Roberts Gorden 125, 75, 100 Duct Heater Installation 6.1 General, Minimum Inlet Duct Length

Page 17

SECTION 6: DUCT HEATER INSTALLATION

SECTION 6: DUCT HEATER INSTALLATION 6.1 General

To connect the inlet and outlet ducts to the heater, Duct-Mate or similar flanges may be slid over the duct connector flanges supplied on the unit and secured with screws. The connection to the duct then can be made using the Duct-Mate clips. The ducts must have removable access panels upstream and downstream of the heater. These panels must be of appropriate size and placement so that smoke or reflected light could be observed to indicate the presence of leaks in the heat exchanger. Covers for these openings should be sealed to prevent leakage.

Any transition into the inlet of the heater should be smooth, with a taper of no more than 15 degrees. If elbows are required, they should be of either broad radius or fitted with properly designed air turns.

Consult a professional to ensure air turns are properly designed.

The heater must be installed on the positive pressure side of the circulating air blower. Air flow through the heater must be as shown on Page 9, Figure 4 and may not be reversed. The air flow must be adjusted such that it is within the acceptable range shown on Page 9, Section 6.1.3. The

6.1.1 Minimum Inlet Duct Length

minimum inlet duct lengths shown on Page 9, Section 6.1.1 should be observed. Pressure drop through the heat exchanger at various air flows is given on Page 9, Section 6.1.2.

Figure 4: Air Flow Direction

OUTLET DUCT

AIR FLOW

INLET DUCT

Model

Duct Length

Duct Size (W X H)

UHD[X][S] 75

32" (81 cm)

16 3/4" x 15 7/8" (43 cm x 40 cm)

UHD[X][S] 100 &125

37" (94 cm)

21 3/4" x 15 7/8" (55 cm x 40 cm)

6.1.2 Temperature Rise and Pressure Drop Ranges

 

UHD[X][S] 75

 

 

UHD[X][S] 100

 

UHD[X][S] 125

 

Airflow

Temperature

 

Pressure Drop

Airflow

Temperature

Pressure Drop

Airflow

Temperature

Pressure Drop

(CFM)

Rise (°F)

 

(in wc)

(CFM)

Rise (°F)

(in wc)

(CFM)

Rise (°F)

(in wc)

850

68

 

0.06

950

78

0.05

1,020

92

0.06

1,200

48

 

0.10

1,500

50

0.18

1,650

57

0.14

1,625

36

 

0.16

2,500

31

0.28

2,340

41

0.27

1,965

30

 

0.22

3,000

26

0.39

3,480

28

0.56

2,450

24

 

0.31

3,300

24

0.46

4,240

23

0.80

2,650

22

 

0.36

3,660

22

0.55

4,750

20

0.98

6.1.3 Air Flow and Temperature Rise Ranges

Model

Rate

Air Flow

 

Temperature Rise

 

(Btu/h)

Minimum (CFM)

 

Maximum (CFM)

Minimum (°F)

Maximum (°F)

UHD[X][S] 75

75,000

850

 

2,650

22

68

UHD[X][S] 100

100,000

950

 

3,660

22

78

UHD[X][S] 125

125,000

1,020

 

4,750

20

92

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Contents Combat Page Combat Page Roberts-Gordon LLC Page Table of Figures Page Manpower Requirements Heater SafetySafety Labels and Their Placement California PropositionUhdxs 75 Label Placement Combat Wall Tag Installer ResponsibilityCorrosive Chemicals National Standards and Applicable CodesCritical Considerations Clearances to Combustibles National Standards and Applicable Codes High Altitude Temperature Rise and Pressure Drop Ranges Duct Heater Installation 6.1 GeneralAir Flow and Temperature Rise Ranges Minimum Inlet Duct LengthSuspension Methods Wall MountingShelf-Mounting Methods Venting Vent InstallationUnited States Requirements Canadian RequirementsHorizontal Venting Standard Vented Heaters Models Uhdx 75Vertical Venting Length RequirementsReplacing an Existing Heater in a Venting System Maximum Vent LengthsVent Material Model Standard Vented Heater Common Vertical Vent Termination Concentric Vent Box UHVK1 AIR Supply Unvented InstallationBuilding Ventilation Outside Combustion Air SupplyConnections GAS PipingFire Hazard Connect gas supply according to Figure Hold gas nipple securely with pip wrench When attaching flexible gass connectorProduct Damage Hazard Wiring L2 L1 Uhdxs Series Internal Wiring DiagramFlue Blower Transformer GAS Valve Flame Sensor Electrode Uhdxs Series Ladder Wiring DiagramElectrical Connection to the Heater Pre-Start-Up Checks Operation and MaintenanceElectrical Checks Begin Start-Up Before Operating the HeaterEND View Automatic Burner Control SequenceCheck Gas Rate Pressure SwitchTurning Off the Heater External ControlsHeater Operation User InstructionsSimple Troubleshooting Burner Faults Simple TroubleshootingLighting Instructions 12.3.1 To Turn On Heater To Turn Heater OffServicing Vicinity of the Heater Annual Fall Start-upVehicles and Other ObjectsCombustion Air Intake When installed DuctworkPipe Heat ExchangerTroubleshooting Start GeneralConduct start-up procedure as shown on Page 26, 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 Flue Blower Vertical Installation Ignition Control Limit Switches Removal and ReplacementTOP View Specifications 16.1 Dimension DataTechnical Data Table General Technical Data TablePage ROBERTS-GORDON LLC will not PAY for Warranty is Void ifRoberts-Gordon LLC Limitations on Authority RepresentativesPage Mail or Fax to Owner Warranty Registration CardPage
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125, 100, 75 specifications

Roberts Gordon is a recognized leader in the manufacturing of innovative heating solutions, with a diverse product line including the 100, 125, 75, 45, and 60 series of radiant tube heaters. Each model is designed to meet specific heating needs while emphasizing efficiency, durability, and performance.

The Robert Gordon 100 series is known for its high efficiency and ability to provide consistent warmth in large industrial spaces. It features advanced infrared technology, which heats objects and surfaces directly, resulting in quicker temperature increases and enhanced comfort. This model is equipped with modulating burners that allow for optimal gas usage and can be easily integrated into existing systems.

The 125 series builds upon the efficiency of the 100 model while offering increased heating capacity. Its robust design ensures it can handle the demands of larger applications, such as warehouses and manufacturing facilities. With enhanced control options, users can tailor the heating output to match specific operational requirements, reducing energy consumption.

The 75 series offers a compact solution for smaller commercial spaces, providing a reliable heating source without taking up excessive floor space. Its lightweight design facilitates easy installation, while the modular approach allows for scalability to meet changing heating demands. This series emphasizes sustainability, utilizing advanced combustion technologies that minimize emissions.

For smaller applications, the 45 series stands out with its efficient heating capabilities in confined spaces. This series features simple, yet effective controls, enabling straightforward operation. The robust construction ensures durability, making it well-suited for different commercial environments, including retail settings or small workshops.

Finally, the 60 series combines the best features of the range with energy conservation as a primary focus. Its innovative design incorporates smart technology to monitor energy usage and optimize performance. The heaters are equipped with the latest in safety features, providing peace of mind for users.

Overall, Roberts Gordon’s radiant tube heaters showcase a commitment to high-quality heating solutions that cater to a variety of industrial and commercial applications. With energy efficiency, superior durability, and advanced heating technologies as core characteristics, Roberts Gordon remains a trusted choice for businesses looking to enhance their heating performance.
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