Roberts Gorden 250 Begin Start-Up Before Operating the Heater, Automatic Burner Control Sequence

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UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

11.2 Begin Start-Up

11.2.1 Before Operating the Heater

To ensure that all the controls are in safe working order, operate the heater for the first time with the isolating gas valve turned off and power supply turned on.

1.Turn off the isolating gas valve.

2.Turn up the thermostat above room temperature. The automatic ignition sequence will now begin as described

on Page 28, Figure 13.

There will be no ignition of the burner and lockout will occur, which proves the controls are operating correctly.

Figure 13: Automatic Burner Control Sequence

Thermostat 24 V

Flue Blower

Pressure P

Switch C

Ignition Spark Start Gas Valve

Flame Signal

Axial Fan

Burner Sequence for Ignition Control

 

 

START

RUN

SHUT DOWN

30 Seconds Purge*

 

30 Seconds Post Purge

NO

 

 

NC

 

 

ts = 10 Seconds

 

 

30 Seconds Delay

 

90 Seconds Delay

*Purge time begins at pressure switch change over.

Required Incoming Signals

If at any stage the flame fails, the control will retry

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Signals Output By Control

for ignition. The control has four trials for ignition

 

before a one hour lockout.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Contents Combat Page Gamme standard Page Roberts-Gordon LLC Page Table of Figures Page Heater Safety Manpower RequirementsSafety Labels and Their Placement California PropositionUHAXS150 175 Label Placement UHAXS200 250 Label Placement UHAXS300 400 Label Placement Installer Responsibility Wall TagNational Standards and Applicable Codes Minimum Required Installation Clearances Critical Considerations 3.1 Basic InformationManufactured Units VentilationInstallation Clearances and Clearances to Combustibles Clearances To CombustiblesNational Standards and Applicable Codes High Altitude Heater Installation 6.1 General Suspension MethodsVent Installation VentingUnited States Requirements Canadian RequirementsStandard Vented Heaters Models Uhax 150 Horizontal VentingVertical Venting Length RequirementsMaximum Vent Lengths Table Vent MaterialReplacing an Existing Heater in a Venting System Model Standard Vented Heater Common Vertical Vent Termination Concentric Vent Box Vertical Unvented Installation AIR SupplyBuilding Ventilation Outside Combustion Air SupplyGAS Piping ConnectionsDo not bend flexible gas connector Wiring Low Voltage Thermostat with One HeaterPositioning Thermostats Fan ControlLow Voltage Thermostat with Multiple Heaters Models UHAXS150 Low Voltage Thermostat with Multiple Heaters Models UHAXS300 Uhaxs Series Internal Wiring Diagram TransformerUhaxs Series Ladder Wiring Diagram FlameElectrical Connection to the Heater Operation and Maintenance Electrical ChecksLouvers Mechanical ChecksBegin Start-Up Before Operating the Heater Automatic Burner Control SequencePressure Switch Check Gas RateTurning Off the Heater External Controls Complete the Start-UpInstruction to the User User Instructions Servicing Maintenance Checklist Venting and Air Intake PipeAnnual Fall Start-Up Vicinity of the HeaterWhen installed Wall Tag Heat ExchangerGas Line and Shut-off Valves Burner ObservationTroubleshooting General Troubleshooting For Automatic Ignition Burner Systems Conduct start-up procedure as shown on Page 27, SectionTroubleshooting for Flame Supervision System StartTroubleshooting for Gas Valves Troubleshooting for Flue BlowerReplacement Parts Burner ComponentsBurner Compartment Burner InjectorsIgnition Electrode and Flame Probe Louvers and Louver Spring Horizontal Louvers LouversUhaxs Axial Fan/Guard/Motor Assembly Ignition ControlTo Replace the Fan Assembly Specifications 16.1 Dimension Data General Technical Data Table Technical Data TableWarranty is Void if ROBERTS-GORDON LLC will PAY forROBERTS-GORDON LLC will not PAY for Limitations on Authority RepresentativesPage Owner Warranty Registration Card Mail or Fax toPage
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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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