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.
POUR VOTRE SECURITE Si vous sentez une odeur de gaz: 1. Ouvrir les fenêtres. 2. N’essayer pas d’allumer un appareil. 3. N’utiliser pas d’interrupteurs électriques. 4. N’utiliser pas de téléphone dans votre bâtiment. 5. Eteindre flamme nue. 6. Quitter le bâtiment. 7. Après avoir quitté le bâtiment, appelez immédiatement votre fournisseur local de gaz. Suivre les instructions du fournisseur de gaz. 8. Si vous ne pouvez pas joindre votre fournisseur de gaz, appeler le service d’incendie.
TABLE OF CONTENTS SECTION 1: Heater Safety......................................................1 1.1 Manpower Requirements .............................................1 1.2 Safety Labels and Their Placement..............................1 1.3 California Proposition 65 ..............................................1 SECTION 2: Installer Responsibility .....................................5 2.1 Wall Tag .......................................................................5 2.2 Corrosive Chemicals..........
16.4 Dimension Data for Models UHD[T][M][X][S][R] 300-400.................................................................... 52 16.5 General Technical Data Table .................................. 53 16.6 Technical Data Table ................................................ 53 SECTION 17: The ROBERTS GORDON® UHD-Series Warranty .........................................................
TABLE OF FIGURES Figure 1: UHD[T][M][X][S][R] 150-175 Label Placement...........2 Figure 2: UHD[T][M][X][S][R] 200-250 Label Placement...........3 Figure 3: UHD[T][M][X][S][R] 300 – 400 Label Placement........4 Figure 4: Clearances to Combustibles ......................................7 Figure 5: Air Flow Direction .......................................................9 Figure 6: Suspension Methods ............................................... 10 Figure 7: Vent and Roof Detail ...........................
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, at a minimum, annual inspection of heater must be done by a contractor qualified in the installation and service of gas-fired heating equipment.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL Figure 1: UHD[T][M][X][S][R] 150-175 Label Placement Description Logo Label Vent Length Label Vent to Outdoors Label Warning Label Rating Plate Label Installation Label Instruction Location Label Lighting Instruction Label Venting Arrangement Label* Proposition 65 Label 0-10VDC Modulating Label** Part Number 91040030 91039505 91010427 91010429 91039802 91010431 91010433 91010425 91010426 91070015 91040196 * For separated combustion unit
SECTION 1: HEATER SAFETY Figure 2: UHD[T][M][X][S][R] 200-250 Label Placement Description Logo Label Vent Length Label Vent to Outdoors Label Warning Label Rating Plate Label Installation Label Instruction Location Label Lighting Instruction Label Venting Arrangement Label* Proposition 65 Label 0-10VDC Modulating Label** Part Number 91040030 91039505 91010427 91010429 91039802 91010431 91010433 91010425 91010426 91070015 91040196 * For separated combustion units only ** For modulating units only 3 of 55
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL Figure 3: UHD[T][M][X][S][R] 300 – 400 Label Placement Description Logo Label Vent Length Label Vent to Outdoors Label Warning Label Rating Plate Label Installation Label Instruction Location Label Lighting Instruction Label Venting Arrangement Label* Proposition 65 Label 0-10VDC Modulating Label** Part Number 91040030 91039505 91010427 91010429 91039802 91010431 91010433 91010425 91010426 91070015 91040196 * For separated combustion un
SECTION 2: INSTALLER RESPONSIBILITY 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 LLC recommends the installer contact a Local Building Inspector or Fire Marshal for guidance. • To use the information given in a layout drawing and in the manual together with the cited codes and regulations to perform the installation. 2.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL SECTION 3: CRITICAL CONSIDERATIONS 3.1 Basic Information UHD[T][M][X][S][R] heaters have automatic ignition burners for ON/OFF, HIGH/LOW or modulate within the range of HIGH/LOW operation. • May be mounted on a shelf of non-combustible material. • May be suspended from above (See Page 10, Section 6.2) or from wall brackets of sufficient strength to support the heater as listed in the Technical Data Table on Page 51, Section 16.
SECTION 4: CLEARANCES TO COMBUSTIBLES SECTION 4: CLEARANCES TO COMBUSTIBLES 4.1 Required Clearances to Combustibles WARNING Fire Hazard Keep all flammable objects, liquids and vapors the minimum required clearances to combustibles away from heater. 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.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL SECTION 5: NATIONAL STANDARDS AND APPLICABLE CODES 5.1 Gas Codes The type of gas appearing on the serial 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. Canada: Refer to CSA B149.1 Natural Gas and Propane Installation Code. 5.
SECTION 6: DUCT HEATER INSTALLATION SECTION 6: DUCT HEATER INSTALLATION 6.1 General To connect the inlet and outlet ducts to the heater, Duct-Mate or similar flanges may be slid over the duct connector flanges supplied on the unit and secured with screws. The connection to the duct then can be made using the Duct-Mate clips. The ducts must have removable access panels upstream and downstream of the heater.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 6.2 Suspension The gas or electrical supply lines must not be used to support the heater. WARNING Crush Hazard Do not locate the gas or electrical supply lines directly over the path of the flue products from the heater. Use 3/8" threaded rod minimum. The heater must be installed in a location that is readily accessible for servicing. Failure to follow these instructions can result in death, injury or property damage.
SECTION 7: VENTING SECTION 7: VENTING WARNING Carbon Monoxide Hazard Heaters must be vented outdoors. Heaters must be installed according to the installation manual. Failure to follow these instructions can result in death or injury. 7.1 Venting This heater must be vented in accordance with the rules contained in this manual and with the following national codes and any state, provincial or local codes which may apply: United States: Refer to NFPA 54/ANSI Z223.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL terminals. See Page 15, Figure 10. As an option, the vent and air intake are run as separate pipes to a concentric vent box and a concentric vent/air intake pipe penetrates the wall or roof. See Page 15, Figure 11 and Page 16, Figure 12.
SECTION 7: VENTING 6. After it has been determined that each piece(s) of equipment connected to the venting system Figure 7: Vent and Roof Detail properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-burning piece(s) of equipment to their previous conditions of use. 7.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL Figure 9: Standard Vented Heater - Common Vertical Vent Termination Type "B" vent cap (7" [18 cm] or 8" [20 cm]) may be used. (These are not available from the manufacurer.) SIDE VIEW Type "B" Vent Pipe 2'(.6 m) Minimum Roof Flashing Roof The last section of vent pipe passing through the roof or wall may be Type "B" vent pipe. All other vent materials in the building must be single wall vent pipe.
SECTION 7: VENTING Figure 10: Separated Combustion Heater - Vertical and Horizontal Vent Termination Model UHD[T][M][X]S[R] 150 - 400 Model UHD[T][M][X]S[R] 150 - 250 UHD[T][M][X]S[R] 300 - 400 **Vent Diameter 4" (10 cm) *Air Intake Diameter 4" (10 cm) 5" (13 cm) Part Number 90502102 Part Number 90502102 90502105 Figure 11: Concentric Vent Box 15 of 55
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL Figure 12: Concentric Vertical and Horizontal Vent Termination - Separated Combustion Heater 4" (10 cm) Type B-1 Vent NOTE: Vent supports not shown. Duct supports not shown. Duct and vent supports not provided by the 6" (16 cm) Minimum manufacturer.
SECTION 8: AIR SUPPLY 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 (UHD[T][M][X]S[R]), the air for combustion is drawn in from outside the building. 8.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 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. Fire Hazard Connect gas supply according to Figure 13. Do not use gas supply pipe and electrical connections to support heater’s weight. Gas can leak if not installed properly.
SECTION 9: GAS PIPING Figure 13: Gas Connection 19 of 55
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL SECTION 10: WIRING DANGER Electrical Shock Hazard Disconnect electric before service. More than one disconnect switch may be required to disconnect electric from heater. disconnect switch of proper electrical rating should be installed in the vicinity of the heater. All heaters are equipped with thermostat connections suitable to power a 24 V thermostat. Heater must be wired and electrically grounded in accordance with local codes.
SECTION 10: WIRING 10.3 UHD[X][S][R] Series Internal Wiring Diagram for Single Stage Gas Valves 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 221° F (105° C) and 600 V. For supply connections, use No. 14 AWG or larger wires.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 10.4 UHD[X][S][R] Series Ladder Wiring Diagram for Single Stage Gas Valves 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 221° F (105° C) and 600 V. For supply connections, use No. 14 AWG or larger wires.
SECTION 10: WIRING 10.5 UHD[T][X][S][R] Series Internal Wiring Diagram for Two Stage Gas Valves HIGH COMMON LOW W2 HIGH/LOW CONTROL 1 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 221° F (105° C) and 600 V. For supply connections, use No. 14 AWG or larger wires.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 10.6 UHD[T][X][S][R] Series Ladder Wiring Diagram for Two Stage Gas Valves HIGH STAGE 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 larger wires.
SECTION 10: WIRING 10.7 UHD[M][X][S][R] Series Internal Wiring Diagram for Modulating Gas Valves 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 221° F (105° C) and 600 V. For supply connections, use No. 14 AWG or larger wires.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 10.8 UHD[M][X][S][R] Series Ladder Wiring Diagram for Modulating Gas Valves 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 221° F (105° C) and 600 V. For supply connections, use No. 14 AWG or larger wires.
SECTION 10: WIRING 10.9 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.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL SECTION 11: OPERATION AND MAINTENANCE WARNING DANGER Electrical Shock Hazard Disconnect electric before service. Explosion Hazard Turn off gas supply to heater before service. Heater must be connected to a properly grounded electrical source. Burn Hazard Allow heater to cool before service. Cut/Pinch Hazard Wear protective gear during installation, operation and service. Tubing may still be hot Edges are sharp. after operation.
SECTION 11: OPERATION AND MAINTENANCE Figure 14: Automatic Burner Control Sequence Burner Sequence for Ignition Control START RUN SHUT DOWN Thermostat 24 V Flue Blower Pressure Switch 30 Seconds Purge* P C 30 Seconds Post NO NC ts = 10 Seconds Ignition Spark Start Gas Valve Flame Signal *Purge time begins at pressure switch change over. Required Incoming Signals Signals Output By Control If at any stage the flame fails, the control will retry for ignition.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL Figure 16: Two Stage Gas Valve for Models UHD[T][X][S][R] 150 - 400 TOP VIEW Regulator END VIEW LO ½PSI HI C IN ON OFF Gas Inlet Inlet Pressure Description Gas Valve 150 - 250 NG Gas Valve 150 - 250 LP Gas Valve 300 - 400 NG Gas Valve 300 - 400 LP Outlet Pressure Part Number 90032530 90032531 90032532 90032533 Figure 17: Modulating Gas Valve for Models UHD[M][X][S][R] 150 - 400 Description Gas Valve 150 - 250 NG Gas Valve 150 -
SECTION 11: OPERATION AND MAINTENANCE 11.2.2 Start-Up the Gas Valve (All Gases) 11.2.2.1 Check Burner Gas Pressure (Single Stage) 1. Remove the plug in the outlet (burner) pressure test point and connect a pressure tap and a manometer. See Page 29, Figure 15. 2. With the burner firing, measure the pressure on the manometer.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 11.3 Pressure Switch The pressure switch is factory pre-set for each model and is not adjustable. 11.4 Turning Off the Heater Set the thermostat to the "OFF" position or lowest setting and the main burner will stop. 11.5 External Controls External controls may include time switch, interlock switch, room thermostat and frost thermostat. Operate each control to ensure that they function correctly.
SECTION 12: USER INSTRUCTIONS SECTION 12: USER INSTRUCTIONS WARNING DANGER Electrical Shock Hazard Disconnect electric before service. Heater must be connected to a properly grounded electrical source. Explosion Hazard Turn off gas supply to heater before service. Burn Hazard Allow heater to cool before service. Cut/Pinch Hazard Wear protective gear during installation, operation and service. Tubing may still be hot Edges are sharp. after operation.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL Figure 18: LED Diagnostic Codes LED INDICATION FAULT MODE Slow Flash Normal Operation - No call for heat. Fast Flash Normal Operation - Call for heat. 2 Flashes Ignition Lockout - No flame detected. 3 Flashes Airflow Fault - Pressure switch open or closed. 4 Flashes Temperature Limit Switch Open 5 Flashes Flame Sense Error - Gas valve not energized.
SECTION 13: SERVICING SECTION 13: SERVICING WARNING DANGER Electrical Shock Hazard Disconnect electric before service. Heater must be connected to a properly grounded electrical source. Explosion Hazard Turn off gas supply to heater before service. Burn Hazard Allow heater to cool before service. Cut/Pinch Hazard Wear protective gear during installation, operation and service. Tubing may still be hot Edges are sharp. after operation.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL that the fan wheel is clean. qualified in the installation and service equipment sold and supplied by Roberts-Gordon LLC and 13.6 Venting and Air Intake Pipe conform to all requirements set forth in the Inspect all venting and air intake pipe. Ensure that ® all seams are sealed and suspension points secure.
SECTION 13: SERVICING Heat Exchanger Make sure there are no cracks. Make sure there is no sagging, bending or distortion. Clean or replace as required. Gas Line and Shut-off Valves Check for gas leaks. Burner Observation Window Make sure it is clean and free of cracks or holes. See Page 18, Section 9. Clean and replace as required. Flue Blower Scroll, Wheel Compressed air or a vacuum cleaner may be used to clean dust and dirt.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL SECTION 14: TROUBLESHOOTING WARNING DANGER Electrical Shock Hazard Disconnect electric before service. Heater must be connected to a properly grounded electrical source. Explosion Hazard Turn off gas supply to heater before service. Burn Hazard Allow heater to cool before service. Cut/Pinch Hazard Wear protective gear during installation, operation and service. Tubing may still be hot Edges are sharp. after operation.
SECTION 14: TROUBLESHOOTING 14.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 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 28, Section 11.
SECTION 14: TROUBLESHOOTING 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. Is the flame present and at least 1 µA DC flame current? No Use General Troubleshooting section to trace the fault.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 14.4 Troubleshooting for Gas Valves START Is gas pressure at inlet of the valve correct for gas type? Note pressure found. No Fault elsewhere. Correct pressure problem. No Valve or ignition control faulty. Replace with one of correct type. No Valve faulty. Replace with one of correct type. No If problems persist, contact Roberts-Gordon LLC at www.robertsgordon.com or www.rg-inc.
SECTION 15: REPLACEMENT PARTS SECTION 15: REPLACEMENT PARTS WARNING DANGER Electrical Shock Hazard Explosion Hazard Fire Hazard Carbon Monoxide 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. See warnings and important information on Page 35, Section 13 before removing or replacing parts.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 15.2 Burner Compartment for Models UHD[T][M][X][S][R] 150-400 Side View of Burner Compartment with Hinged Door Removed Before burner removal, remove the 10 screws holding the filler panel on and remove the filler panel. 15.2.1 Burner Compartment without Filler Panel for Models UHD[T][M][X][S][R] 150-400 Side View of Burner Compartment with Filler Panel Removed Burner assembly must be removed to service orifices, manifold or burners.
SECTION 15: REPLACEMENT PARTS 15.2.2 Burner Injectors for Models UHD[T][M][X][S][R] 150-400 Remove 4 screws to remove manifold. Ensure gas tight fitting of injectors. Ensure correct alignment with burners. Ensure all pipe joints are gas tight. MODEL Orifice Quantity UHD UHD UHD UHD UHD UHD UHD UHD [T][M][X][S][R] [T][M][X][S][R] [T][M][X][S][R] [T][M][X][S][R] [T][M][X][S][R] [T][M][X][S][R] [T][M][X][S][R] [T][M][X][S][R] 150 175 200 225 250 300 350 400 7 8 9 10 11 12 14 14 43 43 2.25 mm 2.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 15.3 Ignition Electrode and Flame Probe for Models UHD[T][M][X][S][R] 150-400 To replace the ignition 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.
SECTION 15: REPLACEMENT PARTS 15.4 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 [aluminized steel] [409 stainless steel]. 15.5 Flue Blower for Models UHD[T][M][X][S][R] 150-300 Remove screws securing outlet flange to the flue adapter. Refit in reverse order. Disconnect electrical connections at plug in tabs.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 15.6 Flue Blower for Models UHD[T][M][X][S][R] 350-400 Remove screws securing outlet flange to the flue adapter. Rear Panel Flue Adapter to Flue Blower screw Hole Refit in reverse order. Vent Box Flue Outlet Adapter Gasket Vent Box screws Flue Blower Disconnect electrical connections at plug in tabs. Vent Box Gasket Mounting Plate to Flue Blower screws Remove screws securing flue blower mounting plate to vent box.
SECTION 15: REPLACEMENT PARTS 15.7 Pressure Switch WARNING Carbon Monoxide Hazard Use correct pressure switch specified for each model. Use of incorrect pressure switch or disabling pressure switch circuit could cause unsafe condition. Failure to follow these instructions can result in death or serious injury. 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.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL SECTION 16: SPECIFICATIONS 16.1 Dimension Data for Models UHD[T][M][X][S][R] 150-250 Model UHA[T][M][X][S][R] UHA[T][M][X][S][R] UHA[T][M][X][S][R] UHA[T][M][X][S][R] UHA[T][M][X][S][R] 150 175 200 225 250 A in (cm) 42.4 (107.7) 42.4 (107.7) 42.4 (107.7) 42.4 (107.7) 42.4 (107.7) B in (cm) 26.7 (67.8) 26.7 (67.8) 35.0 (88.9) 35.0 (88.9) 35.0 (88.9) C in (cm) 25.5 (64.8) 25.5 (64.8) 25.5 (64.8) 25.5 (64.8) 25.5 (64.
SECTION 16: SPECIFICATIONS 16.2 General Technical Data Table Model Full Load Amps @ 120 V UHD UHD [T][M][X][S][R] [T][M][X][S][R] 150 175 UHD [T][M][X][S][R] 200 UHD [T][M][X][S][R] 225 UHD [T][M][X][S][R] 250 A 2 2 2 2 2 Minimum Air Volume CFM 1360 1400 2050 2100 2350 Temperature Rise @ Minimum Air Volume °F (°C) 83 (46) 95 (52) 73 (40) 80 (44) 80 (44) Heat Exchanger Pressure Drop @ Minimum Air Volume in wc 0.02 0.03 0.025 0.035 0.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 16.4 Dimension Data for Models UHD[T][M][X][S][R]300-400 Model UHD[T][M][X][S][R] in (cm) 300 UHD[T][M][X][S][R] in (cm) 350 UHD[T][M][X][S][R] in (cm) 400 52 of 55 A B C D E F G H J K L M N 52.3 132.8 52.3 132.8 52.3 132.8 43.2 109.7 43.2 109.7 43.2 109.7 25.5 64.8 25.5 64.8 25.5 64.8 24.7 62.7 24.7 62.7 24.7 62.7 19.4 49.3 19.4 49.3 19.4 49.3 1.25 3.2 1.25 3.2 1.25 3.2 7.0 17.8 7.0 17.8 7.0 17.8 11.2 28.4 11.2 28.
SECTION 16: SPECIFICATIONS 16.5 General Technical Data Table Model Full Load Amps @ 120 V UHD[T][M][X][S][R] 300 UHD[T][M][X][S][R] 350 UHD[T][M][X][S][R] 400 A 2 6 6 Minimum Air Volume CFM 2700 3120 3420 Temperature Rise @ Minimum Air Volume °F (°C) 86 (47) 86 (47) 86 (47) Heat Exchanger Pressure Drop @ Minimum Air Volume in wc 0.02 0.03 0.
UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 54 of 55
SECTION 17: THE ROBERTS GORDON® UHD-SERIES WARRANTY SECTION 17: THE ROBERTS GORDON® UHD-SERIES WARRANTY ROBERTS-GORDON LLC WILL PAY FOR: READ YOUR INSTALLATION, OPERATION AND SERVICE MANUAL Within 24 months from date of purchase by buyer or 27 months from date of shipment by Roberts-Gordon LLC (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.
