Nortek UDSA073-4E, UDSA100-4E, UDSA050-4E, UDSA043-4E, UDSA035-4E Installation, Commissioning, Servicing

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Page 1

Revision: I-UDSA-UK (02-19) PN 06 00116 UDSA R3

Supersedes: 1711UDSA-4E_GBEN

GAS FIRED BALANCED FLUE/FAN ASSISTED FLUE

UNIT HEATER

UDSA-4E

INSTALLATION

COMMISSIONING

SERVICING

These appliances meet the following EC direcves

(EU) 2016/426: GAR

DIR 2014/30/EU:EMC

DIR 2014/35/EU:LVD

DIR 2006/42/EC:MD

Please read this document carefully before commencing installaon, commissioning and/or servicing.

Leave it with the user or aached to the appliance or gas service meter aer installaon.

WARNING

Improper installaon, adjustment, alteraon, service or maintenance can cause property damage, injury or death. All work must be carried out by appropriately qualied persons. The manufacturer does not take any responsibility in the event of non-observance of the regulaons concerning the connecon of the apparatus causing an evil operaon possibly resulng in damage to the apparatus and/or environment in which the unit is installed.

Subject to modicaons

Page 2

INDEX

Warnings 2

1. General 2

2. Installation codes 2

3. Warranty 2

4. Uncrating and preparation 2

5. Dimensions 3

6. Technical data 5

7. Flueing requirements 6

8. Unit heater location 9

9. Hanging the unit 9

10. Gas piping and pressures 10

11. Electrical supply and connections 11

12. Check installation and start up 13

13. Maintenance schedule 16

14. Heat exchanger maintenance 17

15. Burner maintenance 18

16. Burner orice 19

17. Ignition system 19

18. Fan assembly 20

19. Venter motor and wheel 21

20. Gas valve 22

21. Combustion air pressure switch 22

22. Limit controls 22

23. Flue and combustion air system 22

24. Troubleshooting 23

25. Parts list 29

GENERAL

Models UDSA-4E are design certied 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 qualied installer in

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

INSTALLATION CODES

These units must be installed in accordance with BS6230 or BS5440 as appropriate plus all local building 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-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.

Should overheating occur, or the gas supply fail to shut o󰀨, shut o󰀨 the manual gas valve to the appliance before shutting o󰀨 the electrical supply.

Do not use this appliance if any part has been immersed

in water. Immediately call a qualied service technician to

inspect the appliance and replace any gas control that has 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

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 modied.

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 specications

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.

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 2

Page 3

DIMENSIONS/CLEARANCES (horizontal orientation=standard)

Figure 1a : Dimensions/clearances (models 011→100)

Top view

Side view

Front view

Rear view

(models 035,

043, and 050)

Rear view

(models

015→030 and

055→100)

1. Combustion air inlet

2. Flue connection

3. External gas connection

4. Electrical connections

5. Service panel

Table 1a : Dimensions (mm) for Models 011→100

UDSA-4E A B C D E F G H J K L M N P Q R S* T*

011 307 700 267 404 696 546 131 191 129 67 85 413 15,5 98 350 120 413 250 015→020 383 700 343 404 723 546 199,5 191 139 122 86 413 15,5 98 350 120 413 450 025→030 586 700 546 404 771 546 367,5 191 222 122 121 413 15,5 98 350 140 622 400 035→050 510 970 456 601 1033 897 371 194 126 158 121 622 33 149 600 140 622 500 055→064 663 970 609 601 1052 897 354 206 150 165 204 622 33 149 600 225 622 500

073 866 1040 812 651 1036 897 562 212 299 185 204 672 33 149 600 225 672 500

085 866 1040 812 651 1139 897 562 212 299 185 204 672 33 149 600 225 672 500

100 866 1040 812 651 1097 897 562 212 299 185 204 672 33 149 600 225 672 500

*Rear suspension point dimensions

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 3

Page 4

Figure 1b : Dimensions/clearances (models 120 and 145)

T T

Top view

Front view

Q Q

Side

view

1. Combustion air inlet

2. Flue connection

3. Gas connection

4. Electrical connections

Rear

view

Table 1b : Dimensions (mm) for Models 120 and 145

UDSA-4E A B C D E F G H J K L M N O P Q R S T

120 1367 1150 1313 651 1034 896 1105 312 603 290 139 676 36 300 148 600 225 147 600

145 1494 1150 1440 651 1034 896 1206 312 665 290 139 676 36 300 148 600 225 147 600

Clearances (mm)

Units must be installed so that the minimum clearances in Table 2 are provided for combustion air space, inspection and service and for proper spacing from combustible materials.

Table 2 : Clearances (mm)

UDSA-4E X Y Z (*) U V

011→030 450 50 850

035→145 450 100 850

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

Combustion air supply and ue system diameters

Table 3 : Gas Connection Diameters

Flue/air inlet diameter (mm) 80 100 130 Gas connection diameter (inches) 1/2 3/4 1

Diameters

008 011 015 020 025 030 035 043 050 055 064 073 085 100 120 145

Attention :

The clearance distance from the ue

system must be a minimum of 150

mm at all points !

UDSA-4E

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 4

Page 5

TECHNICAL DATA

Table 4 : Technical data

UDSA-4E 0 11 015 020 025 030 035 043 050 055 064 073 085 100 120 145

Gas category II2H3+ Combustion air and ue,

type B installation (1) Combustion air and ue,

type C installation (1) Flue and

combustion air connection collars

Heat input (Hs) kW 13,2 17,6 22 30,8 35,2 41,8 50,8 58,6 66 77,7 88 102,7 117,3 155.5 176.1 Heat input (Hi) kW 11,9 15,9 19,8 27,8 31,7 37,7 45,8 52,8 59,5 70 79,3 92,5 105,7 140.0 158.6 Heat output kW 11 14,6 18,2 25,5 29,2 34,7 42,1 48,6 54,7 64,4 73 85,1 97 127.5 145.8 Thermal

e󰀩ciency

Gas consumption: natural gas (G20)

Gas consumption: propane (G31)

Gas connection size, not supply line (2)

Temperature rise K 32 29 28 27 Air ow m³/h 1020 1360 1700 2385 2725 3510 4535 5180 5830 6810 7770 9065 10360 13608 15552 Motor speed rpm 1390 1450 930 1250 920 910 1360 940 930 900 890 1050 930 900 Recommended

mounting height (3)

Horizontal throw (4)

Sound pressure (5)

Electrical service, class IP20

Total electrical rating

Weight (net) kg 33 38 40 54 57 86 99 102 114 118 143 160 179 245 263

mm 80 100 130

% 92 91.1 91.9

m³/h 1,26 1,68 2,1 2,94 3,36 3,99 4,85 5,59 6,3 7,41 8,39 9,79 11,18 14.81 16.78

kg/h 0,93 1,24 1,55 2,16 2,47 2,94 3,57 4,12 4,64 5,46 6,18 7,21 8,24 10.92 12.36

inch 1/2 3/4 1

m 3 4

m 10 13 16 20 25 28 32 35 33 41 39 33 41

dB(A) 46 47 48 43 49 44 45 56 51 52 54 55 60 55 57

W 121 126 273 270 290 500 770 960 1150 1680

C12, C32, C42,C52, C62, C82

230/240V 1N ~ 50Hz

B22

1) Gas Appliance Classications for Approved Venting Methods based on CEN-report CR1749:2001.

2) There is a dierence between the gas connection diameter and the diameter of the supply line. Always use the most adequate dia 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) Height from oor to bottom surface of heater. These are recommendations only. Positioning of unit heaters for proper performance is application

dependent. Operation is aected by other air moving equipment in the space, obstructions to the airow, 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 signicant stratication may occur resulting in poor oor coverage and higher energy losses through the roof structure.

4) Isothermal conditions +/-20°C ambient air temperature, discharge louvres zero deection, v = 0,5m/s. The air throw will be inuenced by the height

of the building, mounting height of the unit, ambient temperature & adjustment of the louvres.

5) Sound pressure measured in dB(A) : at 5m distance of the heater with A=160m² & Q=2

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 5

Page 6

FLUE REQUIREMENTS

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.

Model UDSA-4E heaters may be installed as Type-B and Type-C installations.

Flue must be in accordance with BS6230 or BS5440. Local requirements may apply in addition to national requirements. These unit heaters are designed to operate safely and ef-

ciently with either a horizontal or vertical ue system when installed with the specic 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.

Table 5 : Maximum ue system pipe lengths

Heater socket and pipe diameter (mm) Flue pipe/inlet pipe 80 100 130

Maximum straight length (with wall/roof terminal) (m) Flue pipe/inlet pipe 9*

Equivalent length of 45° elbow (m)

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.

All products of combustion must be ued to outdoor atmo-

sphere.

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 appliances with single-duct system for supply of combustion air and evacuation of ue gasses

are not allowed.

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.

UDSA-4E 011→020 025→050 055→145

Flue pipe/inlet pipe 0.75

Equivalent length of 90° elbow (m)

Flue pipe/inlet pipe 1.5

Equivalent length of 90° elbow (m)

Flue pipe/inlet pipe

• Use only one ue pipe diameter on an installation.

• Recommended minimum ue is 1m.

* Mentioned lengths apply only when :

- no elbow installed immediately after ue and inlet

- successively installation of several elbows without straight pipe

2.5 NA

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 6

Page 7

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.

Warning:

Single wall ue pipe exposed to cold air or run through

unheated areas should be insulated to avoid condensation.

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.

For testing, the ue pipe should include a sealable test port.

Ideally the test port should be at least 450 mm away from the

air heater ue connection socket. However if a concentric ue tting is attached directly to the connection sockets then the combustion should be tested through the ue outlet collar via a

drilled test port which must be securely plugged on completion.

Follow the ue pipe manufacturers installation instructions for

making joints, including connections to the air heater, for passing through a building element and for support requirements.

Gasket sealed 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.

Figure 3 : Type B appliances : combustion air and ue pipe sockets

All models except 035-4E, 043-4E, 050-4E, and 100-4E

Models 035-4E, 043-4E, and 050-4E only

Model 100-4E only

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 2 : Approved appliances type B

B22 - roof

B22 - wall

1) Flue pipe outlet collar

2) Combustion air inlet opening

3) Protection grill (option) (02 25094)

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 7

Page 8

AIR SUPPLY

Warning: 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 proong. 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

inltration 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.

Figure 4 : Approved appliances type C

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 (see Figure 3).

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.

Type C2 appliances must not be applied !

C32/C62C12

Figure 5 : Type C appliances : combustion air and ue pipe sockets

All models except 035-4E, 043-4E, and 050-4E Models 035-4E, 043-4E, and 050-4E only

1) Flue pipe outlet collar

2) Combustion air pipe inlet collar

C12b/C62

C52

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 8

Page 9

LOCATION OF HEATER

HANGING THE 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 a󰀨ect 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. Recommended minimum height is 2.5 mm.

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 recom-

mended height can result in signicant air stratication. When

possible, heaters should be arranged to blow toward or along exposed wall surfaces.

Suspended heaters are most e󰀨ective 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 airow will be deected 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.

Warning: Check the supporting structure to verify

that it has su󰀩cient 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 su󰀩cient load-carrying capacity to support

the weight (refer to Table 6a) of the unit.

Table 6a : Unit Weights

UDSA-4E Weight (kg) UDSA-4E Weight (kg)

011 33 055 114 015 38 064 118 020 40 073 143 025 54 085 160 030 57 100 179 035 86 120 245 043 99 145 263 050 102

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 Figure 6a for hanger rod size.

Caution : Do not locate the heater where it may be exposed to water.

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 precipitate 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 inltration 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 downow unit over the door opening.

Be sure that the threaded hanger rods are locked to the heater as illustrated in Figure 6a. 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.

Most UDSA models can be mounted vertically using the rear suspension points, as shown in Figure 6b. When installing the heater in this manner, the minimum clearances listed in Table 6b must be observed.

Table 6b : Minimum Clearances (mm)

UDSA-4E

025→030

035→100

*See Figure 1a.

Y* Z* U*

800

1000

850 150

850 200

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 9

Page 10

Figure 6a : Suspending the heater with rods from the

threaded nut retainers

Add a nut to lock the M10x1.5 hanger rod to the heater

Detail

Figure 6b : Suspending the heater with rods using the rear suspension points

To reduce heat losses through the roof to a minimum and

to avoid the occurrence of stratication, it is recommended

that the unit be suspended in a vertical manner. This way of suspension allows the unit to operate as a heater and as a

destratication unit. This vertical orientation can only be used

for USDA-4E models 025, 030, 035, 043, 050, 055, 064, 073, 085, and 100.

Figure 7 : Wall bracket kits (optional)

Models 011-4E→030-4E Models 035-4E→100-4E

When desired the heaters may be supported by wall brackets. Supporting in this manner allows the heaters to be placed in close proximity to the ceiling or mounted directly to the vertical supporting structures of the building. There are two

di󰀨erent wall bracket designs for UDSA-4E models as shown

in Figure 7.

Mounting instructions are detailed in the literature supplied with these optional kits.

GAS PIPING & PRESSURES

All piping must be in accordance with requirements outlined in the National Gas Codes (di󰀨erent 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 liqueed

petroleum gas or any other chemical constituents of the gas being supplied.

Install a ground joint union and manual shuto󰀨 the gas cock

upstream of the unit control system.

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 10

Page 11

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 50 mbar : 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 50 mbar : Before testing, close the manual valve on the heater.

The unit is equipped with a nipple that extends outside the cabinet. The gas connection is 1/2-, 3/4-, or 1-inch, depending on the size of the unit.

Leak test all connections by brushing on a leak detecting solution.

ELECTRICAL CONNECTION

Table 7 : Diameter gas connection

UDSA-4E

011→030

035→100

120 and 145

Figure 8 : Gas connection

Warning: Do not over tighten and do not rotate the gas valve inside the heater control compartment.

Natural Gas/Propane

Connection

(Inches)

1/2

3/4

DANGER: THIS APPLIANCE MUST BE EARTHED.

The electrical installation may only be carried out by an

appropriately qualied 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 a󰀩xed 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 o󰀨 to ensure correct

operation of the unit.

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.

IMPORTANT: 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 (approximately 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 one 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 inuenced 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.

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 11

Page 12

WIRING DIAGRAM (for illustrative purposes)

Power Supply

REZNOR

External Controls

Mains Isolator-

Must be installed within

1 metre of the appliance

64 66

Other Controls

4 L

64 66

910

OT OT OT

OT C 4

L N

SmartCom3

C 9 10 64 66

21 41

C2C1C0

Lockout Lamp (240v)

Lockout Reset

Remote Enable (0-10VDC)

0-10V

Fan Only Function

C2C1

1-Phase

Permanent

Mains Supply

1-Phase

230v 50Hz

Heater Specification:

Modulating Burner Control (Brahma TC340A)

UDSA V4 - E Series

Controls Terminals

Heater Terminals

Legend:

NEUTRAL

*IMPORTANT*

'plug-in' jumper

Please remove

solid.

2. Terminals shown may not be in

1. Link wires MUST be fitted where shown

Notes:

LIVE

numerical order. Unused terminals may

D1D0B2B0B1

'OFF'

'ON'

200 metre run.

6A screened mains cable up to

communication by screened twisted pair

not be shown at all.

4. Controls cables 0.75mm² for up to

3. 1-Phase supply cable 2.5mm² minimum.

5. SmartCom sensor & remote 'on' use

cable. (e.g. Belden 9841) Connect

100 metre run.

6. SmartCom master-slave network

(Network version only)

Master/Salve Connections

Room or Return Air

Optional Thermistor

Remote

B.M.S. or

Switching

Optional Thermistor

Discharge Duct Sensor

sized to handle heater & motor

screen to terminal C0.

loadings.

7. Fuse rating must be sufficiently

Duct Sensor

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 12

Page 13

STARTUP

Check installation prior to startup

 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 startup

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.

• Ensure that all pressure test points (on the gas valve and

manifold) along with the pilot outlet plug (see Figures 9

and 10, item 6) are fully closed and gas tight.

• 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.

If the appliance does not operate, refer to and follow the instructions in TO TURN OFF GAS SUPPLY AT THE APPLIANCE below and call your service technician.

9. Thermostat calls for heat, energizing 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 operation, 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

o󰀨 automatically.

14. To turn the heater ‘OFF’ for long periods : see ‘To turn o󰀨 gas supply at the appliance’ below.

Check installation after startup

TO TURN OFF GAS SUPPLY AT THE APPLIANCE

1) Set thermostat to the lowest possible setting or ‘OFF’

position.

2) Shut o󰀨 the gas tap when the fan has stopped.

3) Switch o󰀨 electric power to the appliance.

 Check gas pressure as described in detail below.

 Turn the unit o󰀨 and on, pausing 2 minutes between each

cycle. Observe for smooth ignition.

 Set the thermostat to the required room temperature.

• Do not use this appliance if any part has subjected

to water ingress. Immediately call a qualied 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 o󰀨, shut the manual gas tap before turning o󰀨

the electric power.

Operating instructions and operating sequence

1. Set thermostat to the lowest setting.

2. Turn o󰀨 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).

 Place this booklet and any control or optional information

in an accessible location near the heater or give this information to the end user.

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 13

Page 14

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 correct operating gas pressure from heater’s

data plate * Adjust room thermostat control to its lowest setting * Remove screw from burner pressure test point of multi-

functional control valve and connect manometer to test

point (see Figures 9 and 10)

* Adjust room thermostat to call for heat (i.e., above room

ambient temperature)

* Observe burner gas pressure on manometer and compare

to required pressure on data plate

* If necessary, adjust burner gas pressure (only for natural

gas) by removing cover from regulator and turning regulator screw anti-clockwise to decrease pressure or clockwise to increase pressure

* Set room thermostat to lowest setting to turn OFF burners * Replace test point screw/cap and use leak detector uid

with main burner OFF to test for gas soundness

* Reset temperature control/room thermostat to comfort

operating level

Figure 9 : Gas valve (models 011-4E→043-4E)

Legend:

1) Shut-o󰀨 solenoid valve EV1 2a) Adjustment high re (large nut) 2b) Adjustment low re (small nut)

3) Inlet pressure test point

4) Outlet pressure test point

5) Shut-o󰀨 solenoid valve EV2

6) Pilot outlet

7) Main gas outlet

8) Holes (M5) for xing anges

Figure 10 : Gas valve (models 050-4E→145-4E)

2a/2b

Legend:

1) Shut-o󰀨 solenoid valve EV1 2a) Adjustment low re (large nut) 2b) Adjustment high re (small nut)

3) Inlet pressure test point (not visible on Figure 10)

4) Outlet pressure test point (not visible on Figure 10)

5) Shut-o󰀨 solenoid valve EV2

6) Pilot outlet

7) Main gas outlet

8) Holes (M5) for xing anges

Instructions for gas conversion: To convert the heater to/from natural gas (G20) or to/from propane (G31), refer to burner gas pressure adjustment (above) and perform the following steps:

* Using hex wrench, adjust burner jet to corresponding burner diameter listed in Table 8 * Adjust burner pressure to corresponding burner pressure listed in Table 8 * Check inlet pressure as listed below

Table 8 : Burner jets and pressures

Diameters/Pressures

Burner jet diameter (mm) 3.20 3.70 4.20 4.80 5.30 5.75 6.50 6.80 7.10 8.00 7.40 8.90 10.00 8.00 7.40 Burner pressure, high (mbar) 7.90 7.80 7.10 8.20 7.50 7.90 7.10 7.90 8.40 7.90 12.00 8.00 7.10 7.85 12.00 Burner pressure, low (mbar) 2.00 1.80 2.10 1.90 2.00 1.80 2.00 2.10 2.00 3.00 2.00 1.80 2.00 3.00

Burner jet diameter (mm) 1.70 1.95 2.15 2.60 2.80 3.10 3.35 3.70 3.90 4.15 4.50 4.90 5.20 4.15 4.50 Burner pressure, high (mbar) 36.90 36.80 36.00 35.90 35.80 35.70 35.60 35.10 34.60 34.50 34.80 34.40 Burner pressure, low (mbar) 15.60 15.20 15.10 15.00 14.80 14.60 14.70 14.50

*Inlet pressure = 20 mbar. Low re is 50% full rate. **Inlet pressure = 37 mbar. Low re is 65% full rate.

011 015 020 025 030 035 043 050 055 064 073 085 100 120 145

Natural Gas (G20)*

Propane (G31)**

UDSA-4E

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 14

Page 15

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.

Denitions

Start position: The system is not in lock-out position and can proceed with the startup sequence upon a demand for heat.

Pre-purge time: The 20-second period during which the combustion fan (venter) operates prior to activation of the ignition device.

Safety time: The safety time is the 5-second delay between the gas valve being energized and the ame sensor checking for ame.

NOTE: If no ame is sensed, the burner relay will attempt ignition ve times before going into lock-out mode.

Post-purge time: The 5-minute period between burner shut-down and the moment the combustion fan (venter) is de-energized.

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 15

Page 16

MAINTENANCE/SERVICE

Warning: If you turn o󰀨 the power supply, always turn o󰀨 the gas.

The material contained in the MAINTENANCE AND SERVICE section of this manual is designed to aid a qualied

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 inspected 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.

Figure 11a : Location of controls

NOTE: If replacement parts are required, use only factory-authorized parts.

• 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.

Maintenance Schedule - The following procedures should be carried out at least once each year (see Figure 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.

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)

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 16

Page 17

Figure 11b : Control panel assembly located on a removable bracket

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.

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 17

Page 18

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.

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.

Instructions for burner removal

1. Outside the cabinet, shut the gas supply o󰀨 at the manual

valve ahead of the union

2. Turn o󰀨 the electric supply.

3. Disconnect the gas supply at the union outside of the cabinet.

4. Open the access door.

Figure 12a :

5. Disconnect the manifold and move it out of the way. At the gas valve, mark and disconnect the connector. Carefully

remove the burner orice and orice adapter locking nut. Slide the orice adapter out through the bracket on the

burner pushing the manifold to the right. This will move the manifold out of the way. See Figure 14 for component

denitions.

6. Remove burner

a) Locate the burner body front support. Remove the

screws that attach it to the secondary air shield. See

Figure 14 for component denitions.

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 orice

Locking nut

Figure 13b :

Orice adapter

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 18

Page 19

Figure 14 : Burner removal steps

2. Remove screws attaching burner

BURNER ORIFICE

The burner orice normally needs to be replaced only when a change in gas is made. When ordering a replacement orice,

provide (MJ/m3) heating value and specic gravity of gas, as well as the model and serial number of the unit. When remov-

ing or replacing the burner orice be careful not to damage the

venturi tube and/or the bracket.

IGNITION SYSTEM

3. Venturi tube : slide right, rotate 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 sti󰀨 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

at orice and outside the

heater, slide to the right

Ignitor: See Figure 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

Figure 16b : Flame sensor

Caution : Due to high voltage on the spark wire and electrode, do not touch when energized.

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.

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 19

Page 20

Flame sensor: See Figure 11a and locate the ame sen-

Fan motor

Fan blade

sor. Disconnect the wire, remove the screw and the ame

sensor. Clean with an emery cloth..

Control relay: See Figure 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 re-

quires 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.

FAN MOTORS

Figure 17 : Control relay Brahma TC340A

The fan 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.

Remove dirt and grease from the motor, the fan guard, and blades. Use care when cleaning the fan blades to prevent causing misalignment or imbalance. Check that the hub of the fan blades is secure to the shaft. Follow these instructions for replacement of the fan guard, fan motor and/or fan blades.

1. If the heater is installed, turn o󰀨 the gas and disconnect the

electric power.

2. Open the access door and disconnect the fan motor wires.

3. Remove the fan assembly (fan guard, motor and fan blade).

4. Disassemble and replace parts as needed, then reassemble.

Be sure the fan blade is in the proper position on the shaft; refer to the illustration and table for types 011, 015, and 020.

Position the assembly on the heater and attach the fan guard.

Rotate the fan blade by hand to check for adequate clearance. If adjustment is required, loosen the mounting screws, reposition the fan guard, and tighten the screws. Rotate the fan blade and recheck for adequate clearance. Repeat this procedure until the assembly is positioned properly.

5. Reconnect the fan motor wires according to the wiring diagram and close the access door.

6. Restore power to the heater and turn on the gas. Light, following the instructions on the lighting instruction plate. Check for proper operation.

Dimension A

Typ e 011 015 020

mm 23 50 49

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 20

Page 21

VENTER MOTOR AND 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 o󰀨 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).

Venter wheel position on shaft

Figure 18a : Venter motor and wheel assembly

(models 011→020)

(Rotation clockwise from motor shaft end)

Venter motor

plate

Venter

wheel

Motor

mounting

bracket

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.

Figure 18b : Venter motor and wheel assembly

(models 025 and 030)

(Rotation clockwise from motor shaft end)

Venter

Venter motor plate

Motor cooling fan

wheel

Motor mounting bracket

Motor

cooling fan

8 mm

Figure 18c : Venter motor and wheel assembly

(models 035→100)

(Rotation counter-clockwise from motor shaft end)

Venter

motor

plate

Motor

mounting

bracket

Motor

cooling

fan

Venter

wheel

8 mm

Figure 18d : Venter motor and wheel assembly

(models 120 and 145)

(Rotation counter-clockwise from motor shaft end)

8 mm

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 21

Page 22

OPERATING GAS VALVE

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

shuto󰀨. 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 ow.

Never bypass the combustion air pressure switch or attempt to operate the unit without the venter operating.

The combustion air pressure switch ensures that proper com-

bustion airow is available. The switch senses the di󰀨erential pressure between the negative pressure in the ue gas collec-

tor 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 o󰀨 the main burner.

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 airow

due to restrictions. (For locations, see Figure 11a.)

If a limit control needs replacing, use only the factory authorized replacement part for the size of heater.

For approximate limit locations, see Figure 11a.

Warning: Never bypass the limit controls, hazardous conditions could result.

Figure 20 : LC1 Figure 21 : LC3

Figure 22 : Location: LC1/LC3

LC1

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.

Figure 19 :

LC3

FLUE AND 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.

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 22

Page 23

TROUBLESHOOTING

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 o󰀨

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 23

Page 24

2/ Air heater does not operate and lock-out indicator light is on

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 24

Page 25

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 25

Page 26

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 26

Page 27

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 27

Page 28

General troubleshooting

Problem Probable Cause Remedy

Venter motor will not start

Burner will not light

Burner cycles

on and o󰀨

Blower or venter motor turns on

and o󰀨

while burner is operating

1. No power to unit Turn on power, check supply fuses or circuit breaker

2. No power to venter motor Check connections at burner relay and/or venter motor terminals

3. Integrated burner relay defective Replace burner relay

4. Defective venter motor Replace venter motor (refer to section 26)

5. Fuse blown (F3.1) Replace fuse

6. Fuse burner relay blown Replace fuse

7. LC1 open Set heater on ventilation until LC1 closes Replace LC1 Check for obstruction at fan side

8. LC3 open Reset LC3 Replace LC3

9. Unit in lock-out Push on reset button

10. Room thermostat open Set thermostat above room temperature

1. Main valve not operating Check voltage on valve during ignition period Check connector on main gas valve Check connector on burner relay Replace valve

2. Air in the gas line Purge gas line

3. Gas pressure too high or too low Supply pressure should be 15 mbar for natural gas (UK only) or 37 mbar for propane gas

4. No spark Check following:

5. Combustion airs pressure switch

not closing upon power to venter and reset lamp is burning

1. Gas pressure too high or too low Supply pressure should be 15 mbar for natural gas (UK only) or 37 mbar for propane gas

2. Burner relay not grounded Check burner relay ground wire connection

3. Faulty burner relay If (220/240) volts is available to burner relay and all other causes have been eliminated,

4. Flame sensor grounded Ensure that ame sensor lead is not grounded or insulation or ceramic is not cracked;

5. Cracked ceramic at sensor Replace sensor

6. Incorrect polarity Check polarity switch and if necessary reverse line voltage wires to terminal block

1. Motor internal thermal protection

device cycling on and o󰀨

(UK only)

Obstruction in the gas line

Gas line connection diameter too small

Ensure that all wire connections are solid Maintain spark gap at 3 mm Replace worn or grounded spark cable Replace ceramic spark electrode if cracked or grounded Check burner relay ground wire

Ensure that unit is properly eld grounded (earthed) and properly phased (L1 to hot lead,

L2 to neutral) If voltage is available to burner relay and all other causes have been eliminated, replace

burner relay Check following in order: Ensure that unit is properly vented Remove obstructions from vent Replace faulty tubing to pressure switch Replace faulty pressure switch

(UK only)

replace burner relay

replace as required

connections Check motor load against motor rating plate; replace motor if needed

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 28

Page 29

Burner control All 03 25321

Control relay, DPDT 120 and 145 30 61742 240V

Control relay, SPST 120 and 145 30 61748

Spark ignitor All 05 25162

Flame sensor All 03 401US 195292

Limit control LC3

Limit control LC1 All 03 24959 04

Pressure switch

Burner on indication lamp All 60 61997

Reset switch All 60 61998

Gas valve natural gas modureg

Gas valve plug and wire

Two-stage head 011 →100 03 25249

Venter motor

Venter assembly 011 →020 35 25218

Venter motor assembly

Venter wheel assembly

Venter wheel 035→145 02 25728

Fan motor

Axial fan

ERP fan

Main wiring assembly All 06 41852

PARTS LIST

Description UDSA-4E Model Part Number

All except 120 and 145 03 24959 03

120 and 145 03 24959

All except 030, 035, 043, 073, and 145 30 60621 120

030 30 60621 100

035 30 60621 94

043 30 60621 94

073 30 60621 130

145 (start) 30 60617 75

145 (run) 30 60617 145

011 →043 03 25140M

050→145 03 35145

011 →043 03 25141 V1

050→145 03 25136 V1

011 →020 11 43430 01

035→100 11 43426 04

120 and 145 20 25745

025 and 030 35 25222

035→100 35 25223

011 →020 90 82242

025 and 030 90 82244

011 01 25630

015 and 020 01 25631

011 02 25701 01

015 02 25702

020 02 25702 01

025 01 27005

030 01 27006

035 and 043 01 27007 01

050 01 27009 01

055, 064, and 120 01 27011 01

073, 085, and 145 01 26063

100 01 27014 02

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 29

Page 30

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:

UDSA-4E Types 011, 015, 020, 025, 030, 035, 043, 050, 055, 064, 073, 085, 100, 120, 145 Complies with the requirements of the above mentioned machinery directive

Complies with the requirements of further directives, namely (EU) 2016/426: GAR - 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 notied body

Technigas Chaussée de Vilvorde 156 BE 1120 Brussels Has been involved with regarding to the EC type examination number E0677/5331

Menen, 08.08.2018

J. Dubus Engineering Team Leader

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 30

Page 31

Information Requirements for Warm Air Heaters Commission Regulation (EU) 2016/2281

B1 warm air heater NO

C2 warm air heater NO

C4 warm air heater NO

Type of fuel GAS: G20/G25

UDSA-4E 011 015 020 025 030 035 043 050 055 064 073 085 100 120 145

Capacity

Rated heating capacity

Minimum capacity P

kW 11.13 14.77 18.35 25.75 29.59 35.06 43.01 49.47 55.69 65.45 72.91 86.58 98.78 127.51 145.79

rated,h

kW 5.44 8.83 8.96 12.64 14.56 17.25 21.14 24.31 27.31 31.99 35.04 42.74 48.39 74.17 70.87

min

Electric Power Consumption*

At rated heating capacity

At minimal capacity

kW 0.04 0.08 0.32 0.35

max

kW 0.04 0.08 0.32 0.35

min

In standby mode elsbkW 0.02 0.03

Useful E󰀩ciency

Useful e󰀩ciency

at rated heating capacity*

% 84.2 83.8 83.4 83.6 84.0 83.7 84.6 84.4 84.3 84.2 82.8 84.3 84.2 82.0 82.8

nom

Useful e󰀩ciency at minimum capacity*

% 82.4 81.8 81.4 82.0 82.7 82.4 83.1 82.9 82.7 82.3 79.6 83.2 82.5 79.5 80.5

Other Items

Envelope loss factor

% 0

env

Ignition burner power consumption*

kW 0.02 0.03

ign

Emissions of nitrogen oxides (input energy

mg/

89.1 98.0 97.5 93.3 94.3 98.6 97.2 94.5 90.1 92.9 91.6 97.1 99.8 99.0 99.2

kWh

(GCV))*

Emission

e󰀩ciency

% 93.9 92.9 93.9 94.4 94.6 94.8 94.6 94.0 94.7

s,ow

ERP seasonal space heating

energy e󰀩ciency

% 74.5 72.8 74.4 74.8 75.5 75.8 76.9 76.7 76.6 76.4 74.2 77.2 76.7 72.4 74.6

s,h

Thermal e󰀩ciency

at rated heating

capacity (NCV)

% 93.5 93.1 92.6 92.8 93.3 93.0 93.9 93.7 93.6 93.5 93.9 93.6 93.7 91.1 91.9

*Not required for electric warm air heaters

Contact details: Nortek Global HVAC, www.reznor.eu

I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 31

Page 32

NORTEK GLOBAL HVAC (UK) LTD

Fens Pool Avenue

Brierley Hill

West Midlands DY5 1QA

United Kingdom

Tel 01384 489250

Fax 01384 489707

reznorsales@nortek.com

www.reznor.eu

Nortek Global HVAC is a registered trademark of the Nortek Global HVAC limited. Because of the connuous product innovaon, Nortek Global HVAC reserves the right to change product specicaon without due noce.

Nortek UDSA073-4E, UDSA100-4E, UDSA050-4E, UDSA043-4E, UDSA035-4E Installation, Commissioning, Servicing

Specifications and Main Features

Frequently Asked Questions

User Manual