Roberts Gorden CTCU 27, CTCU 15 Heater Operation, Common User Controls 11.3.1 Fan Thermostat

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COMBAT® CTCU UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

SECTION 11: USER INSTRUCTIONS 11.1 User Instructions

The CTCU heaters are fully automatic and operate from the external controls fitted on site.

The only user controls at the heater are the:

Burner Lockout

 

Reset Button

See Page 18, Section 11.3.3

Limit Thermostat Reset See Page 18, Section 11.3.2

WARNING

Electrical Shock Hazard

Disconnect electrical power before servicing.

Failure to follow these instructions can result in death or electrical shock.

11.2 Heater Operation

When the heater has been switched on by the remote controls installed on site, the main burner will automatically turn on.

The burner control box will control the safe ignition of the flame.

All heaters require a constant gas and electricity supply which must not be interrupted during the normal operation of this heater.

Figure 11: Heater Operating Sequence

 

ON

CLOSE

THERMOSTAT

 

DOWN

CALL FOR

 

 

HEAT

ON

 

BURNER

 

 

RUN

ON

 

 

 

 

2-3 MINUTES

RUN ON

FAN

 

 

11.3Common User Controls 11.3.1 Fan Thermostat

The fan thermostat is located inside the access door at the top of the heater. See Page 28, Section 15.3. This control ensures the heater does not blow cold air in the normal heating cycle.

11.3.2 Limit Thermostat

The limit thermostat is located inside the access door of the heater. See Page 28, Section 15.3. This control protects the heat exchanger against overheating.

Press to reset

These are hand reset devices to give further protection against fan failure.

NOTE: To reset, the heat exchanger must be cool.

Description

Part Number

Limit Thermostat

90412100

WARNING

Explosion Hazard

If control locks out, do not make more than 3 attempts to restart the heater.

Dangerous gas mixtures can build up.

The fault must be traced and repaired by a registered installer or service engineer.

Failure to follow these instructions can result in death, injury or property damage.

11.3.3 Burner Lockout Reset Button

The red warning light on the back of the heater will illuminate when the control has gone to lockout. This may be caused by flame failure. Press the reset button on the back of the heater (See Page 5, Section 4.1) or the remote reset if installed on site.

11.4Lighting Instructions 11.4.1 To Turn On Heater

1. Ensure that the electrical and gas supplies to the heater are on. Check that the on site con- trols are “ON”.

NOTE: The thermostat setting must be above the ambient temperature for the heater to operate.

2.The automatic firing sequence will begin as described on Page 16, Figure 9. The heater will now operate automatically under the control of the on site controls. Following long shut down periods, the control may go to lockout. See Page 18, Section 11.3.3.

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Contents Mbat Page Roberts-Gordon, LLC Page Table of Figures Page Product Approval Heater Safety Installer ResponsibilityClearances to Combustibles Corrosive ChemicalsMinimum Required Installation Clearances Critical Considerations 3.1 Basic InformationFlue 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 Flue Installation Flue InstallationChanging Flue and Air Intake Orientation Type B22 ApplianceVertical and Horizontal Flue Termination Type B22 Appliance Room Sealed Installation Open Flued InstallationHeaters Installed Within the Heated Space AIR SupplyGAS Piping ConnectionsWiring and Electrical Information Remote ControlsBurner Controls Thermostat Remote Fan ControlsSite Wiring Ctcua Wiring Diagram Models 7Commissioning LouvresMechanical Checks Begin Commissioning Before Operating the HeaterAutomatic Burner Control Box Sequence Combustion Testing Pressure SwitchCheck Gas Rate Turning Off the HeaterBurner Lockout Reset Button Heater OperationCommon User Controls 11.3.1 Fan Thermostat Limit ThermostatSimple Fault Finding Simple Fault Finding Burner FaultsTo Turn the Heater Off Burner Maintenance 12.3 Fan/Motor Assembly MaintenanceHeat Exchanger Maintenance Gas Control Valve MaintenanceConversion Between Gases 13.1 General Burner ConversionGas Valves 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 FanRemoval and Replacement Parts Burner ComponentsGas Valve Burner Compartment Burner InjectorsIgnition Electrode and Flame Probe Flue Fan Vertical Installation 041 Ctcua Axial Fan/Guard/Motor Assembly Fan Removal and ReplacementFan and Limit Thermostats 15.8.1 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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