Roberts Gorden CTCU 15 Servicing 12.1 Servicing Instructions, Burner Maintenance, Flue Fan

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COMBAT® CTCU UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

SECTION 12: SERVICING 12.1 Servicing Instructions

After commissioning, the heater will require maintenance to be carried out annually. If the heater is used in a dirty or dusty area, more frequent maintenance may be necessary.

Installation Code and Annual Inspections: All installations and service of ROBERTS GORDON® products must be performed by a contractor qualified in the installation and service of gas-fired heating equipment and conform to all requirements set forth in the ROBERTS GORDON® manuals and all applicable governmental authorities pertaining to the installation, service and operation of the equipment.

To help facilitate optimum performance and safety, Roberts-Gordon recommends that a qualified contractor annually inspect your ROBERTS GORDON® products and perform service where necessary, using only ROBERTS GORDON® replacement parts.

WARNING

Cut Hazard

Turn off gas and electrical supply before maintenance.

Fan can start automatically at any time.

Failure to follow these instructions can result in severe injury or product damage.

NOTE 1: After any maintenance or repair work, always test fire the heater in accordance with the commissioning instructions on Page 15, Section 10 through Page 17, Section 10.3.1 to ensure all safety systems are in working order before leaving the heater to operate. Minor faults may be traced by using the troubleshooting charts on Page 22, Section 14 through Page 25, Section 14.5.

NOTE 2: Check all gas pipes and pipe joints to ensure there are no cracks or gas leaks. Any cracks in the pipes or pipe joints must be repaired.

NOTE 3: Inspect all suspended components and hardware. Insure that they are in good condition, properly tightened, and corrosion free.

12.2 Burner Maintenance

1.Open the door and remove the burner compart- ment cover. See Page 27, Section 15.2.

2.Clean any deposits from the main burner which may have formed in the injectors or venturi of the burner. See Page 27, Section 15.2.

3.Remove the ignition electrode and flame probe. Check condition of ignition electrode and flame probe. Clean off any deposits which may have been formed, check condition of ceramic insulators. Replace as necessary.

12.3 Fan/Motor Assembly Maintenance

The main fan bearings are permanently sealed and do not need lubrication. Before cleaning, turn off gas and electrical supply. Remove the fan and use a small brush or duster to clean the fan blades from each side. Replace fan when done.

12.4 Heat Exchanger Maintenance

The heat exchanger will remain clean unless a problem has developed with combustion. Inspect the heat exchanger. Look for signs of overheating at the front tubes which may indicate burner over firing or persistently low air flows.

12.5 Gas Control Valve Maintenance

No regular maintenance is required on this device. To change gas control valves, See Page 26, Step 15.1 and Page 30, Section 15.5.

Do not repair or disassemble on site. Replace faulty gas valves with genuine ROBERTS GORDON® replacement parts.

12.6 Flue Fan

The flue fan should not require maintenance. However, if the air pressure switch is causing burner lockout, then remove the flue fan from the vent box by unscrewing the three screws at the mounting plate. Remove the four screws attaching the mounting plate to the fan inlet (See Page 29, Section 15.4). Ensure that the fan is free to run and that the fan wheel is clean.

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Contents Mbat Page Roberts-Gordon, LLC Page Table of Figures Page Product Approval Clearances to Combustibles Heater SafetyInstaller Responsibility Corrosive ChemicalsFlue Minimum Required Installation ClearancesCritical Considerations 3.1 Basic Information VentilationInstallation Clearances and Clearances to Combustibles Specifications 4.1 Ctcua All Models Dimension Data Ctcua All ModelsGeneral Technical Data Table All Models CTCU-7 CTCU-11 CTCU-15 CTCU-22Heater Installation 5.1 General Shelf Mounting and SuspensionShelf Mounting and Hanging Suspension Changing Flue and Air Intake Orientation Flue InstallationFlue Installation Type B22 ApplianceVertical and Horizontal Flue Termination Type B22 Appliance Heaters Installed Within the Heated Space Room Sealed InstallationOpen Flued Installation AIR SupplyGAS Piping ConnectionsBurner Controls Thermostat Wiring and Electrical InformationRemote Controls Remote Fan ControlsSite Wiring Ctcua Wiring Diagram Models 7Mechanical Checks CommissioningLouvres Begin Commissioning Before Operating the HeaterAutomatic Burner Control Box Sequence Check Gas Rate Combustion TestingPressure Switch Turning Off the HeaterCommon User Controls 11.3.1 Fan Thermostat Burner Lockout Reset ButtonHeater Operation Limit ThermostatTo Turn the Heater Off Simple Fault FindingSimple Fault Finding Burner Faults Heat Exchanger Maintenance Burner Maintenance12.3 Fan/Motor Assembly Maintenance Gas Control Valve MaintenanceGas Valves Conversion Between Gases 13.1 GeneralBurner Conversion Conduct Commissioning procedure as shown on Page 15, Section Troubleshooting For Automatic Ignition Burner Systems Turn on controlsTroubleshooting for Flame Supervision System StartTroubleshooting for Solenoid Valves Troubleshooting for Main FanGas Valve Removal and Replacement PartsBurner Components Burner Compartment Burner InjectorsIgnition Electrode and Flame Probe Flue Fan Vertical Installation 041 Fan and Limit Thermostats 15.8.1 Removal and Replacement Ctcua Axial Fan/Guard/Motor AssemblyFan Removal and Replacement To Replace the Fan AssemblyPage Page Some objects can catch fire or explode when placed
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CTCU 7, CTCU 22, CTCU 11, CTCU 15, CTCU specifications

Roberts Gorden offers a diverse range of high-performance make-up air units known as the CTCU series, which includes models CTCU 22, CTCU 15, CTCU 7, CTCU 27, and CTCU 11. Each model is designed to deliver efficient and reliable air management solutions for various industrial and commercial applications.

The CTCU 22 is renowned for its robust construction and powerful performance, providing exceptional air flow rates that can accommodate larger facilities. It features a high-efficiency heat exchanger and a multi-stage filtration system that ensures optimal indoor air quality while reducing energy consumption. This model is particularly beneficial for environments requiring high volumes of tempered air, making it ideal for manufacturing plants and warehouses.

CTCU 15, on the other hand, is slightly smaller yet offers remarkable versatility. With an integrated control system, it can easily adapt to changing operational demands, making it a preferred choice for businesses that experience variable occupancy levels. Its quiet operation minimizes workplace noise, and its energy-efficient design significantly cuts operational costs.

CTCU 7 is specifically engineered for smaller spaces without compromising performance. This unit features compact dimensions while still delivering adequate air flow for localized heating and ventilation needs. The advanced temperature control algorithms allow for precise adjustments, ensuring a comfortable environment even in tight areas.

CTCU 27 stands out with its advanced technology that includes integrated smart controls. This model offers real-time monitoring and data analytics to optimize performance and enhance energy efficiency. Its ability to connect with existing building management systems makes it an appealing choice for modern facilities aiming to improve sustainability initiatives.

The CTCU 11 is characterized by its user-friendly interface and maintenance accessibility. It is built with durable materials that extend its lifespan, ensuring long-term reliability. This unit is ideal for applications where regular maintenance is challenging, as its design allows for easy access to all critical components.

In summary, Roberts Gorden's CTCU series encompasses a range of units catered to various industrial needs. With features focusing on efficiency, flexibility, and user-friendliness, these models deliver high-quality air management solutions to improve indoor environments while reducing energy consumption.
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