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FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. DO NOT try to light any appliance.
3. DO NOT use electrical switches.
4. DO NOT use any telephone in
your building.
5. Extinguish any open flame.
6. Leave the building.
7. Immediately call your local gas
supplier after leaving the building.
Follow the gas supplier's
instructions.
8. If you cannot reach your gas
supplier, call the Fire Department.
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.
© 2012 Roberts-Gordon LLC
Tubular Unit Heaters
(Standard Range)
Installation, Operation
& Service Manual
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.
Keep this manual in a safe place in order to provide
your serviceman with necessary information.
Roberts-Gordon LLC
1250 William Street
P.O. 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
UHA-Series
Models UHA[X][S]
150, 175, 200, 225
250, 300, 350, 400
Owner
P/N 111101NA 09/12 Rev. F
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Summary of Contents for Roberts Gorden Combat UHA-Series
- Page 1 FOR YOUR SAFETY If you smell gas: 1. Open windows. 2. DO NOT try to light any appliance. 3. DO NOT use electrical switches. 4. DO NOT use any telephone in your building. 5. Extinguish any open flame. 6. Leave the building. UHA-Series 7.
- Page 3 POUR VOTRE SECURITE Si vous sentez une odeur de gaz: 1. Ouvrez les fenêtres. 2. N’essayez PAS d’allumer un appareil. 3. N’utilisez PAS d’interrupteurs électriques. 4. N’utilisez PAS de téléphone dans votre bâtiment. 5. Eteignez toute flamme nue. 6. Quittez le bâtiment. 7.
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Page 5: Table Of Contents
TABLE OF CONTENTS SECTION 1: Heater Safety............1 SECTION 11: Operation and Maintenance ......27 1.1 Manpower Requirements ..........1 11.1 Pre-Start-Up Checks ..........27 1.2 Safety Labels and Their Placement ......1 11.2 Begin Start-Up ............28 1.3 California Proposition 65 ..........1 11.3 Complete the Start-Up ..........30 2.1 Wall Tag ............... - Page 7 TABLE OF FIGURES Figure 1: UHA[X][S]150 - 175 Label Placement......2 Figure 2: UHA[X][S]200 - 250 Label Placement ....... 3 Figure 3: UHA[X][S]300 - 400 Label Placement ....... 4 Figure 4: Installation Clearances and Clearances to Combustibles............. 7 Figure 5: Suspension Methods ..........10 Figure 6: Vent and Roof Detail ..........
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Page 9: Section 1: Heater Safety
SECTION 1: H EATER AFETY SECTION 1: HEATER SAFETY Your Safety is Important to Us! 1.3 California Proposition 65 This symbol is used throughout In accordance with California Proposition 65 the manual to notify you of requirements, a warning label must be placed in a possible fire, electrical or burn highly visible location on the outside of the hazards. -
Page 10: Figure 1: Uha[X][S]150 - 175 Label Placement
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL Figure 1: UHA[X][S]150 - 175 Label Placement 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... -
Page 11: Figure 2: Uha[X][S]200 - 250 Label Placement
SECTION 1: H EATER AFETY Figure 2: UHA[X][S]200 - 250 Label Placement 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... -
Page 12: Figure 3: Uha[X][S]300 - 400 Label Placement
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL Figure 3: UHA[X][S]300 - 400 Label Placement 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... -
Page 13: Wall Tag
SECTION 1: H EATER AFETY SECTION 2: INSTALLER RESPONSIBILITY The installer is responsible for the following: 2.2 Corrosive Chemicals • To install the heater, as well as the gas and CAUTION 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. -
Page 14: Section 3: Critical Considerations
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL SECTION 3: CRITICAL CONSIDERATIONS 3.1 Basic Information 3.4 Minimum Required Installation Clearances UHA[X][S] heaters have automatic ignition burners Clearances around the heater and vent must be as for ON/OFF operation only. indicated on Page 7 , Figure 4 and Page 13, Figure 6 to ensure access for servicing and correct operation. -
Page 15: Section 4: Clearances To Combustibles
SECTION 4: C LEARANCES COMBUSTIBLES SECTION 4: CLEARANCES TO COMBUSTIBLES 4.1 Required Clearances To Combustibles Clearances for all heater models are located on the serial plate of the heater and throughout the manual. WARNING Check the clearances on the serial plate to make sure the product is suitable for your application and the clearances are maintained. -
Page 16: Section 5: National Standards And Applicable Codes
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 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 Installation in garages must be in accordance must be the type of gas used. -
Page 17: High Altitude
SECTION 5: N ATIONAL TANDARDS AND PPLICABLE ODES 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. -
Page 18: Section 6: Heater Installation
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL SECTION 6: HEATER INSTALLATION 6.1 General 6.2 Suspension Heaters are designed for installation above 6' WARNING (1.8 m). These heaters must be installed within the Crush Hazard heated space. Duct delivery systems are not permitted with axial fan units. -
Page 19: Section 7: Venting
SECTION 7: V ENTING SECTION 7: VENTING 100-73 standards. High temperature silicone sealant must have a minimum temperature rating of WARNING 480° F (250° C). Carbon Monoxide Hazard 7.1.1 United States Requirements Heaters may be installed Vent must terminate at least 3' (.9 m) above any vented or unvented. -
Page 20: Unvented Operation
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 7.2.1 Standard Vented Heaters condensation will form. Insulation is recommended (Models UHA[X] 150 - 400) and condensation drains may be desired. For vents pitched up toward the vent terminal, place the The vent must be fitted with a low resistance condensation drain within 5' (1.5 m) of the heater. -
Page 21: Vent Material
SECTION 7: V ENTING thermostat so that the appliance will operate Maximum Vent Lengths Table Model UHA[X][S] continuously. # of Elbows 150 - 400 5. For any appliance having a draft hood, test for 40 ft (12.2 m) 35 ft (10.7 m) draft hood appliance spillage at the draft hood 30 ft (9.1 m) relief opening after five minutes of main burner... -
Page 22: Figure 7: Standard Vented Heater - Vertical And Horizontal Vent Termination
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL Figure 7: Standard Vented Heater - Vertical and Horizontal Vent Termination Vent Terminal Flashing (By Others) Listed Thimble (2" [5cm] Clearance) 4" (10cm) Diameter Vent Listed Thimble 90° Vertical (2" [5cm] Clearance) Bend Option Flashing... -
Page 23: Figure 8: Standard Vented Heater - Common Vertical Vent Termination
SECTION 7: V ENTING Figure 8: Standard Vented Heater - 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, •... -
Page 24: Figure 9: Separated Combustion Heater - Vertical And Horizontal Vent Termination
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL Figure 9: Separated Combustion Heater - Vertical and Horizontal Vent Termination 12" (31 cm) Minimum from air inlet to vent 12" (31 cm) termination. Minimum from roof to vent termination. Vent** Air Intake* Vertical Option... -
Page 25: Figure 11: Concentric Vertical And Horizontal Vent Termination - Separated Combustion Heater
SECTION 7: V ENTING Figure 11: Concentric Vertical and Horizontal Vent Termination - Separated Combustion Heater Vent Terminal 4" (10 cm) with Baffle Plate Type B-1Vent UHAS 150-250: 6" (16 cm) Minimum 6" (15 cm) Diameter Single Wall 12" (31 cm) Maximum UHAS 300-400: 8"... -
Page 26: Section 8: Air Supply
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL SECTION 8: AIR SUPPLY WARNING Explosion Hazard Equipment must have access to uncontaminated air at all times. Failure to follow 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. -
Page 27: Section 9: Gas Piping
SECTION 9: G IPING 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:... -
Page 28: Figure 12: Gas Connection
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL Figure 12: Gas Connection 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. • Hold gas nipple Option A: Do not bend securely with pipe... -
Page 29: Section 10: Wiring
SECTION 10: W IRING SECTION 10: WIRING Heater must be wired and electrically grounded in accordance with local codes. In the absence of local DANGER 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 I - latest revision. -
Page 30: Low Voltage Thermostat With Multiple Heaters (Models Uha[X][S]150 - 250)
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 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 22 of 51... -
Page 31: Low Voltage Thermostat With Multiple Heaters (Models Uha[X][S]300 - 400)
SECTION 10: W IRING 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 23 of 51... -
Page 32: Uha[X][S] Series Internal Wiring Diagram
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 10.5 UHA[X][S] Series Internal Wiring Diagram AXIAL FAN (UHA 300, AXIAL FAN 350, 400) ONLY) Black G ee L2 L1 White G ee White White Black Black FLUE Black White G ee BLOWER G ee GAS VALVE... -
Page 33: Uha[X][S] Series Ladder Wiring Diagram
SECTION 10: W IRING 10.6 UHA[X][S] Series Ladder Wiring Diagram 120 VAC AXIAL FAN UHA (300, 350, 400 O ly) AXIAL FAN FLUE BLOWER TRANSFORMER GAS VALVE PRESSURE SWITCH FLAME SENSOR IGNITION Flame MODULE Limit witch Limit witch (UHA 300, 350, 400 O ly) ELECTRODE Ma al Reset Limit witch... -
Page 34: Electrical Connection To The Heater
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 10.7 Electrical Connection to the Heater 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... -
Page 35: Section 11: Operation And Maintenance
SECTION 11: O PERATION AND AINTENANCE SECTION 11: OPERATION AND MAINTENANCE DANGER WARNING Electrical Shock Hazard Explosion Hazard Burn Hazard Cut/Pinch Hazard Turn off gas supply to Allow heater to cool Wear protective gear Disconnect electric heater before service. before service. during installation, before service. -
Page 36: Begin Start-Up
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 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 turned off and power supply turned on. -
Page 37: Figure 14: Gas Valve For Models Uha[X][S] 150 - 400
SECTION 11: O PERATION AND AINTENANCE Figure 14: Gas Valve for Models UHA[X][S] 150 - 400 END VIEW TOP VIEW Regulator Outlet Gas Inlet Pressure Description Part Number Gas Valve 150 - 250 NG 90032505 Gas Valve 150 - 250 LP 90032506 Gas Valve 300 - 400 NG 90032520... -
Page 38: Complete The Start-Up
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 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’... -
Page 39: Section 12: User Instructions
SECTION 12: U NSTRUCTIONS SECTION 12: USER INSTRUCTIONS WARNING DANGER Electrical Shock Hazard Explosion Hazard Burn Hazard Cut/Pinch Hazard Turn off gas supply to Allow heater to cool Wear protective gear Disconnect electric heater before service. before service. during installation, before service. -
Page 40: Section 13: Servicing
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL SECTION 13: SERVICING WARNING DANGER Electrical Shock Hazard Explosion Hazard Burn Hazard Cut/Pinch Hazard Turn off gas supply to Allow heater to cool Wear protective gear Disconnect electric heater before service. before service. -
Page 41: Venting And Air Intake Pipe
SECTION 13: S ERVICING 13.7 Venting and Air Intake Pipe qualified in the installation and service equipment sold and supplied by Roberts-Gordon LLC and Inspect all venting and air intake pipe. Ensure that conform to all requirements set forth in the all seams are sealed and suspension points secure. - Page 42 UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL Heat Exchanger 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. Gas Line and Shut-off Check for gas leaks.
-
Page 43: Section 14: Troubleshooting
SECTION 14: T ROUBLESHOOTING SECTION 14: TROUBLESHOOTING WARNING DANGER Electrical Shock Hazard Explosion Hazard Burn Hazard Cut/Pinch Hazard Turn off gas supply to Allow heater to cool Wear protective gear Disconnect electric heater before service. before service. during installation, before service. operation and service. -
Page 44: General
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 14.1 General 36 of 51... -
Page 45: Troubleshooting For Automatic Ignition Burner Systems
SECTION 14: T ROUBLESHOOTING 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. 37 of 51... -
Page 46: Troubleshooting For Flame Supervision System
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 14.3 Troubleshooting for Flame Supervision System 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. START Connect a DC ammeter in series with the flame probe. -
Page 47: Troubleshooting For Gas Valves
SECTION 14: T ROUBLESHOOTING 14.4 Troubleshooting for Gas Valves START Is gas pressure at inlet of the Fault elsewhere. valve correct for gas type? Correct pressure problem. Note pressure found. Valve or ignition control Does gas pressure at outlet of the valve rise when faulty. -
Page 48: Section 15: Replacement Parts
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL SECTION 15: REPLACEMENT PARTS WARNING DANGER Electrical Shock Hazard Explosion Hazard Carbon Monoxide Hazard Fire 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. -
Page 49: Burner Compartment
SECTION 15: R EPLACEMENT ARTS 15.2 Burner Compartment The burner compartment is Burner a sealed compartment. Compartment Following any work, Cover re-seal the compartment Flame Probe with the gas pipe rubber Viewing port for flame probe seal fully in place and all Remove flexible screws fitted and tight. -
Page 50: Ignition Electrode And Flame Probe
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 15.3 Ignition Electrode and Flame Probe 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. -
Page 51: Heat Exchanger
SECTION 15: R EPLACEMENT ARTS 15.4 Heat Exchanger The heat exchanger consists of a six-pass design with 1.5" outer diameter [aluminized steel] [409 stainless steel] tube. The tube plates are made of [aluminized steel] [409 stainless steel]. The tube supports are made of [aluminized steel] [409 stainless steel]. -
Page 52: Flue Blower
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 15.6 Flue Blower 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. -
Page 53: Pressure Switch
SECTION 15: R EPLACEMENT ARTS 15.7 Pressure Switch Pull off 3 way connector. Spring open plastic clips of mounting cradle. Replace with correct type of pressure switch for model. The pressure switches are color coded for each pressure setting. Carry out a start-up after working on or changing a pressure switch. See Page 27 , Section 11. UHA[X][S] UHA[X][S] UHA[X][S]... -
Page 54: Limit Switches
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 15.9.1 Fan Removal and Replacement 15.10 Limit Switches 15.10.1 Removal and Replacement WARNING 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. -
Page 55: Section 16: Specifications
SECTION 16: S PECIFICATIONS SECTION 16: SPECIFICATIONS 16.1 Dimension Data TOP VIEW Heater must be supported at these points from above or below. 4 x 3/8" Captive Nuts Provided SIDE VIEW REAR VIEW Air Intake (UHA[X]S only) Flue Supply Thermostat Connection Electrical Supply... -
Page 56: General Technical Data Table
UHA S TANDARD EATER NSTALLATION PERATION AND ERVICE ANUAL 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 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) 26.7 26.7 35.0 35.0 35.0 43.2 43.2 43.2... -
Page 57: Section 17: The Roberts Gordon
® ® SECTION 17: T ROBERTS GORDON COMBAT UHA-S ERIES ARRANTY ® The data plate and/or serial number are removed, SECTION 17: THE ROBERTS GORDON defaced, modified or altered in any way. ® COMBAT UHA-SERIES WARRANTY ® ® The ownership of the ROBERTS GORDON COMBAT ROBERTS-GORDON LLC WILL PAY FOR: UHA-Series is moved or transferred. - Page 59 ® W a r m A i r H e a t i n g OWNER WARRANTY REGISTRATION CARD 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 •...