Roberts Gorden BH-150, BH-60, BH-40, BH-80 Unvented Operation, Horizontal Venting, Vertical Venting

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BH-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL

8.2 Unvented Operation

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).

Use of optional outside combustion air is not recommended with unvented heaters.

If exhaust fans are used to supply ventilation air, an interlock switch must be used to prevent the heater from coming on when the fans are off. This may be done using a pressure switch.

8.3 Horizontal Venting

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 Tjernlund VH1-4 (P/N 90502100) or equivalent, insulated vent terminal. Follow the manufacturer's instructions for proper installation.

For 6" (15 cm) common vents in either combustible or noncombustible walls, use Tjernlund VH1-6 (P/N 90502101) or equivalent, insulated vent terminal.

Follow the manufacturer's instructions for proper installation.

8.4 Vertical Venting

For 4'' (10 cm) common vent, an approved vent cap (P/N 90502300) must be used.

For 6'' (15 cm) common vent, an approved vent cap (P/N 90502302) must be used.

For common vertical venting of more than two heaters, See Page 38, Section 8.10.

A vent shall not extend less than 2' (0.6m) above the highest point where it passes through a flat roof of a building.

8.5 Unvented Operation Tube Termination

Turndown type vent terminal with a screen must be installed at the exhaust end of the tube. Vent terminal design shall not incorporate backdraft flap.

FIGURE 22: Tube Termination

8.6 Length Requirements

The maximum vent length allowed is 45' (13.7 m). The maximum outside air supply duct length allowed is 45' (13.7 m).

The total vent length, plus outside air duct length, plus any extensions to minimum heat exchanger lengths, cannot exceed 65' (19.8 m).

Vent length should be limited to less than 20' (6 m). If using vent lengths greater than 20' (6 m), condensation will form in the vent pipe. Insulation and additional sealing measures (high temperature silicone at all seams) are required. Optional heat exchanger beyond minimum lengths is considered as vent length for length determination.

Subtract 15' (4.6 m) of maximum allowed vent or duct length per vent elbow if more than two are used.

8.7 Horizontal Ventilation 4'' (10 cm) Pipe

 

 

SIDE VIEW

 

 

Combustible or

 

Non-Combustible Wall Only

 

Non-Combustible Wall

 

Vent Adapter

 

Vent Adapter

 

 

18" (46 cm)

 

 

 

 

 

 

Min.

4" (10 cm)

 

 

 

Single Wall Pipe

 

 

Vent Terminal

 

 

4" (10 cm) Single Wall Pipe

 

Vent Terminal

 

 

 

 

Description

Part Number

 

 

Vent Terminal (Comb. Wall)

90502100

 

 

Vent Terminal

02537801-XX

 

 

36 of 59

 

 

 

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Contents Property damage. Read the Installation, Operation Improper installation, adjustment, alteration, serviceOr maintenance can result in death, injury or Installation must be done by a contractor qualifiedPage Roberts-Gordon LLC Page Table of Figures Page Safety Labels and Their Placement Heater SafetyManpower Requirements California PropositionTop and Bottom Panel Label Placement Side and Back Panel Label Placement Installer Responsibility Wall TagNational Standards and Applicable Codes Maintain clearances to combustibles at all times for safety Clearances are the required distances thatCentimeters InchesC D Model45 Tilt Reflector Model Tube, Standard Reflector ModelTube, Opposite 45 Reflector Model Inches CentimetersVenting Inches Centimeters ModelNational Standards and Applicable Codes Burner Tube Major ComponentsStainless Steel Reflector End CapStandard Parts List Contents of BH-Series Burner CartonContents of Core and Extension Packages Core Packages Minimum Standard Aluminized BH-Series Component Package Guide Model Tubing LengthHeater Installation Typical Suspension Details Linear Heater Assembly Overview Linear Heater Layout Overview Burner Tube Installation Linear Heater Layout OverviewOpen Tube Clamp Package InstallationCoupling and Tube Assembly Closed1 Coupling and Tube Assembly 2 Coupling and Tube AssemblyTurbulator Installation Not required on the BH-125/150/175/200Hanger Burner Tube Reflector 1 Reflector, U-Clip and Reflector Support Installation Description Part Number Reflector Support PackageBurner Installation Optional Heater Accessories Tube, Standard TubeTube, Opposite Tube Heater Layout Overview Elbow Package Configuration .2.1 Elbow Installation Tube Layout Overview2 Elbow Installation 5 Reflector Joint Detail Reflector Joint DetailReflector Side Extension 1 Bracket Installation 2 Side Reflector InstallationDescription Part Number Lower Clearance Shield Package 2 Frame Shield Installation Distance a Extension2 Grille End Cap Installation 3 Grille InstallationVenting United States RequirementsCanadian Requirements Vertical Venting Unvented OperationHorizontal Venting Unvented Operation Tube TerminationVertical Ventilation 4 10 cm Pipe Common Side Wall VentingOutside Wall Common Vertical Venting Vertical Outside Air Supply for Single Heater Installation Outside Combustion Air SupplyVertical Outside Air Supply for Double Heater Installation Horizontal Outside Air Supply for Double Heater InstallationGAS Piping Hold gas nipple securely with pipe wrench When attaching gas hoseCorrect Positions Failure to follow these instructions can resultWiring Line Voltage Thermostat WiringLow Voltage Thermostat Wiring Front ViewInternal Wiring Ladder Diagram Electrical Connection to the Burner Sequence of Operation Operation and MaintenancePre-Season Maintenance and Annual Inspection To Shut Off HeaterObjects Vicinity of the HeaterVehicles and Other ReflectorMotor Burner Cup and Orifice Safety LabelsBlower Scroll, Wheel ElectrodeTroubleshooting Troubleshooting Flow Chart YESPage Manifold Gas Pressure Setting Replacement Parts Replacement Parts Description Part Number GAS Pressure AT Manifold General SpecificationsDimensions Pipe ConnectionPage ROBERTS-GORDON LLC will not PAY for Warranty is Void ifROBERTS-GORDON LLC will PAY for Limitations on Authority RepresentativesPage Page Page
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