Roberts Gorden 250, 200, 350, 150, 400, 300, 225, 175 service manual GAS Piping, Connections

Page 20

COMBAT® UHA UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

SECTION 8: GAS PIPING

WARNING

Fire Hazard

Connectgassupplypplyaccordingto toFigureFigure9. 9.

Gascanleakkififnotnotinstalledproperlyperly. .

Failuretofollowtheseinstructionscanresultinindeath, injuryororporpertypropertydamage. .

It is important that the gas supply pipe and the electrical connections do not support any of the heater’s weight.

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 supply required.

Installation pipes must be fitted in accordance with local and national codes. Pipes of smaller size than the heater inlet gas connection should not be used.

8.1 Connections

Connect the heater to the gas supply ensuring that the final connections are as follows:

•Gas supply pipe work is run in medium or heavy gauge tubing in compliance with local and national codes.

Figure 9: Gas Connection

•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" w.c. When gas piping is not included in the layout drawing, contact the local gas supplier.

•An isolating valve and union connection should be used and fitted into the supply adjacent to the heater.

•A minimum 1/8" NPT plugged tapping accessible for test connection must be installed immediately upstream of the gas supply connection to the heater.

•For suspended heaters, an approved metal flexible connection between the isolating valve and the heater may be used. To reduce pressure loss, use one pipe size larger than the heater gas connection.

IMPORTANT - The complete installation must be purged and tested for gas soundness in accordance with local and national codes.

•Do not high pressure (in excess of 1/2 psi [14" w.c.]) test the gas piping with the burner connected. Close manual shut-off valve during any pressure testing equal to or less than 1/2 psi (14" w.c.). Failure to follow these

instructions can result in property damage. Check the pipe and tubing ends for leaks before placing heating equipment into service. When checking for gas leaks, use a soap and water solution; never use an open flame.

•Hold gas nipple securely with pipe wrench when attaching the flex gas connector.

•Do not twist flexible gas connector.

•Ensure all

joints are gas tight.

 

Option A:

Do not bend flexible

Stainless Steel

Flex Gas

gas connector

Connector

sharply.

 

 

Option B:

Gas Shut-off Valve

Medium or Heavy

Gauge Pipe

 

Gas Connector

 

Drip Leg

Union

Cap

Connection

 

14

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Contents Combat Page Roberts-Gordon, LLC Page Table of Figures Page Heater Safety Manpower RequirementsInstaller Responsibility Wall TagCorrosive Chemicals National Standards and Applicable CodesMinimum Required Installation Clearances Separated Combustion InstallationCritical Considerations 3.1 Basic Information Clearances to CombustiblesInstallation Clearances and Clearances to Combustibles National Standards and Applicable Codes Major Components 5.1 General SuspensionVent Installation Venting 6.1 VentingUnited States Requirements Canadian RequirementsSeparated Combustion Heaters Models Uhas 150 Unvented OperationHorizontal Venting Vertical VentingVent Material Vent and Roof DetailStandard Vented Heater Common Vertical Vent Termination Concentric Vent Box Horizontal Unvented Installation AIR SupplyBuilding Ventilation Outside Combustion Air SupplyGAS Piping ConnectionsWiring Positioning ThermostatsFan Control Low Voltage Thermostat with One HeaterUhas Series Internal Wiring Diagram TransformerUhas Series Ladder Wiring Diagram Electrical Connection to the Heater Operation and Maintenance LouversElectrical Checks Mechanical ChecksAutomatic Burner Control Sequence Pressure Switch Check Gas RateTurning Off the Heater Complete the Start-UpSimple Troubleshooting Simple Troubleshooting Burner FaultsHeater Operation To Turn the Heater OffUser Instructions Burner Maintenance 12.3 Fan/Motor Assembly MaintenanceHeat Exchanger Maintenance Gas Valve MaintenanceMaintenance Checklist Installation Code and Annual Inspections AllVicinity of the Heater Vehicles and OtherWhen installed Burner ObservationWindow Combustion Fan ScrollTroubleshooting 13.1 General Troubleshooting For Automatic Ignition Burner Systems Result in death or electrical shockTroubleshooting for Flame Supervision System StartConduct start-up procedure as shown on Page 19, Section Troubleshooting for Gas ValvesTroubleshooting for Combustion Fan Replacement Parts Burner ComponentsBurner Compartment Burner InjectorsIgnition Electrode and Flame Probe Description Part Number QtyCombustion Fan Vertical Installation Uhas Axial Fan/Guard/Motor Assembly Limit Switches Removal and ReplacementFan Removal and Replacement To Replace the Fan AssemblySpecifications Standard Models 150 400 Uhas Series Dimension DataGeneral Technical Data Table All Models Technical Data Table All ModelsWarranty is Void if ROBERTS-GORDON will PAY forROBERTS-GORDON will not PAY for Limitations on Authority RepresentativesPage Page Some objects can catch fire or explode when placed
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175, 225, 300, 250, 400 specifications

Roberts Gorden is a recognized leader in the field of heating solutions, particularly renowned for the development of its innovative radiant heating systems. The lineup of models including the Roberts Gorden 250, 300, 400, 150, and 225 features a blend of advanced technology, exceptional efficiency, and versatile applications that cater to various industrial and commercial needs.

At the core of Roberts Gorden products is their radiant heating technology. Unlike conventional heating systems that warm the air, radiant heaters emit infrared radiation, which directly heats objects and people within a space. This method not only provides a comfortable environment but also reduces energy consumption and minimizes the loss of heat, making it an environmentally friendly choice.

The Roberts Gorden 250 model is specifically designed for smaller spaces, offering compact efficiency without sacrificing power. It features an adjustable output, allowing for tailored heating based on specific requirements. The advanced burner technology ensures optimum combustion efficiency, translating to cost savings on fuel consumption.

Moving on to the Roberts Gorden 300, this unit is well-suited for medium-sized facilities. With enhanced capabilities, the 300 model offers improved heating distribution, making it ideal for warehouses and production floors. The ease of installation and maintenance further enhances its appeal, allowing businesses to focus on their operations rather than on complicated heating systems.

The Roberts Gorden 400 is a powerhouse in the lineup, engineered for larger spaces that demand high-performance heating. Its robust construction and powerful output provide effective warmth even in challenging environments. The unit is equipped with sophisticated controls that promote energy efficiency while maintaining optimum comfort levels.

In the mid-range spectrum, the Roberts Gorden 150 and 225 models cater to businesses needing versatile heating solutions. Both models are designed with user-friendly interfaces and include safety features that comply with industry standards. Their lightweight design allows for easy installation and mobility, making them suitable for temporary or permanent heating applications.

Overall, Roberts Gorden's commitment to innovation and efficiency is evident across its product range. With a focus on sustainability and advanced heating technologies, the Roberts Gorden 250, 300, 400, 150, and 225 models provide reliable heating solutions that meet the diverse preferences of industrial and commercial users. These products are not just about warmth; they are about creating a comfortable and productive environment while minimizing energy costs and environmental impact.
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