Page 3 - TABLE OF CONTENTS; SECTION 16: ROBERTS GORDON
© 200 8 Ro b erts-Gordon LLC All rights reser v ed. N o part of this w ork co v ered b y the copyrights herein may b e reprod u ced or copied in any form or b y any means - graphic, electronic, or mechanical, incl u ding photocopying, recording, taping or information storage and retrie v al systems ...
Page 5 - TABLE OF FIGURES; Figure 8: Standard Vented Heater - Common Vertical Vent
TABLE OF FIGURES Figure 1: Clearances to Combustibles ...................................... 3Figure 2: Air Flow Direction ....................................................... 7Figure 3: Suspension Methods ................................................. 8Figure 4: Shelf-Mounting Methods ..........
Page 7 - SECTION 1: HEATER SAFETY
SECTION 1: H EATER S AFETY 1 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 ...
Page 8 - UHD L; SECTION 2: INSTALLER RESPONSIBILITY; * Halogenated Hydrocarbons; National Standards and Applicable Codes
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 2 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-Go...
Page 9 - Manufactured Units; See; Minimum Required Installation Clearances; WARNING
SECTION 3: C RITICAL C ONSIDERATIONS 3 SECTION 3: CRITICAL CONSIDERATIONS3.1 Basic Information 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% th...
Page 10 - See Page; Electrical Supply; See Page 10, Section 6
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 4 3.6 Ventilation It is important to ensure that there is adequate air space around the heater to supply air for combustion, ventilation and distribution in accordance with local and national codes. See Page 10, Section 6...
Page 11 - SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES; , local ordinances and any special
SECTION 4: N ATIONAL S TANDARDS AND A PPLICABLE C ODES 5 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...
Page 13 - Figure 2; Figure 2: Air Flow Direction; AIR FLO
SECTION 5: D UCT H EATER I NSTALLATION 7 SECTION 5: DUCT HEATER INSTALLATION 5.1 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 ...
Page 14 - Shelf Mounting and Suspension; For typical shelf mounting on existing shelf,; Figure 3: Suspension Methods; Crush Hazard; qu; Unistr; Nu
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 8 5.2 Shelf Mounting and Suspension Four suspension points (3/8" nuts) are located on the top of the heater. Drop rods must be 3/8" diameter mild steel. When handling or supporting the heater from below, ensure th...
Page 15 - Figure 5: Wall Shelf Mounting and Suspension; Hardware provided to construct mounting bracket assembly only.
SECTION 5: D UCT H EATER I NSTALLATION 9 Figure 4: Shelf-Mounting Methods Figure 5: Wall Shelf Mounting and Suspension Shelf Mo u nting Brackets Description Part Number Qty. Shelf Mounting Bracket Kit 120110 0 0K Shelf Mounting Bracket 11111510 2 Screw #10 x 1/2" Type AB Phil HWH Z 94311008 2 Ex...
Page 16 - Changing Vent and Air Intake Orientation; Refer to; Vent Installation; . For vented units, the vent must terminate
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 10 SECTION 6: VENTING 6.1 Changing Vent and Air Intake Orientation The heater is sold with rear horizontal vent and air intake connections as standard. (Only separated combustion models have air intake connection). If ver...
Page 17 - For vent termination; Unvented Operation; Combustion by-products contain a; Horizontal Venting
SECTION 6: V ENTING 11 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 13, Figure 6 through Page 16, Figure 11 . 6.3.1 Standard Vented Heaters (Models UHD[X][R] 75 - 125) The vent must be fitted with a low res...
Page 19 - Figure 6: Vent and Roof Detail
SECTION 6: V ENTING 13 Figure 6: Vent and Roof Detail Figure 7: Standard Vented Heater - Vertical and Horizontal Vent Termination Model Vent Diameter Part Number UHD[X][R] 75 - 125 4" (10 cm) 90502102
Page 21 - Figure 10: Concentric Vent Box
SECTION 6: V ENTING 15 Figure 9: Separated Combustion Heater - Vertical and Horizontal Vent Termination Figure 10: Concentric Vent Box Model Air Intake & Vent Diameter Part Number UHD[X]S[R] 75 - 125 4" (10 cm) 90502102 4" (10 cm) Single W all V ent Pipe (By Others) Seal joint b et w een...
Page 23 - Unvented Installation; Building Ventilation; If the building has a slight negative
SECTION 7: A IR S UPPLY 17 SECTION 7: AIR SUPPLY7.1 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 suppl...
Page 24 - SECTION 8: GAS PIPING
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 18 SECTION 8: GAS PIPING A gas meter is connected to the service pipe by the gas supply company. An existing meter should be checked, preferably by the company, to ensure that the meter is adequate for the rate of gas sup...
Page 25 - Positioning Thermostats; for wall tag details.; Low Voltage Thermostat with One Heater
SECTION 9: W IRING 19 SECTION 9: WIRING All heater models require constant 120 V/1Ø/ 60 Hz power supply. Check heater rating plate for electrical rating for proper circuit sizing. For servicing, a disconnect switch of proper electrical rating should be installed in the vicinity of the heater. All he...
Page 26 - Internal Wiring Diagram
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 20 9.3 Internal Wiring Diagram 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...
Page 27 - Ladder Wiring Diagram; PRESSURE SWITCH; THERMOSTAT CONNECTION
SECTION 9: W IRING 21 9.4 Ladder Wiring Diagram 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. For supply conn...
Page 28 - Electrical Connection to the Heater; Junction box is not provided with heater.
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 22 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. BX Connector Junction Box ...
Page 29 - SECTION 10: OPERATION AND MAINTENANCE; Check that all site wiring is connected in
SECTION 10: O PERATION AND M AINTENANCE 23 SECTION 10: OPERATION AND MAINTENANCE Read this manual carefully before installation, operation, or service of this equipment. All components are accessed via the door secured by four sheet metal screws. Opening the door exposes live electrical connections ...
Page 30 - Figure 13: Automatic Burner Control Sequence; rge time; TOP VIEW
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 24 Figure 13: Automatic Burner Control Sequence Figure 14: Gas Valve B u rner Se qu ence for Ignition Control Flame Signal Start Gas V al v e Ignition Spark Thermostat 24 V SHUT DO WN RU N START ts = 10 Seconds Signals O ...
Page 31 - Check Gas Rate; through Page
SECTION 10: O PERATION AND M AINTENANCE 25 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. To adjust...
Page 32 - SECTION 11: USER INSTRUCTIONS; Ensure that the electrical and gas supplies to; Reset Button
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 26 SECTION 11: USER INSTRUCTIONS 11.1 User Instructions The UHD[X][S][R] Series heaters are fully automatic and operate from the external controls fitted on site. The only user control at the heater is the ManualReset Lim...
Page 33 - Simple Troubleshooting; The time and/or temperature controls are not; Figure 16: LED Diagnostic Codes; LED INDICATION FAULT MODE
SECTION 11: U SER I NSTRUCTIONS 27 11.4.2 To Turn Heater Off Set the thermostat to the "OFF" position.The burner will turn off immediately.To restart, turn the thermostat above room temperature. 11.5 Simple Troubleshooting Some possible reasons for the heater not operating are: 1. Gas supply...
Page 34 - through
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 28 SECTION 12: SERVICING 12.1 Servicing Instructions After start-up, the heater will require maintenance to be carried out annually. If the heater is used in a dirty or dusty area, more frequent maintenance may be require...
Page 35 - Maintenance Checklist; The Vicinity of the Heater; See Page 3, Section 3; Heat Exchanger; See Page 18, Section 8
SECTION 12: S ERVICING 29 12.7 Maintenance Checklist Installation Code and Annual Inspections: All installations and service of ROBERTS GORDON ® equipment must be performed by a contractor qualified in the installation and service equipment sold and supplied by Rober ts-Gordon and conform to all req...
Page 37 - START
SECTION 13: T ROUBLESHOOTING 31 SECTION 13: TROUBLESHOOTING13.1 General Ens u re air flo w thro u gh the heat exchanger is appropriate per the rating plate. If pro b lems persist, contact Ro b erts-Gordon, LLC at www .rg-inc.com Heater Operating TROUBLESHOOT ENDS. N o Replace limit s w itch. The lim...
Page 38 - Troubleshooting For Automatic Ignition Burner Systems; Conduct start-up procedure as shown
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 32 13.2 Troubleshooting For Automatic Ignition Burner Systems If pro b lems persist, contact Ro b erts-Gordon LLC at www .rg-inc.com Heater Operating TROUBLESHOOT ENDS. N o Trace fa u lt in s u per v ision system. See Tro...
Page 39 - Troubleshooting for Flame Supervision System; Minimum flame probe current 1
SECTION 13: T ROUBLESHOOTING 33 13.3 Troubleshooting for Flame Supervision System NOTE: Minimum flame probe current 1 μ A DC. Typical flame probe current 3-5 μ A DC. Repair or replace as re qu ired. If pro b lems persist, contact Ro b erts-Gordon LLC at www .rg-inc.com Replace ignition control. Use ...
Page 40 - Troubleshooting for Gas Valves
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 34 13.4 Troubleshooting for Gas Valves 13.5 Troubleshooting for Flue Blower V al v e fa u lty. Replace w ith one of correct type. Fa u lt else w here. Correct press u re pro b lem. If pro b lems persist, contact Ro b erts...
Page 41 - SECTION 14: REPLACEMENT PARTS
SECTION 14: R EPLACEMENT P ARTS 35 SECTION 14: REPLACEMENT PARTS Burner Components All serviceable burner parts are accessed by the door on the side of the heater. Remove the sheetmetal screws. 14.1 Gas Valve Remove the gas supply pipe at the heater inlet. Follow steps in Section 14.2 and Section 14...
Page 42 - Burner Compartment; MODEL
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 36 14.2 Burner Compartment 14.2.1 Burner Injectors Remo v e flexi b le air d u ct from spigot V ie w ing port for flame pro b e Flame Pro b e B u rner CompartmentCo v er Ignition Electrode Remo v e scre w s and p u ll off...
Page 43 - Ignition Electrode and Flame Probe; Ignition
SECTION 14: R EPLACEMENT P ARTS 37 14.3 Ignition Electrode and Flame Probe 14.4 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 s...
Page 44 - Flue Blower Vertical Installation; Carry out a star t-up after working on or changing a flue blower.; Refit in reverse order.; NOTE
UHD L OW P ROFILE D UCT F URNACE I NSTALLATION O PERATION AND S ERVICE M ANUAL 38 14.5 Flue Blower Vertical Installation IT IS IMPORTANT THAT ONLY THE CORRECT FLUE BLOWER SPECIFIED FOR EACH MODEL TYPE IS USED WHEN REPLACING THESE ITEMS. Carry out a star t-up after working on or changing a flue blowe...
Page 45 - Carry out a start-up after working on or changing a pressure switch.; Ignition Control; Remove the electrical connections to the switch.
SECTION 14: R EPLACEMENT P ARTS 39 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...
Page 47 - General Technical Data Table
SECTION 15: S PECIFICATIONS 41 15.2 General Technical Data Table *Do not exceed the maximum length of flue stated or heater may not operate properly. 15.3 Technical Data Table Model UHD[X][S][R] 75 UHD[X][S][R] 100 UHD[X][S][R] 125 Full Load Amps @ 115 V A 1 2 2 Minimum Air Volume CFM 850 950 1020 T...
Page 49 - COMBAT
SECTION 16: ROBERTS GORDON ® COMBAT ® UHD-S ERIES W ARRANTY 43 SECTION 16: ROBERTS GORDON ® COMBAT ® UHD-SERIES WARRANTY ROBERTS GORDON ® WILL PAY FOR: Within 24 months from date of purchase by buyer or 27 months from the date of shipment by Roberts-Gordon (whichever comes first), replacement parts ...
Page 51 - OWNER WARRANTY REGISTRATION CARD; at; Mail o; nu; W a r m A i r H e a t i n g
® OWNER WARRANTY REGISTRATION CARD Abou t t he Owner: Name:__________________________________________________________________________________________________Add r ess:______________________________________City:_________________________ S tate:__________Zip Code:________ Pho n e:_____________________...
Page 54 - Attach this information to the wall near the ROBERTS GORDON
WARNING © 200 8 Ro b erts-Gordon LLC www .rg-inc.com Printed in U.S.A. P/ N 91039 8 31 Attach this information to the wall near the ROBERTS GORDON ® heater Read the Installation, Operation and Service Manual thorou g hly before installation, operation or service. OPERATING INSTRUCTIONS 1. STOP! Read...
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