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Roberts Gorden Combat UHA-150, Installation, Operation & Service Manual

The Roberts Gorden Combat UHA-150 is a highly efficient heating unit designed for combat environments. To ensure a seamless experience, we offer the Installation, Operation & Service Manual as a free download. Simply visit our website to access the comprehensive manual and unlock the full potential of your unit.

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UHA S

TANDARD

 U

NIT

 H

EATER

 I

NSTALLATION

 O

PERATION

 

AND

 S

ERVICE

 M

ANUAL

26 of 51

10.7 Electrical Connection to the Heater

Note:

 J

u

nction box is not provided 

w

ith heater. 

Cond

u

it can also be attached directly to heater 

w

ith 

w

ire j

u

nction made 

w

ithin 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

Summary of Contents for Combat UHA-150

Page 1: ...se to heater 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 Man...

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Page 3: ...on respect de ces instructions peut entraîner la mort des blessures corporelles ou des dommages matériels ATTENTION L installation doit être effectuée par un installateur éprouvé contractant qualifié dans l installation et la maintenance du système de chauffage par infrarouge activé au gaz L installation l ajustement l altération le démarrage ou l entretien inadéquat peuvent causer la mort des ble...

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Page 5: ... 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 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 ...

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Page 7: ...d Vented Heater Vertical and Horizontal Vent Termination 14 Figure 8 Standard Vented Heater Common Vertical Vent Termination 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 Se...

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Page 9: ...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...

Page 10: ...only 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 ...

Page 11: ...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 ...

Page 12: ...only 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 ...

Page 13: ...of the wall tag P N 91040031 is illustrated on the back cover Know your model number Model number is found on the heater and throughout the Installation Operation and Service Manual 2 2 Corrosive Chemicals 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 essenti...

Page 14: ... horizontal discharge May be mounted on a shelf of non combustible material 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 Must be installed in a man...

Page 15: ... 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 WARNING Fire Hazard Keep al...

Page 16: ... 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 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 F...

Page 17: ...anada 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 18: ...es 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 6 2 Suspension Four suspension points 3 8 nuts are located on the top of the heater Drop rods must be 3 8 diameter mild steel mini...

Page 19: ...y 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 ...

Page 20: ...tched 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 l...

Page 21: ...h 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 thermostat so that the a...

Page 22: ...ontal Vent Termination Vent Terminal 4 10cm Diameter Vent Flashing By Others Listed Thimble 2 5cm Clearance Vent Terminal Vertical Option Horizontal Option Vent Listed Thimble 2 5cm Clearance Flashing By Others 12 31 cm Minimum NOTE Vent supports not shown 90 Bend Model Vent Diameter Part Number UHA X 150 400 4 10 cm 90502102 ...

Page 23: ...ination 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 24: ...f to vent termination Vertical Option Horizontal Option 90 Bend Model Vent Diameter Part Number UHA X S 150 400 4 10 cm 90502102 Model Air Intake Diameter Part Number UHA X S 150 250 4 10 cm 90502102 UHA X S 300 400 5 13 cm 90502105 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 joint Use 3 ...

Page 25: ...le Plate 4 10 cm Type B 1 Vent Storm Collar By Others Attach with 3 sheet metal screws Air Intake Description Part Number Qty Concentric Vent Kit 150 250 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 Vent Terminal with Baffle Plate 90502102R 1 6 Combustion Air Terminal 90502103 1 Description Part Numb...

Page 26: ...ide 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 Sea...

Page 27: ...tem 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 supp...

Page 28: ...lexible Gas Connector CAUTION Hold gas nipple securely with pipe wrench when attaching flexible gas connector Failure to follow these instructions can result in product damage Product Damage Hazard Do not bend flexible gas connector Hold gas nipple securely with pipe wrench when attaching the flexible gas connector Do not twist flexible gas connector Ensure all joints are gas tight Do not bend fle...

Page 29: ...ts 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 ...

Page 30: ...HEATER INSTALLATION OPERATION AND SERVICE MANUAL 22 of 51 10 3 Low Voltage Thermostat with Multiple Heaters Models UHA X S 150 250 Model Relay Type Relay Part Number Max Number of Heaters UHA X S 150 250 DPST 90436300 4 ...

Page 31: ...SECTION 10 WIRING 23 of 51 10 4 Low Voltage Thermostat with Multiple Heaters Models UHA X S 300 400 Model Relay Type Relay Part Number Max Number of Heaters UHA X S 300 400 DPST 90436300 2 ...

Page 32: ... AXIAL FAN UHA 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 NOTE For field wiring into service junction box or if a...

Page 33: ...ALVE ELECTRODE IGNITION MODULE Flame Spark Limit Switch Limit Switch UHA 300 350 400 Only Manual Reset Limit Switch UHA 30 125 Only 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 AWG or ...

Page 34: ... 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: ...sted 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 accorda...

Page 36: ...gure 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 Flame Signal Start Gas Valve Ignition Spark Thermostat 24 V SHUT DOWN RUN START ts 10 Seconds Signals Output By Control Required Incoming Signals Flue Blower Pressure Switch P C NO NC 30 Seconds Pur...

Page 37: ...ing 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 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 ...

Page 38: ...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 Figu...

Page 39: ...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 unsucce...

Page 40: ...ssembly 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 ...

Page 41: ...s time and check control settings and operation 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 exchange...

Page 42: ... 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 securely Look for signs of wear on the suspension materials or ceiling See Page 10 Figure 5 Silicone Tubing Ensure tight secure fit on a...

Page 43: ...re 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 44: ...UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL 36 of 51 14 1 General ...

Page 45: ... 51 14 2 Troubleshooting For Automatic Ignition Burner Systems For your safety and optimum heater performance use only replacement parts sold and supplied by Roberts Gordon LLC Conduct start up procedure as shown on Page 27 Section 11 ...

Page 46: ...replace 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...

Page 47: ...he 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 and off whil...

Page 48: ... 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 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 instructions can result i...

Page 49: ...r seal fully in place and all screws fitted and tight NOTE Flexible duct only applies for model UHAS MODEL UHA X S 150 UHA X S 175 UHA X S 200 UHA X S 225 UHA X S 250 UHA X S 300 UHA X S 350 UHA X S 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 ...

Page 50: ...2000001 8 Inshot Burners UHA X S 200 92000000 9 Inshot Burners UHA X S 225 92000000 10 Inshot Burners UHA X S 250 92000000 11 Inshot Burners UHA X S 300 92000000 12 Inshot Burners UHA X S 350 92000000 14 Inshot Burners UHA X S 400 92000002 14 Limit Switch 150 400 300 400 LOWER 90412103 1 Limit Switch 300 400 UPPER 90412105 1 To replace the electrode or flame probe remove the electrical lead and sc...

Page 51: ...steel 15 5 Louvers and Louver Spring The louvers for standard range models UHA X S 150 UHA X S 400 are only available in horizontal configurations Push in Louver and compress spring to remove and replace opposite end first Horizontal Louvers Push in Louver and compress spring to remove and replace opposite end first Horizontal Louvers Description UHA X S 150 175 UHA X S 200 250 UHA X S 300 400 Hor...

Page 52: ...or changing an flue blower See Page 27 Section 11 MODEL UHA X S 150 175 UHA X S 200 300 UHA X S 350 400 Flue Blower P N 90710405 90710403 90710402 Remove screws securing outlet flange to the flue adapter Refit in reverse order Remove screws securing flue blower mounting plate to vent box Remove screws securing mounting plate to blower Refit in reverse Use new gaskets Ensure sealed joints Ensure mo...

Page 53: ...ounting 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 UHA X S 150 175 UHA X S 200 225 UHA X S 250 UHA X S 300 350 UHA X S 400 Pressure Switch Kit P N 90439802 90439808 90439803 90439807 90439808 Color Code yellow orange gray brown ora...

Page 54: ...am Use only genuine replacement parts sold and supplied by Roberts Gordon LLC 15 10 Limit Switches 15 10 1 Removal and Replacement 1 Remove the electrical connections to the switch 2 Unscrew the two screws securing the switch 3 Fit a new switch with two screws 4 Reconnect the electrical connections and test operation Description Part Number Qty Axial Fan UHA X S 150 175 90710417 1 Axial Fan UHA X ...

Page 55: ...ICATIONS 16 1 Dimension Data A B F G H Heater must be supported at these points from above or below 4 x 3 8 Captive Nuts Provided Electrical Supply Air Intake UHA X S only Flue C D E Thermostat Connection Gas Supply N M L K J REAR VIEW SIDE VIEW TOP VIEW ...

Page 56: ...3 4 8 6 3 4 8 6 3 4 8 6 3 4 8 6 6 2 15 7 6 2 15 7 6 2 15 7 L in cm 5 9 15 0 5 9 15 0 5 9 15 0 5 9 15 0 5 9 15 0 8 7 22 1 8 7 22 1 8 7 22 1 M in cm 2 4 6 1 2 4 6 1 2 4 6 1 2 4 6 1 2 4 6 1 2 4 6 1 2 4 6 1 2 4 6 1 N in cm 6 5 16 5 6 5 16 5 6 5 16 5 6 5 16 5 6 5 16 5 6 5 16 5 6 5 16 5 6 5 16 5 Model UHA X S 150 UHA X S 175 UHA X S 200 UHA X S 225 UHA X S 250 UHA X S 300 UHA X S 350 UHA X S 400 Full Lo...

Page 57: ... 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 INSTALLA...

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Page 59: ...___ 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 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 confo...

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