Roberts Gorden 200, 350, 150, 400, 250, 300, 225, 175 Uhaxs Series Internal Wiring Diagram, Transformer

Page 32

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

10.5 UHA[X][S] Series Internal Wiring Diagram

AXIAL FAN

AXIAL FAN (UHA 300,

350, 400) ONLY)

 

Black

 

White

 

Green

 

Black

FLUE

 

BLOWER

 

 

White

 

Green

PRESSURE

Blue

 

SWITCH

Blue

Green

 

 

L2

L1

 

 

White

 

 

 

White

 

 

 

 

 

 

 

 

 

 

 

White

 

Black

Black

 

 

 

 

 

 

 

 

Green

 

Green

 

 

 

 

 

GAS VALVE

 

 

 

 

3

1

Black

TRANSFORMER

 

 

 

 

 

 

 

 

 

4

5

 

 

 

Blue

 

Yellow

 

 

 

 

 

 

 

Yellow

 

 

 

 

 

 

Brown

VAC24 HOT

GROUND

 

 

 

 

 

3

2

1

 

 

 

 

 

6

5

4

 

 

 

LIMIT

Orange

 

 

SWITCH

 

 

Orange

(UHA

Orange

 

 

 

300,350,

 

Flame

 

 

400 ONLY)

 

 

MANUAL RESET LIMIT SWITCH

LIMIT

(UHA 30 - 125 ONLY)

SWITCH

 

SENSE

 

Black

 

Orange

IGNITION MODULE

R

G

W

C

 

 

 

R

= 24 VAC TO THERMOSTAT (RED)

 

 

 

G

= MANUAL FAN INPUT FROM THERMOSTAT (GREEN)

 

 

 

W

= HEAT DEMAND INPUT FROM THERMOSTAT (WHITE)

 

 

 

 

 

 

C

= COMMON SIDE OF TRANSFORMER

 

 

 

 

 

 

 

 

Black

 

THERMOSTAT INPUT:

 

 

 

FIELD SUPPLIED

ELECTRODE Black

Black

Black

ACC

L1

CMB

Blower

Black

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 (221° F) and 600 volts. For supply connections use No. 14 AWG or larger wires.

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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 National Standards and Applicable Codes Installer ResponsibilityWall Tag 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 RequirementsReplacing an Existing Heater in a Venting System Maximum Vent Lengths TableVent Material 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 SequenceTurning Off the Heater Pressure SwitchCheck Gas Rate Instruction to the User External ControlsComplete the Start-Up 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.