Roberts-Gordon 250 - Manuals

Page 3 - TABLE OF CONTENTS; SECTION 16: The ROBERTS GORDON

© 2007 Roberts-Gordon, LLC All rights reserved. No part of this work covered by the copyrights herein may be reproduced or copied in any form or by any means - graphic, electronic, or mechanical, including photocopying, recording, taping or information storage and retrieval systems - without the wri...

Page 5 - TABLE OF FIGURES; Figure 1: Installation Clearances and Clearances to

TABLE OF FIGURES Figure 1: Installation Clearances and Clearances to Combustibles ............................................................. 4 Figure 2: Suspension Methods ................................................. 6Figure 3: Vent and Roof Detail ..............................................

Page 7 - SECTION 1: HEATER SAFETY; Your Safety is Important to Us!; Manpower Requirements

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 - SECTION 2: INSTALLER RESPONSIBILITY; through Page; Corrosive Chemicals; CAUTION; Do not use heater in an area containing corrosive; * Halogenated Hydrocarbons; National Standards and Applicable Codes

COMBAT ® UHA U NIT H EATER 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-Gordon r...

Page 9 - Figure 2

SECTION 3: C RITICAL C ONSIDERATIONS 3 SECTION 3: CRITICAL CONSIDERATIONS 3.1 Basic Information UHA(S) heaters have automatic ignition burners for ON/OFF operation only. 3.2 Location and Suspension All models: • Must be installed indoors. • Must be installed in a level position with horizontal disch...

Page 10 - WARNING; Fire Hazard; COMBAT; Clearances to Combustibles; Wall; Top; Installation Clearances; combustion concentric; * Recommended mounting height varies with heater input.

WARNING Fire Hazard Some objects will catch fire or explode when placed close to heater.Keep all flammable objects, liquids and vapors the required clearances to combustibles away from heater.Failure to follow these instructions can result in death, injury or property damage. COMBAT ® UHA U NIT H EA...

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 nameplate must be the type of gas used. Installation must comply with national and local codes and requirements of the local gas company. United ...

Page 12 - SECTION 5: MAJOR COMPONENTS; Heaters are designed for installation above 6'; Crush Hazard; Figure 2: Suspension Methods

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 6 SECTION 5: MAJOR COMPONENTS 5.1 General Heaters are designed for installation above 6' (1.8 m). These heaters must be installed within the heated space. Duct delivery systems are not permitted with axial fan units. When handl...

Page 13 - and; Vent Installation; Figure 8

SECTION 6: V ENTING 7 SECTION 6: VENTING 6.1 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 Z223.1 - latest revision, Nationa...

Page 14 - See Page 12, Figure 8; Unvented Operation; Combustion by-products contain a; Horizontal Venting; In noncombustible walls only, vent terminal; Length Requirements

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 8 6.2.2 Separated Combustion Heaters (Models UHAS 150 - 400) The heaters are designed to be installed as separated combustion heaters. The vent and air intake are run as separate pipes to the wall or roof terminals. See Page 12...

Page 15 - Figure 3: Vent and Roof Detail; Vertical

SECTION 6: V ENTING 9 6.7 Vent Material Vent material may be single wall 26 ga. (minimum) galvanized steel or equal thickness stainless steel. Completely seal all joints, refer to Page 7, Section 6.2 . If penetrating a combustible wall or roof, a listed thimble with 2" (5 cm) clearance must be u...

Page 16 - TOP VIEW

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 10 Figure 5: Standard Vented Heater - Common Vertical Vent Termination Roof 18" (46 cm) Min. Type "B" vent cap (7" or 8") may be used. (These are not available from Roberts-Gordon.) Roof Flashing Approved Th...

Page 17 - Figure 7: Concentric Vent Box; qu

SECTION 6: V ENTING 11 Figure 6: Separated Combustion Heater - Vertical and Horizontal Vent Termination Vent Termination Listed Thimble through Combustible Wall Vent 12" (31 cm) Minimum from wall to vent termination. Air Intake Condensate Trap to Drain (Optional) 12" (31 cm) Minimum from air...

Page 18 - Figure 8: Concentric Vertical and Horizontal Vent Termination; Vent; - Separated Combustion Heater

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 12 Figure 8: Concentric Vertical and Horizontal Vent Termination Vent Air Intake* Concentric Vent Box Vertical Option 10' (3 m) Maximum Horizontal Option Concentric Vent Box Vent Combustion Air Terminal Vent Terminal with Baffl...

Page 19 - SECTION 7: AIR SUPPLY; Building Ventilation; Follow the constraints listed

SECTION 7: A IR S UPPLY 13 SECTION 7: AIR SUPPLY 7.1 Separated Combustion Installation When installed as a separated combustion heater, the air for combustion is drawn in from outside the building. It is important to ensure that there is adequate space around heater to provide air for the axial air ...

Page 20 - SECTION 8: GAS PIPING; To reduce

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 14 SECTION 8: GAS PIPING WARNING Fire Hazard Connect gas supply according to Figure 9. Gas can lea k if not installed properly. Failure to follow these instructions can result in death, injury or property damage. Fire Hazard Co...

Page 21 - Electrical Shoc; Positioning Thermostats; A room thermostat or ROBERTS GORDON; Low Voltage Thermostat with One Heater

SECTION 9: W IRING 15 SECTION 9: WIRING WARNING Electrical Shoc k Hazard Disconnect electrical power 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 shoc k . All heater mo...

Page 24 - Electrical Connection to the Heater; Junction box is not provided with heater.

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 18 9.5 Electrical Connection to the Heater BX Connector Junction Box Flexible Conduit Burner Connect wires together with suitable approved wire connectors. Green to Ground White to L2 Black to L1 L1L2 Ground Black White Green N...

Page 25 - SECTION 10: OPERATION AND MAINTENANCE

SECTION 10: O PERATION AND M AINTENANCE 19 SECTION 10: OPERATION AND MAINTENANCE Installation, service, and annual inspection of the heater must be done by a contractor qualified in the installation and service of gas-fired heating equipment. Read this manual carefully before installation, operation...

Page 26 - Figure 10: Automatic Burner Control Sequence; Burner Sequence for Ignition Control; *Purge time begins at pressure switch change over.; Top Vie

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 20 Figure 10: 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 Si...

Page 27 - on; Check Gas Rate

SECTION 10: O PERATION AND M AINTENANCE 21 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 adjus...

Page 28 - Electrical Shock Hazard; LED INDICATION FAULT MODE

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 22 SECTION 11: USER INSTRUCTIONS 11.1 User Instructions The UHA(S) Series heaters are fully automatic and operate from the external controls fitted on site. WARNING Electrical Shock Hazard Disconnect electrical power before ser...

Page 30 - through

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 24 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 necessary. WA...

Page 31 - Maintenance Checklist; Installation Code and Annual Inspections:; See Page 3, Section 3; Heat Exchanger; See Page 14, Section 8

SECTION 12: S ERVICING 25 12.8 Maintenance Checklist WARNING Explosion Hazard 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 ma...

Page 32 - Thermostat

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 26 Burner Observation Window Make sure it is clean and free of cracks or holes. Clean and replace as required. Combustion Fan Scroll, Wheel and Motor Compressed air or a vacuum cleaner may be used to clean dust and dirt. Inshot...

Page 33 - SECTION 13: TROUBLESHOOTING; Start

SECTION 13: T ROUBLESHOOTING 27 SECTION 13: TROUBLESHOOTING 13.1 General Ensure proper air flow clearance for axial fan. Open louvers slightly. Replace axial fan if it does not operate. If problems persist, contact Roberts-Gordon, LLC at www.rg-inc.com Heater Operating TROUBLESHOOT ENDS. No Replace ...

Page 34 - Troubleshooting For Automatic Ignition Burner Systems; Conduct start-up procedure as shown; on Page

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 28 13.2 Troubleshooting For Automatic Ignition Burner Systems If problems persist, contact Roberts-Gordon, LLC at www.rg-inc.com Heater Operating TROUBLESHOOT ENDS. No Trace fault in supervision system. See Troubleshooting for ...

Page 35 - Troubleshooting for Flame Supervision System; START

SECTION 13: T ROUBLESHOOTING 29 13.3 Troubleshooting for Flame Supervision System NOTE: Minimum flame probe current 1 μA DC. Typical flame probe current 3-5 μA DC. Repair or replace as necessary. If problems persist, contact Roberts-Gordon, LLC at www.rg-inc.com Replace ignition control. Use General...

Page 36 - Troubleshooting for Gas Valves; Troubleshooting for Combustion Fan

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 30 13.4 Troubleshooting for Gas Valves Valve faulty. Replace with one of correct type. Fault elsewhere. Correct pressure problem. If problems persist, contact Roberts-Gordon, LLC at www.rg-inc.com Valve Operating TROUBLESHOOT E...

Page 37 - SECTION 14: REPLACEMENT PARTS; See

SECTION 14: R EPLACEMENT P ARTS 31 SECTION 14: REPLACEMENT PARTS See warnings and notes on Page 24, Section 12 before removing or replacing 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 th...

Page 38 - Burner Compartment; Unscrew; Burner Injectors; MODEL

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 32 14.2 Burner Compartment Remove flexible air duct from spigot Remove access plate Remove screws and pull off burner cover Viewing port for flame probe Viewing port for ignition electrode Flame probe Burner compartment cover R...

Page 39 - Ignition Electrode and Flame Probe; front view of the burner compartment.

SECTION 14: R EPLACEMENT P ARTS 33 14.3 Ignition Electrode and Flame Probe Flame Probe Ignition Electrode Remove Screw Ignition Electrode Burners Flame Probe Burners Burner Compartment Front Views Remove all burner compartment screws to remove the burner compartment and access the "Front View...

Page 40 - Combustion Fan Vertical Installation; Refit in reverse order.; Carry out a start-up after working on or changing a combustion fan.

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 34 14.4 Combustion Fan Vertical Installation Vent Box Outlet Gasket Flue Fan Vent Box Screws Flue Adapter Flue Adapter to Flue Fan screws Rear Panel Hole Disconnect electrical connections at plug in tabs. Mounting Plate to Vent...

Page 41 - See Page 19, Section

SECTION 14: R EPLACEMENT P ARTS 35 14.5 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. Carbon M onoxide Hazard Use correct pressure switch...

Page 42 - Ignition Control; Remove the screws; and Replacement

COMBAT ® UHA U NIT H EATER I NSTALLATION O PERATION AND S ERVICE M ANUAL 36 14.6 Ignition Control The control mounts to the electrical plate. Pull out ignition cable and wiring from board, noting their positions.Release the four mounting standoffs.Refit in reverse. Ensure correct location of ignitio...

Page 43 - SECTION 15: SPECIFICATIONS; Rear View

SECTION 15: S PECIFICATIONS 37 SECTION 15: SPECIFICATIONS 15.1 Standard (Models 150 - 400) UHA(S) Series Dimension Data A B Rear View End View Z 25 1/2" (65 cm) 6 1/2" (17 cm) Gas Supply F G H Top View I E C D 77 Heater must be supported at these points from above or below. 19 3/8" (49 c...

Page 45 - SECTION 16: THE ROBERTS GORDON

SECTION 16: T HE ROBERTS GORDON ® COMBAT ® UHA-S E - 39 SECTION 16: THE ROBERTS GORDON ® COMBAT ® UHA-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 p...

Page 48 - Attach this information to the wall near the ROBERTS GORDON

10' (3 m) WARNING © 2007 Roberts-Gordon, LLC www.rg-inc.com Printed in U.S.A. P/N 91040031 Rev B Attach this information to the wall near the ROBERTS GORDON ® heater Read the Installation, Operation and Service Manual thoroughly before installation, operation or service. OPERATING INSTRUCTIONS 1. ST...