Nortek REZNOR UDSBD 015-3 Guide

1611UDSBD-3GBEN

UDSBD 015-3, 020-3, 025-3, 030-3

Gas ﬁred Balanced ﬂue / Fan assisted ﬂue

unit heater with centrifugal fan

These appliances meet the following EC Directives:

DIR 2009/142/EC:GAD

DIR 2014/30/EU:EMC

DIR 2014/35/EU:LVD

DIR 2006/42/EC:MD

INSTALLATION

COMMISSIONING

SERVICING

WARNING

Please read this document carefully before commencing installation, commissioning and/or servicing.

Leave it with the user or attached to the appliance or gas service meter after installation.

Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death.

All work must be carried out by appropriately qualiﬁed persons.

The manufacturer does not take any responsibility in the event of non-observance of the regulations concerning

the connection of the apparatus causing a dangerous operation possibly resulting in damage to the apparatus and/or

environment in which the unit is installed.

1611UDSBD-3GBEN, Pag. 2/36

INDEX

Warnings ..........................................................................................................................3

1. General.......................................................................................................................4

2. Installation codes .......................................................................................................4

3. Warranty.....................................................................................................................4

4. Uncrating and preparation..........................................................................................4

5. Dimensions ................................................................................................................5

6. Technical data ............................................................................................................8

7. Flue requirements.......................................................................................................10

8. Unit heater location....................................................................................................15

9. Hanging the unit.........................................................................................................16

10. Gas piping and pressures ...........................................................................................17

11. Electrical supply and connections..............................................................................18

12. Check installation and start up...................................................................................20

13. Maintenance schedule................................................................................................24

14. Heat exchanger maintenance .....................................................................................25

15. Burner maintenance...................................................................................................26

16. Burner oriﬁce.............................................................................................................28

17. Ignition system...........................................................................................................29

18. Blower motor.............................................................................................................29

19. Centrifugal fan...........................................................................................................33

20. Venter motor and wheel .............................................................................................30

21. Gas valve....................................................................................................................31

22. Combustion air pressure switch.................................................................................31

23. Limit controls.............................................................................................................32

24. Flue and combustion air system.................................................................................32

25. Troubleshooting .........................................................................................................34

26. Parts list......................................................................................................................35

1611UDSBD-3GBEN, Pag. 3/36

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.

Warnings

FOR YOUR SAFETY

Do not store or use petrol or other ﬂammable vapours and liquids in the

vicinity of this or any other appliance.

WARNING: Improper installation, adjustment, alteration, service or main-

tenance can cause property damage, injury or death. Read the installation,

operation, and maintenance instructions thoroughly before installing or

servicing this equipment.

WARNING :Do not use this appliance if any part has been immersed in water.

Immediately call a qualiﬁed service technician to inspect the appliance and

replace any gas control that hes been immersed in water.

WARNING : Gas-ﬁred appliances are not designed for use in hazourdous

atmospheres containing ﬂammable vapors or combustible dust, in atmospheres

containing chlorinated or halogenated hydrocarbons or in applications with

airborne silicone substances.

WARNING : 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.

WARNING : 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.

1611UDSBD-3GBEN, Pag. 4/36

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 speciﬁcations 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.

3. Warranty

4. Uncrating

and

preparation

Warranty is void if :

a. Wiring is not in accordance with the diagram furnished with the heater.

b. The unit is installed without proper clearances as soon as clearances are

required regardless of the material being combustible.

c. A fan model is connected to a duct system or if the air delivery system is

modiﬁed.

These units must be installed in accordance with BS6230 or BS5440 as appropriate

plus all local building codes.

1. General Models UDSBD 015-3 through 030-3 are design certiﬁed to the CE EN1020 stan-

dard for use in industrial and commercial installations only. All models and sizes

are available for use with either natural, propane or butane gas with operating tem-

perature between -15°C and 40°C. 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 cor-

rect 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 qualiﬁed installer in accordance with

these instructions. The installer is responsible for the safe installation of the heater.

2. Installation

codes

1611UDSBD-3GBEN, Pag. 5/36

5. Dimensions & Clearances (horizontal orientation = standard)

Top view

Front view

Legend:

1. Combustion air inlet

2. Flue connection

3. External gas connection

4. Electrical connections

5. Service panel

Rear view

Side view

Figure 1a : UDSBD 015-3 -> 020-3

Table 1a : Dimensions (mm)

M N

A C

U V

UDSA-3 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

1611UDSBD-3GBEN, Pag. 6/36

Figure 1b : UDSBD 025-3, 030-3

Top view

Front view

Rear view

Side view

4 3

Rear view mod. 035-2, 043-2 & 050-2

1 2

Rear view mod. 055-2 & 064-2

Table 1b : Dimensions (mm)

M N

A C

U V

UDSA-3 A A1 B C D E F G H J K L M N P Q R

025-030 586 590 700 546 404 1185 546 367,5 191 222 122 121 413 15,5 98 350 140

Legend:

1. Combustion air inlet

2. Flue connection

3. External gas connection

4. Electrical connections

5. Service panel

1611UDSBD-3GBEN, Pag. 7/36

Clearances (mm) 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.

Attention :

The clearance distance from the ﬂue system must be minimum 150mm at all

points !

Combustion air

supply and ﬂue

system diameters -

Diameter gas

connection

Table 2 : Clearances (mm)

Table 3 :

(*) : Heaters can be base mounted on suitable non combustible supports.

UDSA-3 015 020 025 030

Ø ﬂue/ air inlet (mm) 80 80 100 100

Ø gas connection 1/2” 1/2” 1/2” 1/2”

UDSA-3 X Y Z (*) U V

015 - 030 100 130 50 270 850

1611UDSBD-3GBEN, Pag. 8/36

6. Technical

data The UDSBD-3 units are ﬁtted with a new type of Nicotra blower with EC motor.

The blower can be used on a variety of different speeds. The motor speed is

adjustable by use of a potentiometer (see table below ).

The units leaving the factory are set to the speed requested by the customer. The

curves shown in the ﬁgures 2a/2b, illlustrate for each unit which speeds can be

chosen in order to get another air duty.

Table 4 : Technical data

1) Gas Appliance Classiﬁcations 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 deﬂection.

4) Height from ﬂoor 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 airﬂow, 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 signiﬁcant stratiﬁcation may occur resulting in poor ﬂoor coverage and higher energy losses through the roof structure.

5) Isothermal conditions +/-20°C ambient air temperature, discharge louvres zero deﬂection, v = 0,5m/s. The air throw will be inﬂuenced 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 ﬁeld 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

Type UDSBD 015-3 020-3 025-3 030-3

Gas category II2H3+

Comb. air & ue, type B (1) B22

Comb. air & ue, type C (1) C12, C32, C42, C52, C62, C82

Dia ue outlet/combustion air inlet mm 80 80 100 100

Heat input Hs kW 17,6 22 30,8 35,2

Heat input Hi kW 15,9 19,8 27,8 31,7

Heat output kW 14,6 18,2 25,5 29,2

ermal eciency % 92 92 92 92

Gas consumption

natural gas G20 m³/h 1,68 2,1 2,94 3,36

propane G31 kg/h 1,24 1,55 2,16 2,47

Gas pipe connection (2) 1/2”

Temperature rise (3) K 20 23 27 25

Airow (3) m³/h 2150 2350 2750 3360

Recommended mounting height (4) m 3,5 4 4,5 4,5

Horizontal throw (5) m 18 23 26 26

Sound pressure (6) dB(A) 50 52 47 51

Sound pressure (7) dB(A) 57 58 54 58

Electrical service (protection IP20) 230/240V 1N ~50Hz

Max. total electrical rating W 496 496 1662 1662

Weight (net) kg 50 53 71 74

1611UDSBD-3GBEN, Pag. 9/36

Figure 2a : Blower curve for UDSBD 015-3/020-3

Figure 2b : Blower curve for UDSBD 025-3/030-3

1611UDSBD-3GBEN, Pag. 10/36

7. Flue

requirements

Model UDSBD-3 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 efﬁciently with either a horizontal or

verticalﬂuesystemwheninstalledwiththespeciﬁcrequirements and instructions.

If this heater is replacing an existing heater, be sure that the ﬂue is sized properly

for the heater being installed and that the existing ﬂue is in good condition. A

properly sized ﬂue system is required for safe operation of the heater.An improp-

erly sized ﬂue system can cause unsafe conditions and/or create condensation.

The air heaters may be installed as a balanced ﬂue (type C) heater requiring both

a combustion air inlet duct and a ﬂue 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 ﬂue pipe exhausting to outdoors.

All products of combustion must be ﬂued to outdoor atmosphere.

Each heater installed as a type B appliance must be ﬁtted with an individual ﬂue

pipe and the combustionair inlet opening is providedwith a protection grill. Each

heater installed as a type C appliance must be ﬁtted with an individual combus-

tion air/ﬂue pipe system. Type C2 appliance, with single duct system for supply

of combustion air and evacuation of ﬂue gasses, are not allowed.

IMPORTANT :

Theﬂuemust beinstalled in accordancewithnationalandlocalregulations.

Failuretoprovideproperﬂueingcouldresultindeath,seriousinjury and/or

property damage. The air heatermust be installed with a ﬂue to the outside

of the building. Safe operation of any power vented gas apparatus requires

a properly operating ﬂue system, correct provision for combustion air and

regular maintenance and inspection.

This manual suits for next models

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