Addison UHA 250, UHA 175, UHA 300, UHA 350, UHA 400 Installation, Operation & Service Manual

...

FOR YOUR SAFETY

WARNING

Installation must be done by a contractor qualified in the installation and service of gas-fired heating equipment or your gas supplier.

Improper installation, adjustment, alteration, service or maintenance can result in death, injury or property damage. Read the Installation, Operation and Service Manual thoroughly before installing or servicing this equipment.

Installer

Please take the time to read and understand

these instructions prior to any installation.

Installer must give a copy of this manual to the owner.

Owner

Keep this manual in a safe place in order to provide

your serviceman with necessary information.

If you smell gas:

1. Open windows.

2. DO NOT try to light any appliance.

3. DO NOT use electrical switches.

4. DO NOT use any telephone in your building.

5. Extinguish any open flame.

6. Leave the building.

7. Immediately call your local gas supplier after leaving the building. Follow the gas supplier’s instructions.

8. If you cannot reach your gas supplier, call the Fire Department.

WARNING

UHA-Series

Tubular Unit Heaters

(Standard Range)

Installation, Operation

& Service Manual

Models UHA[X][S]

150, 175, 200, 225

Fire Hazard

Keep all flammable objects, liquids and vapors the minimum required clearances to combustibles away from heater.

Some objects will catch fire or explode when placed close to heater.

Failure to follow these instructions can result in death, injury or property damage.

250, 300, 350, 400

Addison

7050 Overland Road Orlando, Florida 32810 Telephone: +1.407.292.4400 Fax: +1.407.290.1329

www.addison-hvac.com

P/N AD111101NA 10/12 Rev. A

AVERTISSEMENT

POUR VOTRE SECURITE

Si vous sentez une odeur de gaz:

1. Ouvrez les fenêtres.

2. N’essayez PAS d’allumer un appareil.

3. N’utilisez PAS d’interrupteurs électriques.

4. N’utilisez PAS de téléphone dans votre bâtiment.

5. Eteignez toute flamme nue.

6. Quittez le bâtiment.

7. Après avoir quitté le bâtiment, appelez immédiatement votre fournisseur local de gaz. Suivez les instructions du fournisseur de gaz.

8. Si vous ne pouvez pas joindre votre fournisseur de gaz, appelez le service d’incendie.

Risque d’incendie

Garder tous les objets, liquides ou vapeurs inflammables à la distance minimale de l’unité de chauffage requise avec les matériaux combustibles.

Certains objets prendront feu ou exploseront s’ils sont placés à proximité de l’unité de chauffage.

Le non respect de ces instructions peut entraîner la mort, des blessures corporelles ou des dommages matériels.

ATTENTION

Linstallation doit être effectuée par un installateur éprouvé/contractant qualifié dans linstallation et la maintenance du système de chauffage par infrarouge activé au gaz.

Linstallation, lajustement, laltération, le démarrage ou lentretien inadéquat peuvent causer la mort, des blessures ou des dégâts matériels. Lire entièrement le manuel dinstallation, dopération et dentretien avant linstallation ou l'entretien de cet équipement.

Installateur

Prenez le temps de lire et comprendre ces instructions

avant toute installation.

Linstallateur doit remettre au propriétaire

un exemplaire de ce manuel.

Propriétaire

Gardez ce manuel dans un endroit sûr pour

fournir des informations au réparateur

en cas de besoin.

UHA-Series

Aérothermes tubulaire

(Gamme standard)

Manuel d’installation,

d’operation, et de service

Modèles UHA[X][S]

150, 175, 200, 225 250, 300, 350, 400

Addison

7050 Overland Road Orlando, Florida 32810 Téléphone: +1.407.292.4400 Fax: +1.407.290.1329

www.addison-hvac.com

P/N AD111101FC 10/12 Rev. A

Addison

All rights reserved. No part of this work covered by the copyrights herein may be reproduced or copied in any form or by any means - graphic, electronic, or mechanical, including photocopying, recording, taping or information storage and retrieval systems - without the written permission of Addison.

TABLE OF CONTENTS

SECTION 1: Heater Safety...................................................... 1

1.1 Manpower Requirements .............................................1

1. 2 Sa fe ty L a bels and Their Placement ............................. 1

1.3 California Proposition 65 ..............................................1

2.1 Wall Tag .......................................................................5

2.2 Corrosive Chemicals.................................................... 5

2.3 National Standards and Applicable Codes ..................5

SECTION 3: Critical Considerations .....................................6

3.1 Basic Information.........................................................6

3.2 Manufactured Units...................................................... 6

3.3 Location and Suspension ............................................6

3.4 Minimum Required Installation Clearances .................6

3.5 Ventilation ....................................................................6

3.6 Gas Supply .................................................................. 6

3.7 Electrical Supply .......................................................... 6

3.8 Vent..............................................................................6

SECTION 4: Clearances TO combustibles............................ 7

4.1 Required Clearances To Combustibles........................7

4.2 Clearances To Combustibles .......................................7

SECTION 5: National Standards and Applicable Codes .....8

5.1 Gas Codes...................................................................8

5.2 Aircraft Hangars........................................................... 8

5.3 Parking Structures and Repair Garages...................... 8

5.4 Electrical ...................................................................... 8

5.5 Venting.........................................................................8

5.6 High Altitude ................................................................9

SECTION 6: Heater installation............................................ 10

6.1 General...................................................................... 10

6.2 Suspension................................................................ 10

SECTION 7: Venting.............................................................. 11

7.1 Venting ....................................................................... 11

7.2 Vent Installation .......................................................... 11

7.3 Unvented Operation ................................................... 12

7.4 Horizontal Venting ...................................................... 12

7.5 Vertical Venting...........................................................12

7.6 Length Requirements .................................................12

7.7 Vent Material...............................................................13

7.8 Replacing an Existing Heater in a Venting System..... 13

SECTION 8: Air Supply......................................................... 18

8.1 Separated Combustion Installation............................18

8.2 Unvented Installation ................................................. 18

8.3 Building Ventilation .................................................... 18

8.4 Outside Combustion Air Supply................................. 18

SECTION 9: Gas Piping........................................................ 19

9.1 Connections............................................................... 19

SECTION 10: Wiring ..............................................................21

10.1 Positioning Thermostats ..........................................21

10.2 Low Voltage Thermostat with One Heater ...............21

10.3 Low Voltage Thermostat with Multiple Heaters

(Models UHA[X][S]150 - 250) ....................................22

10.4 Low Voltage Thermostat with Multiple Heaters

(Models UHA[X][S]300 - 400)....................................23

10.5 UHA[X][S] Series Internal Wiring Diagram...............24

10.6 UHA[X][S] Series Ladder Wiring Diagram................ 25

10.7 Electrical Connection to the Heater..........................26

SECTION 11: Operation and Maintenance ..........................27

11.1 Pre-Start-Up Checks.................................................27

11.2 Begin Start-Up ..........................................................28

11.3 Complete the Start-Up ..............................................30

SECTION 12: User Instructions............................................31

12.1 Heater Operation......................................................31

12.2 Lighting Instructions .................................................31

12.3 Simple Troubleshooting............................................31

SECTION 13: Servicing.........................................................32

13.1 Servicing Instructions...............................................32

13.2 Burner Maintenance.................................................32

13.3 Fan/Motor Assembly Maintenance ...........................32

13.4 Heat Exchanger Maintenance..................................32

13.5 Gas Valve Maintenance ...........................................32

13.6 Flue Blower..............................................................32

13.7 Venting and Air Intake Pipe ......................................33

13.8 Maintenance Checklist .............................................33

SECTION 14: Troubleshooting .............................................35

14.1 General ....................................................................36

14.2 Troubleshooting For Automatic Ignition Burner

Systems...................................................................37

14.3 Troubleshooting for Flame Supervision System.......38

14.4 Troubleshooting for Gas Valves................................39

14.5 Troubleshooting for Flue Blower...............................39

SECTION 15: Replacement Parts .........................................40

15.1 Gas Valve .................................................................40

15.2 Burner Compartment ...............................................41

15.3 Ignition Electrode and Flame Pro

15.4 Heat Exchanger .......................................................43

15.5 Louvers and Louver Spring ......................................43

15.6 Flue Blower .............................................................44

15.7 Pressure Switch........................................................45

15.8 Ignition Control .........................................................45

15.9 Axial Fan/Guard/Motor Assembly.............................45

15.10 Limit Switches ........................................................46

SECTION 16: Specifications.................................................47

16.1 Dimension Data........................................................47

16.2 General Technical Data Table ..................................48

16.3 Technical Data Table ................................................48

SECTION 17: The ADDISON

UHA-Series Warranty...........49

be .........................42

Printed in U.S.A.

TABLE OF FIGURES

Figure 1: UHA[X][S]150 - 175 Label Placement........................2

Figure 2: UHA[X][S]200 - 250 Label Placement .......................3

Figure 3: UHA[X][S]300 - 400 Label Placement .......................4

Figure 4: Installation Clearances and Clearances to

Combustibles.............................................................7

Figure 5: Suspension Methods ............................................... 10

Figure 6: Vent and Roof Detail ................................................ 13

Figure 7: Standard Vented Heater - Vertical and Horizontal

Vent Termination ..................................................... 14

Figure 8: Standard Vented Heater - Common Vertical Vent

Termination.............................................................. 15

Figure 9: Separated Combustion Heater - Vertical and

Horizontal Vent Termination..................................... 16

Figure 10: Concentric Vent Box...............................................16

Figure 11: Concentric Vertical and Horizontal Vent

Termination - Separated Combustion Heater......... 17

Figure 12: Gas Connection .....................................................20

Figure 13: Automatic Burner Control Sequence...................... 28

Figure 14: Gas Valve for Models UHA[X][S] 150 - 400............ 29

Figure 15: LED Diagnostic Codes...........................................31

SECTION 1: HEATER SAFETY

Yo ur Safety is Important to Us! This symbol is used throughout the manual to notify you of possible fire, electrical or burn hazards. Please pay special attention when reading and following the warnings in these sections.

Installation, service and, at a minimum, annual inspection of heater must be done by a contractor qualified in the installation and service of gas-fired heating equipment. Read this manual carefully before installation, operation or service of this equipment. Heaters are not approved for residential installation. These instructions, the layout drawing, local codes and ordinances and applicable standards that apply to gas piping, electrical wiring, venting, etc. must be thoroughly understood before proceeding with the installation. Protective gear is to be worn during installation, operation and service. Thin sheet metal parts have sharp edges. To prevent injury, the use of work gloves is recommended. Before installation, check that the local distribution conditions, nature of gas and pressure and adjustment of the appliance are compatible. The heater must be applied and operated under the general concepts of resonable use and installed using the best building practices. This appliance is not intended for use by persons (including children) with reduced physical, 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 additional copies of the Installation, Operation and Service Manual, please contact Addison.

SECTION 1: HEATER SAFETY

1.3 California Proposition 65

In accordance with California Proposition 65 requirements, a warning label must be placed in a highly visible location on the outside of the equipment (i.e. near equipment's serial plate). See label placement drawing on Page 2, Figure 1 through Page 4, Figure 3 for label location. Avoid placing label on areas with extreme heat, cold, corrosive chemicals or other elements. To order additional labels, please contact Addison or your

ADDISON

independent distributor.

1. 1 M a np o w e r R e quirements

To prevent personal injury and damage to the heater, two persons will be required for installation.

1.2 Safety Labels and Their Placement

Product safety signs or lab

els should be replaced by the product user when they are no longer legible. Please contact Addison or your ADDISON independent distributor to obtain replacement signs or labels. See Page 2, Figure 1 through Page 4, Figure 3.

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UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

*For separated combustion units only.

Description Part Number

Logo Label 91031107 Cut Hazard Label 91010430 Vent Length Label 91039505 Vent to Outdoors Label 91010427 Warning Label 91010429 Rating Plate Label 91010441 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label* 91010426 Proposition 65 Label 91070015

Figure 1: UHA[X][S]150 - 175 Label Placement

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Figure 2: UHA[X][S]200 - 250 Label Placement

*For separated combustion units only.

Description Part Number

Logo Label 91031107 Cut Hazard Label 91010430 Vent Length Label 91039505 Ven t to Outdoors Label 91010427 Warning Label 91010429 Rating Plate Label 91010441 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label* 91010426 Proposition 65 Label 91070015

SECTION 1: HEATER SAFETY

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UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

*For separated combustion units only.

Description Part Number

Figure 3: UHA[X][S]300 - 400 Label Placement

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SECTION 2: INSTALLER RESPONSIBILITY

CAUTION

Product Damage Hazard

Do not use equipment in area containing corrosive chemicals.

Refer to appropriate Material Safety Data Sheets (MSDS).

Failure to follow these instructions can result in product damage.

The installer is responsible for the following:

• To install the heater, as well as the gas and electrical supplies, in accordance with applicable specifications and codes. Addison recommends the installer contact a Local Building Inspector or Fire Marshal for guidance.

• To use the information given in a layout drawing and in the manual together with the cited codes and regulations to perform the installation.

• To install the heater in accordance with the clearances to combustibles.

• To furnish all needed materials not furnished as standard equipment.

• To plan location of supports, vents and air intakes.

• To provide access for servicing.

• To provide the owner with a copy of this Installation, Operation and Service Manual.

• To never use heater as support for a ladder or other access equipment and never hang or suspend anything from heater.

• To ensure there is adequate air circulation around the heater and to supply air for combustion, ventilation and distribution in accordance with local codes.

• To ensure that the heater is placed in an approved application.

2.1 Wall Tag

A laminated wall tag is included with the heater as a permanent reminder of the safety instructions and the importance of the required clearances to combustibles. Affix the tag by peeling off the backing of the adhesive strips on the rear surface and position the tag on a wall near the heater.

A copy of the wall tag (P/N 91040097) is illustrated on the back cover.

Know your model number. Model number is found on the heater and throughout the Installation, Operation and Service Manual.

SECTION 1: HEATER SAFETY

2.2 Corrosive Chemicals

Addison cannot be responsible for ensuring that all appropriate safety measures are undertaken prior to installation; this is entirely the responsibility of the installer. It is essential that the contractor, the sub- contractor, or the owner identifies the presence of combustible materials, corrosive chemicals or halogenated hydrocarbons* anywhere in the premises.

* Halogenated Hydrocarbons are a family of chemical compounds characterized by the presence of halogen elements (fluorine, chlorine, bromine, etc.). These compounds are frequently used in refrigerants, cleaning agents, solvents, etc. If these compounds enter the air supply of the burner, the life span of the heater components will be greatly reduced. An outside air supply must be provided to the burners whenever the presence of these compounds is suspected. Warranty will be invalid if the heater is exposed to halogenated hydrocarbons.

2.3 National Standards and Applicable Codes

All appliances must be installed in accordance with the latest revision of the applicable standards and national codes. This refers also to the electric, gas and venting installation. Note: Additional standards for installations in public garages, aircraft hangars, etc. may be applicable.

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UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

SECTION 3: CRITICAL CONSIDERATIONS

3.1 Basic Information

UHA[X][S] heaters have automatic ignition burners for ON/OFF operation only.

3.4 Minimum Required Installation Clearances

Clearances around the heater and vent must be as indicated on Page 7, Figure 4 and Page 13, Figure 6 to ensure access for servicing and correct operation.

3.2 Manufactured Units

Gas-fired, power-vented unit heater with tubular heat exchanger. Units shall have a minimum of 82% thermal efficiency. The standard unit shall consist of a non-separated combustion design with an aluminized heat exchanger. Design and heat exchanger alternatives shall be offered as follows:

3.5 Ventilation

It is important to ensure that there is adequate air space around the heater to supply air for combustion, ventilation and distribution in accordance with local and national codes on Page 11, Section 7.

• Separated Combustion: A separated combustion

unit shall feature an enclosed, sealed burner box. A piece of flexible air duct connects this burner box to a flange on the cabinet.

Combustion air should be ducted from outside the heated space, with the ductwork connecting to the unit with the use of the flange.

3.6 Gas Supply

It is important that the gas supply pipe is sized correctly to provide the inlet pressure as stated on the heater data plate. The gas supply pipe and electrical connections must not support any of the heater's weight on Page 19, Section 9.

• Stainless Steel Heat Exchanger: A stainless steel heat exchanger unit shall consist of heat exchanger tubes, heat exchanger tube supports, heat exchanger tube plates and vent box produced of 409 stainless steel. The use of stainless steel heat exchanger unit is

3.7 Electrical Supply

A permanent 120 V / 60 Hz / 1 Ø electrical supply is required for the main electrical power. The heater also requires suitable controls in accordance with See Page 21, Section 10.

recommended when air inlet temperatures are below 40° F (4.4°C) or temperature rise is less than 40° F (22.2° C) as condensation may form on the heat exchanger resulting in corriosion that may shorten its life.

3.8 Vent

Choose heater orientation to allow for the proper location of the vent. Each heater must be fitted with a correctly sized sealed vent system.

If vented horizontally, no other appliance may be

3.3 Location and Suspension

connected to the vent.

All models:

•Must be installed indoors.

•Must be installed in a level position with horizontal discharge.

•May be mounted on a shelf of non-combustible material.

•May be suspended from above (See Page 10, Figure 5) or from wall brackets of sufficient strength to support the heater as listed in the Te c h ni c al Da ta Ta ble on Page 48, Section 16.2. Drop rods must be a minimum of 3/8" diameter mild steel. Four suspension points (3/8" nuts) are located on top of the heater.

•Must be installed in a manner which allows access to all serviceable components.

See Page 7

, Figure 4 for details.

See Page 11, Section 7.

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SECTION 4: CLEARANCES TO COMBUSTIBLES

WARNING

Fire Hazard

Keep all flammable objects, liquids and vapors the required clearances to combustibles away from heater.

Some objects can catch fire or explode when placed close to heater.

Failure to follow these instructions can result in death, injury or property damage.

(15 cm)

31"**

(79 cm)

(8 cm)

(15 cm)

Clearances to Combustibles

24" for adequate air flow access axial fan.

10'

(3 m)

Wall

Terminal

Roof Terminal

Top

20' (6.0 m) - 30' (9.1 m)

Max. Mounting Height*

Installation Clearances

(Optional separated

combustion concentric

venting shown.)

* Recommended mounting height varies with heater input. Heaters may be mounted at a higher level if destratification fans are installed.

Note: Venting directly from top of heater not applicable on Models 150 - 400.

Clearance to Vent: 2" (5 cm)

**31" (79 cm) minimum is necessary for servicing.

The heater must always be installed at least 6' (2 m) above the floor. The vent pipe must have clearance from combustibles by 2" (5 cm). If installed at low levels where individuals can come in contact with hot heat

exchanger components, adequate guarding must be provided.

4.1 Required Clearances To Combustibles

Check the clearances on the serial plate to make sure the product is suitable for your application and the clearances are maintained. Read and follow the safety guidelines below:

• Keep gasoline or other combustible material including flammable objects, liquids, dust or vapors away from this heater or any other appliance.

• The stated clearances to combustibles

represents a surface temperature of 90° F (50° C) above room temperature. Building materials with a low heat tolerance (such as plastics, vinyl siding, canvas, tri-ply, etc) may be subject to degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent materials are protected from degradation.

• Consult local Fire Marshal, Fire Insurance Carrier

Clearances are the required distances that combustible objects must be away from the heater to prevent serious fire hazards. Combustibles are materials that catch on fire and include common items such as wood, paper, rubber, fabric, etc. Maintain clearances to combustibles at all times for safety. Clearances for all heater models are located on the

or other authorities for approval of proposed installation when there is a possibility of exposure to combustible airborne materials or vapors.

4.2 Clearances To Combustibles

Clearances must be as indicated on Page 7, Figure

4. If clearances to combustibles are not indicated,

then installation clearances apply.

serial plate of the heater and throughout the manual.

Figure 4: Installation Clearances and Clearances to Combustibles

SECTION 4: CLEARANCES TO COMBUSTIBLES

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UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

SECTION 5: NATIONAL STANDARDS AND APPLICABLE CODES

5.1 Gas Codes

The type of gas appearing on the name plate must be the type of gas used. Installation must comply with national and local codes and requirements of the local gas company.

United States: Refer to NFPA 54/ANSI Z223.1 latest revision, National Fuel Gas Code.

Canada: Refer to CSA B149.1 Natural Gas and Propane Installation Code.

5.2 Aircraft Hangars

Installation in aircraft hangars must be in accordance with the following codes:

United States: Refer to Standard for Aircraft Hangars, NFPA 409 - latest revision.

Canada: Refer to Standard CSA B149.1 Natural Gas and Propane Installation Code.

• In aircraft storage and servicing areas, heaters shall be installed at least 10' (3 m) above the upper surface of wings or of engine enclosures of the highest aircraft which may be housed in the hangar. The measurement shall be made from the wing or engine enclosure (whichever is higher from the floor) to the bottom of the heater.

• In shops, offices and other sections of aircraft hangars communicating with aircraft storage or servicing areas, heaters shall be installed not less than 8' (2.4 m) above the floor.

• Suspended or elevated heaters shall be so located in all spaces of aircraft hangars that they shall not b

e subject to injury by aircraft, cranes, movable scaffolding or other objects. Provisions shall be made to assure accessibility to suspended heaters for recurrent maintenance purposes.

5.3 Parking Structures and Repair Garages

Installation in garages must be in accordance with the following codes:

United States: Standard for Parking Structures NFPA 88A - latest revision or the Code for Motor Fuel Dispensing Facilities and Repair Garages, NFPA 30A - latest revision. Canada: Refer to CSA B149.1 Natural Gas and Propane Installation Code.

• In accordance with the Standard for Parking Structures NFPA 88A, heaters must be located a minimum of 18" (50 cm) below the floor-ceiling assembly or 18" (50 cm) above the floor.

• In accordance with the Code for Motor Fuel Dispensing Facilities and Repair Garages, NFPA 30A - latest revision, heaters must not be installed less than 8' (2.4 m) above the floor.

5.4 Electrical

The heater must be electrically grounded in accordance with the following codes:

United States: Refer to National Electrical

Code

, NFPA 70 - latest revision. Wiring must

conform to the most current National Electrical

Code

, local ordinances and any special

diagrams furnished.

Canada: Refer to Canadian Electrical Code, CSA C22.1 Part 1 - latest revision.

5.5 Venting

The venting must be installed in accordance with the requirements within this manual and

the following codes:

United States: Refer to NFPA 54/ANSI Z223.1 latest revision, National Fuel Gas Code.

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Canada: Refer to CSA B149.1 Natural Gas and Propane Installation Code.

5.6 High Altitude

These heaters are approved (without modifications) for installations up to 2000' (610 m) in US and Canada. Heaters installed above 2000' (610 m) must be de-rated. For installations above 2000' (610 m) in US, consult factory for information on burner de-rating. For installations from 2000' (610 m) to 4500' (1370m) in Canada, high altitude conversion kits are available. Heaters installed over 4500' (1370 m) in Canada are not approved and must be approved by the local or provincial authority.

SECTION 5: NATIONAL STANDARDS AND APPLICABLE CODES

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UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

WARNING

Crush Hazard

Use 3/8" threaded rod minimum.

Failure to follow these instructions can result in death, injury or property damage.

SECTION 6: HEATER INSTALLATION

6.1 General

Heaters are designed for installation above 6' (1.8 m). These heaters must be installed within the heated space. Duct delivery systems are not permitted with axial fan units. When handling or supporting the heater from below, ensure that the weight is taken at the support points. The gas or electrical supply lines must not be used to support the heater. Do not locate the gas or electrical supply lines directly over the path of the flue products from the heater. The heater must be installed in a location that is readily accessible for servicing. The heater must be installed in accordance with clearances to combustibles as indicated on the wall tag and in this manual.

Figure 5: Suspension Methods

6.2 Suspension

Four suspension points (3/8" nuts) are located on the top of the heater. Drop rods must be 3/8" diameter mild steel minimum. When handling or supporting the heater from below ensure that the weight is taken at the support points. For typical suspension, See Page 10, Figure 5.

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SECTION 7: VENTING

WARNING

Carbon Monoxide Hazard

Heaters may be installed vented or unvented.

Vented heaters must be vented outdoors.

Unvented heaters must be installed according to the installation manual.

Failure to follow these instructions can result in death or injury.

7. 1 Ve n t i n g

This heater must be vented in accordance with the rules contained in this manual and with the following national codes and any state, provincial or local codes which may apply: United States: Refer to NFPA 54/ANSI Z223.1 - latest revision, National Fuel Gas Code; Canada: Refer to CSA B149.1 Natural Gas and Propane Installation Code. Any portion of vent pipe passing through a combustible wall must have a listed thimble to conform with the above codes.

The heater may be installed unvented in certain circumstances according to building ventilation codes. Refer to the above codes and Page 12, Section 7.3 for further information. Unvented operation also requires compliance with the clearances to combustibles given on Page 7, Figure 4.

The bottom of the vent or air intake terminal shall not be located less than 1' (.3 m) above grade level.

The vent shall not terminate less than 7' (2.1 m) above grade where located adjacent to pub walkways.

Vent terminal must be installed at a height sufficient to prevent blockage by snow and building materials protected from degradation by flue gasses.

Vent terminal must be beyond any combustible overhang.

Secure all joints with corrosion resistant #8 x 3/8" sheet metal screws.

For single wall venting, pressure sensitive aluminum tape or silicone sealant must be used to seal all joints.

Aluminum tape shall have a minimum temperature rating of 400° F (204° C) and meet SMACNA AFTS-

lic

SECTION 7: VENTING

100-73 standards. High temperature silicone sealant must have a minimum temperature rating of 480° F (250° C).

7.1.1 United States Requirements

Vent must terminate at least 3' (.9 m) above any forced air inlet located within 10' (3.1 m).

Vent must terminate at least 4' (1.2 m) below, 4' (1.2 m) horizontally from, or 1' (.3 m) above any door, operable window, or gravity air inlet into any building.

NFPA 54/ANSI Z223.1 - latest revision, National Fuel Gas Code specifies a 4' (1.2 m) horizontal vent terminal clearance from gas and electric meters, regulators and relief equipment.

7.1.2 Canadian Requirements

The vent shall not terminate within 6' (1.8 m) of a mechanical air supply inlet to any building.

The vent shall not terminate within 3' (.9 m) of a window or door that can be opened in any building, any non-mechanical air supply inlet to any building, or of the combustion air inlet of any other appliance.

7.2 Vent Installation

Maintain clearances to combustibles at all times for safety. Clearances are the required distances that combustible objects must be away from the heater to prevent serious fire hazard. See Page 7, Figure 4. For vented units, the vent must terminate outside of the building.

Vents must be fully sealed and correctly sized for the model. If the vent passes through a ceiling of combustible material, it must be enclosed by a listed thimble and be separated from the thimble by at least a 2" (5 cm) air gap.

For separated combustion models, vents and air intakes must be a fully sealed system and correctly sized for the model. Vent should be assembled as detailed on Page 13, Figure 6 through Page 17, Figure 11. The joints between the vent terminal and the roof or wall must be properly sealed. If the vent passes through a wall or ceiling of combustible material, it must be enclosed by a listed thimble and be separated from the thimble by at least a 2" (5 cm) air gap.

Vents and air intakes must be adequately supported so that the heater does not bear the weight of the pipes.

For vent termination See Page 13, Figure 6 through Page 17, Figure 11.

wall or

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UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

WARNING

Carbon Monoxide Hazard

Heaters may be installed vented or unvented.

Vented heaters must be vented outdoors.

Unvented heaters must be installed according to the installation manual.

Failure to follow these instructions can result in death or injury.

7.2.1 Standard Vented Heaters (Models UHA[X] 150 - 400)

The vent must be fitted with a low resistance terminal. See Page 13, Figure 6 through Page 14, Figure 7. Standard vented heaters do not allow outdoor air intake for combustion air.

7.2.2 Separated Combustion Heaters (Models UHA[X]S 150 - 400)

The heaters are designed to be installed as separated combustion heaters. The vent and air intake are run as separate pipes to the wall or roof terminals. See Page 16, Figure 9. As an option, the vent and air intake are run as separate pipes to a concentric vent box and a concentric vent/air intake pipe penetrates the wall or roof. See Page 16, Figure 10 and Page 17, Figure 11.

For separated combustion installation, the vent and air intake must be fitted with an individual and correctly sized sealed system and the vent and air intake must terminate at approved wall and roof terminals. Separated combustion units may not be common vented. See Page 11, Section 7.

7.3 Unvented Operation

condensation will form. Insulation is recommended and condensation drains may be desired. For vents pitched up toward the vent terminal, place the condensation drain within 5' (1.5 m) of the heater.

In noncombustible walls only, vent terminal (P/N 02537801-1P) may be used.

For 4'' (10 cm) vents in either combustible or noncombustible walls, use vent terminal (P/N

90502100) or equivalent insulated vent terminal. Follow the manufacturer's instructions for proper installation.

Instead of an insulated vent terminal, a listed thimble with 2" (5 cm) air gap, may be used with a 4" (10 cm) vent cap (P/N 90502102).

7.5 Vertical Venting

Vertically-vented standard-vented heaters can be common vented ( For vent lengths greater than 5' (1.5 m), condensation will form. Insulation is recommended and condensation drains may be desired. Vent from the rear of the heater cabinet then run the vent vertically and use a condensate drain at the bottom of the vertical vent. Vent pipe must be sloped 1/4'' (.6 cm) for every 1' (.3 m).

For 4'' (10 cm), an approved vent cap (P/N 90502102) must be used.

For 6'' (15 cm) common vent, an approved vent cap (P/N 90502103) must be used.

For common vertical venting of more than two heaters, See Page 15, Figure 8.

A vent shall not extend less than 2' (.6m) above the highest point where it passes through a flat roof of a

building.

up to 4 heaters).

This heater is not approved to be installed in residential buildings. For unvented operation in commercial installations, sufficient ventilation must be provided in the amo of 4 cfm per 1000 Btu/h firing rate (United States); 3 cfm per 1000 Btu/h firing rate (Canada).

7.4 Horizontal Venting

Horizontally vented heaters must be individually vented. Vent pipe must be sloped ¼" (.6 cm) for every 1' (.3 m). For vent lengths greater than 5' (1.5 m),

12 of 49

7. 6 L e n gth Requirements

If using vent lengths greater than 5' (1.5 m), condensation will form in the vent pipe. Insulation and additional sealing measures (high temperature silicone at all seams) are required. The entire vent should be insulated with foil faced fiberglass insulation (1/2" thick, 1-1/2# density minimum).

unt

Maximum Vent Lengths Table

Model UHA[X][S]

150 - 400

40 ft (12.2 m) 1 35 ft (10.7 m) 2

30 ft (9.1 m) 3 25 ft (7.6 m) 4 20 ft (6.1 m) 5

# of Elbows

7.7 Vent Material

Vent material may be single wall 26 ga. (minimum) galvanized steel or equal thickness stainless steel. Completely seal all joints, refer to Page 11, Section

7.2. If penetrating a combustible wall or roof, a listed thimble with 2" (5 cm) clearance must be used. Where local codes permit, a single section of type B-1 vent material may be used at the roof or wall penetration instead of a thimble. Ensure vent manufacturer's clearance from vent material is maintained. Seal annular space of the type B-1 vent as well as all joints in the remaining vent.

7. 8 Replacing an Existing Heater in a Venting System

When replacing an existing heater in a venting system, the venting system may not be properly sized to vent the new heater. The following steps must be followed with each appliance connected to the venting system placed in operation, while any other appliances connected to the venting system are not in operation.

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal pitch, as required by the NFPA 54/ ANSI Z223.1 - latest revision, National Fuel Gas Code (US) or Standard CSA B149.1 Natural Gas and Propane Installation Code (Canada) and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.

3. Close all building doors and windows and all doors between the space in which the appliance(s) connected to the venting system are located and other spaces of the building. Turn on clothes dryers and any exhaust fans, such as range hoods and bathroom exhausts so that they shall operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.

4. Follow the lighting instructions. Place the appliance being inspected in operation. Adjust

SECTION 7: VENTING

thermostat so that the appliance will operate continuously.

5. For any appliance having a draft hood, test for draft hood appliance spillage at the draft hood relief opening after five minutes of main burner operation. Use the flame of a match or candle.

6. After it has been determined that each appliance connected to the venting system properly vents when tested as o

utlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-burning appliances to their previous conditions of use.

7. If improper venting is observed during any of the above tests, the venting system must be corrected by a contractor qualified in the installation and service of gas-fired equipment or your local gas supplier. If the venting must be resized, use appropriate tables in (US) Appendix G of NFPA 54/ANSI Z223.1 - latest revision, National Fuel Gas Code (US) or Standard CSA B149.1 Natural Gas and Propane Installation Code (Canada) to determine minimum size. All vent corrections must be in accordance with the appropriate local codes and the NFPA 54/ANSI Z223.1 latest revision, National Fuel Gas Code (US) or Standard CSA B149.1 Natural Gas and Propane Installation Code (Canada).

Figure 6: Vent and Roof Detail

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UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Vent Terminal

4" (10cm) Diameter Vent

Flashing (By Others)

Listed Thimble (2" [5cm] Clearance)

Vent Terminal

Vertical

Option

Horizontal

Option

Vent

Listed

Thimble

(2" [5cm] Clearance)

Flashing (By Others)

12" (31 cm) Minimum

NOTE: Vent supports not shown.

90° Bend

Model Vent Diameter Part Number

UHA[X] 150 - 400 4" (10 cm) 90502102

Figure 7: Standard Vented Heater - Vertical and Horizontal Vent Termination

14 of 49

Figure 8: Standard Vented Heater - Common Vertical Vent Termination

SECTION 7: VENTING

Requirements:

•Maximum of four heaters can be commonly vented through the roof.

• Heaters must be of the same BTU output.

• Heaters must be controlled by a common thermostat.

• Connections to a common stack must be positioned to avoid direct opposition between streams of combustion gases.

15 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Model **Vent Diameter Part Number

UHA[X]S 150 - 400 4" (10 cm) 90502102

Model *Air Intake Diameter Part Number

UHA[X]S 150 - 250 4" (10 cm) 90502102 UHA[X]S 300 - 400 5" (13 cm) 90502105

4" (10 cm) Single Wall Vent Pipe (By Others)

Seal joint between single wall and Type B vent with silicone sealant.

Use 3 sheetmetal screws equally spaced around joint.

Use 3 sheetmetal screws equally spaced around collar.

Concentric Vent Box

6" (15 cm) or 8" (20 cm) Single Wall Inlet Air Pipe (By Others)

One piece of 4" (10 cm) diameter, 1/4" (6 cm)airspace type

“B” vent. Selkirk Model RV or equivalent. (By others)

Combustion Air to Heater

Toward Outside

Exhaust from Heater

4" (10 cm) or 5" (13 cm)

Figure 9: Separated Combustion Heater - Vertical and Horizontal Vent Termination

Minimum from air inlet to vent

12" (31 cm)

termination.

Air Intake*

Vertical

Option

90° Bend

Vent**

Horizontal

Air Intake

12" (31 cm) Minimum from roof to vent termination.

12" (31 cm)

Option

Minimum from air inlet to vent termination.

Air Intake Termination

Vent Termination

Figure 10: Concentric Vent Box

Vent**

12" (31 cm) Minimum from wall to vent termination.

Listed Thimble through

Combustible Wall

NOTE: Vent supports not shown

16 of 49

SECTION 7: VENTING

Description Part Number Qty. Concentric Vent Kit (150 - 250) UHVK1

Concentric Vent Box Top & Side Assembly 90504113 1 Concentric Vent Box Bottom Assembly 90504112 1 Screw #6 x 3/8 Self Drilling 91119100 14 4" Vent Terminal with Baffle Plate 90502102R 1 6" Combustion Air Terminal 90502103 1

Description Part Number Qty. Concentric Vent Kit (300 - 400) UHVK2

Concentric Vent Box Top & Side Assembly 90504013 1 Concentric Vent Box Bottom Assembly 90504012 1 Screw #6 x 3/8 Self Drilling 91119100 14 4" Vent Terminal with Baffle Plate 90502102R 1 8" Combustion Air Terminal 90502104 1

Model **Vent Diameter

UHA[X]S 150 - 400 4" (10 cm)

Model *Air Intake Diameter

UHA[X]S 150 - 250 4" (10 cm) UHA[X]S 300 - 400 5" (13 cm)

Figure 11: Concentric Vertical and Horizontal Vent Termination - Separated Combustion Heater

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UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

WARNING

Explosion Hazard

Equipment must have access to uncontaminated air at all times.

Failure to follow these instructions can result in death, injury or property damage.

SECTION 8: AIR SUPPLY

8.1 Separated Combustion Installation

When installed as a separated combustion heater (UHA[X]S), the air for combustion is drawn in from outside the building. It is important to ensure that there is adequate space around heater to provide air for the axial air distribution fan.

8.2 Unvented Installation

It is important to ensure that there is adequate fresh air supply at all times for both combustion and heating requirements in accordance with local and national codes.

8.3 Building Ventilation

Where ventilation is required, air must be taken from an outside point where it is not likely to be contaminated or obstructed.

8.4 Outside Combustion Air Supply

If outside combustion air supply is required, separated combustion model (UHA[X]S) heaters must be used.

Caution: If the building has a slight negative pressure or corrosive contaminants su halogenated hydrocarbons are present in the air, an outside combustion air supply to the heater is required. Seal all combustion air pipe joints. The flexible air duct may have to be insulated to prevent condensation on the outer surface. The outside air terminal must not be more than 1' (31 cm) above the vent terminal.

ch as

8.4.1 Length Requirements

Follow the constraints listed on Page 12, Section 7.6.

18 of 49

SECTION 9: GAS PIPING

WARNING

Explosion Hazard

Leak test all components of gas piping before operation.

Gas can leak if piping is not installed properly.

Do not high pressure test gas piping with heater connected.

Failure to follow these instructions can result in death, injury or property damage.

A gas meter is connected to the service pipe by the gas supply company. An existing meter should be checked, preferably by the company, to ensure that the meter is adequate for the rate of gas supply required.

Installation pipes must be fitted in accordance with local and national codes. Pipes of smaller size than the heater inlet gas connection should not be used.

Gas lines must meet applicable codes: United States: Flexible stainless steel gas hose

(US models) is certified per the standard for connectors for gas appliances, ANSI Z21.21/CSA

6.10 - latest revision.

SECTION 9: GAS PIPING

Canada: Rubber type 1 gas hose (Canadian

models) is certified as being in compliance with the standard for elastomeric composite hose and hose couplings for conducting propane and natural gas, CAN/CGA 8.1 - latest revision.

9.1 Connections

Connect the heater to the gas supply ensuring that the final connections are as follows:

•Gas supply pipe work is run in medium or heavy gauge tubing in compliance with local and national codes.

• Meter and service must be large eno handle all the burners being installed plus any other connected load. The gas pipe which feeds the system must be large enough to supply the required gas with a maximum pressure drop of 1/2" wc. When gas piping is not included in the layout drawing, contact the local gas supplier.

• An isolating valve and union connection should be used and fitted into the supply adjacent to the heater.

•A minimum 1/8" NPT plugged tapping accessible for test connection must be installed immediately upstream of the gas supply connection to the heater.

•For suspended heaters, an approved metal flexible connection between the isolating valve and the heater may be used. To reduce

pressure loss, use one pipe size larger than the heater gas connection.

IMPORTANT - The complete installation must be

urged and tested for gas soundness in accordance

with local and national codes.

Caution: Do not high pressure (in excess of 1/2 psi [14" wc]) test the gas piping with the burner connected. Close manual shut-off valve during any pressure testing equal to less than 1/2 psi (14" wc).

Check the pipe and tubing ends for leaks before placing heating equipment into service. When checking for gas leaks, use a soap and water solution; never use an open flame.

ugh to

19 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Figure 12: Gas Connection

20 of 49

SECTION 10: WIRING

DANGER

Electrical Shock Hazard

Disconnect electric before service.

More than one disconnect switch may be required to disconnect electric from equipment.

Equipment must be properly grounded.

Failure to follow these instructions can result in death or electrical shock.

SECTION 10: WIRING

Heater must be wired and electrically grounded in accordance with local codes. In the absence of local

codes in accordance with: United States: refer to National Electrical Code

NFPA 70 - latest revision Canada: refer to Canadian Electrical Code CSA C22.1 Part I - latest revision.

10.1 Positioning Thermostats

A room thermostat should be mounted on a vibration-free wall or column at a height of approximately 5' (1.5 m) from the floor to measure the ambient temperature. It should be clear of both cold drafts and the direct path of warm air from the heater. Avoid mounting thermostat on outside walls or in areas directly exposed to radiant heat or sunlight. Install wall tag in a visible location near thermostat. See Page 5, Section 2.1 for wall tag details.

All heater models require constant 120 V / 1Ø / 60 Hz power supply. Check heater rating plate for electrical rating for proper circuit sizing. For servicing, a disconnect switch of proper electrical rating should be installed in the vicinity of the heater.

All heaters are equipped with thermostat connections suitable to power a 24 V thermostat.

10.2 Low Voltage Thermostat with One Heater

24 Volt Thermostat Heating Only

Electrical

Supply

10.1.1 Fan Control

The heater’s axial fan can be used during the offseason for air circulation. A low voltage programmable thermostat with fan switch (P/N

90425400) must be used. See Page 21, Section

10. 2 for thermostat connection details. For the use of multiple heaters on one thermostat, See Page 22, Section 10.3 through Page 23, Section 10.4.

Terminal

Strip

G W C

Gas Supply

24 Volt Thermostat with Fan Control

Electrical

Supply

Terminal

Strip

R G W C

Gas Supply

21 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Model Relay Type Relay Part Number Max. Number of Heaters

UHA[X][S]150 - 250 DPST 90436300 4

10.3 Low Voltage Thermostat with Multiple Heaters (Models UHA[X][S]150 - 250)

22 of 49

10.4 Low Voltage Thermostat with Multiple Heaters (Models UHA[X][S]300 - 400)

Model Relay Type Relay Part Number Max. Number of Heaters

UHA[X][S]300 - 400 DPST 90436300 2

SECTION 10: WIRING

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UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Blue

Black

Orange

Yellow

Brown

Black

White

Black

Green

White

Green

Blue

Black

White

Green

Blue

Green

24 VAC

HOT

GROUND

Flame

Black

SENSE

ELECTRODE

LIMIT

SWITCH

PRESSURE

SWITCH

AXIAL FAN

GAS VALVE

IGNITION MODULE

TRANSFORMER

AXIAL FAN (UHA 300, 350, 400) ONLY)

LIMIT SWITCH (UHA 300,350, 400 ONLY)

MANUAL RESET LIMIT SWITCH

(UHA 30 - 125 ONLY)

THERMOSTAT INPUT: FIELD SUPPLIED

R = 24 VAC TO THERMOSTAT (RED) G = MANUAL FAN INPUT FROM THERMOSTAT (GREEN) W = HEAT DEMAND INPUT FROM THERMOSTAT (WHITE) C = COMMON SIDE OF TRANSFORMER

FLUE

BLOWER

R G W C

ACC

CMB Blower

Yellow

Orange

NOTE:

For field wiring into service junction box, or if any of the original wire supplied with the heater must be replaced, it must be replaced with wiring material having a temperature rating of at least 105° C (221° F) and 600 volts. For supply connections use No. 14 AWG or larger wires.

10.5 UHA[X][S] Series Internal Wiring Diagram

24 of 49

10.6 UHA[X][S] Series Ladder Wiring Diagram

FLAME

SENSOR

PRESSURE SWITCH

THERMOSTAT CONNECTION

120 VAC

TRANSFORMER

FLUE BLOWER

AXIAL FAN

UHA (300, 350, 400 Only)

GAS

VALVE

ELECTRODE

IGNITION MODULE

Flame

Spark

Limit Switch

Limit Switch (UHA 300, 350, 400 Only)

Manual Reset Limit Switch (UHA 30 - 125 Only)

NOTE:

SECTION 10: WIRING

25 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

BX Connector

Junction Box

Flexible Conduit

Burner

Connect wires together

with suitable approved

wire connectors.

Green to Ground

White to L2

Black to L1

L1 L2

Ground

Black

White

Green

10.7 Electrical Connection to the Heater

Note: Junction box is not provided with heater.

Conduit can also be attached directly to heater with wire junction made within the heater cabinet.

26 of 49

SECTION 11: OPERATION AND MAINTENANCE

WARNING

Severe Injury Hazard

Turn off gas and electrical supply before service.

Fan can start automatically at any time.

Failure to follow these instructions can result in severe injury or product damage.

SECTION 11: OPERATION AND MAINTENANCE

DANGER

Electrical Shock Hazard

Disconnect electric before service.

Heater must be connected to a properly grounded electrical source.

Failure to follow these instructions can result in death, electric shock, injury or property damage.

Read this manual carefully before installation, operation, or service of this equipment. All components are accessed via hinged door secured by tooled access. Opening the door exposes live electrical connections and hot components.

Explosion Hazard

Turn off gas supply to heater before service.

WARNING

Burn Hazard

Allow heater to cool before service.

Tubing may still be hot after operation.

11.1.2 Electrical Checks

All pre-start-up checks must be carried out before start-up the heater.

1. Check that all site wiring is connected in accordance with the appropriate wiring diagram on Page 24, Section 10.5.

Cut/Pinch Hazard

Wear protective gear during installation, operation and service.

Edges are sharp.

11.1 Pre-Start-Up Checks

All pre-start-up checks must be carried out before lighting the heater.

Ensure that the heater and all controls are suitable for the gas, pressure and electrical supply to which they are to be connected.

11.1.3 Gas Supply

All aspects of the gas installation including the gas meter must be inspected, tested for gas tightness and purged in accordance w codes.

Ensure that the air is fully purged from the heater inlet pipe up to the main gas valve inlet test nipple.

11.1.4 Mechanical Checks

1. Check that the fan is free to run and delivery louvers are turned to give required

air deflection.

2. Check that the flue (and air intake for separated combustion units) is installed in accordance with the instructions in this manual and local regulations. See Page 11, Section 7.

ith local and national

11.1.1 Louvers

Where fitted, the air delivery louvers need to be set during start-up to give the required air distribution.

27 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Burner Sequence for Ignition Control

Flame Signal

Start Gas Valve

Ignition Spark

Thermostat 24 V

SHUT DOWN

RUN

START

ts = 10 Seconds

Signals Output By Control

Required Incoming Signals

Flue Blower

Pressure

Switch

30 Seconds Purge*

*Purge time begins at pressure switch change over.

Axial Fan

30 Seconds Delay 90 Seconds Delay

30 Seconds Post Purge

If at any stage the flame fails, the control will retry for ignition. The control has four trials for ignition before a one hour lockout.

11.2 Begin Start-Up

11.2.1 Before Operating the Heater

To e n sure that all the controls are in safe working order, operate the heater for the first time with the isolating gas valve turned off and power supply turned on.

1. Turn off the isolating gas valve.

2. Turn up the thermostat above room temperature. The automatic ignition sequence will now begin as described on Page 28, Figure 13.

There will be no ignition of the burner and lockout will occur, which proves the controls are operating correctly.

Figure 13: Automatic Burner Control Sequence

28 of 49

Figure 14: Gas Valve for Models UHA[X][S] 150 - 400

½PSI IN

OFF

Regulator

Outlet Pressure

Gas Inlet

Inlet Pressure

TOP VIEW

END VIEW

Description Part Number

Gas Valve 150 - 250 NG 90032505 Gas Valve 150 - 250 LP 90032506 Gas Valve 300 - 400 NG 90032520 Gas Valve 300 - 400 LP 90032521

SECTION 11: OPERATION AND MAINTENANCE

11.2.2 Start-Up the Gas Valve (All Gases)

11.2.2.1 Check Burner Gas Pressure

1. Re m ov e t h e p lug in the outlet (burner) pressure test point and connect a pressure tap and a manometer.

2. With the burner firing, measure the pressure on the manometer. To adjust the burner pressure, remove the regulator cover from the valve and turn the regulator adjustment screw to set the required burner pressure as stated in the Te c h ni c al Da ta Ta ble for the correct gas and model on Page 48, Section 16.3.

NOTE: If the correct burner pressure cannot be reached, then check the inlet pressure to the valve

with the burner firing. See Technical Data Table on Page 48, Section 16.3 for inlet pressure

requirement.

Do not continue to adjust the regulator if the pressure is not changing.

If the inlet pressure is too low to allow correct burner press

ure setting, then the gas inlet pressure must be

corrected before completing the start-up.

Check Gas Rate

1. A f t e r burner pressure adjustment, allow the heater to operate for at least 15 minutes and then re-check settings. Adjust pressure setting if necessary.

2. Check gas flow rate at gas meter.

3. Turn off heater and electrical supply.

4. Remove the manometer and refit all covers to the valve and tighten the screw of the outlet pressure tap.

11.2.3 Pressure Switch

The pressure switch is factory pre-set for each model and is not adjustable.

11.2.4 Turning Off the Heater

Set the thermostat to the "OFF" position or lowest setting and the main burner will stop.

The fan will continue to run until it is stopped automatically by the fan thermostat.

Do not use a disconnect switch for control of heater. Disconnect switch will turn off the fan. Heat exchanger could be damaged. Warranty will not cover damage to the heat exchanger if operated improperly. Only use the disconnect switch for turning off heater for service or durin off-season.

29 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

11.2.5 External Controls

External controls may include time switch, interlock switch, room thermostat and frost thermostat. Operate each control to ensure that they function correctly. Set the switches (if fitted) and thermostat(s) to the users’ requirements.

11.3 Complete the Start-Up

Ensure that all covers are fitted correctly and all test points are properly sealed.

11.3.1 Instruction to the User

Explain the controls of the heater to the user including how to turn it on and off, using the controls fitted on site.

Give this manual to the user. Ensure that the user is shown and understands the

importance of maintaining clearances to combustibles on Page 7, Figure 4, installer responsibility on Page 6, Section 3 and user instructions on Page 31, Section 12 and all warnings defined in this manual.

30 of 49

SECTION 12: USER INSTRUCTIONS

Cut/Pinch Hazard

Wear protective gear during installation, operation and service.

Edges are sharp.

WARNING

Failure to follow these instructions can result in death, electric shock, injury or property damage.

Burn Hazard

Allow heater to cool before service.

Tubing may still be hot after operation.

Explosion Hazard

Turn off gas supply to heater before service.

DANGER

Electrical Shock Hazard

Disconnect electric before service.

Heater must be connected to a properly grounded electrical source.

SECTION 12: USER INSTRUCTIONS

The UHA[X][S] Series heaters are fully automatic and operate from the external controls fitted on site.

12.1 Heater Operation

When the heater has been switched on by the thermostat installed on site, the main burner will automatically turn on.

The burner control box will control the safe ignition of the flame.

All heaters require a constant gas and electricity supply which must not be interrupted during the normal operation of this heater.

12.2 Lighting Instructions

12.2.1 To Turn On Heater

1. E n s ure that the electrical and gas supplies to the heater are on. Check that the on site controls are "ON".

IMPORTANT: The thermostat setting must be above the ambient temperature for the heater to operate.

2. The automatic firing sequence will begin as described on Page 28, Figure 13. The heater will now operate automatically under the control

3. The time and/or temperature controls are not "ON".

4. A limit switch may have operated. This may be caused by an interruption of the electrical supply, failure of the distribution fan or vent or heat exchanger blockage.

If a temperature limit switch persistently trips, there is a fault which must be investigated by a contractor qualified in the installation and service of gas-fired heating equipment.

12.3.1 Simple Troubleshooting (Burner Fault)

If the burner fails to ignite for any reason, it will retry for ignition (four trials total). After four unsuccessful ignition trials, the control will put the heater into lockout for one hour.

Lockout should not occur during normal operation of the heater and indicates there is a fault condition which must be corrected. There is an LED light on the ignition control that flashes codes to assist in fault correction. See Page 31, Figure 15 for LED indication codes.

of the on site controls.

12.2.2 To Turn the Heater Off

Set the thermostat to the "OFF" position. The burner will turn off immediately. The fan will continue to run for 90 seconds. To restart, turn the thermostat above room

temperature.

12.3 Simple Troubleshooting

Some possible reasons for the heater not operating are:

1. Ga s s upply not "ON".

2. Electricity supply not "ON".

Figure 15: LED Diagnostic Codes

LED INDICATION FAULT MODE

Slow Flash Normal Operation - No call for heat.

Fast Flash Normal Operation - Call for heat.

2 Flashes Ignition Lockout - No flame detected.

3 Flashes Airflow Fault - Pressure switch open or closed.

4 Flashes Temperature Limit Switch Open

5 Flashes Flame Sense Error - Gas valve not energized.

Steady On Internal Control Failure

31 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Cut/Pinch Hazard

Wear protective gear during installation, operation and service.

Edges are sharp.

WARNING

Failure to follow these instructions can result in death, electric shock, injury or property damage.

Burn Hazard

Allow heater to cool before service.

Tubing may still be hot after operation.

Explosion Hazard

Turn off gas supply to heater before service.

DANGER

Electrical Shock Hazard

Disconnect electric before service.

Heater must be connected to a properly grounded electrical source.

SECTION 13: SERVICING

13.1 Servicing Instructions

After start-up, the heater will require maintenance to be carried out, at a minimum, annually. If the heater

is used in a dirty or dusty area, more frequent maintenance may be required.

IMPORTANT: After any maintenance or repair work, always test fire the heater in accordance with the start-up instructions on Page 27, Section 11 through Page 30, Section 11.3.1 to ensure all safety systems are in working order before leaving the heater to operate. Minor faults may be traced by using the troubleshooting charts on Page 35, Section 14 through Page 39, Section 14.5.

IMPORTANT: Check all gas pipes and pipe joints to ensure there are no cracks or gas leaks. Any cracks in the pipes or pipe joints must be repaired.

IMPORTANT: Inspect all suspended components and hardware. Ensure that they are in good condition, properly tightened, and corrosion free.

13.2 Burner Maintenance

1. Open the door and remove the burner compartment cover. See Page 41, Section 15.2

2. Clean any deposits from the main burner which may have formed in the injectors or venturi of

the burner. See Page 41, Section 15.2.

3. Remove the ignition electrode and flame probe. Check condition of ignition electrode and flame probe. Clean off any deposits which may have been formed, check condition of ceramic

32 of 49

insulators. Replace as necessary. See Page 42, Section 15.3.

13.3 Fan/Motor Assembly Maintenance

The main fan bearings are permanently sealed and do not need lubrication. Before cleaning, turn off gas and electrical supply. Remove the fan and use a small brush or duster to clean the fan blades from each side. Replace fan when done.

13.4 Heat Exchanger Maintenance

The heat exchanger will remain clean unless a problem has developed with combustion. Inspect the heat exchanger. Look for signs of overheating at the front tubes which may indicate burner over firing or persistently low air flows.

13.5 Gas Valve Maintenance

No regular maintenance is required on this device. To change gas control valves, See Page 40, Section

15.1.

Do not repair or disassemble gas valve.

Replace faulty gas valves parts sold and supplied by Addison.

13.6 Flue Blower

The flue blower should not require maintenance. However, if the air pressure switch is causing burner lockout, then remove the flue blower from the vent box by unscrewing the three screws at the mounting plate. Remove the four screws attaching the mounting plate to the fan inlet (See Page 44, Section 15.6). Ensure that the fan is free to run and that the fan wheel is clean.

with genuine replacement

SECTION 13: SERVICING

13.7 Venting and Air Intake Pipe

Inspect all venting and air intake pipe. Ensure that all seams are sealed and suspension points secure. Repair suspension points if any part of the venting or combustion air pipe is sagging. Check to make sure any insulation is not missing or in poor condition. Replace as necessary. Check all venting and air intake components to ensure they are in good condition, gas tight and corrosion-free.

must be performed by a contractor qualified in the installation and service equipment sold and supplied by Addison and conform to all requirements set forth

in the ADDISON

manuals and all applicable governmental authorities pertaining to the installation, service, operation and labeling of the equipment.

To help facilitate optimum performance and safety, Addison recommends that a qualified contractor conduct, at a minimum, annual inspections of your

13.8 Maintenance Checklist Installation Code and Annual Inspections: All

installations and service of ADDISON

equipment

ADDISON necessary, using only replacement parts sold and supplied by Addison.

equipment and perform service where

Annual Fall Start-Up Follow entire start-up procedure at this time and check control settings and

operation.

The Vicinity of the Heater Do not store or use flammable objects, liquids or vapors near the heater.

Immediately remove these items if they are present.

See Page 6, Section 3.

Vehicles and Other Objects

Maintain the clearances to combustibles.

Do not hang anything from, or place anything on, the heater.

Make sure nothing is lodged in between the heat exchanger or in the louvers.

Immediately remove objects in violation of the clearances to combustibles.

See Page 7, Section 4.

Vent Pipe/Terminals Venting must be intact. Using a flashlight, look for obstructions, cracks on the

pipe, gaps in the sealed areas or corrosion.

The area must be free of dirt and dust.

Remove any carbon deposits or scale using a wire brush.

If the vent terminal has a screen built in, remove any dirt, dust or deposits from the screen.

See Page 18, Section 8.

Cabinet Exterior After installation, tou

ch up scratches. Periodic paintings should be done

thereafter as required. Warning labels and logo labels should be legible and

accurate. Please contact Addison or ADDISON

independent distributor if you need replacement warning labels or logo labels See Page 2, Figure 1 through Page 4, Figure 3.

Combustion Air Intake Pipe

Intake pipe and inlet must be intact. Look for obstructions, cracks on the pipe, gaps in the sealed areas or corrosion.

The area must be free of dirt and dust.

Clean and reinstall as required.

See Page 18, Section 8.

33 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Heat Exchanger Make sure there are no cracks.

See Page 19, Section 9.

Make sure there is no sagging, bending or distortion.

Clean or replace as required.

Gas Line and Shut-off

Check for gas leaks. See Page 19, Section 9.

Valves Burner Observation

Window

Flue Blower Scroll, Wheel

Make sure it is clean and free of cracks or holes.

Clean and replace as required.

Compressed air or a vacuum cleaner may be used to clean dust and dirt.

and Motor Inshot Burners and

Orifices

Clear of obstructions (even spider webs will cause problems).

Carefully remove any dust and debris from the burner.

Direct-Spark Igniter Replace if there are cracked ceramics, excessive carbon residue, or erosion

of the electrode.

The electrode gap should be 1/8" (3.2 mm).

Thermostat There should be no exposed wire or damage to the device or wiring.

See Page 21, Section 10.

Suspension Points Make sure the heater is hanging securely.

Look for signs of w

ear on the suspension materials or ceiling.

See Page 10, Figure 5.

Silicone Tubing Ensure tight, secure fit on all pressure fittings at pressure switch,

burner partition, and blower outlet.

Gas Valve Verify that cap covering pressure regulator adjustment screw is secure and

has not been tampered with.

Verify all wiring connections.

Condensate Drain

Flush drain and clear any obstructions.

(when installed) Wall Tag If a wall tag is present, make sure it is legible and accurate. Please contact

Addison or your ADDISON

independent distributor if you need a wall tag.

See Page 5, Section 2.1.

34 of 49

SECTION 14: TROUBLESHOOTING

Cut/Pinch Hazard

Wear protective gear during installation, operation and service.

Edges are sharp.

WARNING

Failure to follow these instructions can result in death, electric shock, injury or property damage.

Burn Hazard

Allow heater to cool before service.

Tubing may still be hot after operation.

Explosion Hazard

Turn off gas supply to heater before service.

DANGER

Electrical Shock Hazard

Disconnect electric before service.

Heater must be connected to a properly grounded electrical source.

SECTION 14: TROUBLESHOOTING

35 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

14.1 General

36 of 49

14.2 Troubleshooting For Automatic Ignition Burner Systems

For your safety and optimum heater performance, use only replacement parts sold and supplied by

Addison.

Conduct start-up procedure as shown on Page 27, Section 11.

SECTION 14: TROUBLESHOOTING

37 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

NOTE: Minimum flame probe current 1 μA DC. Typical flame probe current 3-5 μA DC.

To measure flame current, connect a 0 - 50 μA DC meter in series with the flame probe. If the meter reads negative values, then reverse the test leads.

14.3 Troubleshooting for Flame Supervision System

START

Connect a DC ammeter in

series with the flame probe.

Is the flame present and

at least 1 μA DC flame

current?

Ye s

Is there a current flowing in the flame probe circuit with

no flame present?

Ye s

Does “lockout” occur when

there is a flame present?

Heater Operating

TROUBLESHOOT ENDS.

Ye s

Use General

Troubleshooting section to

trace the fault.

Is the connecting lead damaged? Is the flame probe damaged or touching earthed

components?

Is inlet burner gas pressure

correct? Is live and neutral

polarity correct? Is

flame probe circuit correct?

Repair or replace as

necessary.

If problems persist, contact

Addison at

www.addison-hvac.com

Repair or replace as

Ye s

necessary.

Replace ignition control.

38 of 49

14.4 Troubleshooting for Gas Valves

For your safety and optimum heater performance, use only genuine replacement parts sold and supplied by Addison.

Conduct start-up procedure as shown on Page 27, Section 11.

START

SECTION 14: TROUBLESHOOTING

Is gas pressure at inlet of the

valve correct for gas type?

Note pressure found.

Does gas pressure at outlet

of the valve rise when

valve turns on?

Does gas pressure at

outlet of valve return to zero or

lower when valve turns off?

Valve Operating

TROUBLESHOOT ENDS.

14.5 Troubleshooting for Flue Blower

Ye s

Fault elsewhere.

Correct pressure problem.

Valve or ignition control

faulty. Replace with one of correct type.

Valve faulty.

Replace with one of

correct type.

If problems persist, contact

Addison at

www.addison-hvac.com

START

Does flue blower run

automatically when there

is a call for heat?

Ye s

Does blower turn on and

off while burner is firing

continuously?

Blower Operating

TROUBLESHOOT ENDS.

Ye s

Correct power

supply problem.

Ye s

Blower motor faulty.

Replace with correct type.

Check blower motor leads

for loose connections.

If problems persist, contact

Addison at

www.addison-hvac.com

39 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Carbon Monoxide Hazard

WARNING

Use only genuine ADDISON® replacement parts per this installation, operation and service manual.

Failure to follow these instructions can result in death, electric shock, injury or property damage.

Explosion Hazard

DANGER

Electrical Shock Hazard

Fire Hazard

½PSI IN

OFF

Flexible Air Duct

Description Part Number

Gas Valve, NG (Models UHA[X][S] 150 - 250) 90032505 Gas Valve, LP (Models UHA[X][S] 150 - 250) 90032506 Gas Valve, NG (Models UHA[X][S] 300 - 400) 90032520 Gas Valve, LP (Models UHA[X][S] 300 - 400) 90032521

NOTE: Seperated combustion

model shown.

SECTION 15: REPLACEMENT PARTS

See warnings and important information on Page 32, Section 13 before removing or replacing parts.

Burner Components

All serviceable burner parts are accessed by the door on the side of the heater. Control door opens via tooled access.

15.1 Gas Valve

Remove the gas supply pipe at the heater inlet. Follow steps on Page 41, Section 15.2 and See Page 41, Section 15.2.1 to remove gas valve/ manifold.

Replace in reverse order. Verify that the gas flow direction of the valve is correct. Use a minimum amount of gas seal on the thread joint. Check that all the joints are leak free. Reset gas valve. See Page 29, Section 11.2.2.

IT IS IMPORTANT THAT ONLY THE CORRECT GAS VALVE IS USED WHEN REPLACING THESE CONTROLS.

40 of 49

15.2 Burner Compartment

Remove flexible

air duct from spigot

Remove

access plate

Remove screws and

pull off burner

compartment cover

Viewing port

for flame probe

Viewing port

for ignition electrode

Flame Probe

Burner

Compartment

Cover

Rubber Seal

Ignition Electrode

The burner compartment is a sealed compartment. Following any work, re-seal the compartment with the gas pipe rubber seal fully in place and all screws fitted and tight.

NOTE: Flexible duct only applies for model UHAS.

Ensure gas tight fitting of injectors. Ensure correct alignment with burners. Ensure all pipe joints are gas tight.

SECTION 15: REPLACEMENT PARTS

15.2.1 Burner Injectors

MODEL

Orifice Quantity 7 8 9 10 11 12 14 14

Natural Gas (G20)

Orifice Marking 43 43 2.25 mm 2.25 mm 2.25 mm 40 40 40

P/N 91930043 91930043 91930225 91930225 91930225 91930040 91930040 91930040

Propane (G31)

Orifice Marking 1.35 mm 1.35 mm 54 54 54 1.45 mm 53 53

P/N 91930135 91930135 91930054 91930054 91930054 91930145 91930053 91930053

UHA[X][S]

150

UHA[X][S]

175

UHA[X][S]

200

UHA[X][S]

225

UHA[X][S]

250

UHA[X][S]

300

UHA[X][S]

350

UHA[X][S]

400

41 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Description Part Number Qty.

Spark Electrode 90427411 1 Automatic Ignition Flame Probe 90439300 1 Transformer 90436900K 1 Ignition Module 90434008 1 Inshot Burners UHA[X][S] 150 92000001 7 Inshot Burners UHA[X][S] 175 92000001 8 Inshot Burners UHA[X][S] 200 92000000 9 Inshot Burners UHA[X][S] 225 92000000 10 Inshot Burners UHA[X][S] 250 92000000 11 Inshot Burners UHA[X][S] 300 92000000 12 Inshot Burners UHA[X][S] 350 92000000 14 Inshot Burners UHA[X][S] 400 92000002 14 Limit Switch (150 - 400) [300 - 400 LOWER] 90412103 1 Limit Switch (300 - 400) [UPPER] 90412105 1

To replace the electrode or flame probe, remove the electrical lead and screw. Pull out from mounting. Refit in reverse ensuring that the gap to burner is as shown in the front view of the burner compartment.

15.3 Ignition Electrode and Flame Probe

42 of 49

SECTION 15: REPLACEMENT PARTS

Push in Louver and

compress spring to

remove and replace

(opposite end first)

Horizontal Louvers

Push in Louver and

compress spring to

remove and replace

(opposite end first)

Horizontal Louvers

Description

UHA[X][S]

150 - 175

UHA[X][S]

200 - 250

UHA[X][S]

300 - 400

Horizontal Louvers P/N 11011847 11011847 11011846 Spring P/N 91901200 91901200 91901200 Quantity 7 9 11

15.4 Heat Exchanger

The heat exchanger consists of a six-pass design with 1.5" outer diameter [aluminized steel] [409 stainless steel] tube. The tube plates are made of [aluminized steel] [409 stainless steel]. The tube supports are made of [aluminized steel] [409 stainless steel].

15.5 Louvers and Louver Spring

The louvers for standard range models UHA[X][S]150 - UHA[X][S]400 are only available in horizontal configurations.

43 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Remove screws securing outlet flange to the flue adapter.

Refit in reverse order.

Remove screws securing flue

blower mounting plate to vent box.

Remove screws securing mounting plate to blower.

Refit in reverse.

Use new gaskets.

Ensure sealed joints.

Ensure mounting plate orifice is clear and not obstructed.

15.6 Flue Blower

UHA[X][S]

MODEL

Flue Blower P/N 90710405 90710403 90710402

150 - 175

IT IS IMPORTANT THAT ONLY THE CORRECT FLUE BLOWER SPECIFIED FOR EACH MODEL TYPE IS USED WHEN REPLACING THESE ITEMS.

UHA[X][S]

200 - 300

UHA[X][S]

350 - 400

Carry out a start-up after working on or changing an flue blower. See Page 27, Section 11.

44 of 49

15.7 Pressure Switch

SECTION 15: REPLACEMENT PARTS

Pull off 3 way connector. Spring open plastic clips of mounting cradle. Replace with correct type of pressure switch for model. The pressure switches are color coded for each pressure setting. Carry out a start-up after working on or changing a pressure switch. See Page 27, Section 11.

MODEL

Pressure Switch Kit P/N

Color Code

Set Point in. w.c.

Press ure Switch Snap Ring P/N

UHA[X][S]

150 - 175

90439802 90439808 90439803 90439807 90439808

yellow orange gray brown orange

.32.79.41.68.79

90439850 90439850 90439850 90439850 90439850

UHA[X][S]

200 - 225

UHA[X][S]

250

UHA[X][S]

300 - 350

UHA[X][S]

400

15.8 Ignition Control

The control mounts to the electrical plate. Pull out ignition cable and wiring from board, noting their positions. Release the four mounting standoffs. Refit in reverse. Ensure correct location of ignition cable and all other wiring.

15.9 Axial Fan/Guard/Motor Assembly

The axial fan unit for the heater is supplied completely assembled and balanced

MODEL UHA[X][S] 150 - 175 UHA[X][S] 200- 250 UHA[X][S] 300 - 400

Axial Fan Guard 91901104 91901104 91901105

Axial Fan Motor 90600107 90600107 90600106

Axial Fan Blade 90709006 90709006 90709005

45 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Remove the screws

and washers.

15.9.1 Fan Removal and Replacement

WARNING

Severe Injury Hazard

Turn off gas and electrical supply before service.

Fan can start automatically at any time.

Failure to follow these instructions can result in severe injury or product damage.

15.10 Limit Switches

15.10.1 Removal and Replacement

1. Remove the electrical connections to the switch.

2. Unscrew the two screws securing the switch.

3. Fit a new switch with two screws.

4. Reconnect the electrical connections and test operation.

Description Part Number Qty.

Axial Fan UHA[X][S] 150 - 175 90710417* 1 Axial Fan UHA[X][S] 200 - 250 90710417 1 Axial Fan UHA[X][S] 300 - 400 90710416 2

*For units built after July 2011. For units built before July 2011, P/N 90710416.

15.9.2 To Replace the Fan Assembly

To replace the fan assembly, reverse the procedure shown above.

• Check that the fan blades are free to rotate before turning on the power to the fan.

• Strictly comply with the color code of the fan

wires to ensure correct operation. See Page 24, Section 10.5 wiring diagram.

• Use only genuine replacement parts sold and supplied by Addison.

46 of 49

SECTION 16: SPECIFICATIONS

16.1 Dimension Data

SECTION 16: SPECIFICATIONS

47 of 49

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Model

(cm)

UHA[X][S]

150

42.4

(107.7)

26.7

(67.8)

25.5

(64.8)

17.6

(44.7)

19.4

(49.3)

30.0

(76.2)

6.0

(15.2)

8.6

(21.8)

15.3

(38.9)

3.4

(8.6)

5.9

(15.0)

2.4

(6.1)

6.5

(16.5)

UHA[X][S]

175

42.4

(107.7)

26.7

(67.8)

25.5

(64.8)

17.6

(44.7)

19.4

(49.3)

30.0

(76.2)

6.0

(15.2)

8.6

(21.8)

15.3

(38.9)

3.4

(8.6)

5.9

(15.0)

2.4

(6.1)

6.5

(16.5)

UHA[X][S]

200

42.4

(107.7)

35.0

(88.9)

25.5

(64.8)

17.6

(44.7)

19.4

(49.3)

32.0

(81.3)

6.0

(15.2)

8.3

(21.1)

17.2

(43.7)

3.4

(8.6)

5.9

(15.0)

2.4

(6.1)

6.5

(16.5)

UHA[X][S]

225

42.4

(107.7)

35.0

(88.9)

25.5

(64.8)

17.6

(44.7)

19.4

(49.3)

32.0

(81.3)

6.0

(15.2)

8.3

(21.1)

17.2

(43.7)

3.4

(8.6)

5.9

(15.0)

2.4

(6.1)

6.5

(16.5)

UHA[X][S]

250

42.4

(107.7)

35.0

(88.9)

25.5

(64.8)

17.6

(44.7)

19.4

(49.3)

32.0

(81.3)

6.0

(15.2)

8.3

(21.1)

17.2

(43.7)

3.4

(8.6)

5.9

(15.0)

2.4

(6.1)

6.5

(16.5)

UHA[X][S]

300

52.3

(132.8)

43.2

(109.7)

25.5

(64.8)

24.7

(62.7)

19.4

(49.3)

30.0

(76.2)

7. 0

(17.8)

11.2

(28.4)

13.8

(35.1)

6.2

(15.7)

8.7

(22.1)

2.4

(6.1)

6.5

(16.5)

UHA[X][S]

350

52.3

(132.8)

43.2

(109.7)

25.5

(64.8)

24.7

(62.7)

19.4

(49.3)

30.0

(76.2)

7. 0

(17.8)

11. 2

(28.4)

13.8

(35.1)

6.2

(15.7)

8.7

(22.1)

2.4

(6.1)

6.5

(16.5)

UHA[X][S]

(132.8)

(109.7)

16.2 General Technical Data Table

UHA[X][S]

Model

150

Full Load Amps @ 120 V A 10.6 10.6 10.6 10.6 10.6 11.6 11.6 11.6

Air Volume CFM 3500 3500 3716 3716 3716 4663 4663 4663

UHA[X][S]

175

UHA[X][S]

200

UHA[X][S]

225

UHA[X][S]

250

UHA[X][S]

300

UHA[X][S]

350

UHA[X][S]

400

52.3

43.2

25.5

(64.8)

24.7

(62.7)

19.4

(49.3)

30.0

(76.2)

7. 0

(17.8)

11.2

(28.4)

13.8

(35.1)

6.2

(15.7)

8.7

(22.1)

2.4

(6.1)

6.5

(16.5)

400

Flue and Air Intake

Flue Intake Size in (cm) 4 (10) 4 (10) 4 (10) 4 (10) 4 (10) 4 (10) 4 (10) 4 (10)

Air Intake Size in (cm) 4 (10) 4 (10) 4 (10) 4 (10) 4 (10) 5 (13) 5 (13) 5 (13)

*Maximum Straight Flue/Air Intake ft (m) 40 (1) 40 (1) 40 (1) 40 (1) 40 (1) 40 (1) 40 (1) 40 (1)

Weight (Net)

lbs

(kg)

217

(98.4)

237

(107.5)

255

(115.7)

265

(120.2)

270

(122.5)

355

(161.0)

375

(170.1)

375

(170.1)

*Do not exceed the maximum length of flue stated or heater may not operate properly.

16.3 Technical Data Table

Model

UHA[X][S]

150

Tot a l I n p ut(Btu/h) x (1000) 150 175 200 225 250 300 350 385

Tot a l O utput(Btu/h) x (1000) 123 143.5 164 184.5 205 246 287 315.7

Efficiency % 82 82 82 82 82 82 82 82

Natural Gas (G20) Data - Inlet Pressure 5.0 in wc Min., 14 in wc Max.

Burner Pressure in wc 3.2 3.4 3.7 3.7 4.0 2.7 2.7 3.3

LPG / Propane (G31) Data - Inlet Pressure 12.0 in wc Min., 14 in wc Max.

Burner Pressure in wc 9.9 10.4 10.5 10.7 10 .5 9 .4 9.3 11.1

UHA[X][S]

175

UHA[X][S]

200

UHA[X][S]

225

UHA[X][S]

250

UHA[X][S]

300

UHA[X][S]

350

UHA[X][S]

400

48 of 49

SECTION 17: THE ADDISON

UHA-SERIES WARRANTY

ADDISON WILL PAY FOR:

Within 24 months from date of purchase by buyer or 27 months from date of shipment by Addison (whichever comes first), replacement parts will be provided free of charge for any part of the product which fails due to a manufacturing or material defect.

Addison will require the part in question to be returned to the factory. Addison will, at its sole discretion, repair or replace after determining the nature of the defect and disposition of part in question.

ADDISON of 18 months from date of shipment from Addison or the remaining ADDISON

Replacement Parts are warranted for a period

UHA-Series warranty.

SECTION 17: THE ADDISON® UHA-SERIES WARRANTY

READ YOUR INSTALLATION, OPERATION AND SERVICE MANUAL

If you have questions about your controller, contact your installing professional. Should you need Replacement Parts or have additional questions, call or write:

Addison

7050 Overland Road Orlando, Florida 32810 Telephone: +1.407.292.4400 Fax: +1.407.290.1329

www.addison-hvac.com

ADDISON WILL NOT PAY FOR:

Service trips, service calls and labor charges. Shipment of replacement parts. Claims where the total price of the goods have not

been paid. Damage due to:

• Improper installation, operation or maintenance.

• Misuse, abuse, neglect, or modification of the ADDISON

• Use of the ADDISON

UHA-Series in any way.

UHA-Series for other than its

intended purpose.

• Incorrect gas or electrical supply, accident, fire, floods, acts of God, war, terrorism, or other casualty.

• Improper service, use of replacement parts or accessories not specified by Addison.

• Failure to install or maintain the ADDISON

UHASeries as directed in the Installation, Operation and Service manual.

• Relocation of the ADDISON

UHA-Series after initial

installation

• The use of the ADDISON

UHA-Series in a corrosive

atmosphere containing contaminants.

• The use of the ADDISON

UHA-Series in the vicinity

of a combustible or explosive material.

• Any defect in the ADDISON

UHA-Series arising from a drawing, design, or specification supplied by or on behalf of the consumer.

• Damage incurred during shipment. Claim must be filed with carrier.

WARRANTY IS VOID IF:

The ADDISON® UHA-Series is not installed by an electrician qualified in the installation and service of control systems for heating equipment.

Yo u cannot prove original purchase date and required annual maintenance history.

The data plate and/or serial number are removed, defaced, modified or altered in any way.

Addison's liability, and your exclusive remedy, under this warranty or any implied warranty (including the implied warranties of merchantability and fitness for a particular purpose) is limited to providing replacement parts during the term of this warranty.

Some jurisdictions do not allow limitations on how long an implied warranty lasts, so this limitation may not apply to you. There are no rights, warranties or conditions, expressed or implied, statutory or otherwise, other than those contained in this warranty.

Addison shall in no event be responsible for incidental or consequential damages or incur liability for damages in excess of the amount paid by you for the ADDISON

UHA-Series. Some jurisdictions do not

allow the exclusion or limitation of incidental or consequential damages, so this limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from jurisdiction to jurisdiction.

Addison shall not be responsible for failure to perform under the terms of this warranty if caused by circumstances out of its control, including but not limited to war, fire, flood, strike, government or court orders, acts of God, terrorism, unavailability of supplies, parts or power. No person is authorized to assume for Addison any other warranty, obligation or liability.

LIMITATIONS ON AUTHORITY OF REPRESENTATIVES:

No representative of Addison, other than an Executive Officer, has authority to change or extend these provisions. Changes or extensions shall be binding only if confirmed in writing by Addison's duly authorized Executive Officer.

The ownership of the ADDISON

UHA-Series is moved

or transferred. This warranty is nontransferable. Addison is not permitted to inspect the damaged

controller and/or component parts.

49 of 49

Addison UHA 250, UHA 175, UHA 300, UHA 350, UHA 400 Installation, Operation & Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual