FOR YOUR SAFETY 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.
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.
TABLE OF CONTENTS SECTION 1: Heater Safety......................................................1 1.1 Manpower Requirements .............................................1 1.2 Safety Labels and Their Placement..............................1 1.3 California Proposition 65 ..............................................1 SECTION 2: Installer Responsibility .....................................5 2.1 Wall Tag .......................................................................5 2.2 Corrosive Chemicals..........
TABLE OF FIGURES Figure 1: UHA[X][S] 30 - 45 Label Placement...........................2 Figure 2: UHA[X][S] 60 - 75 Label Placement...........................3 Figure 3: UHA[X][S] 100 - 125 Label Placement .......................4 Figure 4: Installation Clearances and Clearances to Combustibles .............................................................8 Figure 5: Suspension Methods ............................................... 12 Figure 6: Shelf-Mounting Methods .......................................
SECTION 1: HEATER SAFETY SECTION 1: HEATER SAFETY Your 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.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 1: UHA[X][S] 30 - 45 Label Placement Description Logo Label Cut Hazard Label Vent Length Label Vent to Outdoors Label Warning Label Rating Plate Label Installation Label Instruction Location Label Lighting Instruction Label Venting Arrangement Label* Manual Reset Switch Label Proposition 65 Label Part Number 91031107 91010430 91039505 91010427 91010429 91010440 91010431 91010433 91010425 91010426 91010428 91070015 * For separat
SECTION 1: HEATER SAFETY Figure 2: UHA[X][S] 60 - 75 Label Placement Description Logo Label Cut Hazard Label Vent Length Label Vent to Outdoors Label Warning Label Rating Plate Label Installation Label Instruction Location Label Lighting Instruction Label Venting Arrangement Label* Manual Reset Switch Label Proposition 65 Label Part Number 91031107 91010430 91039505 91010427 91010429 91010440 91010431 91010433 91010425 91010426 91010428 91070015 * For separated combustion units only 3 of 55
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 3: UHA[X][S] 100 - 125 Label Placement Description Logo Label Cut Hazard Label Vent Length Label Vent to Outdoors Label Warning Label Rating Plate Label Installation Label Instruction Location Label Lighting Instruction Label Venting Arrangement Label* Proposition 65 Label Part Number 91031107 91010430 91039505 91010427 91010429 91010440 91010431 91010433 91010425 91010426 91070015 * For separated combustion units only 4 of 55
SECTION 2: INSTALLER RESPONSIBILITY SECTION 2: INSTALLER RESPONSIBILITY 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.
UHA LOW PROFILE 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. 7 to ensure access for servicing and correct operation. 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 code on Page 15, Section 7. 3.
SECTION 4: CLEARANCES TO COMBUSTIBLES SECTION 4: CLEARANCES TO COMBUSTIBLES 4.1 Required Clearances to Combustibles WARNING of exposure to combustible airborne materials or vapors. 4.2 Clearances to Combustibles Clearances must be as indicated on Page 8, Figure 4. If clearances to combustibles are not indicated, then installation clearances apply. Fire Hazard Keep all flammable objects, liquids and vapors the required clearances to combustibles away from heater.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 4: Installation Clearances and Clearances to Combustibles Clearance to Vent: 2" (5 cm) * Recommended mounting height varies with heater input. Heaters may be mounted at a higher level if destratification fans are installed. **23" (58.4 cm) minimum is necessary for servicing. The heater must always be installed at least 6' (1.8 m) above the floor. The vent pipe must have clearance from combustibles by 2" (5 cm).
SECTION 5: NATIONAL STANDARDS AND APPLICABLE CODES SECTION 5: NATIONAL STANDARDS AND APPLICABLE CODES 5.1 Gas Codes The type of gas appearing on the serial 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 Natual Gas and Propane Installation Code. 5.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 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 derating. For installations from 2000' (610 m) to 4500' (1370 m) in Canada, high altitude conversion kits are available.
SECTION 6: HEATER INSTALLATION 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.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 5: Suspension Methods Figure 6: Shelf-Mounting Methods Shelf Mounting Brackets Existing cabinet screws must be re-used. 12 of 55 Description Part Number Shelf Mounting Bracket Kit 12011000K Shelf Mounting Bracket 11111510 Screw #10 x 1/2" 94311008 Type AB Phil HWH Z Qty.
SECTION 6: HEATER INSTALLATION Figure 7: Wall Shelf Mounting and Suspension Description Wall Shelf Mounting Bracket Kit Wall Suspension Mounting Bracket Kit Shelf Mounting Bracket Kit Part Number 12011002K 12011001K 12011000K Qty.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 8: Vertical Louvers Remove horizontal louvers. Install vertical louvers brackets (top and bottom) with supplied screws. Install vertical louvers and springs into brackets with springs at top.
SECTION 7: VENTING SECTION 7: VENTING WARNING Carbon Monoxide Hazard Heaters may be installed vented or unvented. Vented heaters must be vented outdoors. 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 AFTS100-73 standards. High temperature silicone sealant must have a minimum temperature rating of 480° F (250° C).
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 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 18, Figure 9 through Page 21, Figure 14. 7.3.1 Standard Vented Heaters (Models UHA[X] 30 - 125) The vent must be fitted with a low resistance terminal. See Page 18, Figure 9 through Page 19, Figure 11. Standard vented heaters do not allow outdoor air intake for combustion air. 7.3.
SECTION 7: VENTING period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a battery operated carbon monoxide detector with an alarm shall be installed. Approved Carbon Monoxide Detectors: Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Do not operate a summer exhaust fan. Close latest revision, National Fuel Gas Code (US) or fireplace dampers. Standard CSA B149.1 Natural Gas and Propane Installation Code (Canada). 4. Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so that the appliance will operate Figure 9: Vent and Roof Detail continuously. 5.
SECTION 7: VENTING Figure 11: Standard Vented Heater - Common Vertical Vent Termination Type "B" vent cap (7" [18 cm] or 8" [20 cm]) may be used. (These are not available from the manufacurer.) SIDE VIEW Type "B" Vent Pipe 2'(.6 m) Minimum Roof Flashing Roof The last section of vent pipe passing through the roof or wall may be Type "B" vent pipe. All other vent materials in the building must be single wall vent pipe.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 12: Separated Combustion Heater - Vertical and Horizontal Vent Termination Model Air Intake & Vent Diameter Part Number UHA[X]S 30 - 125 4" (10 cm) 90502102 Figure 13: Concentric Vent Box 20 of 55
SECTION 7: VENTING Figure 14: Concentric Vertical and Horizontal Vent Termination - Separated Combustion Heater Description Concentric Vent Kit Concentric Vent Box Top & Side Assembly Concentric Vent Box Bottom Assembly Screw #6 x 3/8 Self Drilling 4" (10 cm) Vent Terminal with Baffle Plate 6" (16 cm) Combustion Air Terminal Part Number UHVK1 90504113 90504112 91119100 90502102R 90502103 Qty.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 8: AIR SUPPLY 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. 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.
SECTION 9: GAS PIPING SECTION 9: GAS PIPING WARNING Fire Hazard Connect gas supply according to Figure 15. Do not use gas supply pipe and electrical connections to support heater’s weight. Gas can leak if not installed properly. Failure to follow these instructions can result in death, injury or property damage. 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.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 15: Gas Connection 24 of 55
SECTION 10: WIRING SECTION 10: WIRING DANGER Electrical Shock Hazard Disconnect electric before service or maintenance. Heater must be connected to a properly grounded electrical source. Failure to follow these instructions can result in death or electrical shock. All heater models require constant 120 V / 1Ø / 60 Hz power supply. Check heater serial plate for electrical rating for proper circuit sizing.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 10.3 Low Voltage Thermostat with Multiple Heaters Models UHA[X][S] 30 - 45 Model UHA[X][S] 30 - 45 26 of 55 Relay Type SPST Relay Part Number 90417600 Max.
SECTION 10: WIRING 10.4 Low Voltage Thermostat with Multiple Heaters Models UHA[X][S] 60 - 125 Model UHA[X][S] 60 - 125 Relay Type DPST Relay Part Number 90436300 Max.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 10.5 UHA[X][S] Internal Wiring Diagram IMPORTANT: 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.
SECTION 10: WIRING 10.6 UHA[X][S] Ladder Wiring Diagram IMPORTANT: 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.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 10.7 Electrical Connection to the Heater IMPORTANT: Junction box is not provided with heater. Conduit can also be attached directly to heater with wire junction made within the heater cabinet.
SECTION 11: OPERATION AND MAINTENANCE SECTION 11: OPERATION AND MAINTENANCE WARNING DANGER Electrical Shock Hazard Disconnect electric before service. Explosion Hazard Turn off gas supply to heater before service. Heater must be connected to a properly grounded electrical source. Burn Hazard Allow heater to cool before service. Cut/Pinch Hazard Wear protective gear during installation, operation and service. Tubing may still be hot Edges are sharp. after operation.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 16: Automatic Burner Control Sequence Burner Sequence for Ignition Control START RUN SHUT DOWN Thermostat 24 V Flue Blower Pressure Switch 30 Seconds Purge* P C 30 Seconds Post Purge NO NC ts = 10 Seconds Ignition Spark Start Gas Valve Flame Signal 30 Seconds Delay 90 Seconds Delay Axial Fan *Purge time begins at pressure switch change over.
SECTION 11: OPERATION AND MAINTENANCE Figure 18: Gas Valve for Models UHA[X][S] 60 - 125 TOP VIEW Regulator ½PSI END VIEW C IN ON OFF Gas Inlet Inlet Pressure 11.2.2 Start-Up the Gas Valve (All Gases) 11.2.2.1 Check Burner Gas Pressure 1. Remove the plug 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.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 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 during off-season. 11.5 External Controls External controls may include time switch, interlock switch, room thermostat and frost thermostat.
SECTION 12: USER INSTRUCTIONS SECTION 12: USER INSTRUCTIONS WARNING DANGER Electrical Shock Hazard Disconnect electric before service. Explosion Hazard Turn off gas supply to heater before service. Heater must be connected to a properly grounded electrical source. Burn Hazard Allow heater to cool before service. Cut/Pinch Hazard Wear protective gear during installation, operation and service. Tubing may still be hot Edges are sharp. after operation.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 19: Manual Reset Limit Switch Reset Button To reset manual reset limit switch, press reset button. NOTE: To reset, the switch must be cool. Description Manual Reset Limit Switch Part Number 90412106 12.4.1 Simple Troubleshooting (Burner Faults) If the burner fails to ignite for any reason, it will retry for ignition (four trials total).
SECTION 13: SERVICING SECTION 13: SERVICING WARNING DANGER Electrical Shock Hazard Disconnect electric before service. Explosion Hazard Turn off gas supply to heater before service. Heater must be connected to a properly grounded electrical source. Burn Hazard Allow heater to cool before service. Cut/Pinch Hazard Wear protective gear during installation, operation and service. Tubing may still be hot Edges are sharp. after operation.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 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 45, Section 15.1. Do not repair or disassemble gas valve. Replace faulty gas valves with replacement parts sold and supplied by Addison. 13.6 Flue Blower The flue blower should not require maintenance.
SECTION 13: SERVICING 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. Heat Exchanger See Page 22, Section 8. Make sure there are no cracks. Make sure there is no sagging, bending or distortion. Gas Line and Shut-off Valves Burner Observation Window Clean or replace as required.. Check for gas leaks. See Page 23, Section 9.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 14: TROUBLESHOOTING WARNING DANGER Electrical Shock Hazard Disconnect electric before service. Heater must be connected to a properly grounded electrical source. Explosion Hazard Turn off gas supply to heater before service. Burn Hazard Allow heater to cool before service. Cut/Pinch Hazard Wear protective gear during installation, operation and service. Tubing may still be hot Edges are sharp. after operation.
SECTION 14: TROUBLESHOOTING 14.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 14.2 Troubleshooting For Automatic Ignition Burner Systems For optimum heater performance, use only replacement parts sold and supplied by Addison. Conduct start-up procedure as shown on Page 31, Section 11.
SECTION 14: TROUBLESHOOTING 14.3 Troubleshooting for Flame Supervision System 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. NOTE: Minimum flame probe current 1 µA DC. Typical flame probe current 3-5 µA DC.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 14.4 Troubleshooting for Gas Valves 14.5 Troubleshooting for Flue Blower For optimum heater performance, use only replacement parts sold and supplied by Addison. Conduct start-up procedure as shown on Page 31, Section 11.
SECTION 15: REPLACEMENT PARTS SECTION 15: REPLACEMENT PARTS WARNING DANGER Electrical Shock Hazard Explosion Hazard Fire Hazard Carbon Monoxide Hazard 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. See warnings and important information on Page 37, Section 13 before removing or replacing parts.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 15.2 Burner Injectors Remove four screws to remove manifold. Ensure gas tight fitting of injectors. Ensure correct alignment with burners. Ensure all pipe joints are gas tight.
SECTION 15: REPLACEMENT PARTS 15.3 Ignition Electrode and Flame Probe 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.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 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 Louver and Louver Springs For models UHA[X][S] 60 and UHA[X][S] 75, horizontal louvers are re-used.
SECTION 15: REPLACEMENT PARTS 15.6 Flue Blower Vertical Installation To remove the blower, remove screws securing the fan and mounting plate to the vent box. To remove the blower from the mounting plate, remove screws. Refit in reverse order. To change the vent and air intake orientation from back to top, remove the blower and mounting plate as above. Remove intake and exhaust covers from top of the heater.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 15.7 Pressure Switch WARNING Carbon Monoxide Hazard Use correct pressure switch specified for each model. Use of incorrect pressure switch or disabling pressure switch circuit could cause unsafe condition. Failure to follow these instructions can result in death or serious injury. Pull off 3 way connector. Spring open plastic clips of mounting cradle. Replace with correct type of pressure switch for model.
SECTION 15: REPLACEMENT PARTS 15.9.1 Fan Removal and Replacement WARNING Severe Injury Hazard Turn off gas and electrical supply before service. • Use only genuine replacement parts sold and supplied by Addison. 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. Fan can start automatically at any time.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 16: SPECIFICATIONS 16.1 Dimension Data Models UHA[X][S]30 UHA[X][S]45 UHA[X][S]60 UHA[X][S]75 UHA[X][S]100 UHA[X][S]125 52 of 55 in cm in cm in cm in cm in cm in cm A B C D E F G H J K L M N P Q R 28.7 73.0 28.7 73.0 28.7 73.0 28.7 73.0 28.7 73.0 28.7 73.0 11.9 30.2 11.9 30.2 17.7 45.0 17.7 45.0 22.7 57.6 22.7 57.6 22.3 56.6 22.3 56.6 22.3 56.6 22.3 56.6 22.3 56.6 22.3 56.6 17.6 44.7 17.6 44.7 17.6 44.7 17.
SECTION 16: SPECIFICATIONS 16.2 General Technical Data Table Full Load Amps @ 120 V Air Volume Model UHA[X][S] 30 UHA[X][S] UHA[X][S] UHA[X][S] 45 60 75 A 3.0 3.0 4.1 CFM 691 691 1376 UHA[X][S] 100 UHA[X][S] 125 4.1 5.8 5.8 1376 1902 1902 Flue and Air Intake Flue and Air Intake Size in (cm) *Maximum Straight Flue/Air Intake Weight (Net) 4 (10) - All Models ft (m) 25 (7.6) 25 (7.6) 25 (7.6) 25 (12.2) 40 (12.2) 40 (12.2) lbs (kg) 65 (29.5) 70 (31.8) 85 (38.6) 90 (40.
UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 54 of 55
SECTION 17: ADDISON® UHA-SERIES WARRANTY SECTION 17: ADDISON® UHA-SERIES WARRANTY Addison is not permitted to inspect the damaged ADDISON WILL PAY FOR: Within 24 months from date of purchase by buyer or 27 months from the 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.
