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

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COMBAT® UHA UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

9.3 UHA(S) Series Internal Wiring Diagram

AXIAL FAN

AXIAL FAN (UH 300, 350, 400 ONLY)

 

BLACK

WHITE

GREEN

BLACK

BLOWER

WHITE

GREEN

GREEN

L2

L1

 

 

WHITE

WHITE

 

 

 

 

 

 

WHITE

 

BLACK

GREEN

BLACK

 

 

 

 

 

GREEN

 

 

 

GAS VALVE

 

3

1

 

 

BLACK

TRANSFORMER

 

 

 

 

 

 

45

PRESSURE SWITCH

BLUE

 

BLUE

BLUE YELLOW

VAC24 HOT

GROUND

3

2

1

 

 

6

5

4

YELLOW

BROWN

LIMIT SWITCH

ORANGE

 

(UH 300, 350,

 

 

400 ONLY)

 

 

 

ORANGE

 

MANUAL RESET LIMIT SWITCH

LIMIT SWITCH

(UH 30 - 125 ONLY)

 

 

SENSE

 

BLACK

ELECTRODEBLACK

BLACK

BLACK

 

 

R

R = 24 VAC TO THERMOSTAT (RED)

 

 

 

ORANGE

 

G

G = MANUAL FAN INPUT FROM THERMOSTAT (GREEN)

ORANGE

W

 

W= HEAT DEMAND INPUT FROM THERMOSTAT (WHITE)

FLAME

 

C

C = COMMON SIDE OF TRANSFORMER

IGNITION MODULE

 

 

 

 

 

 

THERMOSTAT INPUT: FIELD SUPPLIED

 

 

 

BLACK

 

ACC

CMB BLOWER

BLACK

 

 

 

 

L1

 

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 and 600 volts. For supply connections use No. 14 AWG or larger wires.

16

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Contents Combat Page Roberts-Gordon, LLC Page Table of Figures Page Heater Safety Manpower RequirementsCorrosive Chemicals Installer ResponsibilityWall Tag National Standards and Applicable CodesCritical Considerations 3.1 Basic Information Minimum Required Installation ClearancesSeparated Combustion Installation Clearances to CombustiblesInstallation Clearances and Clearances to Combustibles National Standards and Applicable Codes Major Components 5.1 General SuspensionUnited States Requirements Vent InstallationVenting 6.1 Venting Canadian RequirementsHorizontal Venting Separated Combustion Heaters Models Uhas 150Unvented Operation Vertical VentingVent Material Vent and Roof DetailStandard Vented Heater Common Vertical Vent Termination Concentric Vent Box Horizontal Building Ventilation Unvented InstallationAIR Supply Outside Combustion Air SupplyGAS Piping ConnectionsFan Control WiringPositioning Thermostats Low Voltage Thermostat with One HeaterUhas Series Internal Wiring Diagram TransformerUhas Series Ladder Wiring Diagram Electrical Connection to the Heater Electrical Checks Operation and MaintenanceLouvers Mechanical ChecksAutomatic Burner Control Sequence Turning Off the Heater Pressure SwitchCheck Gas Rate Complete the Start-UpHeater Operation Simple TroubleshootingSimple Troubleshooting Burner Faults To Turn the Heater OffUser Instructions Heat Exchanger Maintenance Burner Maintenance12.3 Fan/Motor Assembly Maintenance Gas Valve MaintenanceVicinity of the Heater Maintenance ChecklistInstallation Code and Annual Inspections All Vehicles and OtherWindow When installedBurner Observation Combustion Fan ScrollTroubleshooting 13.1 General Troubleshooting For Automatic Ignition Burner Systems Result in death or electrical shockTroubleshooting for Flame Supervision System StartTroubleshooting for Combustion Fan Troubleshooting for Gas ValvesConduct start-up procedure as shown on Page 19, Section Replacement Parts Burner ComponentsBurner Compartment Burner InjectorsIgnition Electrode and Flame Probe Description Part Number QtyCombustion Fan Vertical Installation Uhas Fan Removal and Replacement Axial Fan/Guard/Motor AssemblyLimit Switches 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 ModelsROBERTS-GORDON will not PAY for Warranty is Void ifROBERTS-GORDON will PAY for Limitations on Authority RepresentativesPage Page Some objects can catch fire or explode when placed
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Manual 52 pages 19.42 Kb Manual 62 pages 5.65 Kb

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.