Roberts Gorden Combat UHDXS 100 Installation & Operation Manual Download Page 45 | Manualshive

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SECTION 14: T

ROUBLESHOOTING

37 of 47

14.3 Troubleshootin

g

for Flame Supervision System

NOTE:

Minim

u

m flame probe c

u

rrent 1 μA DC. Typical flame probe c

u

rrent 3-5 μA DC.

To meas

u

re flame c

u

rrent, connect a 0 - 50 μA DC meter in series

w

ith the flame probe. If the meter

reads negative val

u

es, then reverse the test leads.

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Summary of Contents for Combat UHDXS 100

Page 1: ...ter Failure to follow these instructions can result in death injury or property damage WARNING Installation must be done by a contractor qualified in the installation and service of gas fired heating equipment or your gas supplier Improper installation adjustment alteration service or maintenance can result in death injury or property damage Read the Installation Operation and Service Manual thoro...

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Page 3: ...s Gordon LLC AVERTISSEMENT L installation doit être effectuée par un entrepreneur qualifié dans l installation et l entretien d appareils de chauffage au gaz ou par votre fournisseur de gaz L installation le réglage la modification la réparation ou la maintenance inadapté peut entraîner la mort des blessures ou des dommages matériels Lire attentivement le manuel d installation d utilisation et d e...

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Page 5: ... Material 14 7 9 Replacing an Existing Heater in a Venting System 14 SECTION 8 Air Supply 18 8 1 Separated Combustion Installation 18 8 2 Unvented Installation 18 8 3 Building Ventilation 18 8 4 Outside Combustion Air Supply 18 SECTION 9 Gas Piping 19 9 1 Connections 19 SECTION 10 Wiring 21 10 1 Positioning Thermostats 21 10 2 Low Voltage Thermostat with One Heater 21 10 3 UHD X S Series Internal ...

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Page 7: ...Vented Heater Vertical and Horizontal Vent Termination 15 Figure 10 Standard Vented Heater Common Vertical Vent Termination 15 Figure 11 Separated Combustion Heater Vertical and Horizontal Vent Termination 16 Figure 12 Concentric Vent Box 16 Figure 13 Concentric Vertical and Horizontal Vent Termination Separated Combustion Heater 17 Figure 14 Gas Connection 20 Figure 15 Automatic Burner Control Se...

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Page 9: ...talled 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 ap...

Page 10: ...azard Label 91010430 Vent Length Label 91039505 Vent to Outdoors Label 91010427 Warning Label 91010429 Rating Plate Label 91039802 Installation Label 91010431 Instruction Location Label 91010433 Lighting Instruction Label 91010425 Venting Arrangement Label 91010426 Manual Reset Switch Label 91010428 Proposition 65 Label 91070015 For separated combustion units only ...

Page 11: ...gaz Isolez le tuyau pour réduire la formation de condensation Pour les appareils en catégorie IV un pièce en T pour la condensation et un tuyau d écoulement doivent être utilisés SEE INSTALLATION MANUAL FOR PARTS LIST METHOD OF INSTALLATION AND FURTHER VENTING DETAILS VOIR LE MANUEL D INSTALLATION POUR PLUS DE RENSEIGNEMENTS WARNING ATTENTION VENT HEATER TO OUTDOORS ECHAPPEMENT DU BRULEUR A L EXTE...

Page 12: ...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 91039831 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 Roberts Gordon LLC cannot be responsible fo...

Page 13: ...ge May be mounted on a shelf of non combustible material using shelf mounting brackets See Page 11 Figure 6 and Page 11 Figure 7 for details 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 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 Techni...

Page 14: ...ustibles 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 and owner s responsibility to assure that adjacent materials are protected from degradation Consult local Fire Marshall Fire Insurance Carrier or other au...

Page 15: ...ot 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 5 3 Parking Structures and Repair Garages Installation in garages must be in accordance with the following codes United States Standard for Parking Structures NFPA 88A latest revision or the Code for Motor Fuel Disp...

Page 16: ...in US and Canada Heaters installed above 2000 610 m must be de rated For installations above 2000 610 m in US consult factory for information on burner de rating For installations from 2000 610 m to 4500 1370m in Canada high altitude conversion kits are available Heaters installed over 4500 1370 m in Canada are not approved and must be approved by the local or provincial authority ...

Page 17: ... 4 and may not be reversed The air flow must be adjusted such that it is within the acceptable range shown on Page 9 Section 6 1 3 The minimum inlet duct lengths shown on Page 9 Section 6 1 1 should be observed Pressure drop through the heat exchanger at various air flows is given on Page 9 Section 6 1 2 Figure 4 Air Flow Direction 6 1 1 Minimum Inlet Duct Length 6 1 2 Temperature Rise and Pressur...

Page 18: ... 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 6 3 Wall Mounting For typical suspension See Page 11 Figure 7 Wall mounted heaters blowing parallel to the wall can only be installed with the service door away from the wall The wall m...

Page 19: ...acket Arm Right Left Wall Suspension Mounting Wall Mounting Bracket Vertical Wall Mounting Bracket Diagonal 3 8 Fasteners Description Part Number Qty Wall Shelf Mounting Bracket Kit 12011002K Wall Suspension Mounting Bracket Kit 12011001K 1 Shelf Mounting Bracket Kit 12011000K 1 Description Part Number Qty Wall Suspension Mounting Bracket Kit 12011001K Wall Mounting Bracket Arm Left 111WALL1L 1 Wa...

Page 20: ... must have a minimum temperature rating of 480 F 250 C 7 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...

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

Page 22: ...een the space in which the appliance s connected to the venting system are located and other spaces of the building Turn on clothes dryers and any exhaust fans such as range hoods and bathroom exhausts so that they shall operate at maximum speed Do not operate a summer exhaust fan Close fireplace dampers 4 Follow the lighting instructions Place the appliance being inspected in operation Adjust the...

Page 23: ...SECTION 7 VENTING 15 of 47 Figure 9 Standard Vented Heater Vertical and Horizontal Vent Termination Model Vent Diameter Part Number UHD X 75 125 4 10 cm 90502102 ...

Page 24: ...r Common Vertical Vent Termination Requirements Maximum of four heaters can be commonly vented through the roof Heaters must be of the same BTU output Heaters must be controlled by a common thermostat Connections to a common stack must be positioned to avoid direct opposition between streams of combustion gases ...

Page 25: ...e Wall Vent Pipe By Others Seal joint between single wall and Type B vent with silicone sealant Use 3 sheetmetal screws equally spaced around joint Use 3 sheetmetal screws equally spaced around collar Concentric Vent Box 6 15 cm Single Wall Inlet Air Pipe By Others One piece of 4 10 cm diameter 1 4 6 cm airspace type B vent Selkirk Model RV or equivalent By others Combustion Air to Heater Toward O...

Page 26: ...ent Termination Separated Combustion Heater Description Part Number Qty Concentric Vent Kit UHVK1 Concentric Vent Box Top Side Assembly 90504113 1 Concentric Vent Box Bottom Assembly 90504112 1 Screw 6 x 3 8 Self Drilling 91119100 14 4 10 cm Vent Terminal with Baffle Plate 90502102R 1 6 15 cm Combustion Air Terminal 90502103 1 ...

Page 27: ...stion Air Supply If outside combustion air supply is required separated combustion model UHD 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 ...

Page 28: ...g 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 isola...

Page 29: ...SECTION 9 GAS PIPING 21 of 47 Figure 14 Gas Connection ...

Page 30: ...2 1 Part I latest revision 10 1 Positioning Thermostats A room thermostat should be mounted on a vibration free wall or column at a height of approximately 5 1 5 m from the floor to measure the ambient temperature It should be clear of both cold drafts and the direct path of warm air from the heater Avoid mounting thermostat on outside walls or in areas directly exposed to radiant heat or sunlight...

Page 31: ...es BLUE BLACK ORANGE ORANGE YELLOW BROWN WHITE WHITE L2 L1 ORANGE ORANGE BLACK BLACK GREEN WHITE BLUE BLACK GREEN BLUE GREEN YELLOW 24 VAC HOT GROUND FLAME BLACK BLACK 6 3 4 2 1 4 5 3 1 SENSE ELECTRODE LIMIT SWITCH PRESSURE SWITCH GAS VALVE IGNITION MODULE TRANSFORMER LIMIT SWITCH UHD 300 350 400 ONLY MANUAL RESET LIMIT SWITCH UHD 75 ONLY THERMOSTAT INPUT FIELD SUPPLIED R 24 VAC TO THERMOSTAT RED ...

Page 32: ...he heater must be replaced it must be replaced with wiring material having a temperature rating of at least 105 C 221 F and 600 V For supply connections use No 14 AWG or larger wires FLAME SENSOR PRESSURE SWITCH THERMOSTAT CONNECTION 6 3 4 5 2 1 120 VAC TRANSFORMER FLUE BLOWER GAS VALVE ELECTRODE IGNITION MODULE FLAME SPARK LIMIT SWITCH LIMIT SWITCH UHD 300 350 400 ONLY MANUAL RESET LIMIT SWITCH U...

Page 33: ...rovided 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 34: ... inlet test nipple 11 1 3 Mechanical Checks 1 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 12 Section 7 11 2 Begin Start Up 11 2 1 Before Operating the Heater To ensure that all the controls are in safe working order operate the heater for the first time with the isolating gas valve ...

Page 35: ...gnals 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 30 Seconds Post 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 PSI IN C ON OFF Regulator Outlet Pressure Gas Inlet Inlet Pressure TOP VIEW END VIEW Descriptio...

Page 36: ... for at least 15 minutes and then re check settings Adjust pressure setting if necessary 2 Check gas flow rate at gas meter 3 Turn off heater and electrical supply 4 Remove the manometer and refit all covers to the valve and tighten the screw of the outlet pressure tap 11 2 3 Pressure Switch The pressure switch is factory pre set for each model and is not adjustable 11 2 4 Turning Off the Heater S...

Page 37: ...The limit thermostat is located inside the access door of the heater See Page 41 Section 15 3 This control protects against excessive heat build up inside the burner compartment Cut Pinch Hazard Wear protective gear during installation operation and service Edges are sharp WARNING Failure to follow these instructions can result in death electric shock injury or property damage Burn Hazard Allow he...

Page 38: ... 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 4 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 f...

Page 39: ...ion 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 4 Gas Valve Maintenance No regular maintenance is required on this device To change gas control valves See Page 39 Section 15 1 Do not repair or disassemble gas valve Replace faulty gas valves with replacement parts sold and supplied by Roberts Gord...

Page 40: ...f 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 5 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 tubes Immediately remove objects in violation of the clearan...

Page 41: ...mics 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 22 Section 10 Suspension Points Make sure the heater is hanging securely 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 fitti...

Page 42: ...re sharp WARNING Failure to follow these instructions can result in death electric shock injury or property damage Burn Hazard Allow heater to cool before service Tubing may still be hot after operation Explosion Hazard Turn off gas supply to heater before service DANGER Electrical Shock Hazard Disconnect electric before service Heater must be connected to a properly grounded electrical source ...

Page 43: ...SECTION 14 TROUBLESHOOTING 35 of 47 14 1 General ...

Page 44: ...ATION AND SERVICE MANUAL 36 of 47 14 2 Troubleshooting For Automatic Ignition Burner Systems For optimum heater performance use only replacement parts sold and supplied by Roberts Gordon LLC Conduct start up procedure as shown on Page 26 Section 11 ...

Page 45: ...ng for Flame Supervision System NOTE Minimum flame probe current 1 μA DC Typical flame probe current 3 5 μA DC To measure flame current connect a 0 50 μA DC meter in series with the flame probe If the meter reads negative values then reverse the test leads ...

Page 46: ...ND SERVICE MANUAL 38 of 47 14 4 Troubleshooting for Gas Valves 14 5 Troubleshooting for Flue Blower For optimum heater performance use only replacement parts sold and supplied by Roberts Gordon LLC Conduct start up procedure as shown on Page 26 Section 11 ...

Page 47: ... 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 28 Section 11 2 2 IT IS IMPORTANT THAT ONLY THE CORRECT GAS VALVE IS USED WHEN REPLACING THESE CONTROLS Carbon Monoxide Hazard WARNING Use only genuine ROBERTS GORDON replacement parts per this installation operation and service manual Failure to follow these instructio...

Page 48: ... sealed compartment Following any work re seal the compartment with the gas pipe rubber seal fully in place and all screws fitted and tight NOTE Flexible duct only applies for model UHDS MODEL UHD X S 75 UHD X S 100 UHD X S 125 Orifice Quantity 5 6 7 Natural Gas G20 Orifice Marking 49 46 46 P N 91930049 91930046 91930046 Propane G31 Orifice Marking 1 15 mm 1 25 mm 1 25 mm P N 91930115 91930125 919...

Page 49: ...eset Limit Switch Position may vary Ignition Electrode Flame Probe Limit Switch Flame Probe Inshot Burners Description Part Number Qty Spark Electrode 90427411 1 Automatic Ignition Flame Probe 90439300 1 Transformer 90436900K 1 Ignition Module 90434008 1 Inshot Burners UHD X S 75 92000002 5 Inshot Burners UHD X S 100 92000002 6 Inshot Burners UHD X S 125 92000002 7 Limit Switch 90412104 1 Manual R...

Page 50: ...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 plate and gasket clockwise until the flue adapter lines up with the top hole Secure screws If applicable remove the...

Page 51: ... 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 8 Limit Switches 15 8 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...

Page 52: ... 6 1 15 5 2 8 7 1 1 6 4 1 3 4 8 6 6 7 17 0 18 2 46 2 5 5 14 0 4 4 11 2 6 8 17 3 1 8 4 6 32 81 3 UHD X S 100 in cm 28 5 72 4 22 6 57 4 20 3 51 6 17 6 44 7 16 6 42 2 1 25 3 2 7 0 17 8 6 0 15 2 2 4 6 1 1 6 4 1 3 4 8 6 6 7 17 0 18 2 46 2 6 3 16 0 4 4 11 2 6 8 17 3 1 8 4 6 37 94 UHD X S 125 in cm 28 5 72 4 22 6 57 4 20 3 51 6 17 6 44 7 16 6 42 2 1 25 3 2 7 0 17 8 6 0 15 2 2 4 6 1 1 6 4 1 3 4 8 6 6 7 17...

Page 53: ...e F C 22 12 22 12 20 11 Heat Exchanger Pressure Drop Maximum Air Volume in wc 0 36 0 55 0 98 Flue Size Air Intake in cm 4 10 All models Duct Size Width in cm 16 3 4 43 21 3 4 55 21 3 4 55 Duct Size Height in cm 15 7 8 40 15 7 8 40 15 7 8 40 Weight lb kg 81 36 7 92 41 7 97 44 Recomended Mounting Height to Heater Base ft m 12 3 66 20 6 10 20 6 10 Model UHD X S 75 UHD X S 100 UHD X S 125 Total Input ...

Page 54: ...UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 46 of 47 ...

Page 55: ...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 UHD 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 ...

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