Roberts Gorden CGTH-50, CGTH-30, CGTH-40 service manual Burner does not Light, LP Gas, Natural Gas

Page 43

 

 

SECTION 9: TROUBLESHOOTING

Pressure switch does not

Check flue/air supply duct for obstructions; remove any obstructions.

operate.

Check for loose/leaky air hoses to the pressure switch; repair/

 

replace/tighten hoses as required. Check for 24V across the secondary

 

terminals 4 and 5 (red and yellow wires) of the transformer.

 

IF NO: Check for 120V across the primary terminals 1 and 3 (black and

 

white wires) of the transformer. If 120V is present, replace

 

transformer. If 120V is not present, check wiring between power

 

cord, blower motor and transformer.

 

IF YES:Connect a jumper wire across pressure switch terminals; if jumper

 

wire allows blower to operate, replace pressure switch

 

(See Page 45, Section 12.1.1 for part number that applies to your

 

unit rating). Do not resume normal heater operation until

 

replacement pressure switch has been installed.

 

 

Igniter spark gap incorrect.

Reset spark gap to 1/8" (3.175 mm).

 

 

 

BURNER DOES NOT LIGHT

 

 

Possible Cause

Try this....

 

 

 

 

Air in the gas line.

Purge gas lines.

 

 

 

Improper gas inlet pressure.

Check gas inlet pressure at the supply line. Gas inlet pressure should be

 

as follows:

 

 

Natural Gas: 5.0" w.c. (12.4 mbar) minimum;

 

 

14.0" w.c. (34.8 mbar) maximum

 

LP Gas:

11.0" w.c. (27.4 mbar) minimum;

 

 

14.0" w.c. (34.8 mbar) maximum

 

If gas inlet pressure does not meet inlet pressure requirements, contact

 

the gas company.

 

 

 

Gas valve does not open.

Check for 24V across valve terminals.

IF NO: Check wiring between the ignition module and the valve. Repair/ replace wires as required. If wiring is OK, replace ignition module.

IF YES: Replace gas valve.

Low gas outlet pressure.

Check gas manifold pressure. Measure manifold pressure at the pressure

 

tap on the gas valve. See Page 35, Figure 33 and Page 38, Figure 34.

 

Natural Gas:

3.5" w.c. (8.7 mbar)

 

LP Gas:

10.5" w.c. (26.1 mbar)

If manifold pressure does not meet requirements, adjust valve outlet pressure with the adjustment screw on the valve.

NOTE: Proper inlet gas pressure must be verified before performing outlet pressure testing.

37

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Contents Gas-Fired, Low-Intensity Page 2005 Page Table of Figures Page Questions, Comments or Suggestions Before YOU Begin 1.1 Read This ManualRoberts-Gordon, LLC Safety Unpacking the Heater 2.3.1 Manpower RequirementsAbout the Heater Carton Contents of Heaters with Galvanized Venting Manual Gas Shut-off Valve Carton Contents of Heaters with Cox Geelen VentingHeater Assembly Available as an accessory under kit part numbersAvailable Accessories for Galvanized Vent Wall Venting Kit P/N 08032200 includes CGTH-Series by Components Identification Components IdentificationVenting Specifications Heater SpecificationsWhere Cant the Heater Be Installed? Where Can the Heater Be Installed?Planning 3.1 General Gas Service Requirements 3.2.1 Gas TypeMeter and Service Electrical Service RequirementsPublic Garages Venting Requirements 3.4.1 System RequirementsVenting Codes Balanced Flue ConstructionHazardous Locations Installation Materials InstallationSafety Equipment Installation ToolsGeneral Venting Guidelines Required Safe Distances from Combustibles Inches Metric cm ModelHang the Heater Remove Shipping Screw from Control Housing DoorNon-residential applications Heater Orientation Typical InstallationDimension Model Minimum Maximum Horizontal Installation45 Tilted Installation 13 45 Tilted InstallationSilicone Cap Installation Grille Installation for Select Models OnlyUnited States Requirements Venting InstallationInstall Galvanized Collar General Venting RequirementsGalvanized Horizontal Venting Galvanized Horizontal Venting with an Elbow Bird Screen InstallationHorizontal Installation Top View Elbow Assembly Assembly Overview Vent Assembly OverviewCox Geelen Horizontal Venting Horizontal Installation Side View Cox Geelen VentingPart Number Description Flue Collar and AdapterCox Geelen Vertical Venting Vertical Venting ConfigurationsVent Clamp System Requirements Electrical Service InstallationHeater Rating 120V, 60 Hz, Single Phase, 1A Thermostat PlacementThermostat Installation Rear View GAS Service Installation 7.1 Install Gas Supply Lines Sequence of Operation TestingOperation 8.1 Operating Instructions To Turn Off Gas To HeaterCover Cap Regulator Screw Outlet Pressure Tap Possible Cause Try this Blower does not Come onIgniter does not Spark LP Gas Burner does not LightNatural Gas Manometer Reading Burner Cycles on and OFF TOO Quickly Burner Makes Vibrating Noises While Running Housing door. See Page 17, SectionMaintenance 10.1 Pre-Season Maintenance Connection Diagram Wiring Diagrams 11.1 Connection DiagramLadder Diagram Ladder Diagram Illustrated Parts List for Burner Illustrated Parts List Replacement PartsReplacement Parts List for Burner Part Number Description CGTH-30 CGTH-40 CGTH-50 ROBERTS-GORDON will not PAY for Warranty is Void ifLimitations on Authority Representatives Page Owner Warranty Registration Card Page
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CGTH-40, CGTH-50, CGTH-30 specifications

Roberts Gordon is a renowned manufacturer known for its innovative heating solutions, particularly in the realm of infrared heaters. Among their product lineup, the CGTH series, which includes the CGTH-50, CGTH-40, and CGTH-30 models, exemplifies high-performance technology tailored specifically for industrial and commercial applications.

The CGTH series is designed for versatility and efficiency, offering advanced features that enhance the heating experience in various environments. One of the standout features of these heaters is their infrared technology, which provides targeted warmth, making them ideal for large, open spaces such as warehouses, factories, and sporting facilities. Infrared heaters work by directly heating objects and people in their path rather than the air, ensuring quicker warmth and greater energy efficiency.

Each model offers different heating capacities, with the CGTH-50 boasting a maximum output of 50,000 BTUs, the CGTH-40 providing up to 40,000 BTUs, and the CGTH-30 generating 30,000 BTUs. This variety allows users to choose a model that best fits their heating needs based on the size and requirements of their space.

The units are designed for easy installation, featuring a modular design that allows for both indoor and outdoor applications. Moreover, the heaters can be integrated with various control systems, including programmable thermostats and remote management, enhancing user convenience and optimizing energy usage.

A critical aspect of the CGTH series is its emphasis on durability and safety. Each model is crafted using high-quality materials that can withstand harsh conditions typically found in industrial settings. Additionally, they incorporate safety features such as over-temperature protection and robust mounting brackets, ensuring peace of mind during operation.

Another important characteristic of the CGTH series is their efficiency. By minimizing energy waste and targeting heat output precisely, these heaters can significantly lower energy costs, making them not only environmentally friendly but also economically advantageous for businesses.

In summary, the Roberts Gordon CGTH-50, CGTH-40, and CGTH-30 infrared heaters stand out for their innovative technology, energy efficiency, and reliability. Whether for large commercial spaces or industrial environments, these heating solutions are designed to provide the comfort and performance required for any operation. With their robust features and customizable options, they remain a top choice for effective heating solutions in diverse settings.
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