Switch off electric power to the appliance.
Check gas pressure as described in detail below.
Turn the unit off and on, pausing 2 minutes between
each cycle. Observe for smooth ignition.
Set the thermostat to the required room temperature.
Place this booklet and any control or optional informa-
tion in an accessible
location near the heater or give this information to the
end user.
1801UDSBD-4E,--EN, Pag. 16/35
Page 17
Figure 9 : Gas valve types 015-4E -> 043-4E Figure 10 : Gas valve types 050-4E -> 064-4E
2b
2a
1
2a/2b
3
4
6
6
1
5
8
5
7
3
7
48
1) Shut-off solenoid valve EV1
2a) Adjustment low re
2b) Adjustment high re
3) Inlet pressure test point (not visible on g. 10)
4) Outlet pressure test point (not visible on g. 10)
5) Shut-off solenoid valve EV2
6) Pilot outlet
7) Main gas outlet
8) Holes (M5) for xing anges
Table 8 : Burner jets and pressures
*Belarus, China, Croatia, Czech Republic, Cyprus, Estonia, Greece, Iceland, Latvia, Lithuania, Montenegro, New Zealand, Portugal,Serbia, Slovenia,
Slovakia,
015-2 020-2 025-2 030-2 035-2 043-2 050-2 055-2 064-2
Nat.Gas
(G20)
Prop.
(G31)
Burner jet
Burner
pressure
Burner jet
Burner
pressure
*Romania, Poland
Nat.Gas
(G20)
Prop.
(G31)
Burner jet
Burner
pressure
Burner jet
Burner
pressure
dia 3,70 4,20 4,80 5,30 5,75 6,50 6,80 7,10 8,00
mbar 7,80 7,10 8,20 7,50 7,90 7,10 7,90 8,40 7,90
dia 1,19 2,15 2,60 2,80 3,10 3,35 3,70 3,90 4,15
mbar 36,90 36,90 36,80 36,80 36,00 35,90 35,80 35,70 35,60
015-2 020-2 025-2 030-2 035-2 043-2 050-2 055-2 064-2
dia 3,70 4,20 4,80 5,30 5,75 6,50 6,80 7,10 8,00
mbar 7,80 7,10 8,20 7,50 7,90 7,10 7,90 8,40 7,90
dia 2,10 2,25 2,80 2,95 3,30 3,50 3,80 4,10 4,40
mbar 29,90 29,90 29,80 29,80 28,90 29,30 28,80 28,40 28,50
inlet pressure
20 mbar
inlet pressure
37 mbar
inlet pressure
20 mbar
inlet pressure
30 mbar
*Hungary, Russian Federation, Ukraine
015-2 020-2 025-2 030-2 035-2 043-2 050-2 055-2 064-2
Nat.Gas
(G20)
Prop.
(G31)
Burner jet
Burner
pressure
Burner jet
Burner
pressure
dia 3,70 4,20 4,80 5,30 5,75 6,50 6,80 7,10 8,00
mbar 7,80 7,10 8,20 7,50 7,90 7,10 7,90 8,40 7,90
dia 1,19 2,15 2,60 2,80 3,10 3,35 3,70 3,90 4,15
mbar 36,90 36,90 36,80 36,80 36,00 35,90 35,80 35,70 35,60
*Bulgaria, Denmark, Finland, Norway, Sweden
015-2 020-2 025-2 030-2 035-2 043-2 050-2 055-2 064-2
Nat.Gas
(G20)
Prop.
(G31)
Burner jet
Burner
pressure
Burner jet
Burner
pressure
dia 3,70 4,20 4,80 5,30 5,75 6,50 6,80 7,10 8,00
mbar 7,80 7,10 8,20 7,50 7,90 7,10 7,90 8,40 7,90
dia 1,19 2,15 2,60 2,80 3,10 3,35 3,70 3,90 4,15
mbar 28,90 28,90 28,80 28,80 29,20 29,20 29,00 28,90 28,90
inlet pressure
25 mbar
inlet pressure
50 mbar
inlet pressure
20 mbar
inlet pressure
30 mbar
1801UDSBD-4E,--EN, Pag. 17/35
Page 18
IGNITION SYSTEM
This heater is equipped with a direct spark integrated control relay. The control relay monitors the safety devices and
controls the operation of the venter motor and the gas valve between heat cycles. The time line below illustrates a normal heat cycle.
Normal heat cycle operating sequence
Denitions
Start position: The system is not in lock-out position and can proceed with the start-up sequence upon a demand for heat.
Pre-purge time: This is a period of 20 seconds during which the combustion fan (venter) operates prior to activation of the ignition device.
Safety time: The safety time is the delay between the gas valve being energised and the ame sensor checking for the presence of a
ame. This is a period of 5 seconds.
Note: If no ame is sensed, the burner relay will attempt ignition 5 times before going into lock-out mode.
Post-purge time: This is the time of 10 seconds between burner shut-down and the moment the combustion fan (venter) is de-energized.
1801UDSBD-4E,--EN, Pag. 18/35
Page 19
13
MAINTENANCE/SERVICE
Warning : If you turn off the power supply, always turn off
the gas.
The material contained in the MAINTENANCE AND SERVICE
Section of this manual is designed to aid a qualied service
technician in maintaining and servicing this equipment. This
heater will operate with a minimum of maintenance.
To ensure long life and satisfactory performance, a heater that
is operated under normal conditions should be in-
Maintenance Schedule - The following procedures should be
carried out at least once each year (See gure 11a) :
• Clean all dirt, lint, and grease from the fan blade, fan guard,
and motor.
• Check the heat exchanger both internally and externally for
evidence of physical damage.
• Check the burner for scale, dust, or lint accumulation. Clean
if required.
Figure 11a : Location of controls
9
2
spected and cleaned at the start of each heating season
(inspection and maintenance at least once a year). If the
heater is operating in an area where an unusual amount of
dust or other impurities are present in the air, more frequent
maintenance is recommended.
When any service is completed, be careful to reassemble
correctly to ensure that no unsafe conditions are created.
When starting the heater, always follow the lighting instructions on the heater.
• Check the vent or vent/combustion air system for soundness. Replace any parts that do not appear sound.
• Check the wiring for any damage. Replace damaged
wiring.
NOTE: If replacement parts are required, use only
factory-authorized parts.
10
11
8
7
1
5
6
3
4
1) Burner
2) LC3 limit control
3) Burner operating led
4) Reset switch (S5)+burner
lockout
5) Spark ignitor (ER)
6) Control panel
7) Main gas valve (V1)
8) Venter motor.
9 Limit control LC1
10) Flame sensor (IS)
11) Modulating gas valve (VM)
1801UDSBD-4E,--EN, Pag. 19/35
Page 20
Figure 11b - Control panel assy located
14
on a removable bracket
3
2
4
1
1) Control relay (ER)
2) Terminal blocks
3) Pressure switch (S3)
4) Electronic burner relay fuse 3.15AF
HEAT EXCHANGER MAINTENANCE
This heater is equipped with a patented T-CORE2® heat exchanger.
Remove any external dirt or dust accumulation. Visually check the heat exchanger for cracks and holes. If a crack or hole is
observed, replace the heat exchanger.
1801UDSBD-4E,--EN, Pag. 20/35
Page 21
15
BURNER MAINTENANCE
This heater has a unique one-piece T-CORE2® burner assembly
designed to provide controlled ame stability without lifting or
ashback. The burner can be removed as a unit for inspection
or service : see below for removal instructions.
Instructions for burner removal
1. Outside the cabinet, shut the gas supply off at the manual
valve ahead of the union
2. Turn off the electric supply.
3. Disconnect the gas supply at the union outside of the cabinet.
4. Open the access door.
5. Disconnect the manifold and move it out of the way. At
the gas valve, mark and disconnect the connector. Carefully
remove the burner orice and orice adapter locking nut.
Slide the orice adapter out through the bracket on the burner
pushing the manifold to the right. This will move the manifold
out of the way. Refer to gure 14 for component denitions.
Figure 12a
Inspect the burner/control compartment annually to determine if cleaning is necessary. If there is an accumulation of
dirt, dust, and/or lint, clean the compartment and follow the
instructions below to remove and clean the burner.
Caution : use of eye protection is recommended.
6. Remove burner
a) Locate the burner body front support. Remove the
screws that attach it to the secondary air shield.
Refer to g. 14 for component denitions.
b) Holding the venturi tube, slide the entire burner
slightly to the right to disengage the burner from the
supports on the left. Then rotate the open end of the
venturi tube outward away from the heater. Carefully
pull the burner assembly out of the cabinet.
Figure 13a
Figure 12b
Burner orice
Locking nut
Figure 13b
Orice adapter
1801UDSBD-4E,--EN, Pag. 21/35
Page 22
Figure 14 - Burner removal steps
16
17
2. Remove screws attaching burner
2. Remove screws attaching burner
BURNER ORIFICE
The burner orice normally needs to be replaced only when a
change in gas is made. When ordering a replacement orice,
provide (MJ/m3) heating value and specic gravity of gas, as
well as the model and serial number of the unit. When remov-
ing or replacing the burner orice be careful not to damage the
venturi tube and/or the bracket.
IGNITION SYSTEM
3. Venturi tube : slide right, rotate
3. Venturi tube : slide right, rotate
outwards, pull out
outwards, pull out
Inspect and clean the burner
With the burner assembly removed, shine a ashlight on the
burner ribbons. Look for carbon buildup, scale, dust, lint, and/or
anything that might restrict ow through the spaces between the
burner ribbons. Holding the burner assembly so that any foreign
material will fall away from the burner, use a stiff bristle brush to
loosen and remove any foreign material(s). If the burner is excessively dirty, remove one of the burner end caps. Remove the
four screws that hold the end cap to the burner housing. Lightly
tap the end cap to remove it.
Clean all foreign material from the burner and venturi. After the
burner is thoroughly clean, replace the end cap making certain
that it is tight against the burner housing. NOTE: If any of the
burner components are damaged or deteriorated, replace the
burner assembly.
Figure 15
1. Disconnect manifold
1. Disconnect manifold
at orice and outside the
at orice and outside the
heater, slide to the right
heater, slide to the right
Ignitor - Refer to gure 11a and locate the ignitor. Disconnect
the wire; remove the screw and the ignitor. Clean the ignitor
assembly with an emery cloth.
Spark gap must be maintained to 3 mm. See FIGURE 16a.
Important : When reassembling, the wire must remain attached
to the ignitor.
Figure 16a
Ignitor showing required spark gap measurement
Inspect the Internal Portion of the Heat Exchanger (with
burner assembly removed)
At the burner ame entrance of each tube, shine a bright light
into each heat exchanger section. With the light shining into the
heat exchanger, observe the outside surface of the tube where
discoloration is evident. Repeat this procedure with each heat
exchanger tube. If any light is observed in these high temperature
regions, replace the heat exchanger.
Reinstall the burner
Repeat ‘Burner removal’ steps above in the opposite order.
Figure 16b
Flame sensor
Caution :
Due to high voltage on the spark wire and electrode, do
not touch when energized.
1801UDSBD-4E,--EN, Pag. 22/35
Page 23
Flame sensor - Refer to gure 11a and locate the ame sen-
18
19
sor. Disconnect the wire, remove the screw and the ame
sensor. Clean with an emery cloth..
Blower motor
Control relay - See gure 17. The electronic burner relay
monitors the operation of the heater including ignition. Do
not open the control relay. Each heating season check the
lead wires for insulation deterioration and good connections.
Proper operation of the direct spark ignition system requires
a minimum ame signal of 1.0 microamps (DC) as measured
by a microammeter.
For further information and check out procedure on the direct
spark ignition system, refer to section 12 and the Troubleshooting Flow Chart in section 25.
Figure 17 - Control relay Brahma TC340A
The blower motor is equipped with thermal overload
protection of the automatic reset type. Should the
motor fail to run, it may be because of improper voltage
characteristics. Make certain that the correct voltage is
available at the motor.
Centrifugal fan
Remove dirt and grease from the motor and the blower
wheel. Use care when cleaning the wheel to prevent causing
misalignment or imbalance.
Follow these instructions for replacement of the direct driven
centrifugal fan.
1. If the heater is installed, turn off the gas and disconnect
the electric power.
2. Open the connection box on the blower and disconnect
the fan motor wires.
3. Remove the blower.
4. Position the new blower on the heater.
5. Reconnect the fan motor wires according to the wiring
diagram and close the connection box on the blower.
6. Restore power to the heater and turn on the gas. Light,
following the instructions on the lighting instruction plate.
Check for proper operation.
1801UDSBD-4E,--EN, Pag. 23/35
Page 24
20
VENTER MOTOR & WHEEL
Remove dirt and grease from the motor casing, the venter
housing, and the venter wheel. Venter motor bearings are
permanently lubricated.
Follow these instructions for replacement of the venter motor
and wheel assembly. Keep all hardware removed to be used
in reassembling and installing the replacement parts.
1. Turn off the gas and disconnect the electric power.
2. Open the control compartment access door.
3. Disconnect the three venter motor wires at the control relay
and ground screw (located on the control panel).
4. Holding the motor, remove the screws that attach the motor
plate to the venter housing. Remove the motor and wheel
assembly from the heater.
5. Reassemble with the replacement venter motor and wheel
assembly.
6. Follow the wiring diagram to properly connect the wires.
7. Restore power to the heater and turn on the gas. Light,
following the instructions on the lighting instruction plate.
Check for proper operation. Replace the access door.
Venter wheel position on shaft
Figure 18a
Figure 18b
UDSBD-4E mod. 025 - 030
(Rotation clockwise from motor shaft end)
Venter motor
plate
Motor cooling
fan
8 mm
Figure 18c
Venter
wheel
Motor
mounting
bracket
UDSBD-4E mod. 015 - 020
(Rotation clockwise from motor shaft end)
Venter motor
plate
Venter
wheel
8 mm
Motor
mounting
bracket
Motor
cooling fan
UDSBD-4E mod. 035 - 064
(Rotation counter clockwise from motor shaft end)
Venter motor
plate
Motor cooling
fan
8 mm
Motor
mounting
bracket
Venter
wheel
1801UDSBD-4E,--EN, Pag. 24/35
Page 25
OPERATING GAS VALVE
21
22
23
24
LIMIT CONTROLS
The main operating quick opening gas valve is powered through
the thermostat and safety controls. The main control valve is of
the diaphragm type providing regulated gas ow and is preset at
the factory. The gas valve requires no eld maintenance except
careful removal of external dirt accumulation and checking of
wiring connections. Instructions for testing pressure settings
are in section 12.
Warning:
The operating valve is the prime safety shutoff. All
gas supply lines must be free of dirt or scale before
connecting to the unit to ensure correct sealing.
COMBUSTION AIR PRESSURE SWITCH
DANGER
Safe operation of this unit requires proper venting
flow. Never bypass the combustion air pressure
swtich or attempt to operate the unit without the venter
operating.
The combustion air pressure switch ensures that proper com-
bustion airow is available. The switch senses the differential
pressure between the negative pressure in the ue gas collector
box and the pressure in the control section.
On startup when the heater is cold, the sensing pressure is at
the most negative level, and as the heater and ue system warm
up, the sensing pressure becomes less negative.
If a restriction or excessive ue pipe length causes the sensing
pressure to be below the allowable level, the pressure switch
will shut off the main burner.
If it is determined that the pressure switch needs replacing, use
only the factory-authorized replacement part that is designed
for the model and size of heater being serviced.
All units are equipped with temperature activated limit controls.
The controls are factory set and non-adjustable. If either setpoint is reached, the corresponding limit control will interrupt
the electric power to the gas valve. These safety devices
provide protection in the case of motor failure or lack of airow
due to restrictions. (For locations, see gure 11a.)
If a limit control needs replacing, use only the factory autho-
rized replacement part for the size of heater.
For approximate limit locations, see gure 11a.
Warning :
Never bypass the limit controls, hazardous conditions
could result.
Figure 20 : LC1
Figure 21 : LC3
Figure 22 : Location LC1/LC3
LC1
LC3
Figure 19
FLUE & COMBUSTION AIR
PIPING
Check the complete system at least once a year. Inspection
should include all joints, seams, concentric adapters and the
ue terminal cap. Replace any defective or heavily corroded
parts.
1801UDSBD-4E,--EN, Pag. 25/35
Page 26
5
2
The integrated control relay monitors the operation of the heater. If the heater fails to operate properly, review the ow chart
below and see the operating sequence in section 16.
The general troubleshooting charts on the following pages will also help you to determine the problem.
1/ Air heater does not operate and lock-out indicator light is off
TROUBLESHOOTING
5
5
1801UDSBD-4E,--EN, Pag. 26/35
Page 27
2/ Air heater does not operate and lock-out indicator light is on
1801UDSBD-4E,--EN, Pag. 27/35
Page 28
1801UDSBD-4E,--EN, Pag. 28/35
Page 29
1801UDSBD-4E,--EN, Pag. 29/35
Page 30
1801UDSBD-4E,--EN, Pag. 30/35
Page 31
General troubleshooting
PROBLEM PROBABLE CAUSE REMEDY
Venter motor will
not start
Burner will
not light
Burner cycle
on and off
Blower will not
run
Blower or venter
motor turns on
and off while
burner is operating
Venter
motor turns off in
case of thermal
overload
1. No power to unit
2. No power to venter motor
3. Integrated burner relay defective.
4. Defective venter motor.
5. Fluse blown (F3.1).
6. Fuse burner relay blown.
7. LC1 open.
8. LC3 open.
9. Unit in lock-out.
10. Room thermostat open.
1. Main valve not operating
2. Air in the gas line.
3. Gas pressure too high or too low.
4. No spark:
a) Loose wire connections.
b) Incorrect spark gap.
c) Spark cable has a short circuit to ground.
d) Spark electrode has a short circuit to ground.
e) Burner relay not grounded.
f) Unit not properly grounded.
g) Faulty burner relay.
5. Combustion airs pressure switch not closing
upon power to venter.
1. Gas pressure too high or too low.
2. Burner relay not grounded.
3. Faulty burner relay.
4. Flame sensor grounded.
5. Cracked ceramic at sensor.
6. Incorrect polarity.
1. Circuit open.
2. Defectivetime delay relay for the fan (KFC).
3. Defective motor.
1. Motor internal thermal protection device cycling
on and off.
1. Electrical current too high or too low
2. Motor defect
3. Air ow insufcient
4. Faulty bearing
1. Turn on power, check supply fuses or circuit breaker.
2. Check connections at burner relay and/or venter motor terminals.
3. Replace burner relay.
4. Replace venter motor. See Section 26.
5. Replace fuse.
6. Replace fuse.
7. a) Set heater on ventilation until LC1 closes.
b) Replace LC1.
c) Check if there is obstruction at the fan side.
8. a) Reset LC3.
b) Replace LC3.
9. Push on reset button.
10. Set thermostat above room temperature.
1. a) Check voltage on valve during ignition period.
b) Check connector on main gas valve.
c) Check connector on burner relay.
d) Replace valve.
2. Purge gas line.
3. a) Supply pressure should be 15 mbar for natural gas (UK only) or 37
mbar for propane gas (UK only).
b) Obstruction in the gas line.
c) Gas line connection diameter too small.
4. Check the following:
a) Be certain all wire connections are solid.
b) Maintain spark gap at 3 mm.
c) Replace worn or grounded spark cable.
d) Replace if ceramic spark electrode is cracked or grounded.
e) Check burner relay ground wire.
f) Make certain unit is properly eld grounded (earthed) and properly
phased
(L1 to hot lead, L2 to neutral).
g) If voltage is available to the burner relay and all other causes have been
eliminated, replace burner relay.
5. First check the following:
a) Make sure unit is properly vented.
b) Remove obstructions from vent.
c) Replace faulty tubing to pressure switch.
d) Replace faulty pressure switch.
1. Supply pressure should be 15 mbar for natural gas (UK only) or 37 mbar
for propane gas (UK only).
2. Check burner relay ground wire connection.
3. If (220/240) volts is available to the burner relay and all other causes have
been eliminated, replace burner relay.
4. Be certain ame sensor lead is not grounded or insulation or ceramic is
not cracked. Replace as required.
5. Replace sensor.
6. Check polarity switch and if necessary reverse line voltage wires to terminal block connections.
1. Check wiring and connections.
2. a) Replace the time delay relay.
b) Check voltage on anticipation resistor when gas valve is open.
3. Replace blower & motor.
1. Check motor load against motor rating plate. Replace motor if needed.
1. Correct
2. Replace motor
3. Clean motor, venter & lter
4. Oil bearing or replace motor
1801UDSBD-4E,--EN, Pag. 31/35
Page 32
2
26
PARTS LIST
Description
5
Control relay UDSBD015 … 064 03 25321
Spark ignitor UDSBD015 … 064 05 25162
Flame sensor UDSBD015 … 064 03 401US 195292
Limit control LC3 UDSBD015 … 064 03 24959 03
Limit control LC1 UDSBD015 … 064 03 24959 04
Pressure switch UDSBD015/020/025/050/055/064 30 60621 120
Pressure switch UDSBD 030 30 60621 100
Pressure switch UDSBD 035-043 30 60621 94
Burner-on indication lamp UDSBD015 … 064 60 61997
Reset switch UDSBD015 … 064 60 61998
gas valve nat gas 2st. UDSBD015…..043 03 25141 P
gas valve prop 2st. UDSBD015…..043 03 25141 P337
gas valve nat gas modureg UDSBD015…..043 03 25140 M
gas valve prop modureg UDSBD015…..043 03 25140 M
gas valve nat gas 2st. UDSBD050…..064 03 25136 02
gas valve prop 2st. UDSBD050…..064 03 35136 P437
gas valve nat gas modureg UDSBD050…..064 03 25136 M
gas valve prop modureg UDSBD050…..064 03 25136 M
Venter motor UDSBD015 … 020 11 43430 01
Venter motor UDSBD025 … 064 11 43426 04
Venter assembly UDSBD015 … 020 35 25218
Venter assembly UDSBD025 … 030 35 25222
Venter assemly UDSBD035 … 064 35 25223
Venter wheel assy UDSBD015 … 020 90 82242
Venter wheel assy UDSBD025 … 030 90 82244
Venter wheel UDSBD035 … 064 02 25728
Direct driven blower DD 9/7 UDSBD015 … 020 01 27211
Direct driven blower DD 10/10 UDSBD025 … 030 01 27210
Direct driven blower DD 12/12 UDSBD035 … 064 02 26012 035064
Main wiring assy UDSBD015 … 064 06 41852
Application
UDSBD-4E
Partnumber
1801UDSBD-4E,--EN, Pag. 32/35
Page 33
CERTIFICATE
EC DECLARATION OF CONFORMITY OF MACHINERY
(Annex II 1 A of EC Machinery Directive 2006/42/EC)
Nortek Global HVAC Belgium nv
J&M Sabbestraat 130/A000
B-8930 Menen, Belgium
Hereby declares that the following gas-red unit heaters:
UDSBD-4E
Types 015, 020, 025, 030, 035, 043, 050, 055, 064
Complies with the requirements of the above mentioned machinery directive
Complies with the requirements of further directives, namely
GAD 2009/142/EC - EMC 2014/30/EU – LVD 2014/35/EU
The following harmonized standards have been applied:
EN 1020: Non-domestic gas-red forced convection air heaters for space heating
not exceeding a net heat input of 300 kW, incorporating a fan to assist transportation of combustion air and/or combustion products.
The following notied body
Technigas
Chaussée de Vilvorde 156
BE 1120 Brussels
has been involved with regarding to the
EC type examination number E0827/5331
Menen, 31.01.2018
J. Dubus
Engineering Team Leader
1801UDSBD-4E,--EN, Pag. 33/35
Page 34
[kW] 14,77 18,35 25,75 29,59 35,06 43,01 49,47 55,69 65,45
[kW] 8,83 8,96 12,64 14,56 17,25 21,14 24,31 27,31 31,99
[kW] 0,04 0,04 0,08 0,08 0,08 0,08 0,08 0,08 0,08
[kW] 0,04 0,04 0,08 0,08 0,08 0,08 0,08 0,08 0,08
[kW] 0,02 0,02 0,02 0,02 0,02 0,02 0,02 0,02 0,02
[%] 83,8 83,4 83,6 84,0 83,7 84,6 84,4 84,3 84,2
[%] 81,8 81,4 82,0 82,7 82,4 83,1 82,9 82,7 82,3
[%] 0 0 0 0 0 0 0 0 0
[kW] 0,02 0,02 0,02 0,02 0,02 0,02 0,02 0,02 0,02
[%] 92,9 93,9 93,9 93,9 94,4 94,6 94,6 94,6 94,6
[%] 72,8 74,4 74,8 75,5 75,8 76,9 76,7 76,6 76,4
[%] 93,1 92,6 92,8 93,3 93,0 93,9 93,7 93,6 93,5
[mg/kWh] 98,0 97,5 93,3 94,3 98,6 97,2 94,5 90,1 92,9
Informaon requirements for warm air heaters Commission Regulaon (EU) 2016/2281
B1 warm air heater: [NO]
C2 warm air heater: [NO]
C4 warm air heater: [NO]
Type of fuel: [GAS: G20/G25]
Model: UDSBD-4E 015-4E 020-4E 025-4E 030-4E 035-4E 043-4E 050-4E 055-4E 064-4E
Item: Symbol: Unit:
rated,h
Capacity:
Rated heang capacity: P
Minimum capacity: P
min
Electric power consumpon*:
At rated heang capacity: el
sb
min
max
At minimal capacity: el
In standby mode: el
Useful eciency:
pl
Other items:
env
Envelope loss factor: F
nom
Useful eciency at rated heang capacity*: η
Useful eciency at minimum capacity*: η
x
ign
Ignion burner power consumpon*: P
s,ow
Emissions of nitrogen oxides [input energy (GCV)]*: NO
Emission eciency: η
th
s,h
Nortek Global HVAC Belgium NV; +32 (0)56 52 95 11; J&M Sabbestraat 130/A000; B-8930 Menen; West-Flanders; Belgium; www.reznor.eu
ErP seasonal space heang energy eciency: η
Thermal eciency at rated heang capacity [NCV]: η
* not required for electric warm air heaters
Contact details:
1801UDSBD-4E,--EN, Pag. 34/35
Page 35
NORTEK GLOBAL HVAC Belgium nv
J&M Sabbestraat 130/A000
B-8930 Menen, Belgium
Tel +32(0)56 52 95 11
www.reznor.eu
1801UDSBD-4E,--EN, Pag. 35/35
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