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Roberts Gorden Blackheat UHA-Series 100 User's Manual

1. 32 3 2 Manufactured Units 6 SECTION 11 User Instructions 33 3 3 Location and Suspension 6 11 1 User Instructions 33 3 4 Minimum Required Installation Clearances 6 11 2 Heater Operation a 33 3 5 Clearances to Combustibles 6 11 3 Common User Controls 33 3 6 Ventilation etii 6 11 4 Lighting Instructions 33 3 7 Gas Supply isa tede taedia reed 7 11 5 Simple Troubleshooting 34 3 8 Electrical Supply seen 7 SECTION 12 Servicing 35 3 9 Vent iint cries 7 12 1 Servicing Instructions 35 SECTION 4 National Standards and Applicable Codes 8 12 2 Burner Maintenance 35 LEECtIeu It 8 12 3 Fan Motor Assembly Maintenance 35 4 2 Aircraft Hangars eese 8 12 4 Heat Exchanger 35 4 3 Parking Structures and Repair Garages 8 12 5 Gas Valve Maintenance
2. 35 AA ElectriCal Eaa 8 12 6 Flue Blower 35 4 5 ioo eH 8 12 7 Venting and Air Intake 36 4 6 High Altitude retirer engines 9 12 8 Maintenance Checklist 36 SECTION 5 Major Components 10 SECTION 13 Troubleshooting 38 S I General ku y 10 ASA General rep eder Rete Ruedas 38 5 2 Shelf Mounting and Suspension 10 13 2 Troubleshooting For Automatic Ignition 5 3 Wall Mountilng u ccce einer tact 10 Burner Systems essent 39 SECTION 6 Venting 1 cinere eee ces 14 13 3 Troubleshooting for Flame Supervision System 40 6 1 Changing Vent and Air Intake Orientation 14 13 4 Troubleshooting for Gas 41 6 2 Vent 14 13 5 Troubleshooting for Flue Blower 41 6 3 Vent Installation u 14 SECTION 14 Replacement 42 6 4 Unvented 15 14 1 Gas Valves ie aeinn 42 6 5 Horizontal Venting a 15 14 2 Burn
3. 31 30 Seconds Delay 90 Seconds Delay gt Axial Fan Purge time begins at pressure switch change over bon Dn Mais 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 Signals Output By Control Nr Figure 17 Gas Valve for Models UHA X S 30 45 Pressure Regulator Gas Outlet Description Part Number Gas Valve 30 45 NG 90034500 Gas Valve 30 45 LP 90034600 Outlet Pressure 30 SECTION 10 OPERATION AND MAINTENANCE Figure 18 Gas Valve for Models UHA X S 60 125 END VIEW TOP VIEW Gas Inlet Pressure Description Part Number Inlet Pressure Gas Valve 60 125 NG 90032505 Gas Valve 60 125 LP 90032506 10 2 2 Start Up the Gas Valve All Gases pressure setting then the gas inlet pressure must be 10 2 2 1 Check Burner Gas Pressure corrected before completing the start up 1 Remove the plug in the outlet burner pressure test point and connect a pressure tap and a Check Gas Rate manometer 1 After burner pressure adjustment allow the 2 With the burner firing measure the pressure on heater to operate for at least 15 minutes and the manometer To adjust the burner pressure then re check settings Adjust pressure
4. Description Part Number Logo Label 91033203 Cut Hazard Label 91010430 Vent Length Label 91039505 mesmo Vent to Outdoors Label 91010427 Lighting Instructions Warning Label 91010429 Label Rating Plate Label 91010420 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label 91010426 Manual Reset Switch Label 91010428 For separated combustion units only UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 3 UHA 100 125 Label Placement FRONT VIEW BACK VIEW WARNING Cut Hazard Blackheat L VENT TO OUTDOORS TM DONNER VENT A hy ROBERTS GORDON Outdoors Label L Label Vent Length Label ACCESS SIDE VIEW OUTSIDE ACCESS SIDE VIEW INSIDE ELI Emm EN Em WARNING r Gas E s a SS Es i E E nstallation Label Venting Arrangement Label pem EI
5. FOR YOUR SAFETY If you smell gas Open windows DO NOT try to light any appliance DO NOT use electrical switches DO NOT use any telephone in your building Leave the building Immediately call your local gas supplier after leaving the building Follow the gas supplier s instructions If you cannot reach your gas supplier call the Fire Department WARNING Fire Hazard Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance 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 A WARNING 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 Installation must be done by a contractor qualified in the installation and service of gas fired heating equipment or your gas supplier Quality in Any Language 2008 Roberts Gordon LLC gt S ROBERTS GORDON Ser Blackheat UHA Series Tubular Unit Heaters Low Profile Range Installation Operation amp Service Manual Models UHA X S 30 45 60 75 100 125 Installer Please take the time to read and understand these instructions prior to any installation Installer must give a copy of this
6. TOP VIEW 16 63 42 cm Air Flue Air Intake UHA X S only Optional Position Optional Position SIDE VIEW 4 x 3 8 Captive Nuts Provided 25 5 20 25 51 cm gt 65 cm l Intake s 9 UHA X S 15 cm only Thermostat connor on Gas Supply e 49 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 15 2 General Technical Data Table All Models Model UHA X S UHA X SM UHA X S UHA X S UHA X S UHA X S 30 5 60 75 100 125 Low Profile UHA X S Axial Fans Full Load Amps 115 V A 3 0 3 0 4 1 4 1 5 8 5 8 Air Volume CFM 691 691 1376 1376 1902 1902 Flue and Air Intake Flue and Air Intake Size in cm 4 10 All Models Maximum Straight Flue Air Intake ft m 25 7 6 25 7 6 25 7 6 25 12 2 40 12 2 40 12 2 Do not exceed the maximum length of flue stated or heater may not operate properly 15 3 Technical Data Table All Models Model UHA X S UHA X S UHA X S UHA X S UHA X S UHA X S 30 45 60 75 100 125 Total Input Btu h x 1000 30 45 60 75 100 125 Total Output Btu h x 1000 24 6 36 9 49 2 61 5 82 102 5 Efficiency 96 82 All Models Natural Gas G20 Data I
7. UHVK1 90504113 1 90504112 1 91119100 14 90502102R 1 90502103 1 Concentric Vent Kit Concentric Vent Box Top amp 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 20 SECTION 7 AIR SUPPLY 7 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 7 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 WARNING Combustion by products contain a chemical known to the State of California to cause cancer and birth defects or other reproductive harm 7 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 7 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 such as halogenated hydrocarbons are present in the air an outside combustion air supply to th
8. Intake amp Rotate the blower mountin Exhaust otate the blower mounting plate and gasket clockwise until the flue adapter lines up with the top hole Secure Screws Flexible Air f applicable remove the flexible air duct from the air intake adapter on the back If applicable remove the air intake adapter from the back of the heater and install in the appropriate hole on top Mounting Plate Reconnect the flexible air to Vent Box duct fixing screws NOTE Seperated combustion model shown Install intake and exhaust covers over the back holes MODEL 5 30 75 UHA X S 100 125 Flue Blower P N 90710404 90710405 IT IS IMPORTANT THAT ONLY THE CORRECT FLUE BLOWER SPECIFIED FOR EACH MODEL TYPE IS USED WHEN REPLACING THESE ITEMS Carry out a start up after working on or changing an flue blower See Page 33 Section 11 46 14 7 Pressure Switch 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 29 Section 10 A WARNING Carbon Monoxide Hazard Use correct pressure switch specified for each model according to manual SECTION 14 REPLACEMENT PARTS Use of incorrect pressure switch or disabling pressure switch circuit could cause unsafe condit
9. Part Number Shelf Mounting Bracket Kit 12011000K Shelf Mounting Bracket 11111510 Screw 10 x 1 2 Type AB Phil HWH Z 94311008 Shelf Mounting Brackets Existing cabinet screws must be re used 11 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 7 Wall Shelf Mounting and Hanging Suspension Wall Shelf Mounting Wall Hanging Suspension T lt mmi Shelf 3 8 Fasteners Mounting Brackets Fasten to Wall Mounting E Bracket 4 Wall Mounting Bracket Arm Right amp Left 5 16 x 3 1 2 Bolt 5 16 Flat Washer 5 16 Locknut with Nylon Insert Torque to 40 in Ib 4 5 Nm Wall Mounting Bracket Diagonal 4 _ Wall Mounting Bracket Vertical c Description Part Number Description Part Number Wall Shelf Mounting Bracket Kit 12011002K Wall Suspension Mounting Bracket Kit 12011001K Wall Suspension Mounting Bracket Kit 12011001K Wall Mounting Bracket Arm Left 1H WALL1L Shelf Mounting Bracket Kit 12011000K Wall Mounting Bracket Arm Right 111WALL1R Wall Mounting Bracket Vertical 111WAL2 Wall Mounting Bracket Diagonal 111WAL3 5 16 x 3 1 2 Bolt 97213925 5 16 Lock Nut with Nylon Insert 92114000 5 16 Flat Washer 95211600 5 16 Lockwasher 96411600 Od N N Hardware provided t
10. 100 125 Description Part Number Horizontal Louvers P N 11111900 Vertical Louver Kit UHA X S 60 amp UHA X S 75 12011005K Spring P N 91901200 Vertical Louver Bracket Quantity 5 UHA X S 60 75 Vertical Louvers Instruction Sheet Description Part Number 3110 Screw Vertical Louver Kit UHA X S 30 amp UHA X S 45 12011003K Description Part Number Vertical Louver Bracket UHA X S 30 45 Vertical Louvers Vertical Louver Kit UHA X S 100 amp UHA X S 125 12011004K Louver Spring Vertical Louver Bracket Instruction Sheet UHA X S 100 125 Vertical Louvers 10 Screw Instruction Sheet 10 Screw 10 Screw 45 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 14 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 Exhaust the mounting plate remove Covers Screws rj Mounting Plate to Vent Box Refit in reverse order fixing screws To change the vent and air Gaskets intake orientation from back to top remove the blower and mounting plate as above Air Intake Adaptor Vent Box Mounting Plate to Flue Blower Remove intake if screws applicable and exhaust covers from top of the heater
11. 4 flashes LED code Fan and limit switch are operating normally Yes Replace temperature limit switch Does flue blower run Is 120 V supply at fan connections Flue blower faulty replace Yes Burner control faulty or wiring connections faulty Repair or replace as required Check for too much vent air inlet duct Check for blockage in vent and combustion air circuit Check for faulty air pressure Switch Check pressure switch hoses for leaks or cracks Do not attempt to circumvent pressure switch circuit to place unit in operation See Pressure Switch section for details Does air pressure switch change over Wait 30 40 seconds Does ignition spark operate Is ignition lead okay and connected Is spark electrode okay Ignition control faulty replace See Ignition Control section Yes Is the gas valve operating To test valve See Troubleshooting for Gas Valves section Does the flame light Replace valve Is the flame current at least 1 uAmp DC when Yes the flame ignites Trace fault in supervision System See Troubleshooting for Flame Supervision System section Is ignition control showing a 2 flashes LED code If problems persist contact Roberts Gordon LLC at www rg inc com Heater Operating TROUBLESHOOT ENDS SECTION 13 TROUBLESHOOTING For optimu
12. Axial Fan UHA X S 30 12011910 1 Axial Fan UHA X S 45 12011911 1 Axial Fan UHA X S 60 12011920 1 Axial Fan UHA X S 75 12011921 1 ur Fan UHA X S 100 and UHA X S 12011922 1 14 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 e Strictly comply with the color code of the fan wires to ensure correct operation See Page 26 Section 9 5 wiring diagram Use only replacement parts sold and supplied by Roberts Gordon 14 10 Limit Switches 14 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 48 SECTION 15 SPECIFICATIONS 15 1 Dimension Data SECTION 15 SPECIFICATIONS MODEL UHA X S UHA X S UHA X S UHA X S UHA X S UHA X S 30 45 60 75 100 125 A Height in 12 12 1775 1775 23 23 9 cm 30 48 30 48 45 09 45 09 58 42 58 42 C Center of Flue Top in 5 2 5 2 5 2 5 2 6 9 6 9 Option cm 13 21 13 21 13 21 13 21 1753 1753 I in 2 5 2 5 2 5 2 5 2 5 2 5 D Center of Flue cm 6 35 6 35 6 35 6 35 6 35 6 35 Recommended Mounting ft 10 10 12 12 20 20 Height to Heater Base m 3 05 3 05 3 66 3 66 6 10 6 10
13. all the joints are leak free Reset gas valve See Page 31 Section 10 2 2 Explosion Hazard IT IS IMPORTANT THAT ONLY THE CORRECT GAS VALVE IS USED WHEN REPLACING THESE Installation service and annual inspection CONTROLS must be done by a contractor qualified in the installation and service of gas fired heating equipment or your gas supplier Turn off gas and electrical supplies before performing service or maintenance Failure to follow these instructions can result in death injury or property damage See warnings and notes on Page 35 Section 12 before removing or replacing parts Burner Components All serviceable burner parts are accessed by the door on the side of the heater Remove the sheetmetal screws NOTE Seperated combustion model shown 886 Description Part Number Gas Valve NG Models UHA X S 30 45 90034500 Gas Valve LP Models UHA X S 30 45 90034600 Gas Valve NG Models UHA X S 60 125 90032505 Gas Valve LP Models UHA X S 60 125 90032506 14 2 Burner Compartment 3X mmi t w Burner Compartment Cover Viewing port for flame probe ZEN gt Flame Probe Ignition Electrode r1 Remove flexible air duct from spigot Remove screws and pull off burner cover Inshot Burners V Or
14. to Heater Exhaust from Heater Use 3 sheetmetal screws equally spaced around joint 4 10 cm Single Wall Vent Pipe By Others Minimum from wall to vent termination 12 31 cm Minimum from wall to vent termination N al 4 Vent way Termination uc ni 4 Air Intake pe Termination mm 4 12 81 cm Minimum from air inlet to vent termination may be horizontal or vertical clearance 6 15 cm Single Wall Inlet Air Pipe S Concentric By Others Vent Box Use 3 sheetmetal screws equally spaced around collar 19 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 14 Concentric Vertical and Horizontal Vent Termination Separated Combustion Heater NOTE Vent supports Vent Terminal shown 4 10 cm with Baffle Plate Type B 1__ Vent Storm Collar By Others 6 16 cm Attach with 3 sheet metal screws Combustion Air Terminal Flashing By Others Concentric Vent Box 4 10 cm Diameter 6 16 cm Air Intake 4 10 cm Vertical Diameter Option 10 3 m Maximum Maximum Vent Terminal with Baffle Plate 4 10 cm Diameter Horizontal Option Diameter Vent Concentric Vent Box Description Part Number Qty Combustion Air Terminal Storm Collar By Others Attach with 3 sheet metal screws
15. Conmnections u UU 22 15 2 General Technical Data Table All Models 50 SECTION 9 WirIng eec t iie 23 15 3 Technical Data Table All Models 50 9 1 Positioning Thermostats 23 SECTION 16 ROBERTS GORDON BLACKHEAT 9 2 Low Voltage Thermostat with One Heater 23 UHA Series Warranty 51 9 3 Low Voltage Thermostat with Multiple Heaters 30 45 24 2008 Roberts Gordon LLC 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 Roberts Gordon LLC Printed in U S A TABLE OF FIGURES Figure 1 UHA 30 45 Label Placement 2 Figure 2 UHA 60 75 Label Placement 3 Figure 3 UHA 100 125 Label Placement 4 Figure 4 Installation Clearances and Clearances to Combustibles 7 Figure 5 Suspension Methods 11 Figure 6 Shelf Mounting Methods 11 Figure 7 Wall Shelf Mounting and Hanging Suspe
16. UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 1 UHA 30 45 Label Placement FRONT VIEW BACK VIEW A WARNING Cut Hazard Far SE SS lt J Z H Blackheat VENT TO OUTDOORS DONNER VENT Cut Hazard Label by ROBERTSGORDON Vent to Outdoors Label Logo Label Vent Length Label ACCESS SIDE VIEW INSIDE ACCESS SIDE VIEW OUTSIDE A NG ATTENTION n Emm C WARNING cS C m 1 WARNING Installation Label Instruction Location Label E Venting Arrangement Manual Reset Label Switch Label ewm Rating Plate Label Warning Label Label Description Part Number Logo Label 91033203 Cut Hazard Label 91010430 Vent Length Label 91039505 Vent to Outdoors Label 91010427 Warning Label 91010429 Rating Plate L
17. be vented outdoors Unvented heaters must be installed in buildings with ventilation rates as per section 6 4 Failure to follow these instructions can result in death or injury 6 1 Changing Vent and Air Intake Orientation The heater is sold with rear horizontal vent and air intake connections as standard only separated combustion models have air intake connection If vertical vent and air intake connections are required follow the instructions on Page 46 Section 14 6 6 2 Venting 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 NFPA54 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 15 Section 6 4 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 public walkways V
18. 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 Not all heaters are approved for residential installation Check the heater s silver rating plate for residential approval status Heaters that do not have residential approval must not be installed in residential spaces 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 including the various venting components 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 1 1 Manpower Requirements 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 labels should be replaced by product user when they are no longer legible Please contact Roberts Gordon LLC or your ROBERTS GORDON independent distributor to obtain replacement signs or labels See Page 2 Figure 1 through Page 4 Figure 3 SECTION 1 HEATER SAFETY UHA Low PROFILE
19. carbon monoxide detector with an alarm is installed on each additional level of the dwelling building or structure served by the side wall horizontal vented gas fueled equipment It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard wired carbon monoxide detectors Inthe event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic the hard wired carbon monoxide detector with alarm and battery back up may be installed on the next adjacent floor level 15 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Inthe event that the requirements of this subdivision can not be met at the time of completion of installation the owner shall have a 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 Signage A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight 8 feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating app
20. installations and service of ROBERTS GORDON equipment must be performed by a contractor qualified in the installation and service of equipment sold and supplied by Roberts Gordon and conform to all requirements set forth in the ROBERTS GORDON manuals and all applicable governmental authorities pertaining to the installation service and operation of the equipment To help facilitate optimum performance and safety Roberts Gordon recommends that a qualified contractor annually inspect your ROBERTS GORDON equipment and perform service where necessary using only replacement parts sold and supplied by Roberts Gordon These products are not approved for residential use except for models UHA X S 30 UHA X IS 75 2008 Roberts Gordon LLC All rights reserved No part of this work covered by the copyrights herein my be reproduced or copied in any form or by any means graphic electronic or mechanical including photcopying recording taping or information storage and retrieval systems without written permission of Roberts Gordon LLC Printed in the U S A Attach this information to the wall near the ROBERTS GORDON heater ROBERTS GORDON SA Read the Installation Operation and Service Manual thoroughly before installation operation or service OPERATING INSTRUCTIONS 1 STOP Read all safety instructions on this information sheet 2 Open the manual gas valve in the heater supply line 3 Turn on electric power to th
21. manual to the owner Owner Keep this manual in a safe place in order to provide your serviceman with necessary information Roberts Gordon LLC 1250 William Street Box 44 Buffalo New York 14240 0044 Telephone 716 852 4400 Fax 716 852 0854 Toll Free 800 828 7450 www rg inc com P N BH111100NA 11 08 Rev D TABLE OF CONTENTS SECTION 1 Heater Safety 1 9 4 Low Voltage Thermostat with 1 1 Manpower 1 Multiple Heaters 60 125 25 1 2 Safety Labels and Their Placement 1 9 5 Internal Wiring Diagram 26 SECTION 2 Installer Responsibility 5 9 6 Ladder Wiring Diagram 27 21 Wall Tag 9 7 Electrical Connection to the Heater 28 2 2 Corrosive Chemicals SECTION 10 Operation and Maintenancoes 29 2 3 National Standards and Applicable Codes 5 10 1 Pre Start Up Checks 29 SECTION 3 Critical Considerations 6 10 2 Begin Start Up U Sa Sana asam taya 29 3 1 Basic Information a 6 10 3 Complete Start Up
22. over firing or persistently low air flows 12 5 Gas Valve Maintenance No regular maintenance is required on this device To change gas control valves See Page 42 Section 14 1 Do not repair or disassemble gas valve Replace faulty gas valves with replacement parts sold and supplied by Roberts Gordon 12 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 46 Section 14 6 Ensure that the fan is free to run and that the fan wheel is clean 35 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 12 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 required Check all venting and air intake components to ensure they are in good condition gas tight and corrosion free 12 8 Maintenance Checklist A WA R N N G Installation Code and Annual Inspections All installations and service of ROBERTS GORDON equipment must be performed by a contractor qualified in the installation and service equipment sold and suppli
23. setting remove the regulator cover from the valve and if necessary turn the regulator adjustment screw to set the 2 Check gas flow rate at gas meter required burner pressure as stated in the 3 Turn off heater and electrical supply Technical Data Tables for the correct gas and 4 Remove the manometer and refit all covers to model on Page 50 Section 15 3 the valve and tighten the screw of the outlet pressure tap IMPORTANT If the correct burner pressure cannot be reached then check the inlet pressure to the 10 2 3 Pressure Switch valve with the burner firing See Technical Data Tables on Page 50 Section 15 3 for inlet pressure requirement The pressure switch is factory pre set for each model and is not adjustable Do not continue to adjust the regulator if the 10 2 Tuming a LL pressure is not changing Set the thermostat to the OFF position or lowest setting and the main burner will stop If the inlet pressure is too low to allow correct burner The fan will continue to run for 90 seconds Do not use a disconnect switch for control of heater Disconnect switch will turn off the fan 31 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 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 10 2 5 External Controls External controls may inc
24. vented heaters must be individually vented Vent pipe must be sloped 6 cm for every 1 3 m For vent lengths greater than 5 1 5 m condensation will form Insulation is recommended and condensation drains may be desired 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 In the State of Massachusetts the following regulations apply to horizontally vented heaters certified for installation in structures used in whole or in part for residential purposes UHA 30 75 only and where the side wall exhaust vent termination is less than seven 7 feet above finished grade in the area of the venting including but not limited to decks and porches Installation of Carbon Monoxide Detectors At the time of installation of the side wall horizontal vented gas fueled equipment the installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back up is installed on the floor level where the gas equipment is to be installed In addition the installing plumber or gasfitter shall observe that a battery operated or hard wired
25. D code Fan and limit switch are Yes operating normally Replace temperature limit switch Burner has locked out due to ignition failure Use Troubleshooting for Automatic Ignition Burner Systems section to test burner Is ignition control showing a 2 flashes LED code Yes Use Troubleshooting for Flue Blower section to test fan Does the flue blower run The limit switch has tripped See Manual Reset No Limit Switch Figure With external controls i e thermostat on does the burner continue through the heating cycle No Has burner Locked Out No Replace limit switch Use Troubleshooting for Automatic Ignition Burner Systems section to test burner Ensure proper air flow clearance for axial fan Open louvers slightly Replace axial fan if it does not operate If problems persist contact Roberts Gordon LLC at www rg inc com Heater Operating TROUBLESHOOT ENDS No 38 13 2 Troubleshooting For Automatic Ignition Burner Systems START Are gas amp electrical supplies on Turn on supplies Are external controls i e Thermostat on Turn on controls UHA 30 75 Press in reset button on manual reset limit Switch UHA 100 125 Wait 10 15 minutes for limit Yes Switch to cool Does fan stop running Is ignition control showing a
26. E Instruction Location Label WARNING Fire Rating Plate Label d Warning Label Lighting Instructions Description Part Number Logo Label 91033203 Label Cut Hazard Label 91010430 Vent Length Label 91039505 Vent to Outdoors Label 91010427 Warning Label 91010429 Rating Plate Label 91010420 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label 91010426 For separated combustion units only 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 Roberts Gordon 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 Ser
27. Gas Connector ij Option B Medium or Heavy Gauge Pipe Gas Connector 4 Drip Leg d t Union Connection SECTION 9 WIRING A WARNING Electrical Shock Hazard Disconnect electrical and gas supply before servicing This appliance 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 1 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 Heater must be wired and electrically grounded in accordance with local codes In the absence of local 9 2 Low Voltage Thermostat with One Heater SECTION 9 WiRING 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 latest revision 9 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 di
28. Look for signs of wear on the suspension materials or ceiling See Page 11 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 when installed Flush drain and clear any obstructions Wall Tag If wall tag is present make sure it is legible and accurate Please contact Roberts Gordon LLC or ROBERTS GORDONO independent distributor if you need a wall tag See Page 5 Section 2 1 37 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 13 TROUBLESHOOTING 13 1 General A WARNING START Are gas amp electrical supplies on Turn on supplies Explosion Hazard Installation service and annual inspection must be done by a contractor qualified in the installation and service of gas fired heating equipment or your gas supplier Turn off gas and electrical supplies before performing service or maintenance Failure to follow these instructions can result in death injury or property damage UHA 30 75 Press in reset button on manual reset limit Switch UHA 100 125 Wait 10 15 minutes for limit Yes Switch to cool Does fan stop running Is ignition control showing a 4 flashes LE
29. TAT GREEN HEAT DEMAND INPUT FROM THERMOSTAT WHITE COMMON SIDE OF TRANSFORMER THERMOSTAT INPUT FIELD SUPPLIED 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 26 SECTION 9 WiRING 9 6 Ladder Wiring Diagram 120 VAC FLAME SENSOR Flame IGNITION MODULE Limit Switch Limit Switch UHA 300 1350 400 Onl y E THERMOSTAT CONNECTION 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 27 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 9 7 Electrical Connection to the Heater Burner Connect wires together with suitable approved wire connectors Green to Ground White to L2 Black to L1 IMPORTANT Junction box is not provided with heater Conduit can also be attached directly to heater with wire junction made within the heater cabinet 28 SECTION 10 OPERATION AND MAINTENANCE A WARNING Explosion Hazard Installation service and annual inspect
30. 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 Roberts Gordon Failure to install or maintain the ROBERTS GORDON BLACKHEAT UHA Series as directed in the Installation Operation and Service manual Relocation of the ROBERTS GORDON BLACKHEAT UHA Series after initial installation The use of the ROBERTS GORDON BLACKHEAT UHA Series in a corrosive atmosphere containing contaminants The use of the ROBERTS GORDON BLACKHEAT UHA Series in the vicinity of a combustible or explosive material Any defect in the ROBERTS GORDON BLACKHEAT 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 ROBERTS GORDON BLACKHEAT UHA Series is not installed by a contractor qualified in the installation and service of gas fired heating equipment You 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 The ownership of the ROBERTS GORDON BLACKHEAT UHA Series is moved or transferred This warranty is nontransferable Roberts Gordon is not permitted to inspect the damaged contro
31. abel 91010420 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label 91010426 Manual Reset Switch Label 91010428 For separated combustion units only SECTION 1 HEATER SAFETY Figure 2 UHA 60 75 Label Placement FRONT VIEW BACK VIEW A WARNING A Blackheat VENT TO OUTDOORS DONNER VENT ded Vent to Outdoors Logo Label Label Vent Length Label ACCESS SIDE VIEW OUTSIDE ACCESS SIDE VIEW INSIDE g m 1 WARNING wasi r ES I eS p EI EJ EJ qa Installation Label mas E E pem p pm Instruction Location Label A WARNING A ATTENTION n Manual Reset Venting Arrangement Label Switch Label WARNING AN ATTENTION Rating Plate Label Warning Label
32. arences to combustibles at all times for safety Clearences 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 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 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 17 Figure 9 through Page 20 Figure 14 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 17 Figure 9 through Page 20 Figure 14 6 3 1 Standard Vented Heaters Models UHA X 30 125 The vent must be fitted with a low resistance terminal See Page 17 Figure 9 through Page 17 Figure 10 Standard vented heaters do not allow outdoor air intake for combustion air 6 3 2 Separated Combustion Heaters Models UHA X S 30 125 The heaters ar
33. available from the manufacurer WIL TDI HOCK CLE 7 meam Type B Vent Pipe 18 46 cm Roof Minimum ve Flashing Roof The last section of vent pipe passing _ N Approved through the roof or wall may be Type Thimble B vent pipe All other vent materials If Applicable in the building must be single wall P Nec e Single Wall Pipe vent pipe sE 4 10 cm WD Single Wall Pipe 4 10 cm 7 Area must equal sum Single Wall Pipe of open area of individual vents TOP VIEW 18 SECTION 6 VENTING Figure 12 Separated Combustion Heater Vertical and Horizontal Vent Termination 12 31 cm Minimum from air inlet to vent termination may be horizontal or vertical clearance lt gt U NOTE Vent supports not LZ J shown q 4 10 cm Diameter Air Intake Vertical Option 12 31 cm Listed Thimble through Combustible Wall 4 10 cm Diameter Vent 7 4 40 cm Diameter Air Intake Model Air Intake amp Vent Diameter Part Number UHA X S 30 125 4 10 cm 90502102 Horizontal Figure 13 Concentric Vent Box One o Seal joint between single wall and Type B vent with silicone sealant Combustion Air Option Fori S
34. ce on systems design installation and equipment performance is available through ROBERTS GORDON representatives Please contact us for any further information you may require including the Installation Operation and Service Manual Models 100 400 are not for residential use 2007 Roberts Gordon LLC www rg inc com Printed in U S A P N 91040031 Rev B
35. e 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 6 71 Maximum Vent Lengths Model UHA X S Model UHA XIIS 30 60 75 125 Number of Elbows 25 ft 76 m 40 ft 12 2 m 1 20 ft 6 1 m 35 ft 10 7 m 2 15 ft 4 6 m 30 ft 9 1 m 3 10 ft 3 0 m 25 ft 76 m 4 5 ft 15 m 20 ft 6 1 m 5 6 8 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 14 Section 6 3 If penetrating a combustible wall or roof a listed thimble with 2 B 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 6 9 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 opening
36. e 20 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 or Manual Reset Limit Switch Open 5 Flashes Flame Sense Error Gas valve not energized Steady On Internal Control Failure 34 SECTION 12 SERVICING WARNING Explosion Hazard Installation service and annual inspection must be done by a contractor qualified in the installation and service of gas fired heating equipment or your gas supplier Turn off gas and electrical supplies before performing service or maintenance Failure to follow these instructions can result in death injury or property damage 12 1 Servicing Instructions After start up the heater will require maintenance to be carried out 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 29 Section 10 through Page 32 Section 10 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 38 Section 13 through Page 41 Section 13 5 IMPORTANT Check all gas
37. e 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 19 Figure 12 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 19 Figure 13 and Page 20 Figure 14 For seperated 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 Seperated combustion units may not be common vented See Page 14 Section 6 6 4 Unvented Operation A WARNING Carbon Monoxide Hazard Heaters may be installed vented or unvented Vented heaters must be vented outdoors Unvented heaters must be installed in buildings with ventilation rates as per section 6 4 Failure to follow these instructions can result in death or injury The heater must be vented when installed in residential buildings For unvented operation in commercial installations sufficient ventilation must be provided in the amount of 4 cfm per 1000 Btu h firing rate United States 3 SECTION 6 VENTING cfm per 1000 Btu h firing rate Canada WARNING Combustion by products contain a chemical known to the State of California to cause cancer and birth defects or other reproductive harm 6 5 Horizontal Venting Horizontally
38. e heater 4 Set the thermostat to desired setting above ambient temperature The automatic starting sequence begins TO TURN OFF THE HEATER 1 Turn the thermostat time switch to OFF or lowest setting The burner will turn OFF immediately but fans will continue to cool heat exchanger until the fan thermostat switches off Fire Hazard Some objects can catch fire or explode when placed IF THE HEATER WILL NOT OPERATE TO ENSURE YOUR SAFETY close to heater FOLLOW THESE INSTRUCTIONS TO SHUT DOWN YOUR HEATER Keep all flammable objects liquids and vapors the required clearances to combustibles away from heater 1 Set the thermostat to off or the lowest setting 2 Turn off electric power to the heater 3 Turn off the manual gas valve in the heater supply line Failure to follow these instructions can result in death 4 Call your installer contractor qualified in the installation and service injury or property damage of gas fired heating equipment Installation Clearances Clearances to Combustibles Roof Terminal e Tn P SS Optional separated combustion concentric T venting shown E amp Right 4 Left Wall Terminal Max Mounting Height Models 30 125 Models 150 400 Models 30 125 150 400 Models 30 125 150 400 Top 1 2 5 cm 6 18 cm Top 1 2 5 cm 6 15 cm Bottom 0 0 cm 3 B cm Rear 18 46 cm 24 61 c
39. e 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 7 4 1 Length Requirements Follow the constraints listed on Page 16 Section 6 7 SECTION 7 AiR SUPPLY 21 SECTION 8 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 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 8 1 Connections Connect the heater to the gas supply ensuring that the final connections are as follows Figure 15 Gas Connection Hold gas nipple securely with pipe wrench when attaching the flexible gas connector Do not twist flexible gas connector Ensure all joints are gas tight 22 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Gas supply pipe wo
40. eas 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 21 Section 7 36 Combustion Air Intake Pipe SECTION 12 SERVICING 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 Make sure there are no cracks Make sure there is no sagging bending or distortion Clean or replace as required See Page 22 Section 8 Gas Line and Shut off Valves Check for gas leaks See Page 22 Section 8 Burner Observation Window Make sure it is clean and free of cracks or holes Clean and replace as required Flue Blower Scroll Wheel and Motor Compressed air or a vacuum cleaner may be used to clean dust and dirt Inshot Burners and Orifices Clear 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 29 Section 10 Suspension Points Make sure the heater is hanging securely
41. ed by Roberts Gordon and conform to all requirements set forth in the ROBERTS GORDON manuals and all applicable governmental authorities pertaining to the Explosion Hazard installation service and operation of the equipment Installation service and annual inspection must be done by a contractor qualified in the installation and service of gas fired contractor annually inspect your ROBERTS heating equipment or your gas supplier GORDON equipment and perform service where necessary using only replacement parts sold and Turn off gas and electrical supplies before supplied by Roberts Gordon performing service or maintenance To help facilitate optimum performance and safety Roberts Gordon recommends that a qualified Failure to follow these instructions can result in death injury or property damage 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 6 Section 3 Vent Pipe Terminals Venting must be intact Using a flashlight look for obstructions cracks on the pipe gaps in the sealed ar
42. ent 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 14 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 100 73 standards High temperature silicone sealant must have a minimum temperature rating of 480 F 250 C 6 2 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 6 2 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 6 3 Vent Installation Maintain cle
43. er Compartment 43 6 6 Vertical Venting e u u 16 14 3 Ignition Electrode and Flame Probe 44 6 7 Length Requirements 16 14 4 Heat 45 6 8 Vent Material u u 16 14 5 Louver and Louver Springs 45 6 9 Replacing an Existing Heater in a Venting System 16 14 6 Flue Blower Vertical Installation 46 SECTION 7 Air S ppl ly 21 14 7 Pressure Switch a 47 7 1 Separated Combustion Installation 21 14 8 Ignition Control seen 47 7 2 Unvented Installation a a 21 14 9 Axial Fan Guard Motor Assembly 47 7 3 Building Ventilation 21 14 10 Limit Switches a 48 7 4 Outside Combustion Air 21 SECTION 15 Specifications 49 SECTION 8 Gas Piping 22 15 1 Dimension Data seee 49 8 1
44. er 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 SECTION 11 UsER INSTRUCTIONS SECTION 11 USER INSTRUCTIONS 11 3 Common User Controls 11 3 1 Manual Reset Limit Switch A WARNING Explosion Hazard Do not make more than one attempt to restart the heater if manual reset limit switch locks out The vent or heat exchanger may be blocked The fault must be traced and repaired Failure to follow these instructions can result in death injury or property damage On residentially approved models the limit thermostat is located inside the access door of the heater See Page 44 Section 14 3 This control protects against excessive heat build up inside the burner compartment Figure 19 Manual Reset Limit Switch To reset manual reset limit switch press reset button NOTE To reset the switch must be cool Part Number 90412106 Description Manual Reset Limit Switch 11 4 Lighting Instructions 11 4 1 To Turn On Heater 1 Ensure 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 33 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 2 The auto
45. erms 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 Roberts Gordon any other warranty obligation or liability LIMITATIONS ON AUTHORITY OF REPRESENTATIVES No representative of Roberts Gordon 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 Roberts Gordon s duly authorized Executive Officer 51 SW lt lt ROBERTS GORDON Warm Air Heating OWNER WARRANTY REGISTRATION CARD Mail or Fax to Roberts Gordon LLC 1250 William Street P O Box 44 e Buffalo NY 14240 0044 Phone 716 852 4400 Fax 716 852 0854 Toll Free 800 828 7450 e www rg inc com About the Owner Address City State Zip Code Phone Fax E mail About the Installer Address City State Zip Code Phone Fax E mail Purchased From if different than installer Name Address City State Zip Code Phone Fax E mail About your Heater Model Serial Fuel Installation Date Type of Installation check one 0 Automotive o Manufacturing 0 Warehouse 0 Recreational 0 Aircraft o Public Building 0 Office o Retail o Agricultural o Other Installation Code and Annual Inspections All
46. evated heaters shall be so located in all spaces of aircraft hangars that they shall not be 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 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 BO cm below the floor ceiling assembly or 18 BO cm above the floor n 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 4 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 4 5 Venting The venting must be installed in accordance with the requirements within
47. evels where individuals can come in contact with hot heat exchanger components adequate guarding must be provided UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 4 NATIONAL STANDARDS AND APPLICABLE CODES 4 1 Gas Codes 4 3 Parking Structures and Repair Garages 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 Natual Gas and Propane Installation Code 4 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 n 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 n 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 e Suspended or el
48. hen placed close to heater Keep all flammable objects liquids and vapors the required clearances to combustibles away from heater Failure to follow these instructions can result in death injury or property damage Clearances must be as indicated on Page 7 Figure 4 f clearances to combustibles are not indicated then installation clearances apply 3 6 Ventilation WARNING Carbon Monoxide Hazard Heaters may be installed vented or unvented Vented heaters must be vented outdoors Unvented heaters must be installed in buildings with ventilation rates as per section 6 4 Failure to follow these instructions can result in death or injury 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 14 Section 6 SECTION 3 CRITICAL CONSIDERATIONS 3 7 Gas Supply 3 8 Electrical Supply A WARNING WARNING Fire Hazard Electrical Shock Hazard Connect gas supply according to Figure 15 and gas supply Before Do not use gas supply pipe and electrical connections to support heater s weight This appliance must be connected to a properly grounded electrical source Gas can leak if not installed properly Failure to follow these instructions can result in death or electrical shock Failure to follow these instructions can result in death inju
49. ical compounds characterized by the presence of halogen ele ments 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 out side 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 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 3 2 Manufactured Units Gas fired power vented unit heater with tubular heat exchanger Units shall have a minimum of 8296 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 e Separated Combustion A separated combustion unit shall consist of an enclosed sealed burner box to wh
50. ich combustion air is vented through a piece of internal flexible air duct This duct terminates at an exterior cabinet flange to which a vent ran to the outside of the heated space should be attached 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 a vent box produced of 409 stainless steel 3 3 Location and Suspension 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 using shelf mounting brackets See Page 11 Figure 6 and Page 12 Figure 7 for details May be suspended from above See Page 11 Figure 5 or from wall brackets of sufficient strength to support the heater as listed in the Dimension Data Table on Page 49 Section 15 1 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 3 4 Minimum Required Installation Clearances Clearances around the heater and vent must be as indicated on Page 7 Figure 4 Page 17 Figure 9 through Page 20 Figure 14 to ensure access for servicing and correct operation 3 5 Clearances to Combustibles A WARNING Fire Hazard Some objects can catch fire or explode w
51. ifices E Q9 o Mounting Bracket _ Oo Manifold Remove manifold screws and pull out manifold Unscrew Orifices N SECTION 14 REPLACEMENT PARTS 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 Separated combustion model shown Ensure gas tight fitting of injectors Ensure correct alignment with burners Ensure all pipe joints are gas tight MODEL UHA X S 30 UHA X S 45 UHA X S 60 UHA X S 75 UHA X S 100 UHA X S 125 Orifice Quantity 2 3 4 5 6 7 Natural Gas G20 Orifice Marking 49 49 49 49 46 46 P N 91930049 91930049 91930049 91930049 91930046 91930046 Propane G31 Orifice Marking 56 56 56 1 15 mm 1 25 mm 1 25 mm P N 91930056 91930056 91930056 91930115 91930125 91930125 43 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 14 3 Ignition Electrode and Flame Probe Manual Reset Limit Switch Position may vary omi Limit Switch Burner Compartment Ignition gt Front Views Electrode CE pee Inshot Burners To replace the electrode or flame probe remove
52. ing the gas meter must be inspected tested for gas tightness and purged in accordance with local and national codes Ensure that the air is fully purged from the heater inlet pipe up to the main gas valve inlet test nipple 10 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 these instructions and local regulations 10 2 Begin Start Up 10 2 1 Before Operating the Heater To ensure 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 30 Figure 16 There will be no ignition of the burner and lockout will occur which proves the controls are operating correctly 29 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 16 Automatic Burner Control Sequence Burner Sequence for Ignition Control SHUT DOWN Thermostat 24 V o o 0000 Flue Blower DO e NO lt gt Pressure P Va EEUU LU EU LEUR LLLI LLLI LLL Switch Lil Ignition Spark xj T E Flame Signal LETTERE
53. ion Failure to follow these instructions can result in death or serious injury MODEL UHA X S 30 UHA X S 45 UHA X S 60 UHA X S 75 UHA X S 100 UHA X S 125 Pressure Switch Kit P N 90439801 90439810 90439802 90439810 90439810 90439803 Color Code pink black yellow black black gray Set Point in wc 23 35 32 35 35 41 Pressure Switch Snap Ring P N 90439850 90439850 90439850 90439850 90439850 90439850 14 8 Ignition Control The control mounts to the heat exchanger 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 14 9 Axial Fan Guard Motor Assembly The axial fan unit for the heater is supplied completely assembled and balanced MODEL UHA X S 30 UHA X S 45 UHA X S 60 UHA X S 75 UHA X S 100 UHA X S 125 Axial Fan Guard 91901103 91901103 91901102 91901102 91901102 91901102 Axial Fan Motor 90600104 90600104 90600105 90600105 90600106 90600106 Axial Fan Blade 90709004 90709003 90709002 90709001 90709001 90709001 47 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 14 9 1 Fan Removal and Replacement Remove the mounting hardware hl EN A Ms NE HHI l Description Part Number Quantity
54. ion must be done by a contractor qualified in the installation and service of gas fired heating equipment or your gas supplier Turn off gas and electrical supplies before performing service or maintenance Failure to follow these instructions can result in death injury or property damage Read this manual carefully before installation operation or service of this equipment All components are accessed via the door secured by four sheet metal screws Opening the door exposes live electrical connections and hot components 10 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 10 1 1 Louvers A WARNING Cut Hazard Turn off gas and electrical supply before maintenance Fan can start automatically at any time Failure to follow these instructions can result in severe injury or product damage Where fitted the air delivery louvers need to be set during start up to give the required air distribution optional vertical louvers SECTION 10 OPERATION AND MAINTENANCE 10 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 26 Section 9 5 10 1 3 Gas Supply All aspects of the gas installation includ
55. liance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS Inspection The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless upon inspection the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5 08 2 a 1 through 4 6 6 Vertical Venting Vertically vented heaters can be common vented up to four heaters For vent lengths greater than 5 1 5 m condensation will form Insulation is recommended and condensation drains may be desired Venting through the top of the heater cabinet is not recommended if vent lengths are longer than 10 3 m In this case 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 18 Figure 11 A vent shall not extend less than 2 6m above the highest point where it passes through a flat roof of a building 16 6 7 Length Requirements If using vent lengths greater than 5 1 5 m condensation will form in the vent pip
56. ller and or component parts 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 Roberts Gordon 1250 William Street P O Box 44 Buffalo New York 14240 0044 716 852 4400 On the web at www rg inc com Roberts Gordon 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 Roberts Gordon 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 ROBERTS GORDON BLACKHEAT 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 Roberts Gordon shall not be responsible for failure to perform under the t
57. lude 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 10 3 Complete Start Up Ensure that all covers are fitted correctly and all test points are properly sealed 10 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 and the user instructions on Page 6 Section 3 and Page 33 Section 11 and all warnings defined in this manual 32 A WARNING Explosion Hazard Installation service and annual inspection must be done by a contractor qualified in the installation and service of gas fired heating equipment or your gas supplier Turn off gas and electrical supplies before performing service or maintenance Failure to follow these instructions can result in death injury or property damage 11 1 User Instructions The UHA X S Series heaters are fully automatic and operate from the external controls fitted on site The only user control at the heater is the Manual Reset Limit Switch See Page 33 Section 11 3 1 11 2 Heater Operation When the heater has been switched on by the thermostat installed on site the main burn
58. m Right Max Mounting Height 12 3 7 m 20 6 m 20 6 m 30 9 m E Ts E E m Heaters can be mounted higher if destratification fans are installed See Installation Operation Vent 2 5 cm 2 5 cm and Service Manual for specific mounting height recommendations NOTE Venting directly from top of heater not applicable on Models 150 400 Clearance needed for servicing Roberts Gordon LLC 1250 William Street Telephone 716 852 4400 P O Box 44 Fax 716 852 0854 Buffalo NY 14240 0044 USA Toll Free 800 828 7450 Installation Code and Annual Inspections All installations and service of ROBERTS GORDON equipment must be performed by a contractor qualified in the installation and service of equipment sold and supplied by Roberts Gordon and conform to all requirements set forth in the ROBERTS GORDON manuals and all applicable governmental authorities pertaining to the installation service and operation of the equipment To help facilitate optimum performance and safety Roberts Gordon recommends that a qualified contractor annually inspect your ROBERTS GORDON equipment and perform service where necessary using only replacement parts sold and supplied by Roberts Gordon For installations at elevations above 2000 610 m the appliance shall be derated 4 for each 1000 305 m of elevation above sea level Further Information Applications engineering and detailed guidan
59. m heater performance use only replacement parts sold and supplied by Roberts Gordon Conduct start up procedure as shown on Page 29 Section 10 39 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 13 3 Troubleshooting for Flame Supervision System To measure flame current connect a 0 50 uA DC meter in series with the flame probe If the meter reads negative values then reverse the test leads START Connect a DC ammeter in series with the flame probe Use General Troubleshooting section to trace the fault Is the flame present and at least 1 uA DC flame current Is the connecting lead damaged Is the flame probe damaged or touching earthed components Is there a current flowing in the flame probe circuit with no flame present Repair or replace as Yes required Is inlet burner gas pressure correct Is live and neutral polarity correct Is flame probe circuit correct Does lockout occur when there is a flame present Yes Replace ignition control Repair or replace as required If problems persist contact Roberts Gordon LLC at www rg inc com Heater Operating TROUBLESHOOT ENDS NOTE Minimum flame probe current 1 pA DC Typical flame probe current 3 5 pA DC 40 SECTION 13 TROUBLESHOOTING 13 4 Troubleshooting for Gas Valves START Is gas pressure at inlet of the valve correct for gas ty
60. matic firing sequence will begin as described on Page 30 Figure 16 The heater will now operate automatically under the control of the on site controls 11 4 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 11 5 Simple Troubleshooting Some possible reasons for the heater not operating are Gas supply not ON Electricity supply not ON The time and or temperature controls are not 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 N A 11 5 1 Simple Troubleshooting Burner Faults 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 34 Figure 20 for LED indication codes Figur
61. n Collar appliance connected to the venting system properly vents when tested as outlined 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 Listed Thimble installation and service of gas fired equipment or your local gas supplier If the venting must 2 5 cm Air Gap be resized use appropriate tables in US to Combustible S Appendix G of NFPA 54 ANSI Z223 1 latest Material Vent 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 Figure 10 Standard Vented Heater Vertical and Horizontal Vent Termination NOTE Vent supports not r T Vent Terminal shown Clearance Listed Thimble 4 10cm 2 5 cm Clearance Diameter Vent Vertical Flashing Option Horizontal By Others Option LI S Terminal 12 31 cm Minimum Model Vent Diameter Part Number UHA X 30 125 4 10 cm 90502102 17 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 11 Standard Vented Heater Common Vertical Vent Termination Type B vent cap 7 18 cm or 8 20 cm may be SIDE VIEW used These are not
62. nlet Pressure 5 0 in wc Min 14 in wc Max Burner Pressure in wc 3 7 3 6 3 7 3 5 2 6 3 3 LPG Propane G31 Data Inlet Pressure 12 0 in wc Min 14 in wc Max Burner Pressure in wc 9 4 9 6 9 6 10 0 9 1 10 0 50 SECTION 16 ROBERTS GORDON BLACKHEAT UHA SERIES WARRANTY SECTION 16 ROBERTS GORDON BLACKHEAT UHA SERIES WARRANTY ROBERTS GORDON WILL PAY FOR Within 24 months from date of purchase by buyer or 27 months from the date of shipment by Roberts Gordon 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 Roberts Gordon will require the part in question to be returned to the factory Roberts Gordon will at its sole discretion repair or replace after determining the nature of the defect and disposition of part in question ROBERTS GORDON Replacement Parts are warranted for a period of 18 months from date of shipment from Roberts Gordon or the remaining ROBERTS GORDON BLACKHEAT UHA Series warranty ROBERTS GORDON 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 ROBERTS GORDON BLACKHEAT UHA Series any way Use of the ROBERTS GORDON BLACKHEAT
63. nsion 12 Figure 8 Vertical Louvers 13 Figure 9 Vent and Roof 17 Figure 10 Standard Vented Heater Vertical and Horizontal Vent Termination 17 Figure 11 Standard Vented Heater Common Vertical Vent 18 Figure 12 Separated Combustion Heater Vertical and Horizontal Vent Termination 19 Figure 13 Concentric Vent 19 Figure 14 Concentric Vertical and Horizontal Vent Termination Separated Combustion Heater 20 Figure 15 Gas Connection sse 22 Figure 16 Automatic Burner Control Sequence 30 Figure 17 Gas Valve for Models UHA X S 30 45 30 Figure 18 Gas Valve for Models UHA X S 60 125 31 Figure 19 Manual Reset Limit Switch 33 Figure 20 LED Diagnostic Codes 34 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 annual inspection of heater must be done
64. o construct mounting bracket assembly only 12 Figure 8 Vertical Louvers Optional Remove horizontal louvers aqu ush in louver and compress spring to remo opposite SECTION 5 MAJOR COMPONENTS Install vertical louvers brackets top and bottom with supplied screws Install vertical louvers and springs into brackets with springs at top Description Part Number Description Part Number Vertical Louver Kit UHA X S 30 amp UHA X S 45 12011003K Vertical Louver Kit UHA X S 60 amp 5 75 12011005 Vertical Louver Bracket 11111903 Vertical Louver Bracket 11111903 10 Screw 94311008 10 Screw 94311008 UHA X S 30 45 Vertical Louvers 11111901 Instruction Sheet 91040036 Louver Spring 90901200 Instruction Sheet 91040036 Description Part Number Vertical Louver Kit UHA X S 100 amp UHA X S 125 12011004K Vertical Louver Bracket 11111903 10 Screw 94311008 5 100 125 Vertical Louvers 11111902 Instruction Sheet 91040036 For models UHA X S 60 and UHA X S 75 horizontal louvers are re used 13 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 6 VENTING A WARNING Carbon Monoxide Hazard Heaters may be installed vented or unvented Vented heaters must
65. pe 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 13 5 Troubleshooting for Flue Blower START Does flue blower run Correct power automatically when there No supply problem is a call for heat Blower motor faulty Replace with correct type Does blower turn on and off while burner is firing Yes Check blower motor leads continuously for loose connections If problems persist contact Roberts Gordon LLC at www rg inc com Blower Operating TROUBLESHOOT ENDS No 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 Roberts Gordon LLC at www rg inc com For optimum heater performance use only replacement parts sold and supplied by Roberts Gordon Conduct start up procedure as shown on Page 29 Section 10 41 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 14 REPLACEMENT PARTS 14 1 Gas Valve Remove the gas supply pipe at the heater inlet AWARN NG Follow steps in Section 14 2 and Section 14 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
66. 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 12 2 Burner Maintenance 1 Open the door and remove the burner compartment cover See Page 43 Section 14 2 2 Clean any deposits from the main burner which may have formed in the injectors or venturi of the burner See Page 43 Section 14 2 SECTION 12 SERVICING 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 insulators Replace as required 12 3 Fan Motor Assembly Maintenance WARNING Cut Hazard Turn off gas and electrical supply before maintenance Fan can start automatically at any time Failure to follow these instructions can result in severe injury or product damage 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 12 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
67. rect 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 9 1 1 Fan Control The heater s axial fan can be used during the off season for air circulation A low voltage programmable thermostat with a fan switch P N 90425400 must be See Page 23 Section 9 2 used For thermostat connection details For the use of multiple heaters on one thermostat See Page 24 Section 9 3 through Page 25 Section 9 4 Electrical Supply 24 Volt Thermostat Heating Only to CRD D 24 Volt Thermostat with Fan Control MIGR JG wS x S SS NS cS 23 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 9 3 Low Voltage Thermostat with Multiple Heaters 30 45 Transformer FRONT VIEW BACK VIEW Relay mic nicus cA Low Voltage Thermostat 1 3h COIL COIL so White Heater 2 120V 60 Hz supply circuit Li ___ 2 Gnd Healer 4 NOTE If both the heat and fan only opera
68. rk is run in medium or heavy gauge tubing in compliance with local and national codes Meter and service must be large enough to 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 purged 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 or 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 Do not bend flexible gas connector sharply Option A Stainless Steel Flexible
69. ry or property damage A permanent 120 V 1 60 Hz electrical supply is required for the main electrical power The heater It is important that the gas supply pipe is sized also requires suitable controls in accordance with correctly to provide the inlet pressure as stated See Page 23 Section 9 the heater data plate The gas supply pipe and electrical connections must not support any of the 3 9 Vent heater s weight See Page 22 Section 8 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 connected to the vent See Page 14 Section 6 Figure 4 Installation Clearances and Clearances to Combustibles Installation Clearances Clearances to Combustibles Roof T aN Optional separated combustion concentric venting shown 18 gt 10 8 m 45 7 cm EN s adequate Terminal 12 3 7 m 20 6 m Max Mounting Height i Clearance to Vent 2 5 cm Recommended mounting height varies with heater input Heaters may be mounted at a higher level if destratification 18 45 7 cm minimum is fans are installed 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 l
70. s 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 SECTION 6 VENTING are located and other spaces of the building must be in accordance with the appropriate Turn on clothes dryers and any exhaust fans local codes and the NFPA 54 ANSI Z223 1 such as range hoods and bathroom exhausts latest revision National Fuel Gas Code US or so that they shall operate at maximum speed Standard CSA B149 1 Natural Gas and Do not operate a summer exhaust fan Close Propane Installation Code Canada fireplace dampers 4 Follow the lighting instructions Place the Figure 9 Vent and Roof Detail appliance being inspected in operation Adjust 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 Vent relief opening after 5 minutes of main burner Terminal operation Use the flame of a match or candle 6 After it has been determined that each Flashing or Rai
71. 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 Description Part Number Qty Spark Electrode 90427411 Automatic Ignition Flame Probe 90439300 Transformer 90436900K Ignition Module 90434008 Inshot Burners UHA X S 30 92000002 Inshot Burners UHA X S 45 92000002 Inshot Burners UHA X S 60 92000002 Inshot Burners UHA X S 75 92000002 Inshot Burners UHA X S 100 92000002 Inshot Burners UHA X S 125 92000002 Limit Switch 90412104 Manual Reset Limit Switch 90412106 Ni o ol gt l po a 44 14 4 Heat Exchanger SECTION 14 REPLACEMENT PARTS The heat exchanger consists of a four 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 galvannealed steel 409 stainless steel 14 5 Louver and Louver Springs Horizontal Louvers Dp 4 Push in Louver and compress spring to re For models UHA X S 60 and UHA X S 75 horizontal louvers are re used Vertical Louvers Install Vertical Louver Brackets top and bottom with supplied Screws Install Vertical Louvers and Springs into Brackets with Springs at Top Description 30 45 UHA X S 5 60 75 UHA X S
72. this manual and the following codes 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 4 6 High Altitude These heaters are CSA approved without modifications for installations up to 2000 610 m in US and Canada CSA approved 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 CSA approved and must be approved by the local or provincial authority SECTION 4 NATIONAL STANDARDS AND APPLICABLE CODES UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 5 MAJOR COMPONENTS 5 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 accordance with clearances to comb
73. tions are to be used two relays will be required per group of heaters Model Relay Type Relay Part Number Max Number of Heaters 5 30 45 SPST 90417600 4 24 SECTION 9 WiRING 9 4 Low Voltage Thermostat with Multiple Heaters 60 125 Transformer FRONT VIEW BACK VIEW Relay i E mn mn Uc mS Low Voltage Thermostat ACS 2 enu COIL s COIL UJ Purple Black 120V 60 Hz supply circuit 1 4 L2 lt Gnd lt NOTE If both the heat and fan only operations are to be used two relays will be required per group of heaters Model Relay Type Relay Part Number Max Number of Heaters UHA X S 60 125 DPST 90436300 4 25 UHA Low PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 9 5 Internal Wiring Diagram AXIAL FAN 300 1350 400 ONLY AXIAL FAN BLOWER PRESSURE SWITCH Orange MANUAL RESET LIMIT SWITCH IGNITION UHA 30 125 ONLY SWITCH SENSE Black ELECTRODE Black IMPORTANT 5 in l 1 1 24 THERMOSTAT RED MANUAL FAN INPUT FROM THERMOS
74. ustibles as indicated on the wall tag and this manual 5 2 Shelf Mounting and Suspension A WARNING Crush Hazard Use 3 8 threaded rod minimum Failure to follow these instructions can result in death injury or property damage Four suspension points 3 8 nuts are located on the top of the heater Drop rods must be 3 8 diameter mild steel When handling or supporting the heater from below ensure that the weight is taken at the support points For typical suspension See Page 11 Figure 5 For typical shelf mounting on existing shelf See Page 11 Figure 6 5 3 Wall Mounting For typical suspension See Page 12 Figure 7 Wall mounted heaters blowing parallel to the wall can only be installed with the service door away from the wall The wall mounting brackets must be attached to a suitable wall using all mounting holes Screw sizes less than 3 8 may not be used In order for the wall mounting brackets to adequately carry the weight of the heater it must be installed according to best building practices 10 SECTION 5 MAJOR COMPONENTS Figure 5 Suspension Methods E Ensure all suspension 7 Sis hardware is torqued to Unistii Channel a minimum of 20 ft Ibs Nut Washer Sl 7 Nut 3 3 8 Threaded Rod jg Threaded 7 Support Points Cone Point Set Pin Window Clamp Description
75. vice 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 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 91040031 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 2 2 Corrosive Chemicals Caution Do not use heater in an area containing corrosive chemicals Avoid the use of corrosive chemicals to ensure a longer life of the burner heat exchanger and other parts Roberts Gordon 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 SECTION 1 HEATER SAFETY of combustible materials corrosive chemicals or halogenated hydrocarbons anywhere in the premises Halogenated Hydrocarbons are a family of chem

Roberts Gorden Blackheat UHA-Series 100 User's Manual

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