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Roberts Gorden UHA SERIES 150 User's Manual

1. 12 7 7 Vent Material 13 7 8 Replacing an Existing Heater in a Venting System 13 SECTION 8 Air SUPplV snsnnornnntes 18 8 1 Separated Combustion Installation 18 8 2 Unvented Installation 18 8 3 Building Ventilation 18 8 4 Outside Combustion Air Supply 18 SECTION 9 Gas PIping eennnns 19 9 1 Connections 19 SECTION 10 Wiring eennns 21 10 1 Positioning Thermostats 21 10 2 Low Voltage Thermostat with One Heater 21 10 3 Low Voltage Thermostat with Multiple Heaters Models UHA X S 150 250 22 10 4 Low Voltage Thermostat with Multiple Heaters Models UHA X S 300 400 23 10 5 UHA X S Series Internal Wiring Diagram 24 10 6 UHA X S Series Ladder Wiring Diagram 25 10 7 Electrical Connection to the Heater 26 SECTION 11 Operation and Maintenance 11 1 Pre Start Up Checks ssseeseeseeneeneeerenesenrnnnrennsenne 11 2 Begin Start Up 11 3 Complete the Start Up SECTION 12 User Instructions 12 1 Heater Operation 12 2 Lighting Instructions 12 3 Simple Troubleshooting nennen SECTION 13 Servicing nns 13 1 Servicing Instructions 13 2 Burner Maintenance 13 3 Fan Motor Assembly Mainten
2. 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 o Automotive o Manufacturing o Warehouse o Recreational o Aircraft o Public Building o Office o Retail o Agricultural o Other Installation Code and Annual Inspections All installation 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 LLC and conform to all requirements set forth in the ROBERTS GORDON manuals and all applicable governmental authorities pertaining to the installation service operation and labeling of the equipment To help facilitate optimum performance and safety Roberts Gordon LLC recommends that a qualified contractor conduct at a minimum annual inspections of your ROBERTS GORDON equipment and perform service where necessary using only replacement parts sold and supplied by Roberts Gordon LLC Further Information Applications engineering and detailed guidance 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
3. Description UHA X S 150 175 UHA X S 200 250 UHA X S 300 400 Horizontal Louvers P N 11011847 11011847 11011846 Spring P N 91901200 91901200 91901200 Quantity 7 9 11 Pushin Louver and compress spfing to The louvers for standard range models UHA X S 150 UHA X S 400 are only available in horizontal configurations 43 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 15 6 Flue Blower Remove screws securing outlet flange to the flue adapter Flue Adapter to Flue Blower Refit in reverse order m Rear Panel Vent Box t a Outlet Adapter Gasket Flue Blower Disconnect electrical connections at plug in tabs Remove screws securing flue blower mounting plate to vent Mounting box gP Plate AS Mounting Plate Remove screws securing Gasket to Vent Box mounting plate to blower a screws 7 Gasket Refit in reverse OU ug i a Use new gaskets screws Ensure sealed joints Ensure mounting plate orifice is clear and not obstructed UHAIXIISI UHA XIIS UHAIXIISI MODEL 150 175 200 300 350 400 Flue Blower P N 90710405 90710403 90710402 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 Se
4. 10 2 Low Voltage Thermostat with One Heater SECTION 10 WIRING Heater must be wired and electrically grounded in accordance with local codes In the absence of local codes in accordance with United States refer to National Electrical Code NFPA 70 latest revision Canada refer to Canadian Electrical Code CSA C22 1 Part latest revision 10 1 Positioning Thermostats A room thermostat should be mounted on a vibration free wall or column at a height of approximately 5 1 5 m from the floor to measure the ambient temperature It should be clear of both cold drafts and the direct path of warm air from the heater Avoid mounting thermostat on outside walls or in areas directly exposed to radiant heat or sunlight Install wall tag in a visible location near thermostat See Page 5 Section 2 1 for wall tag details 10 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 fan switch P N 90425400 must be used See Page 21 Section 10 2 for thermostat connection details For the use of multiple heaters on one thermostat See Page 22 Section 10 3 through Page 23 Section 10 4 24 Volt Thermostat 24 Volt Thermostat with Fan Control Electrical Supply Heating Only e id QD Electrical Supply Terminal Strip Terminal Strip Gas Supply 21 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERA
5. Figure 8 Standard Vented Heater Common Vertical Vent Termination SIDE VIEW Type B vent cap 7 18 cm or 8 20 cm may be used These are not available from the manufacurer 2 6 m EL ER EN e B Vent Pipe E Roof Flashing N Roof The last section of vent pipe passing __ gt through the roof or wall may be Type B vent pipe All other vent materials in the building must be single wall vent pipe a 4 10 cm FD Single Wall Pipe TOP VIEW Requirements e Maximum of four heaters can be commonly vented through the roof e Heaters must be of the same BTU output e Heaters must be controlled by a common thermostat e Connections to a common stack must be positioned to avoid direct opposition between streams of combustion gases N D Area must equal sum Su Approved Thimble If Applicable Single Wall Pipe a 4 10 cm Single Wall Pipe of open area of individual vents 15 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 9 Separated Combustion Heater Vertical and Horizontal Vent Termination 12 31 cm Minimum from air inlet to vent gt termination gt gt LE L lt 2 Air Intake __ Vertical Option gt 12 31 cm Minimum from roof to vent termination
6. EZ m KE Vent Horizontal 12 31 cm Option Minimum from air inlet to vent termination A Air Intake Air Intake Termination pe Vent Termination 12 31 cm Minimum from wall to vent termination Model Vent Diameter Part Number UHAIXIS 150 400 4 10 cm 90502102 Model Air Intake Diameter Part Number UHAIXIS 150 250 4 10 cm 90502102 UHAIXIS 300 400 5 13 cm 90502105 Listed Thimble through Combustible Wall N NOTE Vent supports not shown Figure 10 Concentric Vent Box 4 10 cm or 5 13 cm Seal joint between single wall and Type B vent with silicone sealant Combustion Air to Heater Toward Outside 6 15 cm or 8 20 cm Single Wall Inlet Air Pipe Concentric By Others Vent Box Exhaust from Heater 16 of 51 Use 3 sheetmetal screws equally spaced around joint 4 10 cm Single Wall Vent Pipe By Others Use 3 sheetmetal screws equally spaced around collar SECTION 7 VENTING Figure 11 Concentric Vertical and Horizontal Vent Termination Separated Combustion Heater Vent Terminal with Baffle Plate 4 10 cm _ Type B 1Vent UHAS 150 250 6 15 cm Diameter Single Wall UHAS 300 400 m SR 8 20 cm Diameter CS Single Wall N Combustion Air Terminal Flashing By Others Vent Box N Air Intake Ve
7. 161 0 170 1 170 1 Do not exceed the maximum length of flue stated or heater may not operate properly 16 3 Technical Data Table Model UHA X S UHA X S UHA X S UHA X S UHA X S UHA X S lUHA X S UHA X S 150 175 200 225 250 300 350 400 Total Input Btu h x 1000 150 175 200 225 250 300 350 385 Total Output Btu h x 1000 123 143 5 164 184 5 205 246 287 315 7 Efficiency 82 82 82 82 82 82 82 82 Natural Gas G20 Data Inlet Pressure 5 0 in wc Min 14 in wc Max Burner Pressure in wc 3 2 3 4 3 7 3 7 4 0 2 7 2 7 3 3 LPG Propane G31 Data Inlet Pressure 12 0 in wc Min 14 in wc Max Burner Pressure in wc 9 9 10 4 10 5 10 7 10 5 9 4 9 3 11 1 48 of 51 SECTION 17 THE ROBERTS GORDON COMBAT UHA SERIES WARRANTY SECTION 17 THE ROBERTS GORDON COMBAT UHA SERIES WARRANTY ROBERTS GORDON LLC WILL PAY FOR Within 24 months from date of purchase by buyer or 27 months from date of shipment by Roberts Gordon LLC 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 LLC will require the part in question to be returned to the factory Roberts Gordon LLC 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
8. Maintain clearances to combustibles at all times for safety SECTION 4 CLEARANCES TO COMBUSTIBLES Clearances for all heater models are located on the serial plate of the heater and throughout the manual Check the clearances on the serial plate to make sure the product is suitable for your application and the clearances are maintained Read and follow the safety guidelines below Keep gasoline or other combustible material including flammable objects liquids dust or vapors away from this heater or any other appliance e The stated clearances to combustibles represents a surface temperature of 90 F 50 C above room temperature Building materials with a low heat tolerance such as plastics vinyl siding canvas tri ply etc may be subject to degradation at lower temperatures It is the installer s responsibility to assure that adjacent materials are protected from degradation e Consult local Fire Marshal Fire Insurance Carrier or other authorities for approval of proposed installation when there is a possibility of exposure to combustible airborne materials or vapors 4 2 Clearances To Combustibles Clearances must be as indicated on Page 7 Figure 4 If clearances to combustibles are not indicated then installation clearances apply Figure 4 Installation Clearances and Clearances to Combustibles Installation Clearances PP Roof Terminal Optional separated venting shown Top i
9. 250 UHA X S 300 400 Axial Fan Guard 91901104 91901104 91901105 Axial Fan Motor 90600107 90600107 90600106 Axial Fan Blade 90709006 90709006 90709005 45 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 15 9 1 Fan Removal and Replacement 15 10 Limit Switches IN WAR N N G 15 10 1 Removal and deal 1 Remove the electrical connections to the switch 2 Unscrew the two screws securing the switch 3 Fita new switch with two screws 4 Reconnect the electrical connections and test operation Severe Injury Hazard Turn off gas and electrical supply before service Fan can start automatically at any time Failure to follow these instructions can result in severe injury or product damage Remove the screws and washers Description Part Number Qty Axial Fan UHA X S 150 175 90710417 1 Axial Fan UHA X S 200 250 90710417 1 Axial Fan UHA X S 300 400 90710416 2 For units built after July 2011 For units built before July 2011 P N 90710416 15 9 2 To Replace the Fan Assembly To replace the fan assembly reverse the procedure shown above e 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 24 Section 10 5 wiring diagram e Use only genuine replacement parts sold and supplied by Roberts Gordon LLC 46 of 51 SECTION 16 SPECI
10. 3 Flashes Airflow Fault Pressure switch open or closed 4 Flashes Temperature Limit Switch Open 5 Flashes Flame Sense Error Gas valve not energized Steady On Internal Control Failure 31 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 13 SERVICING ADANGER Electrical Shock Hazard Explosion Hazard Turn off gas supply to Di nnect electri SCONE eee heater before service before service Heater must be connected to a propery grounded electrica source A WARNING Cut Pinch Hazard Wear protective gear during installation operation and service Tubing may still be hot after operation Burn Hazard Allow heater to cool before service Edges are sharp Failure to follow these instructions can result in death electric shock injury or property damage 13 1 Servicing Instructions After start up the heater will require maintenance to be carried out at a minimum annually If the heater is used in a dirty or dusty area more frequent maintenance may be required IMPORTANT After any maintenance or repair work always test fire the heater in accordance with the start up instructions on Page 27 Section 11 through Page 30 Section 11 3 1 to ensure all safety systems are in working order before leaving the heater to operate Minor faults may be traced by using the troubleshooting charts on Page 35 Section 14 through Page 39 Section 14 5 IMPORTANT Check al
11. ROBERTS GORDON equipment must be performed by a contractor qualified in the installation and service of equipment sold and supplied by Roberts Gordon LLC and conform to all requirements set forth in the ROBERTS GORDON manuals and all applicable governmental authorities pertaining to the installation service operation and labeling of the equipment To help facilitate optimum performance and safety Roberts Gordon LLC recommends that a qualified contractor conduct at a minimum annual inspections of your ROBERTS GORDON equipment and perform service where necessary using only replacement parts sold and supplied by Roberts Gordon LLC For installation at elevations above 2000 610m the appliance shall be derated 4 for each 1000 305m of elevation above sea level Further Information Applications engineering and detailed guidance 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 These products are not approved for residential use except for models UHA S 30 UHA S 75 2012 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 witho
12. These products are not for residential use O 2012 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 ROBERTSGORDON 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 the 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 Keep all flammable objects liquids and vapors the minimum required clearances to combustibles away IF THE HEATER WILL NOT OPERATE TO ENSURE YOUR SAFETY from heater FOLLOW THESE INSTRUCTIONS TO SHUT DOWN YOUR HEATER Some objects will catch fire or explode when placed 1 Set the thermostat to off or the lowest setting close t
13. Turning Off the Heater Set the thermostat to the OFF position or lowest setting and the main burner will stop The fan will continue to run until it is stopped automatically by the fan thermostat Do not use a disconnect switch for control of heater Disconnect switch will turn off the fan Heat exchanger could be damaged Warranty will not cover damage to the heat exchanger if operated improperly Only use the disconnect switch for turning off heater for service or during off season 29 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 11 2 5 External Controls External controls may include time switch interlock switch room thermostat and frost thermostat Operate each control to ensure that they function correctly Set the switches if fitted and thermostat s to the users requirements 11 3 Complete the Start Up Ensure that all covers are fitted correctly and all test points are properly sealed 11 3 1 Instruction to the User Explain the controls of the heater to the user including how to turn it on and off using the controls fitted on site Give this manual to the user Ensure that the user is shown and understands the importance of maintaining clearances to combustibles on Page 7 Figure 4 installer responsibility on Page 6 Section 3 and user instructions on Page 31 Section 12 and all warnings defined in this manual 30 of 51 SECTION 12 USER INSTRUCTIONS ADANGER Electrica
14. by the 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 1 3 California Proposition 65 In accordance with California Proposition 65 requirements a warning label must be placed in a highly visible location on the outside of the equipment i e near equipment s serial plate See label placement drawing on Page 2 Figure 1 through Page 4 Figure 3 for label location Avoid placing label on areas with extreme heat cold corrosive chemicals or other elements To order additional labels please contact Roberts Gordon LLC or your ROBERTS GORDON independent distributor 1 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 1 UHA X S 150 175 Label Placement FRONT VIEW BACK VIEW A WARNING Cut zara VENT TO OUTDOORS I f RE 3 Nees od sax E DONNER VENT 0 M 1 ROBERTS GORDON fa Vent to Outdoors Label Logo Label Rating Plate Label Vent Length Label ACCESS SIDE VIEW INSIDE Lighting Instructions Label Proposition 65 Label Venting Arrangement Label Installation Label Instruction L
15. for limit switch to cool Does fan stop running Does axial fan run immediately upon supplying Yes power to heater 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 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 36 of 51 SECTION 14 TROUBLESHOOTING 14 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 Is ignition control showing a 4 fl
16. m above grade where located adjacent to public walkways Vent terminal must be installed at a height sufficient to prevent blockage by snow and building materials protected from degradation by flue gasses Vent terminal must be beyond any combustible overhang Secure all joints with corrosion resistant 8 x 3 8 sheet metal screws For single wall venting pressure sensitive aluminum tape or silicone sealant must be used to seal all joints Aluminum tape shall have a minimum temperature rating of 400 F 204 C and meet SMACNA AFTS SECTION 7 VENTING 100 73 standards High temperature silicone sealant must have a minimum temperature rating of 480 F 250 C 7 1 1 United States Requirements Vent must terminate at least 3 9 m above any forced air inlet located within 10 3 1 m Vent must terminate at least 4 1 2 m below 4 1 2 m horizontally from or 1 3 m above any door operable window or gravity air inlet into any building NFPA 54 ANSI Z223 1 latest revision National Fuel Gas Code specifies a 4 1 2 m horizontal vent terminal clearance from gas and electric meters regulators and relief equipment 7 1 2 Canadian Requirements The vent shall not terminate within 6 1 8 m of a mechanical air supply inlet to any building The vent shall not terminate within 3 9 m of a window or door that can be opened in any building any non mechanical air supply inlet to any building or of the
17. operate the heater for the first time with the isolating gas valve turned off and power supply turned on 1 Turn off the isolating gas valve 2 Turn up the thermostat above room temperature The automatic ignition sequence will now begin as described on Page 28 Figure 13 There will be no ignition of the burner and lockout will occur which proves the controls are operating correctly Figure 13 Automatic Burner Control Sequence Burner Sequence for Ignition Control SHUT DOWN Thermostat 24 Woo MT TT Flue Blower Po eNO gt UT Pressure P CAT Switch L NC Ignition Spark OL Start Gas Valve a Flame Signal El AMOO T 30 Seconds Delay A 90 Seconds Delay gt Axial Fan ts 10 Seconds Purge time begins at pressure switch change over Required Incoming Signals AI M D Signals Output By Control hee ee 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 28 of 51 SECTION 11 OPERATION AND MAINTENANCE Figure 14 Gas Valve for Models UHA X S 150 400 END VIEW Gas Inlet Inlet Pressure 11 2 2 Start Up the Gas Valve All Gases 11 2 2 1 Check Burner Gas Pressure 1 Remove the plug in the outlet burner pressure
18. optimum performance and safety Roberts Gordon LLC recommends that a qualified contractor conduct at a minimum annual inspections of your ROBERTS GORDON equipment and perform service where necessary using only replacement parts sold and supplied by Roberts Gordon LLC Annual Fall Start Up operation Follow entire start up procedure at this time and check control settings and The Vicinity of the Heater Do not store or use flammable objects liquids or vapors near the heater Immediately remove these items if they are present See Page 6 Section 3 Vehicles and Other Objects Maintain the clearances to combustibles Do not hang anything from or place anything on the heater Make sure nothing is lodged in between the heat exchanger or in the louvers Immediately remove objects in violation of the clearances to combustibles See Page 7 Section 4 Vent Pipe Terminals Venting must be intact Using a flashlight look for obstructions cracks on the pipe gaps in the sealed areas or corrosion The area must be free of dirt and dust Remove any carbon deposits or scale using a wire brush If the vent terminal has a screen built in remove any dirt dust or deposits from the screen See Page 18 Section 8 Cabinet Exterior After installation touch up scratches Periodic paintings should be done thereafter as required Warning labels and logo labels should be legible and accurate Please con
19. test point and connect a pressure tapand a manometer 2 With the burner firing measure the pressure on the manometer To adjust the burner pressure remove the regulator cover from the valve and turn the regulator adjustment screw to set the required burner pressure as stated in the Technical Data Table for the correct gas and model on Page 49 Section 16 3 NOTE If the correct burner pressure cannot be reached then check the inlet pressure to the valve with the burner firing See Technical Data Table on Page 49 Section 16 3 for inlet pressure requirement Do not continue to adjust the regulator if the pressure is not changing If the inlet pressure is too low to allow correct burner pressure setting then the gas inlet pressure must be corrected before completing the start up TOP VIEW Outlet Pressure Part Number 90032505 90032506 90032520 90032521 Description Gas Valve 150 Gas Valve 150 Gas Valve 300 Gas Valve 300 Check Gas Rate 1 After burner pressure adjustment allow the heater to operate for at least 15 minutes and then re check settings Adjust pressure setting if necessary 2 Check gas flow rate at gas meter 3 Turn off heater and electrical supply 4 Remove the manometer and refit all covers to the valve and tighten the screw of the outlet pressure tap 11 2 3 Pressure Switch The pressure switch is factory pre set for each model and is not adjustable 11 2 4
20. valve turns on Does gas pressure at outlet of valve return to zero or lower when valve turns off Valve Operating TROUBLESHOOT ENDS 14 5 Troubleshooting for Flue Blower START Does flue blower run automatically when there No is a call for heat Correct power supply problem Blower motor faulty Replace with correct type Does blower turn on and off while burner is firing Yes continuously Check blower motor leads for loose connections If problems persist contact Roberts Gordon LLC at www rg inc com Blower Operating TROUBLESHOOT ENDS NO SECTION 14 TROUBLESHOOTING 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 your safety and optimum heater performance use only genuine replacement parts sold and supplied by Roberts Gordon LLC Conduct start up procedure as shown on Page 27 Section 11 39 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 15 REPLACEMENT PARTS ADANGER A WARNING Electrical Shock Hazard Explosion Hazard Fire Hazard Carbon Monoxide Hazard Use only genuine ROBERTS GORDON replacement parts per this installation operation and service manual Failure to follow these instructions can result in death electric shock injury or property damage
21. 00 250 Label Placement 3 Figure 3 UHA X S 300 400 Label Placement 4 Figure 4 Installation Clearances and Clearances to Combustibles ss E eier 7 Figure 5 Suspension Methods 10 Figure 6 Vent and Roof Detail 13 Figure 7 Standard Vented Heater Vertical and Horizontal Vent Termination 14 Figure 8 Standard Vented Heater Common Vertical Vent Termination civic iii 15 Figure 9 Separated Combustion Heater Vertical and Horizontal Vent Termination 16 Figure 10 Concentric Vent Box 16 Figure 11 Concentric Vertical and Horizontal Vent Termination Separated Combustion Heater 17 Figure 12 Gas Connection 20 Figure 13 Automatic Burner Control Sequence 28 Figure 14 Gas Valve for Models UHA X S 150 400 29 Figure 15 LED Diagnostic Codes 31 SECTION 1 HEATER SAFETY Your Safety is Important to Us This symbol is used throughout the manual to notify you of possible fire electrical or burn hazards Please pay special attention when reading and following the warnings in these sections Installation service and at a minimum annual inspection of heater must be done by a contractor qualified in the installation and service of gas fired heating equipment Read this manual carefully before installation operat
22. 49 3 49 3 49 3 49 3 49 3 F in 30 0 30 0 32 0 32 0 32 0 30 0 30 0 30 0 cm 76 2 76 2 81 3 81 3 81 3 76 2 76 2 76 2 G in 6 0 6 0 6 0 6 0 6 0 70 70 70 cm 15 2 15 2 15 2 15 2 15 2 17 8 17 8 17 8 H in 8 6 8 6 8 3 8 3 8 3 11 2 11 2 11 2 cm 21 8 21 8 21 1 21 1 21 1 28 4 28 4 28 4 J in 15 3 15 3 172 172 172 13 8 13 8 13 8 cm 38 9 38 9 43 7 43 7 43 7 35 1 35 1 35 1 K in 3 4 3 4 3 4 3 4 3 4 6 2 6 2 6 2 cm 8 6 8 6 8 6 8 6 8 6 15 7 15 7 15 7 L in 5 9 5 9 5 9 5 9 5 9 8 7 8 7 8 7 cm 15 0 15 0 15 0 15 0 15 0 22 1 22 1 22 1 M in 2 4 2 4 2 4 2 4 2 4 2 4 2 4 2 4 cm 6 1 6 1 6 1 6 1 6 1 6 1 6 1 6 1 N in 6 5 6 5 6 5 6 5 6 5 6 5 6 5 6 5 cm 16 5 16 5 16 5 16 5 16 5 16 5 16 5 16 5 16 2 General Technical Data Table Model UHA X S UHA X S UHA X S UHA X S UHA X S UHA X S UHA X S UHA XI S 150 175 200 225 250 300 350 400 Full Load Amps 120 V A 10 6 10 6 10 6 10 6 10 6 11 6 11 6 11 6 Air Volume CFM 3500 3500 3716 3716 3716 4663 4663 4663 Flue and Air Intake Flue Intake Size in cm 4 10 4 10 4 10 4 10 4 10 4 10 4 10 4 10 Air Intake Size in cm 4 10 4 10 4 10 4 10 4 10 5 13 5 13 5 18 Maximum Straight Flue Air Intake ft m 40 1 40 1 40 1 40 1 40 1 40 1 40 1 40 1 lbs 217 237 255 265 270 355 375 375 Weight Net kg 98 4 107 5 115 7 120 2 122 5
23. FICATIONS 16 1 Dimension Data SECTION 16 SPECIFICATIONS TOP VIEW Heater must be supported at these points from above or below gt v y ry o E y y y o o REAR VIEW A Air Intake UHAIXIS only J m JR Y ge Flue Gas Supply Thermostat Connection on Oo Electrical N __ eo Supply m K L A 4 x 3 8 Captive Nuts Provided SIDE VIEW 47 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Model UHA X S UHA X S UHA X S UHA X S UHA X S UHA X S UHA X S UHA X S 150 175 200 225 250 300 350 400 A in 42 4 42 4 42 4 42 4 42 4 52 3 52 3 52 3 cm 107 7 107 7 107 7 107 7 107 7 132 8 132 8 132 8 B in 26 7 26 7 35 0 35 0 35 0 43 2 43 2 43 2 cm 67 8 67 8 88 9 88 9 88 9 109 7 109 7 109 7 c in 25 5 25 5 25 5 25 5 25 5 25 5 25 5 25 5 cm 64 8 64 8 64 8 64 8 64 8 64 8 64 8 64 8 D in 176 176 176 176 176 24 7 24 7 24 7 cm 44 7 44 7 44 7 44 7 44 7 62 7 62 7 62 7 E in 19 4 19 4 19 4 19 4 19 4 19 4 19 4 19 4 cm 49 3 49 3 49 3
24. 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 Extinguish any open flame 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 A WARNING Fire Hazard Keep all flammable objects liquids and vapors the minimum required clear ances to combustibles away from heater Some objects will catch fire or explode when placed close to heater Failure to follow these instructions can result in death injury or property damage 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 O C US Energy Verified O 2012 Roberts Gordon LLC SS o BS ROBERTS GORDON RX N Lombal UHA Series Tubular Unit Heaters Standard Range Installation Operation amp Service Manual Models UHA X S 150 175 200 225 250 300 350 400 2 825 gt gt Bees 222 222 q BE 2 B 5 Installer Please take the time to
25. G or larger wires 25 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 10 7 Electrical Connection to the Heater 1 TT ST Burner u Connect wires together with suitable approved wire connectors Green to Ground White to L2 Black to L1 Note Junction box is not provided with heater Conduit can also be attached directly to heater with wire junction made within the heater cabinet 26 of 51 SECTION 11 OPERATION AND MAINTENANCE ADANGER Electrical Shock Hazard Explosion Hazard Turn off gas supply to Di nnect electric 7 reels heater before service before service Heater must be connected to a properly grounded electrica source SECTION 11 OPERATION AND MAINTENANCE A WARNING Cut Pinch Hazard Wear protective gear during installation operation and service Burn Hazard Allow heater to cool before service Tubing may still be hot after operation Edges are sharp Failure to follow these instructions can result in death electric shock injury or property damage Read this manual carefully before installation operation or service of this equipment All components are accessed via hinged door secured by tooled access Opening the door exposes live electrical connections and hot components A WARNING Severe Injury Hazard Turn off gas and electrical supply before service Fan can start automatically at any time Failu
26. Part Number Max Number of Heaters UHA XI S 300 400 DPST 90436300 2 Low Voltage Thermostat 23 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 10 5 UHA X S Series Internal Wiring Diagram AXIAL FAN UHA 300 AXIAL FAN 350 400 ONLY BLOWER PRESSURE SWITCH MANUAL RESET LIMIT SWITCH i LIMIT IGNITION UHA 30 125 ONLY SWITCH MODULE SENSE C Black ELECTRODE Black Black NOTE al im 24 VAC TO THERMOSTAT RED MANUAL FAN INPUT FROM THERMOSTAT 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 24 of 51 SECTION 10 WIRING 10 6 UHA X S Series Ladder Wiring Diagram 120 VAC FLAME SENSOR Flame IGNITION MODULE Limit Switch Limit Switch UHA 300 1390 400 Only ida po THERMOSTAT CONNECTION NOTE For field wiring into service junction box or if any of the original wire supplied with the heater must be replaced it must be replaced with wiring material having a temperature rating of at least 105 C 221 F and 600 volts For supply connections use No 14 AW
27. See warnings and important information on Page IT IS IMPORTANT THAT ONLY THE CORRECT 32 Section 13 before removing or replacing parts GAS VALVE IS USED WHEN REPLACING THESE Burner Components CONTROLS All serviceable burner parts are accessed by the door on the side of the heater Control door opens via tooled access 15 1 Gas Valve Remove the gas supply pipe at the heater inlet Follow steps on Page 41 Section 15 2 and See Page 41 Section 15 2 1 to remove gas valve manifold Replace in reverse order Verify that the gas flow direction of the valve is correct Use a minimum amount of gas seal on the thread joint Check that all the joints are leak free Reset gas valve See Page 29 Section 11 2 2 NOTE Seperated combustion model shown Air Duet DO gt US Description Part Number Gas Valve NG Models UHA X S 150 250 90032505 Gas Valve LP Models UHA X S 150 250 90032506 Gas Valve NG Models UHA X S 300 400 90032520 Gas Valve LP Models UHA X S 300 400 90032521 40 of 51 SECTION 15 REPLACEMENT PARTS 15 2 Burner Compartment The burner compartmentis 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 Burner Compartment Cover Flame Probe Viewing port for flame probe Remove flexible air duct from spigot Ignitio
28. Series is not installed by an electrician qualified in the installation and service of control systems for 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 COMBAT UHA Series is moved or transferred This warranty is nontransferable Roberts Gordon LLC is not permitted to inspect the damaged controller 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 LLC U S A 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 LLC s liability and your exclusive remedy under this warranty or any implied warranty including the implied warranties of merchantability and fitness for a particular purpose is limited to providing replacement parts during the term of this warranty Some jurisdictions do not allow limitations on how long an implied warranty lasts so this limitation may not apply to you There are no rights warranties or conditions expressed or implied statutory or otherwise other than those contained in this warranty Roberts Gordon LLC shall in no event be responsible for incid
29. TION AND SERVICE MANUAL 10 3 Low Voltage Thermostat with Multiple Heaters Models UHA X S 150 250 120V 60 Hz supply circuit Lt Transformer Relay FRONT VIEW D I erde Bo N coca a eine Fa T erah Black SOIL cts Call i Purple a Black BACK VIEW L2 Gnd lt be required per group of heaters NOTE If both the heat and fan only operations are to be used two relays will Model Relay Type Relay Part Number Max Number of Heaters UHA XI ST150 250 DPST 90436300 4 22 of 51 10 4 Low Voltage Thermostat with Multiple Heaters Models UHA X S 300 400 SECTION 10 WIRING FRONT VIEW I 4 A poe pa Ela Ce 6G Black COIL 1 5 COIL Purple ge l Black O A 120V 60 Hz supply circuit L1 _ __ BACK VIEW 2 28 25 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
30. age ou l entretien inad quat peuvent causer la mort des blessures ou des d g ts mat riels Lire entierement le manuel d installation d operation et d entretien avant l installation ou l entretien de cet quipement Linstallation doit tre effectu e par un installateur prouv contractant qualifi dans installation et la maintenance du syst me de chauffage par infrarouge activ au gaz RG SS ROBERTS GORDON RN Combat UHA Series A rothermes tubulaire Gamme standard Manuel d installation d operation et de service Modeles UHA X S 150 175 200 225 250 300 350 400 ase 25222 Bees Sees 2222 2 Combat Installateur Prenez le temps de lire et comprendre ces instructions avant toute installation Linstallateur doit remettre au propri taire un exemplaire de ce manuel Propri taire Gardez ce manuel dans un endroit s r pour fournir des informations au r parateur en cas de besoin Roberts Gordon LLC 1250 William Street P 0 Box 44 Buffalo New York 14240 0044 T l phone 1 716 852 4400 Fax 1 716 852 0854 Num ro sans frais 800 828 7450 C US Energy Verified www rg inc com 2012 Roberts Gordon LLC P N 111101FC 09 12 Orig TABLE OF CONTENTS SECTION 1 Heater Safety 1 1 1 Manpower Requirement 1 1 2 Safety Labels and Their Placement 1 1 3 California Propositio
31. al may be used at the roof or wall penetration instead of a thimble Ensure vent manufacturer s clearance from vent material is maintained Seal annular space of the type B 1 vent as well as all joints in the remaining vent 7 8 Replacing an Existing Heater in a Venting System When replacing an existing heater in a venting system the venting system may not be properly sized to vent the new heater The following steps to their previous conditions of use If improper venting is observed during any of the above tests the venting system must be corrected by a contractor qualified in the installation and service of gas fired equipment or your local gas supplier If the venting must be resized use appropriate tables in US Appendix G of NFPA 54 ANSI 2223 1 latest revision National Fuel Gas Code US or Standard CSA B149 1 Natural Gas and Propane Installation Code Canada to determine minimum size All vent corrections must be in accordance with the appropriate local codes and the NFPA 54 ANSI 2223 1 must be followed with each appliance connected to the venting system placed in operation while any other appliances connected to the venting system are not in operation 1 Seal any unused openings in the venting sys tem 2 Inspect the venting system for proper size and horizontal pitch as required by the NFPA 54 latest revision National Fuel Gas Code US or Standard CSA B149 1 Natural Gas and Propane Installation Cod
32. ance 13 4 Heat Exchanger Maintenance 13 5 Gas Valve Maintenance 13 6 Flue Blowers nam 13 7 Venting and Air Intake Pipe 13 8 Maintenance Checklist eeeeeeeeeeeseeeeeeeeeeeees SECTION 14 Troubleshooting 14 1 General 14 2 Troubleshooting For Automatic Ignition Burner IS EIL 1 1 SPPRRRE IRRE T AE 14 3 Troubleshooting for Flame Supervision System 14 4 Troubleshooting for Gas Valves seeeseeseeeeeeeeeee 14 5 Troubleshooting for Flue Blower sessen SECTION 15 Replacement Parts 15 1 Gas ValVO iii rias baca 15 2 Burner Compartment 15 3 Ignition Electrode and Flame Probe 15 4 Heat Exchanger 15 5 Louvers and Louver Spring 15 6 Flue Blower 15 7 Pressure Switch 15 8 Ignition Control 15 9 Axial Fan Guard Motor Assembly 15 10 Limit Switches SECTION 16 Specifications 16 1 Dimension Data 16 2 General Technical Data Table 16 3 Technical Data Table SECTION 17 The ROBERTS GORDON COMBAT UHA Series Warranty 2012 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 X S 150 175 Label Placement 2 Figure 2 UHA X S 2
33. ard Label 91010430 Vent Length Label 91039505 Vent to Outdoors Label 91010427 Warning Label 91010429 Rating Plate Label 91010419 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label 91010426 Proposition 65 Label 91070015 For separated combustion units only 3 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 3 UHA X S 300 400 Label Placement FRONT VIEW BACK VIEW A WARNING Cut Hazard fum of electrical sur 1 Cut Hazard Label w OU VENT TO OUTDOORS DONNER VENT A DEHORS pux Etats Unis Prato Vent to j Outdoors Logo Label Label Rating Plate Label vent Length Label ROBERTS GORDON ACCESS SIDE VIEW OUTSIDE ACCESS SIDE VIEW INSIDE Lighting Proposition 65 Label Installation Label Instruction Location Label DANGER Venting Arrangement Label Description Part Number Logo Label 91040030 Cut Hazard Label 91010430 Vent Length Labe
34. ars 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 e In aircraft storage and servicing areas heaters shall be installed at least 10 3 m above the upper surface of wings or of engine enclosures of the highest aircraft which may be housed in the hangar The measurement shall be made from the wing or engine enclosure whichever is higher from the floor to the bottom of the heater e In shops offices and other sections of aircraft hangars communicating with aircraft storage or servicing areas heaters shall be installed not less than 8 2 4 m above the floor e Suspended or elevated 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 e In accordance with the Standard for Parking Structures NFPA 88A
35. as supply pipe and electrical connections to support the heater s weight Gas can leak if not installed properly Failure to follow these instructions can result in death injury or property damage AWARNING Explosion Hazard Leak test all components of gas piping before operation Gas can leak if piping is not installed properly Do not high pressure test gas piping with heater connected Failure to follow these instructions can result in death injury or property damage A gas meter is connected to the service pipe by the gas supply company An existing meter should be checked preferably by the company to ensure that the meter is adequate for the rate of gas supply required Installation pipes must be fitted in accordance with local and national codes Pipes of smaller size than the heater inlet gas connection should not be used Gas lines must meet applicable codes United States Flexible stainless steel gas hose US models is certified per the standard for connectors for gas appliances ANSI Z21 21 CSA 6 10 latest revision SECTION 9 Gas PIPING Canada Rubber type 1 gas hose Canadian models is certified as being in compliance with the standard for elastomeric composite hose and hose couplings for conducting propane and natural gas CAN CGA 8 1 latest revision 9 1 Connections Connect the heater to the gas supply ensuring that the final connections are as follows e Gas supply pipe work is run i
36. ashes LED code Press in reset button on manual reset limit switch Yes Does flue blower run Is 120 V supply at fan connections Flue blower faulty replace No 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 For your safety and optimum heater performance use only replacement parts sold and su
37. at to the OFF position The burner will turn off immediately The fan will continue to run for 90 seconds To restart turn the thermostat above room temperature 12 3 Simple Troubleshooting Some possible reasons for the heater not operating are 1 Gas supply not ON 2 Electricity supply not ON 3 The time and or temperature controls are not ON 4 A limit switch may have operated This may be caused by an interruption of the electrical supply failure of the distribution fan or vent or heat exchanger blockage If a temperature limit switch persistently trips there is a fault which must be investigated by a contractor qualified in the installation and service of gas fired heating equipment 12 3 1 Simple Troubleshooting Burner Fault If the burner fails to ignite for any reason it will retry for ignition four trials total After four unsuccessful ignition trials the control will put the heater into lockout for one hour Lockout should not occur during normal operation of the heater and indicates there is a fault condition which must be corrected There is an LED light on the ignition control that flashes codes to assist in fault correction See Page 31 Figure 15 for LED indication codes Figure 15 LED Diagnostic Codes LED INDICATION FAULT MODE Slow Flash Normal Operation No call for heat Fast Flash Normal Operation Call for heat 2 Flashes Ignition Lockout No flame detected
38. combustion air inlet of any other appliance 7 2 Vent Installation Maintain clearances to combustibles at all times for safety Clearances are the required distances that combustible objects must be away from the heater to prevent serious fire hazard See Page 7 Figure 4 For vented units the vent must terminate outside of the building Vents must be fully sealed and correctly sized for the model If the vent passes through a 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 13 Figure 6 through Page 17 Figure 11 The joints between the vent terminal and the roof or wall must be properly sealed If the vent passes through a wall or ceiling of combustible material it must be enclosed by a listed thimble and be separated from the thimble by at least a 2 5 cm air gap Vents and air intakes must be adequately supported so that the heater does not bear the weight of the pipes For vent termination See Page 13 Figure 6 through Page 17 Figure 11 11 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 7 2 1 Standard Vented Heaters Models UHA X 150 400 The vent must be fitted with a low resistance terminal See Page 13 Figure 6 through Page 14 Fi
39. date of shipment from Roberts Gordon LLC or the remaining ROBERTS GORDON COMBAT UHA Series warranty ROBERTS GORDON LLC 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 e Improper installation operation or maintenance e Misuse abuse neglect or modification of the ROBERTS GORDON COMBAT UHA Series in any way Use of the ROBERTS GORDON COMBAT UHA Series for other than its intended purpose e Incorrect gas or electrical supply accident fire floods acts of God war terrorism or other casualty e Improper service use of replacement parts or accessories not specified by Roberts Gordon LLC e Failure to install or maintain the ROBERTS GORDON COMBAT UHA Series as directed in the Installation Operation and Service manual e Relocation of the ROBERTS GORDON COMBAT UHA Series after initial installation e The use of the ROBERTS GORDON COMBAT UHA Series in a corrosive atmosphere containing contaminants e The use of the ROBERTS GORDON COMBAT UHA Series in the vicinity of a combustible or explosive material e Any defect in the ROBERTS GORDON COMBAT UHA Series arising from a drawing design or specification supplied by or on behalf of the consumer e Damage incurred during shipment Claim must be filed with carrier WARRANTY IS VOID IF The ROBERTS GORDON COMBAT UHA
40. e Canada Figure 6 Vent and Roof Detail ANSI Z223 1 latest revision National Fuel Vent Gas Code US or Standard CSA B149 1 Terminal Natural Gas and Propane Installation Code Canada and these instructions Determine Flashing that there is no blockage or restriction leakage Oral Sonat 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 A pS are located and other spaces of the building z j 4 nz site Turn on clothes dryers and any exhaust fans such as range hoods and bathroom exhausts so that they shall operate at maximum speed Do not operate a summer exhaust fan Close fireplace dampers 4 Follow the lighting instructions Place the appliance being inspected in operation Adjust to Combustible N vent Material 13 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Figure 7 Standard Vented Heater Vertical and Horizontal Vent Termination gt lt Vent Terminal Listed Thimble 2 5cm Clearance 4 10cm Diameter Vent Listed Thimble Vertical 2 5cm Clearance Horizontal Flashing By Oth Option By Others 12 31 cm Minimum NOTE Vent supports not shown Model Vent Diameter Part Number UHA X 150 400 4 10 cm 90502102 14 of 51 SECTION 7 VENTING
41. e Page 27 Section 11 44 of 51 SECTION 15 REPLACEMENT PARTS 15 7 Pressure Switch A WARNING Carbon Monoxide Hazard Use correct pressure switch specified for each model according to manual Use of incorrect pressure switch or disabling pressure switch circuit could cause unsafe condition Failure to follow these instructions can result in death or serious injury Pull off 3 way connector Spring open plastic clips of mounting cradle Replace with correct type of pressure switch for model The pressure switches are color coded for each pressure setting Carry out a start up after working on or changing a pressure switch See Page 27 Section 11 UHA X S UHA X S UHA X S UHA X S UHA X S MODEL 150 175 200 225 250 300 350 400 Pressure Switch Kit P N 90439802 90439808 90439803 90439807 90439808 Color Code yellow orange gray brown orange Set Point in w c 32 79 41 68 79 Pressure Switch Snap Ring P N 90439850 90439850 90439850 90439850 90439850 15 8 Ignition Control The control mounts to the electrical plate Pull out ignition cable and wiring from board noting their positions Release the four mounting standoffs Refit in reverse Ensure correct location of ignition cable and all other wiring 15 9 Axial Fan Guard Motor Assembly The axial fan unit for the heater is supplied completely assembled and balanced MODEL UHAIXIIS 150 175 UHA X S 200
42. e flexible gas connector e Do not twist flexible gas connector e Ensure all joints are gas tight e Do not bend flexible gas connector sharply 20 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL A CAUTION Product Damage Hazard Hold gas nipple securely with pipe wrench when attaching flexible gas connector Failure to follow these instructions can result in product damage Do not bend flexible gas connector Gas Shut off Valve Option A Stainless Steel Flexible Gas Connector t Union Connection Option B Medium or Heavy Gauge Pipe Gas Connector Drip Leg vd Cap SECTION 10 WIRING A DANGER Electrical Shock Hazard Disconnect electric before service More than one disconnect switch may be required to disconnect electric from equipment Equipment must be properly grounded Failure to follow these instructions can result in death or electrical shock All heater models require constant 120 V 19 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
43. e the highest point where it passes through a flat roof of a building 7 6 Length Requirements If using vent lengths greater than 5 1 5 m condensation will form in the vent pipe Insulation and additional sealing measures high temperature silicone at all seams are required The entire vent should be insulated with foil faced fiberglass insulation 1 2 thick 1 1 2 density minimum Maximum Vent Lengths Table Model UHA XI S 150 400 of Elbows 40 ft 12 2 m 35 ft 10 7 m 30 ft 9 1 m 25 ft 76 m O A Go PO 20 ft 6 1 m 7 7 Vent Material SECTION 7 VENTING thermostat so that the appliance will operate continuously For any appliance having a draft hood test for draft hood appliance spillage at the draft hood relief opening after five minutes of main burner operation Use the flame of a match or candle After it has been determined that each appliance connected to the venting system Vent material may be single wall 26 ga minimum galvanized steel or equal thickness stainless steel Completely seal all joints refer to Page 11 Section properly vents when tested as outlined above return doors windows exhaust fans fireplace dampers and any other gas burning appliances 72 If penetrating a combustible wall or roof a listed thimble with 2 5 cm clearance must be used Where local codes permit a single section of type B 1 vent materi
44. ental or consequential damages or incur liability for damages in excess of the amount paid by you for the ROBERTS GORDON COMBAT 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 LLC shall not be responsible for failure to perform under the terms of this warranty if caused by circumstances out of its control including but not limited to war fire flood strike government or court orders acts of God terrorism unavailability of supplies parts or power No person is authorized to assume for Roberts Gordon any other warranty obligation or liability LIMITATIONS ON AUTHORITY OF REPRESENTATIVES No representative of Roberts Gordon LLC 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 LLC s duly authorized Executive Officer 49 of 51 RG ROBERTSGORDON 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 e Phone 716 852 4400 e 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
45. gure 7 Standard vented heaters do not allow outdoor air intake for combustion air 7 2 2 Separated Combustion Heaters Models UHA X S 150 400 The heaters are designed to be installed as separated combustion heaters The vent and air intake are run as separate pipes to the wall or roof terminals See Page 16 Figure 9 As an option the vent and air intake are run as separate pipes to a concentric vent box and a concentric vent air intake pipe penetrates the wall or roof See Page 16 Figure 10 and Page 17 Figure 11 For separated combustion installation the vent and air intake must be fitted with an individual and correctly sized sealed system and the vent and air intake must terminate at approved wall and roof terminals Separated combustion units may not be common vented See Page 11 Section 7 7 3 Unvented Operation A WARNING Carbon Monoxide Hazard Heaters may be installed vented or unvented Vented heaters must be vented outdoors Unvented heaters must be installed according to the installation manual Failure to follow these instructions can result in death or injury This heater is not approved to be 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 cfm per 1000 Btu h firing rate Canada 7 4 Horizontal Venting Horizontally vented heaters must be i
46. heater to supply air for combustion ventilation and distribution in accordance with local and national codes on Page 11 Section 7 3 6 Gas Supply It is important that the gas supply pipe is sized correctly to provide the inlet pressure as stated on the heater data plate The gas supply pipe and electrical connections must not support any of the heater s weight on Page 19 Section 9 3 7 Electrical Supply A permanent 120 V 60 Hz 1 electrical supply is required for the main electrical power The heater also requires suitable controls in accordance with See Page 21 Section 10 3 8 Vent Choose heater orientation to allow for the proper location of the vent Each heater must be fitted with a correctly sized sealed vent system If vented horizontally no other appliance may be connected to the vent See Page 11 Section 7 SECTION 4 CLEARANCES TO COMBUSTIBLES 4 1 Required Clearances To Combustibles 4 WARNING Fire Hazard Keep all flammable objects liquids and vapors the required clearances to combustibles away from heater Some objects can catch fire or explode when placed close to heater Failure to follow these instructions can result in death injury or property damage Clearances are the required distances that combustible objects must be away from the heater to prevent serious fire hazards Combustibles are materials that catch on fire and include common items such as wood paper rubber fabric etc
47. heaters must be located a minimum of 18 50 cm below the floor ceiling assembly or 18 50 cm above the floor e In accordance with the Code for Motor Fuel Dispensing Facilities and Repair Garages NFPA 30A latest revision heaters must not be installed less than 8 2 4 m above the floor 5 4 Electrical The heater must be electrically grounded in accordance with the following codes United States Refer to National Electrical Code NFPA 70 latest revision Wiring must conform to the most current National Electrical Code local ordinances and any special diagrams furnished Canada Refer to Canadian Electrical Code CSA C22 1 Part 1 latest revision 5 5 Venting 8 of 51 The venting must be installed in accordance with the requirements within this manual and the following codes United States Refer to NFPA 54 ANSI Z223 1 latest revision National Fuel Gas Code Canada Refer to CSA B149 1 Natural Gas and Propane Installation Code SECTION 5 NATIONAL STANDARDS AND APPLICABLE CODES 5 6 High Altitude These heaters are approved without modifications for installations up to 2000 610 m in US and Canada Heaters installed above 2000 610 m must be de rated For installations above 2000 610 m in US consult factory for information on burner de rating For installations from 2000 610 m to 4500 1370m in Canada high altitude conversion kits are available Heaters i
48. ion or service of this equipment Heaters are not approved for residential installation These instructions the layout drawing local codes and ordinances and applicable standards that apply to gas piping electrical wiring venting etc must be thoroughly understood before proceeding with the installation Protective gear is to be worn during installation operation and service Thin sheet metal parts have sharp edges To prevent injury the use of work gloves is recommended Before installation check that the local distribution conditions nature of gas and pressure and adjustment of the appliance are compatible The heater must be applied and operated under the general concepts of resonable use and installed using the best building practices This appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety Children should be supervised to ensure that they do not play with the appliance For additional copies of the Installation Operation and Service Manual please contact Roberts Gordon LLC 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
49. ith local codes e To ensure that the heater is placed in an approved application 2 1 Wall Tag A laminated wall tag is included with the heater as a permanent reminder of the safety instructions and the importance of the required clearances to combustibles Affix the tag by peeling off the backing of the adhesive strips on the rear surface and position the tag on a wall near the heater A copy of the wall tag P N 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 SECTION 1 HEATER SAFETY 2 2 Corrosive Chemicals A CAUTION Product Damage Hazard Do not use equipment in area containing corrosive chemicals Refer to appropriate Material Safety Data Sheets MSDS Failure to follow these instructions can result in product damage Roberts Gordon LLC cannot be responsible for ensuring that all appropriate safety measures are undertaken prior to installation this is entirely the responsibility of the installer It is essential that the contractor the sub contractor or the owner identifies the presence of combustible materials corrosive chemicals or halogenated hydrocarbons anywhere in the premises Halogenated Hydrocarbons are a family of chemical compounds characterized by the presence of halogen ele ments fluorine chlorine bromine etc These compounds are frequently used in refrigerants c
50. l 91039505 Vent to Outdoors Label 91010427 Warning Label 91010429 Rating Plate Label 91010419 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label 91010426 Proposition 65 Label 91070015 For separated combustion units only Warning Label 4 of 51 SECTION 2 INSTALLER RESPONSIBILITY The installer is responsible for the following e To install the heater as well as the gas and electrical supplies in accordance with applicable specifications and codes Roberts Gordon LLC recommends the installer contact a Local Building Inspector or Fire Marshal for guidance e To use the information given in a layout drawing and in the manual together with the cited codes and regulations to perform the installation e To install the heater in accordance with the clearances to combustibles To furnish all needed materials not furnished as standard equipment e To plan location of supports vents and air intakes e To provide access for servicing e To provide the owner with a copy of this Installation Operation and Service Manual e To never use heater as support for a ladder or other access equipment and never hang or suspend anything from heater e To ensure there is adequate air circulation around the heater and to supply air for combustion ventilation and distribution in accordance w
51. l Shock Hazard Explosion Hazard Disconnect electric before service Heater must be connected to a properly grounded electrica source Turn off gas supply to heater before service SECTION 12 USER INSTRUCTIONS A WARNING Cut Pinch Hazard Wear protective gear during installation operation and service Burn Hazard Allow heater to cool before service Tubing may still be hot after operation Edges are sharp Failure to follow these instructions can result in death electric shock injury or property damage The UHA X S Series heaters are fully automatic and operate from the external controls fitted on site 12 1 Heater Operation When the heater has been switched on by the thermostat installed on site the main burner will automatically turn on The burner control box will control the safe ignition of the flame All heaters require a constant gas and electricity supply which must not be interrupted during the normal operation of this heater 12 2 Lighting Instructions 12 2 1 To Turn On Heater 1 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 2 The automatic firing sequence will begin as described on Page 28 Figure 13 The heater will now operate automatically under the control of the on site controls 12 2 2 To Turn the Heater Off Set the thermost
52. l gas pipes and pipe joints to ensure there are no cracks or gas leaks Any cracks in the pipes or pipe joints must be repaired IMPORTANT Inspect all suspended components and hardware Ensure that they are in good condition properly tightened and corrosion free 13 2 Burner Maintenance 1 Open the door and remove the burner compart ment cover See Page 41 Section 15 2 2 Clean any deposits from the main burner which may have formed in the injectors or venturi of the burner See Page 41 Section 15 2 3 Remove the ignition electrode and flame probe Check condition of ignition electrode and flame probe Clean off any deposits which may have been formed check condition of ceramic 32 of 51 insulators Replace as necessary See Page 42 Section 15 3 13 3 Fan Motor Assembly Maintenance The main fan bearings are permanently sealed and do not need lubrication Before cleaning turn off gas and electrical supply Remove the fan and use a small brush or duster to clean the fan blades from each side Replace fan when done 13 4 Heat Exchanger Maintenance The heat exchanger will remain clean unless a problem has developed with combustion Inspect the heat exchanger Look for signs of overheating at the front tubes which may indicate burner over firing or persistently low air flows 13 5 Gas Valve Maintenance No regular maintenance is required on this device To change gas control valves See Page 40 Section 15 1 Do not
53. leaning 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 5 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 3 CRITICAL CONSIDERATIONS 3 1 Basic Information UHA X S heaters have automatic ignition burners for ON OFF operation only 3 2 Manufactured Units Gas fired power vented unit heater with tubular heat exchanger Units shall have a minimum of 82 thermal efficiency The standard unit shall consist of a non separated combustion design with an aluminized heat exchanger Design and heat exchanger alternatives shall be offered as follows e Separated Combustion A separated combustion unit shall feature an enclosed sealed burner box A piece of flexible air duct connects this burner box to a flange on the cabinet Combustion air should be ducted from outside the heated space with the duct
54. mum of 20 ft lbs Washer 2 Nut 3 8 Threaded gt Bu Rod Threaded Rod Nut as E Washer Eu q Riv _r A x Nut 10 of 51 Cone Point Set Pin Support Points SECTION 7 VENTING A WARNING Carbon Monoxide Hazard Heaters may be installed vented or unvented Vented heaters must be vented outdoors Unvented heaters must be installed according to the installation manual Failure to follow these instructions can result in death or injury 7 1 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 NFPA 54 ANSI Z223 1 latest revision National Fuel Gas Code Canada Refer to CSA B149 1 Natural Gas and Propane Installation Code Any portion of vent pipe passing through a combustible wall must have a listed thimble to conform with the above codes The heater may be installed unvented in certain circumstances according to building ventilation codes Refer to the above codes and Page 12 Section 73 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
55. n 65 22nsneennnnnnnnnnennnen nen 1 21 Wall TAg oa een 5 2 2 Corrosive Chemicals 5 2 3 National Standards and Applicable Codes 5 SECTION 3 Critical Considerations csccseseseeeeeees 6 3 1 Basic Information 6 3 2 Manufactured Units 6 3 3 Location and Suspension 6 3 4 Minimum Required Installation Clearances 6 3 5 Ventilation 6 3 6 Gas Supply 6 3 7 Electricall SUPPIY ea 6 3 8 Ventres eea a a e E ERES 6 SECTION 4 Clearances TO combustibles 7 4 1 Required Clearances To Combustibles 7 4 2 Clearances To Combustibles 7 SECTION 5 National Standards and Applicable Codes 8 5 1 Gas Codes 8 5 2 Aircraft Hangars u u0 ee 8 5 3 Parking Structures and Repair Garages 8 54 Electical saeara aae ARA E era EEEE 8 E A eani 8 5 6 High Altitudei n een 9 SECTION 6 Heater installation 10 AM 10 6 2 Suspension 10 SECTION 7 Venting u ue nee 11 TA NEMING a Besen 11 7 2 Vent Installation 11 7 3 Unvented Operation uursuurssensnnennennnnnsnnennnnnnnnnn nenn 12 7 4 Horizontal Venting u 4 244444HBBnn nenne nennen ernennen 12 7 5 Vertical Venting ernennen 12 7 6 Length Requirements
56. n Electrode NOTE Flexible duct only applies for model UHAS Viewing port for ignition electrode Remove access plate Rubber Seal Remove screws and pull off burner compartment cover 15 2 1 Burner Injectors Ensure gas tight fitting of injectors Ensure correct alignment with burners Ensure all pipe joints are gas tight Manifold Remove manifold screws and pull out manifold Inshot Burners Orfices lt Manifold Unscrew Orfice Pe Burner UHA X S UHA X S UHA X S UHA X S UHA X S UHA X S UHA X S UHA X S MODEL 150 175 200 225 250 300 350 400 Orifice Quantity 7 8 9 10 11 12 14 14 Natural Gas G20 Orifice Marking 43 43 2 25 mm 2 25 mm 2 25 mm 40 40 40 P N 91930043 91930043 91930225 91930225 91930225 91930040 91930040 91930040 Propane G31 Orifice Marking 1 35 mm 1 35 mm 54 54 54 1 45 mm 53 53 P N 91930135 91930135 91930054 91930054 91930054 91930145 91930053 91930053 41 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 15 3 Ignition Electrode and Flame Probe Inshot Burners f Limit r L Thermostat i i i i i i 1 i j Remove All burner compartment screws to remove the burner compartment and __acce
57. n 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 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 19 of 51 Figure 12 Gas Connection e Hold gas nipple securely with pipe wrench when attaching th
58. ndividually vented Vent pipe must be sloped 1 4 6 cm for every 1 3 m For vent lengths greater than 5 1 5 m 12 of 51 condensation will form Insulation is recommended and condensation drains may be desired For vents pitched up toward the vent terminal place the condensation drain within 5 1 5 m of the heater In noncombustible walls only vent terminal P N 02537801 1P may be used For 4 10 cm vents in either combustible or noncombustible walls use vent terminal P N 90502100 or equivalent insulated vent terminal Follow the manufacturer s instructions for proper installation Instead of an insulated vent terminal a listed thimble with 2 5 cm air gap may be used with a 4 10 cm vent cap P N 90502102 7 5 Vertical Venting Vertically vented standard vented heaters can be common vented up to 4 heaters For vent lengths greater than 5 1 5 m condensation will form Insulation is recommended and condensation drains may be desired Vent from the rear of the heater cabinet then run the vent vertically and use a condensate drain at the bottom of the vertical vent Vent pipe must be sloped 1 4 6 cm for every 1 3 m For 4 10 cm an approved vent cap P N 90502102 must be used For 6 15 cm common vent an approved vent cap P N 90502103 must be used For common vertical venting of more than two heaters See Page 15 Figure 8 A vent shall not extend less than 2 6m abov
59. nstalled over 4500 1370 m in Canada are not approved and must be approved by the local or provincial authority 9 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 6 HEATER INSTALLATION 6 1 General Heaters are designed for installation above 6 1 8 m These heaters must be installed within the heated space Duct delivery systems are not permitted with axial fan units When handling or supporting the heater from below ensure that the weight is taken at the support points The gas or electrical supply lines must not be used to support the heater Do not locate the gas or electrical supply lines directly over the path of the flue products from the heater The heater must be installed in a location that is readily accessible for servicing The heater must be installed in accordance with clearances to combustibles as indicated on the wall tag and in this manual Figure 5 Suspension Methods 6 2 Suspension 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 minimum When handling or supporting the heater from below ensure that the weight is taken at the support points For typical suspension See Page 10 Figure 5 Ensure all suspension hardware is torqued to a mini
60. o heater 2 Turn off electric power to the heater 3 Turn off the manual gas valve in the heater supply line 4 Call your installer contractor qualified in the installation and service of gas fired heating equipment Failure to follow these instructions can result in death injury or property damage Clearances to Combustibles Installation Clearances Roof Terminal L Ul S gt S Optional separated lt lt gt SS combustion concentric A e 10 venting shown Wall Terminal D url em Max Mounting Height Models 30 125 odels lt Right gt lt Left gt Models 150 400 Models 30 125 150 400 Top 1 2 5 cm 6 15 cm Rear 18 46 cm 24 61 cm Max Mounting Height 12 8 7 m 20 6m 20 6 m 30 9 m Heaters can be mounted higher if destratification fans are installed See Installation Operation Models 30 125 150 400 Top 1 2 5 cm 6 15 cm Bottom 0 0 cm 3 8 cm Right 1 2 5 cm 31 79 cm Left 18 46 cm 6 15 cm 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 Installation Code and Annual Inspections All installation and service of
61. ocation Label Description Part Number Logo Label 91040030 Cut Hazard Label 91010430 Vent Length Label 91039505 Vent to Outdoors Label 91010427 Warning Label 91010429 Rating Plate Label 91010419 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label 91010426 Proposition 65 Label 91070015 For separated combustion units only Warning Label 2 of 51 SECTION 1 HEATER SAFETY Figure 2 UHA X S 200 250 Label Placement FRONT VIEW BACK VIEW WARNING Cut Hazard supply before Cut Hazard Label VENT TO OUTDOORS DONNER VENT sm A DEHORS ja les OM d Vent to ROBERTS GORDON o Outdoors Logo Label Label Rating Plate Label Vent Length Label ACCESS SIDE VIEW OUTSIDE ACCESS SIDE VIEW INSIDE WARNING p gt Lighting Instructions Label Proposition 65 Label Instruction Location Label DANGER DANGER Arrangement Label Installation Label Description Part Number Logo Label 91040030 Cut Haz
62. pplied by Roberts Gordon LLC Conduct start up procedure as shown on Page 27 Section 11 37 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 14 3 Troubleshooting for Flame Supervision System To measure flame current connect a O 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 pA 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 yA DC Typical flame probe current 3 5 pA DC 38 of 51 14 4 Troubleshooting for Gas Valves START Is gas pressure at inlet of the valve correct for gas type Note pressure found Does gas pressure at outlet of the valve rise when
63. re to follow these instructions can result in severe injury or product damage 11 1 Pre Start Up Checks All pre start up checks must be carried out before lighting the heater Ensure that the heater and all controls are suitable for the gas pressure and electrical supply to which they are to be connected 11 1 1 Louvers Where fitted the air delivery louvers need to be set during start up to give the required air distribution 11 1 2 Electrical Checks All pre start up checks must be carried out before start up the heater 1 Check that all site wiring is connected in accordance with the appropriate wiring diagram on Page 24 Section 10 5 11 1 3 Gas Supply All aspects of the gas installation including the gas meter must be inspected tested for gas tightness and purged in accordance 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 11 1 4 Mechanical Checks 1 Check that the fan is free to run and delivery louvers are turned to give required air deflection 2 Check that the flue and air intake for separated combustion units is installed in accordance with the instructions in this manual and local regulations See Page 11 Section 7 27 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 11 2 Begin Start Up 11 2 1 Before Operating the Heater To ensure that all the controls are in safe working order
64. read and understand these instructions prior to any installation Installer must give a copy of this manual to the owner Owner Keep this manual in a safe place in order to provide your serviceman with necessary information Roberts Gordon LLC 1250 William Street P 0 Box 44 Buffalo New York 14240 0044 Telephone 1 716 852 4400 Fax 1 716 852 0854 Toll Free 800 828 7450 www robertsgordon com www rg inc com P N 111101NA 09 12 Rev F POUR VOTRE SECURITE Si vous sentez une odeur de gaz Ouvrez les fen tres N essayez PAS d allumer un appareil N utilisez PAS d interrupteurs lectriques N utilisez PAS de t l phone dans votre b timent Eteignez toute flamme nue Quittez le b timent Apres avoir quitt le b timent appelez imm diatement votre fournisseur local de gaz Suivez les instructions du fournisseur de gaz Si vous ne pouvez pas joindre votre fournisseur de gaz appelez le service d incendie A AVERTISSEMENT Risque d incendie Garder tous les objets liquides ou vapeurs inflammables la distance minimale de l unit de chauffage requise avec les mat riaux combustibles Certains objets prendront feu ou exploseront s ils sont places proximit de l unit de chauffage Le non respect de ces instructions peut entrainer la mort des blessures corporelles ou des dommages materiels A ATTENTION L installation l ajustement l alteration le d marr
65. rely Look for signs of wear on the suspension materials or ceiling See Page 10 Figure 5 Silicone Tubing Ensure tight secure fit on all pressure fittings at pressure switch burner partition and blower outlet Gas Valve Verify that cap covering pressure regulator adjustment screw is secure and has not been tampered with Verify all wiring connections Condensate Drain when installed Flush drain and clear any obstructions Wall Tag If a wall tag is present make sure it is legible and accurate Please contact Roberts Gordon LLC or your ROBERTS GORDON independent distributor if you need a wall tag See Page 5 Section 2 1 34 of 51 SECTION 14 TROUBLESHOOTING SECTION 14 TROUBLESHOOTING ADANGER A WARNING Electrical Shock Hazard Explosion Hazard Burn Hazard Cut Pinch Hazard Disconnect electric Turn off gas supply to Allow heater to cool Wear protective gear before service heater before service before service during installation operation and service Heater must be Tubing may still be hot connected to a propery after operation Edges are sharp grounded electrica source Failure to follow these instructions can result in death electric shock injury or property damage 35 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 14 1 General START Are gas amp electrical supplies on Turn on supplies Wait 10 15 minutes
66. repair or disassemble gas valve Replace faulty gas valves with genuine replacement parts sold and supplied by Roberts Gordon LLC 13 6 Flue Blower The flue blower should not require maintenance However if the air pressure switch is causing burner lockout then remove the flue blower from the vent box by unscrewing the three screws at the mounting plate Remove the four screws attaching the mounting plate to the fan inlet See Page 44 Section 15 6 Ensure that the fan is free to run and that the fan wheel is clean 13 7 Venting and Air Intake Pipe Inspect all venting and air intake pipe Ensure that all seams are sealed and suspension points secure Repair suspension points if any part of the venting or combustion air pipe is sagging Check to make sure any insulation is not missing or in poor condition Replace as necessary Check all venting and air intake components to ensure they are in good condition gas tight and corrosion free 13 8 Maintenance Checklist Installation Code and Annual Inspections All installations and service of ROBERTS GORDON equipment must be performed by a contractor SECTION 13 SERVICING qualified in the installation and service equipment sold and supplied by Roberts Gordon LLC and conform to all requirements set forth in the ROBERTS GORDON manuals and all applicable governmental authorities pertaining to the installation service operation and labeling of the equipment To help facilitate
67. rtical Option 10 3 m Maximum Horizontal Option Concentric Vent Box Part Number UHVK1 90504113 90504112 91119100 90502102R 90502103 Description Concentric Vent Kit 150 250 Concentric Vent Box Top amp Side Assembly Concentric Vent Box Bottom Assembly Screw 6 x 3 8 Self Drilling 4 Vent Terminal with Baffle Plate 6 Combustion Air Terminal Part Number UHVK2 90504013 90504012 91119100 90502102R 90502104 Description Concentric Vent Kit 300 400 Concentric Vent Box Top amp Side Assembly Concentric Vent Box Bottom Assembly Screw 6 x 3 8 Self Drilling 4 Vent Terminal with Baffle Plate 8 Combustion Air Terminal 6 16 cm Minimum 12 31 cm Maximum F Storm Collar By Others Attach with 3 sheet metal screws 6 16 cm Minimum 12 31 cm Maximum 4 10 cm Type B 1 Vent Vent Terminal with Baffle Plate Storm Collar By Others Attach with 3 sheet metal screws Combustion Air Terminal Model Vent Diameter UHAIXIS 150 400 4 10 cm Model Air Intake Diameter UHAIXIS 150 250 4 10 cm UHA X S 300 400 5 13 cm 17 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 8 AIR SUPPLY 4 WARNING Explosion Hazard Equipment must have access to uncontaminated air at all times Failure to follow
68. ss the Front View Remove Screw Ignition Electrode Ignition L Electrode Y To replace the electrode or flame probe remove the electrical lead and screw Pull out from mounting Refit in reverse ensuring that the gap to burner is as shown in the front view of the burner compartment Description Part Number Spark Electrode 90427411 Automatic Ignition Flame Probe 90439300 Transformer 90436900K Ignition Module 90434008 Inshot Burners UHA X S 150 92000001 Inshot Burners UHA X S 175 92000001 Inshot Burners UHA X S 200 92000000 Inshot Burners UHA X S 225 92000000 Inshot Burners UHA X S 250 92000000 Inshot Burners UHA X S 300 92000000 Inshot Burners UHA X S 350 92000000 Inshot Burners UHA X S 400 92000002 Limit Switch 150 400 300 400 LOWER 90412103 Limit Switch 300 400 UPPER 90412105 42 of 51 15 4 Heat Exchanger SECTION 15 REPLACEMENT PARTS The heat exchanger consists of a sixpass design with 1 5 outer diameter aluminized steel 409 stainless steel tube The tube plates are made of aluminized steel 409 stainless steel The tube supports are made of aluminized steel 409 stainless steel 15 5 Louvers and Louver Spring Horizontal Louvers
69. tact Roberts Gordon LLC or ROBERTS GORDON independent distributor if you need replacement warning labels or logo labels See Page 2 Figure 1 through Page 4 Figure 3 Combustion Air Intake Pipe Intake pipe and inlet must be intact Look for obstructions cracks on the pipe gaps in the sealed areas or corrosion The area must be free of dirt and dust Clean and reinstall as required See Page 18 Section 8 33 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL Heat Exchanger Gas Line and Shut off Valves Make sure there are no cracks See Page 19 Section 9 Make sure there is no sagging bending or distortion Clean or replace as required Check for gas leaks See Page 19 Section 9 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 Inshot Burners and Orifices Compressed air or a vacuum cleaner may be used to clean dust and dirt Clear of obstructions even spider webs will cause problems Carefully remove any dust and debris from the burner Direct Spark Igniter Replace if there are cracked ceramics excessive carbon residue or erosion of the electrode The electrode gap should be 1 8 3 2 mm Thermostat There should be no exposed wire or damage to the device or wiring See Page 21 Section 10 Suspension Points Make sure the heater is hanging secu
70. these instructions can result in death injury or property damage 8 1 Separated Combustion Installation When installed as a separated combustion heater UHA X S the air for combustion is drawn in from outside the building It is important to ensure that there is adequate space around heater to provide air for the axial air distribution fan 8 2 Unvented Installation It is important to ensure that there is adequate fresh air supply at all times for both combustion and heating requirements in accordance with local and national codes 8 3 Building Ventilation Where ventilation is required air must be taken from an outside point where it is not likely to be contaminated or obstructed 8 4 Outside Combustion Air Supply If outside combustion air supply is required separated combustion model UHA X S heaters must be used Caution If the building has a slight negative pressure or corrosive contaminants such as halogenated hydrocarbons are present in the air an outside combustion air supply to the heater is required Seal all combustion air pipe joints The flexible air duct may have to be insulated to prevent condensation on the outer surface The outside air terminal must not be more than 1 31 cm above the vent terminal 8 4 1 Length Requirements Follow the constraints listed on Page 12 Section 76 18 of 51 SECTION 9 GAS PIPING AWARNING Fire Hazard Connect gas supply according to Figure 12 Do not use g
71. u f ay jo 8 m E 7 24 for Wall lt adequate gt Terminal air flow access axial fan 20 6 0 m 30 9 1 m Max Mounting Height Y fans are installed on Models 150 400 LE combustion concentric N Recommended mounting height varies with heater input Heaters may be mounted at a higher level if destratification Note Venting directly from top of heater not applicable Clearances to Combustibles er 15 cm t 6 31 15 cm 79 cm t 3 8 cm l Clearance to Vent 2 5 cm 31 79 cm minimum is necessary for servicing The heater must always be installed at least 6 2 m above the floor The vent pipe must have clearance from combustibles by 2 5 cm If installed at low levels where individuals can come in contact with hot heat exchanger components adequate guarding must be provided 7 of 51 UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL SECTION 5 NATIONAL STANDARDS AND APPLICABLE CODES 5 1 Gas Codes 5 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 Natural Gas and Propane Installation Code 5 2 Aircraft Hang
72. ut written permission of Roberts Gordon LLC Roberts Gordon LLC 1250 William Street P O Box 44 Buffalo NY 14240 0044 USA Telephone 1 716 852 4400 Fax 1 716 852 0854 Toll Free 800 828 7450 www rg inc com Printed in U S A P N 91040031 Rev D
73. work connecting to the unit with the use of the flange Stainless Steel Heat Exchanger A stainless steel heat exchanger unit shall consist of heat exchanger tubes heat exchanger tube supports heat exchanger tube plates and vent box produced of 409 stainless steel The use of stainless steel heat exchanger unit is recommended when air inlet temperatures are below 40 F 4 4 C or temperature rise is less than 40 F 22 2 C as condensation may form on the heat exchanger resulting in corriosion that may shorten its life 3 3 Location and Suspension All models e Must be installed indoors e Must be installed in a level position with horizontal discharge May be mounted on a shelf of non combustible material e May be suspended from above See Page 10 Figure 5 or from wall brackets of sufficient strength to support the heater as listed in the Technical Data Table on Page 49 Section 16 2 Drop rods must be a minimum of 3 8 diameter mild steel Four suspension points 3 8 nuts are located on top of the heater e Must be installed in a manner which allows access to all serviceable components See Page 7 Figure 4 for details 6 of 51 3 4 Minimum Required Installation Clearances Clearances around the heater and vent must be as indicated on Page 7 Figure 4 and Page 13 Figure 6 to ensure access for servicing and correct operation 3 5 Ventilation It is important to ensure that there is adequate air space around the

Roberts Gorden UHA SERIES 150 User's Manual

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