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Quality in Any Language™
© 2008 Roberts-Gordon LLC
Tubular Duct Furnace
(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: 716.852.4400
Fax: 716.852.0854
Toll Free: 800.828.7450
www.rg-inc.com
UHD-Series
Models UHD[X][S][R]
150, 175, 200, 225
250, 300, 350, 400
Owner
P/N 113001NA 11/08 Orig.
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Troubleshooting
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Summary of Contents for Roberts Gorden UHD[X][S][R] 150
- Page 1 Quality in Any Language™ © 2008 Roberts-Gordon LLC UHD-Series Tubular Duct Furnace (Standard Range) Installation, Operation & Service Manual Models UHD[X][S][R] 150, 175, 200, 225 250, 300, 350, 400 Installer Please take the time to read and understand these instructions prior to any installation.
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Page 3: Table Of Contents
TABLE OF CONTENTS SECTION 1: Heater Safety... 1 1.1 Manpower Requirements ... 1 SECTION 2: Installer Responsibility ... 2 2.1 Wall Tag ... 2 2.2 Corrosive Chemicals... 2 2.3 National Standards and Applicable Codes ... 2 SECTION 3: Critical Considerations ... 3 3.1 Basic Information ... - Page 5 TABLE OF FIGURES Figure 1: Clearances to Combustibles ... 3 Figure 2: Air Flow Direction... 7 Figure 3: Suspension Methods ... 8 Figure 4: Vent and Roof Detail ... 11 Figure 5: Standard Vented Heater - Vertical and Horizontal Vent Termination... 12 Figure 6: Standard Vented Heater - Common Vertical Vent Termination ...
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Page 7: Section 1: Heater Safety
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 quarterly inspection of heater must be done by a contractor qualified in the installation and service of gas-fired... -
Page 8: Section 2: Installer Responsibility
UHD S TANDARD URNACE NSTALLATION SECTION 2: INSTALLER RESPONSIBILITY The installer is responsible for the following: • To install the heater, as well as the gas and electrical supplies, in accordance with applicable specifications and codes. Roberts-Gordon recommends the installer contact a Local Building Inspector or Fire Marshal for guidance. -
Page 9: Section 3: Critical Considerations
UHD[X][S][R] heaters have automatic ignition burners for ON/OFF operation only. 3.2 Manufactured Units Gas-fired, power-vented duct furnace 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. -
Page 10: Ventilation
UHD S TANDARD URNACE NSTALLATION 3.6 Ventilation WARNING Carbon Monoxide Hazard Heaters may be installed vented or unvented. Vented heaters must be vented outdoors. Unvented heaters must be installed in buildings with ventilation rates as per section 6.4. Failure to follow these instructions can result in death or injury. -
Page 11: Section 4: National Standards And Applicable Codes
SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES 4.1 Gas Codes 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. -
Page 12: High Altitude
UHD S TANDARD URNACE NSTALLATION 4.6 High Altitude These heaters are CSA-approved (without modifications) for installations up to 2000' (610 m) in US and Canada. CSA 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. -
Page 13: Section 5: Duct Heater Installation
Figure 2 and may not be reversed. The air flow must be adjusted such that it is within the acceptable 5.1.1 Minimum Inlet Duct Length Model UHD[X][S][R] 150-175 UHD[X][S][R] 200-250 UHD[X][S][R] 300-400 5.1.2 Temperature Rise and Pressure Drop Ranges UHD[X][S][R] 150... -
Page 14: Suspension
UHD S TANDARD URNACE NSTALLATION 5.1.3 Air Flow And Temperature Rise Ranges Model Rate (Btu/h) UHD[X][S][R] 150 150,000 UHD[X][S][R] 175 175,000 UHD[X][S][R] 200 200,000 UHD[X][S][R] 225 225,000 UHD[X][S][R] 250 250,000 UHD[X][S][R] 300 300,000 UHD[X][S][R] 350 350,000 UHD[X][S][R] 400 385,000 5.2 Suspension... -
Page 15: Section 6: Venting
SECTION 6: VENTING WARNING Carbon Monoxide Hazard Heaters may be installed vented or unvented. Vented heaters must be vented outdoors. Unvented heaters must be installed in buildings with ventilation rates as per section 6.4. Failure to follow these instructions can result in death or injury. -
Page 16: Unvented Operation
UHD S TANDARD URNACE NSTALLATION 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 11, Figure 4 through Page 14, Figure 9. 6.3.1 Standard Vented Heaters (Models UHD[X][R] 150 - 400) The vent must be fitted with a low resistance terminal. -
Page 17: Vent Material
The entire vent should be insulated with foil faced fiberglass insulation (1/2" thick, 1-1/2# density minimum). 6.7.1 Maximum Vent Lengths Model UHD[X][S][R] 150 - 400 40 ft (12.2 m) 35 ft (10.7 m) 30 ft (9.1 m) 25 ft (7.6 m) 20 ft (6.1 m) -
Page 18: Figure 5: Standard Vented Heater - Vertical And Horizontal
UHD S TANDARD URNACE NSTALLATION PERATION AND ERVICE ANUAL Figure 5: Standard Vented Heater - Vertical and Horizontal Vent Termination Model Vent Diameter Part Number UHD[X][R] 150 - 400 4" (10 cm) 90502102 Figure 6: Standard Vented Heater - Common Vertical Vent Termination... -
Page 19: Figure 7: Separated Combustion Heater - Vertical And
Figure 7: Separated Combustion Heater - Vertical and Horizontal Vent Termination 12" (31 cm) Minimum from air inlet to vent termination (may be horizontal Model Vent Diameter UHD[X]S[R] 150 - 400 4" (10 cm) Model *Air Intake Diameter UHD[X]S[R] 150 - 250 4"... -
Page 20: Figure 9: Concentric Vertical And Horizontal Vent Termination
UHD S TANDARD URNACE NSTALLATION Figure 9: Concentric Vertical and Horizontal Vent Termination - Separated Combustion Heater Description Concentric Vent Kit (150 - 250) Concentric Vent Box Top & Side Assembly Concentric Vent Box Bottom Assembly Screw #6 x 3/8 Self Drilling 4"... -
Page 21: Section 7: Air Supply
SECTION 7: A UPPLY SECTION 7: AIR SUPPLY 7.1 Separated Combustion Installation When installed as a separated combustion heater (UHD[X]S[R]), the air for combustion is drawn in from outside the building. 7.2 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. -
Page 22: Section 8: Gas Piping
UHD S TANDARD URNACE NSTALLATION SECTION 8: GAS PIPING Fire Hazard Connect gas supply according to Figure 10. 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. -
Page 23: Section 9: Wiring
SECTION 9: WIRING WARNING Electrical Shock Hazard Disconnect electrical and gas supply before servicing. This appliance must be connected to a properly grounded electrical source. Failure to follow these instructions can result in death or electrical shock. All heater models require constant 120 V/1Ø/60 Hz power supply. -
Page 24: Internal Wiring Diagram
UHD S TANDARD URNACE NSTALLATION 9.3 Internal Wiring Diagram FLUE BLOWER PRESSURE SWITCH ORANGE LIMIT SWITCH (UHD 300, 350, 400 ONLY) ORANGE MANUAL RESET LIMIT SWITCH (RESIDENTAL UNITS ONLY) SENSE ELECTRODE 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 V. -
Page 25: Ladder Wiring Diagram
9.4 Ladder Wiring Diagram FLAME SENSOR FLAME IGNITION MODULE ELECTRODE SPARK 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 V. -
Page 26: Electrical Connection To The Heater
UHD S TANDARD URNACE NSTALLATION PERATION AND ERVICE ANUAL 9.5 Electrical Connection to the Heater IMPORTANT: Junction box is not provided with heater. Conduit can also be attached directly to heater with wire junction made within the heater cabinet. -
Page 27: Section 10: Operation And Maintenance
SECTION 10: OPERATION AND MAINTENANCE 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. -
Page 28: Figure 11: Automatic Burner Control Sequence
UHD S TANDARD URNACE NSTALLATION Figure 11: Automatic Burner Control Sequence Burner Sequence for Ignition Control START Thermostat 24 V Flue Blower 30 Seconds Purge* Pressure Switch Ignition Spark Start Gas Valve Flame Signal *Purge time begins at pressure switch change over. Required Incoming Signals Signals Output By Control Figure 12: Gas Valve... -
Page 29: Complete Start-Up
10.2.2 Start-Up the Gas Valve (All Gases) 10.2.2.1 Check Burner Gas Pressure 1. Remove the plug in the outlet (burner) pressure test point and connect a pressure tap and a manometer. 2. With the burner firing, measure the pressure on the manometer. -
Page 30: Section 11: User Instructions
UHD S TANDARD URNACE NSTALLATION SECTION 11: USER INSTRUCTIONS 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. -
Page 31: Section 12: Servicing
SECTION 12: SERVICING 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 instructions can result in death, injury or property damage. -
Page 32: Maintenance Checklist
UHD S TANDARD URNACE NSTALLATION 12.7 Maintenance Checklist 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. -
Page 33: Section 12: Servicing
Gas Line and Shut-off Check for gas leaks. Valves See Page 16, Section 8. Burner Observation Make sure it is clean and free of cracks or holes. Window Clean and replace as required. Flue Blower Scroll, Wheel Compressed air or a vacuum cleaner may be used to clean dust and dirt. and Motor Inshot Burners and Clear obstructions (even spider webs will cause problems). -
Page 34: Section 13: Troubleshooting
UHD S TANDARD URNACE NSTALLATION SECTION 13: TROUBLESHOOTING 13.1 General START Are gas & electrical supplies on? Wait 10 - 15 minutes for Is ignition control showing a limit switch to cool. Does "4 flashes" LED code? Replace temperature limit Burner has locked out due Is ignition control showing a "2 flashes"... -
Page 35: Troubleshooting For Automatic Ignition Burner Systems
13.2 Troubleshooting For Automatic Ignition Burner Systems START Are gas & electrical supplies on? Are external controls (i.e. Thermostat) on? Wait 10 - 15 minutes for Is ignition control showing a limit switch to cool. Does "4 flashes" LED code? Replace temperature limit Does flue blower run? Is 120 V supply at fan... -
Page 36: Troubleshooting For Flame Supervision System
UHD S TANDARD URNACE NSTALLATION 13.3 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 37: Troubleshooting For Gas Valves
13.4 Troubleshooting for Gas Valves 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 Does gas pressure at outlet of valve return to zero or lower when valve turns off? TROUBLESHOOT ENDS. -
Page 38: Section 14: Replacement Parts
25, Section 12 before removing or replacing parts. NOTE: Separated combustion model shown. Description Gas Valve, NG (Models UHD[X][S][R] 150 - 225) Gas Valve, LP (Models UHD[X][S][R] 150 - 225) Gas Valve, NG (Models UHD[X][S][R] 250 - 400) Gas Valve, LP (ModelsUHD[X][S][R] 250 - 400) -
Page 39: Burner Compartment
14.2 Burner Compartment The burner compartment is 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. NOTE: Separated combustion model shown. 14.2.1 Burner Injectors Ensure gas tight fitting of injectors. Ensure correct alignment with burners. -
Page 40: Ignition Electrode And Flame Probe
Description Part Number Spark Electrode Automatic Ignition Flame Probe Transformer Ignition Module Inshot Burners UHD[X][S][R] 150 Inshot Burners UHD[X][S][R] 175 Inshot Burners UHD[X][S][R] 200 Inshot Burners UHD[X][S][R] 225 Inshot Burners UHD[X][S][R] 250 Inshot Burners UHD[X][S][R] 300 Inshot Burners UHD[X][S][R] 350... -
Page 41: Heat Exchanger
14.4 Heat Exchanger The heat exchanger consists of a four-pass design with 1.75" outer diameter [409 stainless steel] tube. The tube plates are made of [aluminized steel] [409 stainless steel]. The tube supports are made of [galvannealed steel] [409 stainless steel]. 14.5 Flue Blower MODEL Flue Blower P/N... -
Page 42: Pressure Switch
UHD S TANDARD URNACE NSTALLATION 14.6 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 21, Section 10. UHD[X][S][R] MODEL 150 - 175... -
Page 43: Section 15: Specifications
SECTION 15: SPECIFICATIONS 15.1 Dimension Data TOP VIEW Support Centers 19.4" (49 cm) REAR VIEW Air Intake (UHD[X][S][R] only) Flue Supply Thermostat Connection Electrical 6.5" Supply (17 cm) 2.4" (6 cm) Model [X][S][R] Width (cm) Height (cm) Duct Connector Flange (cm) Support Spacing (cm) -
Page 44: General Technical Data Table
UHD S TANDARD URNACE NSTALLATION 15.2 General Technical Data Table Model Full Load Amps @ 115 V Minimum Air Volume Temperature Rise @ °F Minimum Air Volume (°C) Heat Exchanger Pressure Drop @ Minimum Air Volume in wc Maximum Air Volume Temperature Rise @ °F Maximum Air Volume... -
Page 45: Section 16: The Roberts Gordon
SECTION 16: THE ROBERTS GORDON ® COMBAT UHD-SERIES WARRANTY ® ROBERTS GORDON WILL PAY FOR: Within 24 months from date of purchase by buyer or 27 months from date of shipment by Roberts-Gordon (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. -
Page 47: Owner Warranty Registration Card
OWNER WARRANTY REGISTRATION CARD Roberts Gordon LLC • 1250 William Street, P.O. Box 44 • Buffalo, NY 14240-0044 • Phone: 716-852-4400 • Fax: 716-852-0854 About the Owner: Name:__________________________________________________________________________________________________ Address:______________________________________City:_________________________ State:__________Zip Code:________ Phone:_________________________ Fax:_________________________ E-mail:______________________________________ About the Installer: Name:__________________________________________________________________________________________________ Address:______________________________________City:_________________________ State:_________Zip Code:_________ Phone:__________________________Fax:_________________________ E-mail:______________________________________ Purchased From (if different than installer): Name:__________________________________________________________________________________________________... - Page 50 Attach this information to the wall near the ROBERTS GORDON 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.
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