Bh series the economical, unitary infrared heater (41 pages)
Summary of Contents for Roberts Gorden Combat 150
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Combat ® UHA-Series Tubular Unit Heaters (Standard Range) Installation, Operation & Service Manual Models UHA[S] 150, 175, 200, 225 250, 300, 350, 400 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. Owner Keep this manual in a safe place in order to provide your serviceman with necessary information.
SECTION 1: H EATER AFETY 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.
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL 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 electrical supplies, in accordance with applicable specifications and codes.
SECTION 3: C RITICAL ONSIDERATIONS SECTION 3: CRITICAL CONSIDERATIONS 3.1 Basic Information 3.7 Electrical Supply UHA(S) heaters have automatic ignition burners for A permanent 120 V 60 Hz 1 Ø electrical supply is ON/OFF operation only. required for the main electrical power. The heater also requires suitable controls in accordance with Section 9.
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL Figure 1: Installation Clearances and Clearances to Combustibles * Recommended mounting height varies with heater input. Clearance to Vent: 2" (5 cm) Heaters may be mounted at a higher level if destratification fans are installed.
SECTION 4: N ATIONAL TANDARDS AND PPLICABLE ODES SECTION 4: NATIONAL STANDARDS AND APPLICABLE CODES 4.1 Gas Codes 4.3 Parking Structures and Repair Garages The type of gas appearing on the nameplate Installation in garages must be in accordance must be the type of gas used. Installation must with the following codes: comply with national and local codes and United States: Standard for Parking Structures...
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL 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 handling or supporting the heater from below, ensure that the weight is taken at the support points.
SECTION 6: V ENTING SECTION 6: VENTING 6.1 Venting mechanical air supply inlet to any building. This heater must be vented in accordance with the The vent shall not terminate within 3' (.9 m) of a rules contained in this manual and with the following window or door that can be opened in any building, national codes and any state, provincial or local any non-mechanical air supply inlet to any building,...
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL 6.2.2 Separated Combustion Heaters 6.5 Vertical Venting (Models UHAS 150 - 400) Vertically vented heaters can be common vented The heaters are designed to be installed as (up to 4 heaters). separated combustion heaters.
SECTION 6: V ENTING 6.7 Vent Material Figure 3: Vent and Roof Detail 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"...
SECTION 7: A UPPLY 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 distribution fan.
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL SECTION 8: GAS PIPING • Meter and service must be large enough to handle all the burners being installed plus any other connected load. The gas pipe which feeds the system must be large enough to supply the required gas with a maximum pressure drop of 1/2"...
SECTION 9: W IRING SECTION 9: WIRING codes in accordance with: United States: refer to ® National Electrical Code ANSI/NFPA 70 - latest revision Canada: refer to Canadian Electrical Code CSA C22.1 Part I - latest revision. 9.1 Positioning Thermostats A room thermostat or ROBERTS GORDON ®...
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL 9.3 UHA(S) Series Internal Wiring Diagram 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 and 600 volts.
SECTION 9: W IRING 9.4 UHA(S) Series Ladder Wiring Diagram 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 and 600 volts.
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL 9.5 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.
SECTION 10: O PERATION AND AINTENANCE SECTION 10: OPERATION AND MAINTENANCE Installation, service, and annual inspection of the 10.1.2 Electrical Checks heater must be done by a contractor qualified in the All pre-start-up checks must be carried out before installation and service of gas-fired heating start-up the heater.
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL Figure 10: Automatic Burner Control Sequence If at any stage the flame fails, the control will retry for ignition. The control has four trials for ignition before a one hour lockout. Figure 11: Gas Valve for Models UHA(S) 150 - 400 Top View Regulator...
SECTION 10: O PERATION AND AINTENANCE 10.2.2 Start-Up the Gas Valve (All Gases) 10.2.5 External Controls 10.2.2.1 Check Burner Gas Pressure External controls may include time switch, interlock switch, room thermostat and frost thermostat. 1. Remove the plug in the outlet (burner) pressure Operate each control to ensure that they function test point and connect a pressure tap and a correctly.
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL SECTION 11: USER INSTRUCTIONS 11.1 User Instructions 11.5 Simple Troubleshooting The UHA(S) Series heaters are fully automatic and Some possible reasons for the heater not operating operate from the external controls fitted on site. are: 1.
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL SECTION 12: SERVICING 12.1 Servicing Instructions 12.3 Fan/Motor Assembly Maintenance After start-up, the heater will require maintenance to The main fan bearings are permanently sealed and be carried out annually. If the heater is used in a do not need lubrication.
SECTION 12: S ERVICING 12.8 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 Roberts-Gordon and conform to all requirements set forth in the ROBERTS GORDON ®...
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COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL Burner Observation Make sure it is clean and free of cracks or holes. Window Clean and replace as required. Combustion Fan Scroll, Compressed air or a vacuum cleaner may be used to clean dust and dirt. Wheel and Motor Inshot Burners and Clear of obstructions (even spider webs will cause problems).
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL 13.2 Troubleshooting For Automatic Ignition Burner Systems For your safety and optimum heater performance, use only ROBERTS GORDON ® replacement parts. Conduct start-up procedure as shown on Page 19, Section 10.
SECTION 13: T ROUBLESHOOTING 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. NOTE: Minimum flame probe current 1 μA DC. Typical flame probe current 3-5 μA DC.
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL 13.4 Troubleshooting for Gas Valves 13.5 Troubleshooting for Combustion Fan For your safety and optimum heater performance, use only genuine ROBERTS GORDON ® replacement parts. Conduct start-up procedure as shown on Page 19, Section 10.
SECTION 14: R EPLACEMENT ARTS 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.
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL 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. 14.2.1 Burner Injectors Ensure gas tight fitting of injectors.
SECTION 14: R EPLACEMENT ARTS 14.3 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.
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL 14.4 Combustion Fan Vertical Installation Remove screws securing outlet flange to the flue adapter. Refit in reverse order. Remove screws securing flue fan mounting plate to vent box. Remove screws securing mounting plate to fan.
SECTION 14: R EPLACEMENT ARTS 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. Carry out a commission after working on or changing a pressure switch.
COMBAT ® UHA U EATER NSTALLATION PERATION AND ERVICE ANUAL 14.6 Ignition Control 14.8 Limit Switches The control mounts to the electrical plate. Pull out 14.8.1 Removal and Replacement ignition cable and wiring from board, noting their 1. Remove the electrical connections to the positions.
® ® SECTION 16: T ROBERTS GORDON COMBAT UHA-S ® The data plate and/or serial number are removed, SECTION 16: THE ROBERTS GORDON defaced, modified or altered in any way. ® COMBAT UHA-SERIES WARRANTY ® ® The ownership of the ROBERTS GORDON COMBAT ROBERTS-GORDON WILL PAY FOR: UHA-Series is moved or transferred.