Roberts Gorden 45 Standard Vented Heaters Models Uhax 30, Unvented Operation, Horizontal Venting

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SECTION 6: VENTING

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 17, Figure 9 through Page 20, Figure 14.

6.3.1Standard Vented Heaters (Models UHA[X] 30 - 125)

The vent must be fitted with a low resistance terminal. See Page 17, Figure 9 through Page 17, Figure 10. Standard vented heaters do not allow outdoor air intake for combustion air.

6.3.2Separated Combustion Heaters (Models UHA[X]S 30 - 125)

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 19, Figure 12. 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 19, Figure 13 and Page 20, Figure 14.

For seperated combustion installation, the vent and air intake must be fitted with an individual and correctly sized sealed system and the vent and air intake must terminate at approved wall and roof terminals.

Seperated combustion units may not be common vented. See Page 14, Section 6

6.4 Unvented Operation

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.

The heater must be vented when installed in residential buildings.

For unvented operation in commercial installations, sufficient ventilation must be provided in the amount of 4 cfm per 1000 Btu/h firing rate (United States); 3

cfm per 1000 Btu/h firing rate (Canada).

WARNING: Combustion by-products contain a chemical known to the State of California to cause cancer and birth defects or other reproductive harm.

6.5 Horizontal Venting

Horizontally vented heaters must be individually vented.

Vent pipe must be sloped ¼" (.6 cm) for every 1' (.3 m). For vent lengths greater than 5' (1.5 m), condensation will form. Insulation is recommended and condensation drains may be desired.

In noncombustible walls only, vent terminal (P/N 02537801-1P) may be used.

For 4'' (10 cm) vents in either combustible or noncombustible walls, use vent terminal (P/N 90502100) or equivalent insulated vent terminal. Follow the manufacturer's instructions for proper installation.

Instead of an insulated vent terminal, a listed thimble (with 2" (5 cm) air gap) may be used with a 4" (10 cm) vent cap (P/N 90502102).

In the State of Massachusetts, the following regulations apply to horizontally-vented heaters certified for installation in structures used in whole or in part for residential purposes (UHA 30-75 only) and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches:

Installation of Carbon Monoxide Detectors: At the time of installation of the side wall horizontal vented gas fueled equipment, the installing plumber or gasfitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back- up is installed on the floor level where the gas equipment is to be installed. In addition, the installing plumber or gasfitter shall observe that a battery operated or hard wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building or structure served by the side wall horizontal vented gas fueled equipment. It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard wired carbon monoxide detectors

•In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard wired carbon monoxide detector with alarm and battery back- up may be installed on the next adjacent floor level.

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Contents Blackheat Page Roberts-Gordon LLC Page Table of Figures Page Heater Safety Manpower RequirementsSafety Labels and Their Placement UHA 30 45 Label Placement UHA 60 75 Label Placement UHA 100 125 Label Placement Wall Tag Installer ResponsibilityCorrosive Chemicals National Standards and Applicable CodesCritical Considerations 3.1 Basic Information Minimum Required Installation ClearancesManufactured Units Clearances to CombustiblesGas Supply Electrical SupplyVent National Standards and Applicable Codes High Altitude Major Components 5.1 General Shelf Mounting and SuspensionWall Mounting Suspension Methods Wall Shelf Mounting and Hanging Suspension Vertical Louvers Optional Venting Vent InstallationChanging Vent and Air Intake Orientation United States RequirementsSeparated Combustion Heaters Models Uhaxs 30 Standard Vented Heaters Models Uhax 30Unvented Operation Horizontal VentingLength Requirements Vertical VentingMaximum Vent Lengths Vent MaterialVent and Roof Detail Standard Vented Heater Common Vertical Vent Termination Concentric Vent Box Vertical Unvented Installation Separated Combustion InstallationAIR Supply Building VentilationConnections GAS PipingPositioning Thermostats WiringFan Control Low Voltage Thermostat with One HeaterLow Voltage Thermostat with Multiple Heaters 30 Low Voltage Thermostat with Multiple Heaters 60 Transformer Internal Wiring DiagramFlame Ladder Wiring DiagramElectrical Connection to the Heater Operation and Maintenance Pressure Regulator Gas Outlet Outlet Pressure Pressure Switch Check Gas RateTurning Off the Heater Instruction to the User Complete Start-UpUser Instructions User InstructionsHeater Operation Lighting Instructions 11.4.1 To Turn On HeaterSimple Troubleshooting Simple Troubleshooting Burner FaultsTo Turn the Heater Off Servicing Venting and Air Intake Pipe Maintenance ChecklistVicinity of the Heater Vehicles and OtherCombustion Air Intake When installed Wall TagPipe Heat ExchangerTroubleshooting 13.1 General Conduct start-up procedure as shown on Page 29, Section Troubleshooting For Automatic Ignition Burner SystemsTroubleshooting for Flame Supervision System Troubleshooting for Flue Blower Troubleshooting for Gas ValvesBurner Components Replacement PartsBurner Injectors Burner CompartmentIgnition Electrode and Flame Probe Re-used Louver and Louver SpringsFlue Blower Vertical Installation Ignition Control Axial Fan/Guard/Motor AssemblyFan Removal and Replacement To Replace the Fan AssemblyLimit Switches Removal and Replacement Model Uhaxs Specifications 15.1 Dimension DataTechnical Data Table All Models General Technical Data Table All ModelsRoberts Gordon will not PAY for Warranty is Void ifRoberts-Gordon Limitations on Authority RepresentativesPage Owner Warranty Registration Card Page Page Some objects can catch fire or explode when placed
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60, 30, 45, 125, 100 specifications

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