Roberts Gorden UHD[X][S][R] 125, UHD[X][S][R] 75 service manual General Technical Data Table

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SECTION 15: SPECIFICATIONS

15.2 General Technical Data Table

 

 

UHD[X][S][R]

UHD[X][S][R]

 

UHD[X][S][R]

 

Model

75

100

 

125

 

 

 

 

 

 

Full Load Amps @ 115 V

A

1

2

 

2

 

 

 

 

 

 

Minimum Air Volume

CFM

850

950

 

1020

 

 

 

 

 

 

Temperature Rise @ Minimum Air Volume

°F (°C)

68 (20)

78 (26)

 

92 (33)

 

 

 

 

 

 

Heat Exchanger Pressure Drop @ Minimum Air Volume

in wc

0.06

0.05

 

0.06

 

 

 

 

 

 

Maximum Air Volume

CFM

2650

3660

 

4750

 

 

 

 

 

 

Temperature Rise @ Maximum Air Volume

°F (°C)

22 (-6)

22 (-6)

 

20 (-7)

 

 

 

 

 

 

Heat Exchanger Pressure Drop @ Maximum Air Volume

in wc

0.36

0.55

 

0.98

 

 

 

 

 

 

Flue Size/Air Intake**

in (cm)

 

4 (10)-All models

 

 

 

 

 

 

 

*Do not exceed the maximum length of flue stated or heater may not operate properly.

15.3 Technical Data Table

 

Model

UHD[X][S][R]

UHD[X][S][R]

UHD[X][S][R] 125

 

75

100

 

 

 

 

 

 

 

 

Total Input

(Btu/h) x (1000)

75

100

125

 

 

 

 

 

Total Output

(Btu/h) x (1000)

61.5

82

102.5

 

 

 

 

 

Efficiency

%

 

82-All models

 

 

 

 

 

 

Natural Gas (G20) Data - Inlet Pressure 5.0 in wc Min., 14 in wc Max.

 

 

 

 

 

 

 

Burner Pressure

in. wc

3.5

2.6

3.3

 

 

 

 

 

LPG / Propane (G31) Data - Inlet Pressure 12.0 in wc Min., 14 in wc Max.

 

 

 

 

 

 

 

Burner Pressure

in. wc

10.0

9.1

10.0

 

 

 

 

 

41

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Contents Combat Page Roberts-Gordon LLC Page Table of Figures Page Manpower Requirements Heater SafetyWall Tag Installer ResponsibilityCorrosive Chemicals National Standards and Applicable CodesClearances to Combustibles Minimum Required Installation ClearancesCritical Considerations 3.1 Basic Information Manufactured UnitsVent VentilationElectrical Supply Gas SupplyNational Standards and Applicable Codes High Altitude Minimum Inlet Duct Length Duct Heater Installation 5.1 GeneralTemperature Rise and Pressure Drop Ranges Air Flow and Temperature Rise RangesWall Mounting Shelf Mounting and SuspensionShelf-Mounting Methods United States Requirements Vent InstallationVenting Changing Vent and Air Intake OrientationHorizontal Venting Standard Vented Heaters Models Uhdxr 75Separated Combustion Heaters Models Uhdxsr 75 Unvented OperationReplacing an Existing Heater in a Venting System Maximum Vent LengthsVent Material Vent and Roof Detail Standard Vented Heater Common Vertical Vent Termination Concentric Vent Box UHVK1 Building Ventilation Separated Combustion InstallationUnvented Installation AIR SupplyConnections GAS PipingPositioning Thermostats WiringLow Voltage Thermostat with One Heater L2 L1 Internal Wiring DiagramFlue Blower Transformer GAS Valve Flame Sensor Electrode Ladder Wiring DiagramElectrical Connection to the Heater Electrical Checks Operation and MaintenanceBegin Start-Up Before Operating the Heater Pre-Start-Up ChecksEND View External Controls Pressure SwitchCheck Gas Rate Turning Off the HeaterLighting Instructions 11.4.1 To Turn On Heater User InstructionsUser Instructions Heater OperationTo Turn Heater Off Simple TroubleshootingSimple Troubleshooting Burner Faults Servicing Objects Maintenance ChecklistVicinity of the Heater Vehicles and OtherBurner Observation When installed DuctworkGas Line and Shut-off ValvesTroubleshooting 13.1 General Conduct start-up procedure as shown on Page 23, Section Troubleshooting For Automatic Ignition Burner SystemsTroubleshooting for Flame Supervision System Troubleshooting for Flue Blower Troubleshooting for Gas ValvesBurner Components Replacement PartsBurner Injectors Burner CompartmentIgnition Electrode and Flame Probe Top, remove the blower and mounting plate as above Flue Blower Vertical InstallationIgnition Control Limit Switches Removal and ReplacementTOP View Specifications 15.1 Dimension DataTechnical Data Table General Technical Data TablePage Limitations on Authority Representatives Warranty is Void ifRoberts Gordon will not PAY for Roberts-GordonPage Owner Warranty Registration Card Page Page Clearances to Combustibles