Roberts Gorden Combat UHAXS 100, Installation & Operation Manual

Page 1: ...property damage Read the Installation Operation and Service Manual thoroughly before installing or servicing this equipment Installer Please take the time to read and understand these instructions prior to any installation Installer must give a copy of this manual to the owner Owner Keep this manual in a safe place in order to provide your serviceman with necessary information Roberts Gordon LLC 1...

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Page 3: ... 21 7 3 Building Ventilation 21 7 4 Outside Combustion Air Supply 21 SECTION 8 Gas Piping 22 8 1 Connections 22 SECTION 9 Wiring 23 9 1 Positioning Thermostats 23 9 2 Low Voltage Thermostat with One Heater 23 9 3 Multiple Heater Wiring 30 45 24 9 4 Multiple Heater Wiring 60 125 25 9 5 Internal Wiring Diagram 26 9 6 Ladder Wiring Diagram 27 9 7 Electrical Connection to the Heater 28 SECTION 10 Oper...

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Page 5: ...re 10 Standard Vented Heater Vertical and Horizontal Vent Termination 17 Figure 11 Standard Vented Heater Common Vertical Vent Termination 18 Figure 12 Separated Combustion Heater Vertical and Horizontal Vent Termination 19 Figure 13 Concentric Vent Box 19 Figure 14 Concentric Vertical and Horizontal Vent Termination Separated Combustion Heater 20 Figure 15 Gas Connection 22 Figure 16 Automatic Bu...

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Page 7: ...t drawing local codes and ordinances and applicable standards that apply to gas piping electrical wiring venting etc must be thoroughly understood before proceeding with the installation Protective gear is to be worn during installation operation and service Thin sheet metal parts including the various venting components have sharp edges To prevent injury the use of work gloves is recommended Befo...

Page 8: ...40030 Cut Hazard Label 91010430 Vent Length Label 91039505 Vent to Outdoors Label 91010427 Warning Label 91010429 Rating Plate Label 91010420 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label 91010426 Manual Reset Switch Label 91010428 For separated combustion units only ...

Page 9: ...91010430 Vent Length Label 91039505 Vent to Outdoors Label 91010427 Warning Label 91010429 Rating Plate Label 91010420 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label 91010426 Manual Reset Switch Label 91010428 For separated combustion units only ...

Page 10: ...inted in U S A Imprimé aux Etats Unis 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 91010420 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label 91010426 For separated combustion units only ...

Page 11: ...P N 91040031 is illustrated on the back cover Know your model number Model number is found on the heater and throughout the Installation Operation and Service Manual 2 2 Corrosive Chemicals Caution Do not use heater in an area containing corrosive chemicals Avoid the use of corrosive chemicals to ensure a longer life of the burner heat exchanger and other parts Roberts Gordon cannot be responsible...

Page 12: ... Page 11 Figure 5 or from wall brackets of sufficient strength to support the heater as listed in the Dimension Data Table on Page 49 Section 15 1 Drop rods must be a minimum of 3 8 diameter mild steel Four suspension points 3 8 nuts are located on top of the heater Must be installed in a manner which allows access to all serviceable components See Page 7 Figure 4 for details 3 4 Minimum Required ...

Page 13: ...mbustibles WARNING Fire Hazard Connect gas supply according to Figure 15 Do not use gas supply pipe and electrical connections to support heater s weight Gas can leak if not installed properly Failure to follow these instructions can result in death injury or property damage WARNING Electrical Shock Hazard Disconnect electrical and gas supply before servicing This appliance must be connected to a ...

Page 14: ...hall 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 4 3 Parking Structures and Repair Garages Installation in garages must be in accordance with the following codes United States Standard for Parking Structures NFPA 88A latest revision or the Code for Motor Fue...

Page 15: ... approved heaters installed above 2000 610 m must be de rated For installations above 2000 610 m in US consult factory for information on burner de rating For installations from 2000 610 m to 4500 1370m in Canada high altitude conversion kits are available Heaters installed over 4500 1370 m in Canada are not CSA approved and must be approved by the local or provincial authority ...

Page 16: ...spension Four suspension points 3 8 nuts are located on the top of the heater Drop rods must be 3 8 diameter mild steel When handling or supporting the heater from below ensure that the weight is taken at the support points For typical suspension See Page 11 Figure 5 For typical shelf mounting on existing shelf See Page 11 Figure 6 5 3 Wall Mounting For typical suspension See Page 12 Figure 7 Wall...

Page 17: ...Washer Riv Nut Support Points Ensure all suspension hardware is torqued to a minimum of 20 ft lbs Washer 3 8 Threaded Rod Nut Unistrut Channel Nut Shelf Mounting Brackets Description Part Number Qty Shelf Mounting Bracket Kit 12011000K Shelf Mounting Bracket 11111510 2 Screw 10 x 1 2 Type AB Phil HWH Z 94311008 2 Existing cabinet screws must be re used ...

Page 18: ...g Bracket Kit 12011000K 1 Description Part Number Qty Wall Suspension Mounting Bracket Kit 12011001K Wall Mounting Bracket Arm Left 111WALL1L 1 Wall Mounting Bracket Arm Right 111WALL1R 1 Wall Mounting Bracket Vertical 111WAL2 2 Wall Mounting Bracket Diagonal 111WAL3 2 5 16 x 3 1 2 Bolt 97213925 6 5 16 Lock Nut with Nylon Insert 92114000 6 5 16 Flat Washer 95211600 6 5 16 Lockwasher 96411600 6 Har...

Page 19: ...l Louver Bracket 11111903 2 10 Screw 94311008 4 UHA X S 30 45 Vertical Louvers 11111901 5 Louver Spring 90901200 2 Instruction Sheet 91040036 1 Description Part Number Qty Vertical Louver Kit UHA X S 60 UHA X S 75 12011005K Vertical Louver Bracket 11111903 2 10 Screw 94311008 4 Instruction Sheet 91040036 1 Description Part Number Qty Vertical Louver Kit UHA X S 100 UHA X S 125 12011004K Vertical L...

Page 20: ... minimum temperature rating of 480 F 250 C 6 2 1 United States Requirements Vent must terminate at least 3 9 m above any forced air inlet located within 10 3 1 m Vent must terminate at least 4 1 2 m below 4 1 2 m horizontally from or 1 3 m above any door operable window or gravity air inlet into any building NFPA 54 ANSI Z223 1 latest revision National Fuel Gas Code specifies a 4 1 2 m horizontal ...

Page 21: ...ble walls only vent terminal P N 02537801 1P may be used For 4 10 cm vents in either combustible or noncombustible walls use vent terminal P N 90502100 or equivalent insulated vent terminal Follow the manufacturer s instructions for proper installation Instead of an insulated vent terminal a listed thimble with 2 5 cm air gap may be used with a 4 10 cm vent cap P N 90502102 In the State of Massach...

Page 22: ...enting of more than two heaters See Page 18 Figure 11 A vent shall not extend less than 2 6m above the highest point where it passes through a flat roof of a building 6 7 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 insul...

Page 23: ...proper venting is observed during any of the above tests the venting system must be corrected by a contractor qualified in the installation and service of gas fired equipment or your local gas supplier If the venting must be resized use appropriate tables in US Appendix G of NFPA 54 ANSI Z223 1 latest revision National Fuel Gas Code US or Standard CSA B149 1 Natural Gas and Propane Installation Co...

Page 24: ...UHA LOW PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 18 Figure 11 Standard Vented Heater Common Vertical Vent Termination ...

Page 25: ...o vent termination may be horizontal or vertical clearance Vertical Option Horizontal Option 12 31 cm Minimum from wall to vent termination NOTE Vent supports not shown Model Air Intake Vent Diameter Part Number UHA X S 30 125 4 10 cm 90502102 4 10 cm Single Wall Vent Pipe By Others Seal joint between single wall and Type B vent with silicone sealant Use 3 sheetmetal screws equally spaced around j...

Page 26: ...nt 6 16 cm Minimum 12 31 cm Maximum Storm Collar By Others Attach with 3 sheet metal screws Combustion Air Terminal Vent Terminal with Baffle Plate 4 10 cm Type B 1 Vent Storm Collar By Others Attach with 3 sheet metal screws 4 10 cm Diameter Vent 4 10 cm Diameter Vent 4 10 cm Diameter Vent NOTE Vent supports not shown Description Part Number Qty Concentric Vent Kit UHVK1 Concentric Vent Box Top S...

Page 27: ... and birth defects or other reproductive harm 7 3 Building Ventilation Where ventilation is required air must be taken from an outside point where it is not likely to be contaminated or obstructed 7 4 Outside Combustion Air Supply If outside combustion air supply is required separated combustion model UHA X S heaters must be used Caution If the building has a slight negative pressure or corrosive ...

Page 28: ...mediately 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...

Page 29: ...h 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 9 1 1 Fan Control The heater s axial fan can be used during the off season for air circulation A low voltage programmable thermostat with a...

Page 30: ...W PROFILE UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 24 9 3 Low Voltage Thermostat with Multiple Heaters 30 45 Model Relay Type Relay Part Number Max Number of Heaters UHA X S 30 45 SPST 90417600 4 ...

Page 31: ...SECTION 9 WIRING 25 9 4 Low Voltage Thermostat with Multiple Heaters 60 125 Model Relay Type Relay Part Number Max Number of Heaters UHA X S 60 125 DPST 90436300 4 ...

Page 32: ...HA 300 350 400 ONLY LIMIT SWITCH UHA 300 350 400 ONLY MANUAL RESET LIMIT SWITCH UHA 30 125 ONLY THERMOSTAT INPUT FIELD SUPPLIED R 24 VAC TO THERMOSTAT RED G MANUAL FAN INPUT FROM THERMOSTAT GREEN W HEAT DEMAND INPUT FROM THERMOSTAT WHITE C COMMON SIDE OF TRANSFORMER FLUE BLOWER R G W C ACC L1 CMB Blower Yellow Orange Orange Orange IMPORTANT For field wiring into service junction box or if any of t...

Page 33: ... IGNITION MODULE Flame Spark Limit Switch Limit Switch UHA 300 350 400 Only Manual Reset Limit Switch UHA 30 125 Only IMPORTANT For field wiring into service junction box or if any of the original wire supplied with the heater must be replaced it must be replaced with wiring material having a temperature rating of at least 105 C 221 F and 600 volts For supply connections use No 14 AWG or larger wi...

Page 34: ...T Junction box is not provided with heater Conduit can also be attached directly to heater with wire junction made within the heater cabinet BX Connector Junction Box Flexible Conduit Burner Connect wires together with suitable approved wire connectors Green to Ground White to L2 Black to L1 L1 L2 Ground Black White Green ...

Page 35: ...he main gas valve inlet test nipple 10 1 4 Mechanical Checks 1 Check that the fan is free to run and delivery louvers are turned to give required air deflection 2 Check that the flue and air intake for separated combustion units is installed in accordance with these instructions and local regulations 10 2 Begin Start Up 10 2 1 Before Operating the Heater To ensure that all the controls are in safe...

Page 36: ...conds Signals Output By Control Required Incoming Signals Flue Blower Pressure Switch P C NO NC 30 Seconds Purge Purge time begins at pressure switch change over Axial Fan 30 Seconds Delay 90 Seconds Delay 30 Seconds Post Purge If at any stage the flame fails the control will retry for ignition The control has four trials for ignition before a one hour lockout Pressure Regulator Gas Outlet Outlet ...

Page 37: ...s 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 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 ...

Page 38: ...ure that they function correctly Set the switches if fitted and thermostat s to the users requirements 10 3 Complete Start Up Ensure that all covers are fitted correctly and all test points are properly sealed 10 3 1 Instruction to the User Explain the controls of the heater to the user including how to turn it on and off using the controls fitted on site Give this manual to the user Ensure that t...

Page 39: ...Figure 19 Manual Reset Limit Switch 11 4 Lighting Instructions 11 4 1 To Turn On Heater 1 Ensure that the electrical and gas supplies to the heater are on Check that the on site controls are ON IMPORTANT The thermostat setting must be above the ambient temperature for the heater to operate WARNING Explosion Hazard Installation service and annual inspection must be done by a contractor qualified in...

Page 40: ...ips there is a fault which must be investigated by a contractor qualified in the installation and service of gas fired heating equipment 11 5 1 Simple Troubleshooting Burner Faults If the burner fails to ignite for any reason it will retry for ignition four trials total After four unsuccessful ignition trials the control will put the heater into lockout for one hour Lockout should not occur during...

Page 41: ...not need lubrication Before cleaning turn off gas and electrical supply Remove the fan and use a small brush or duster to clean the fan blades from each side Replace fan when done 12 4 Heat Exchanger Maintenance The heat exchanger will remain clean unless a problem has developed with combustion Inspect the heat exchanger Look for signs of overheating at the front tubes which may indicate burner ov...

Page 42: ...pment and perform service where necessary using only replacement parts sold and supplied by Roberts Gordon WARNING Explosion Hazard Installation service and annual inspection must be done by a contractor qualified in the installation and service of gas fired heating equipment or your gas supplier Turn off gas and electrical supplies before performing service or maintenance Failure to follow these ...

Page 43: ...ly remove any dust and debris from the burner Direct Spark Igniter Replace if there are cracked ceramics excessive carbon residue or erosion of the electrode The electrode gap should be 1 8 3 2 mm Thermostat There should be no exposed wire or damage to the device or wiring See Page 29 Section 10 Suspension Points Make sure the heater is hanging securely Look for signs of wear on the suspension mat...

Page 44: ...o test fan Yes Yes 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 No Yes Fan and limit switch are operating normally Replace temperature limit switch No Turn on supplies START UHA 30 75 Press in reset button on manual reset limit switch UHA 100 125 Wait 10 15 minutes...

Page 45: ...HOOTING 39 13 2 Troubleshooting For Automatic Ignition Burner Systems For optimum heater performance use only replacement parts sold and supplied by Roberts Gordon Conduct start up procedure as shown on Page 29 Section 10 ...

Page 46: ...place as required Is inlet burner gas pressure correct Is live and neutral polarity correct Is flame probe circuit correct Is there a current flowing in the flame probe circuit with no flame present Yes No Does lockout occur when there is a flame present Yes Is the connecting lead damaged Is the flame probe damaged or touching earthed components No Is the flame present and at least 1 μA DC flame c...

Page 47: ...outlet of the valve rise when valve turns on No Yes Is gas pressure at inlet of the valve correct for gas type Note pressure found No Yes START If problems persist contact Roberts Gordon LLC at www rg inc com Blower Operating TROUBLESHOOT ENDS No Blower motor faulty Replace with correct type Check blower motor leads for loose connections Correct power supply problem Yes START Does blower turn on a...

Page 48: ...eck that all the joints are leak free Reset gas valve See Page 31 Section 10 2 2 IT IS IMPORTANT THAT ONLY THE CORRECT GAS VALVE IS USED WHEN REPLACING THESE CONTROLS WARNING Explosion Hazard Installation service and annual inspection must be done by a contractor qualified in the installation and service of gas fired heating equipment or your gas supplier Turn off gas and electrical supplies befor...

Page 49: ... screws fitted and tight MODEL UHA X S 30 UHA X S 45 UHA X S 60 UHA X S 75 UHA X S 100 UHA X S 125 Orifice Quantity 2 3 4 5 6 7 Natural Gas G20 Orifice Marking 49 49 49 49 46 46 P N 91930049 91930049 91930049 91930049 91930046 91930046 Propane G31 Orifice Marking 56 56 56 1 15 mm 1 25 mm 1 25 mm P N 91930056 91930056 91930056 91930115 91930125 91930125 Remove manifold screws and pull out manifold ...

Page 50: ...ic Ignition Flame Probe 90439300 1 Transformer 90436900K 1 Ignition Module 90434008 1 Inshot Burners UHA X S 30 92000002 2 Inshot Burners UHA X S 45 92000002 3 Inshot Burners UHA X S 60 92000002 4 Inshot Burners UHA X S 75 92000002 5 Inshot Burners UHA X S 100 92000002 6 Inshot Burners UHA X S 125 92000002 7 Limit Switch 90412104 1 Manual Reset Limit Switch 90412106 1 To replace the electrode or f...

Page 51: ...p and bottom with supplied screws Install Vertical Louvers and Springs into Brackets with Springs at Top Horizontal Louvers Vertical Louvers For models UHA X S 60 and UHA X S 75 horizontal louvers are re used Description UHA X S 30 45 UHA X S 60 75 UHA X S 100 125 Horizontal Louvers P N 11111900 Spring P N 91901200 Quantity 3 5 7 Description Part Number Qty Vertical Louver Kit UHA X S 30 UHA X S 4...

Page 52: ...o Flue Blower screws To remove the blower remove screws securing the fan and mounting plate to the vent box To remove the blower from the mounting plate remove screws Refit in reverse order To change the vent and air intake orientation from back to top remove the blower and mounting plate as above Remove intake if applicable and exhaust covers from top of the heater Rotate the blower mounting plat...

Page 53: ... ignition cable and all other wiring 14 9 Axial Fan Guard Motor Assembly The axial fan unit for the heater is supplied completely assembled and balanced MODEL UHA X S 30 UHA X S 45 UHA X S 60 UHA X S 75 UHA X S 100 UHA X S 125 Pressure Switch Kit P N 90439801 90439810 90439802 90439810 90439810 90439803 Color Code pink black yellow black black gray Set Point in wc 23 35 32 35 35 41 Pressure Switch...

Page 54: ...9 5 wiring diagram Use only replacement parts sold and supplied by Roberts Gordon 14 10 Limit Switches 14 10 1 Removal and Replacement 1 Remove the electrical connections to the switch 2 Unscrew the two screws securing the switch 3 Fit a new switch with two screws 4 Reconnect the electrical connections and test operation Description Part Number Quantity Axial Fan UHA X S 30 12011910 1 Axial Fan UH...

Page 55: ...Center of Flue in cm 2 5 6 35 2 5 6 35 2 5 6 35 2 5 6 35 2 5 6 35 2 5 6 35 Recommended Mounting Heightto HeaterBase ft m 10 3 05 10 3 05 12 3 66 12 3 66 20 6 10 20 6 10 20 25 51 cm 25 5 65 cm 1 8 5 cm 16 63 42 cm 28 5 72 cm 3 3 8 cm REAR VIEW TOP VIEW Gas Supply Flue Air Intake UHA X S only D SIDE VIEW C Air Intake UHA X S only Optional Position Flue Optional Position 4 x 3 8 Captive Nuts Provided...

Page 56: ... CFM 691 691 1376 1376 1902 1902 Flue and Air Intake Flue and Air Intake Size in cm 4 10 All Models Maximum Straight Flue Air Intake ft m 25 7 6 25 7 6 25 7 6 25 12 2 40 12 2 40 12 2 Model UHA X S 30 UHA X S 45 UHA X S 60 UHA X S 75 UHA X S 100 UHA X S 125 Total Input Btu h x 1000 30 45 60 75 100 125 Total Output Btu h x 1000 24 6 36 9 49 2 61 5 82 102 5 Efficiency 82 All Models Natural Gas G20 Da...

Page 57: ...ent 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 is not permitted to inspect the damaged controller and or component parts READ YOUR INSTALLATION OPERAT...

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Page 59: ... check one o Automotive o Manufacturing o Warehouse o Recreational o Aircraft o Public Building o Office o Retail o Agricultural o Other______________ Mail or Fax to Roberts Gordon LLC 1250 William Street P O Box 44 Buffalo NY 14240 0044 Phone 716 852 4400 Fax 716 852 0854 Toll Free 800 828 7450 www rg inc com Installation Code and Annual Inspections All installations and service of ROBERTS GORDON ...

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Page 62: ...Annual Inspections All installations and service of ROBERTS GORDON equipment must be performed by a contractor qualified in the installation and service of equipment sold and supplied by Roberts Gordon and conform to all requirements set forth in the ROBERTS GORDON manuals and all applicable governmental authorities pertaining to the installation service and operation of the equipment To help faci...