Roberts Gorden CTCU 27, CTCU 15, CTCU 11, CTCU 22, CTCU 7 service manual GAS Piping, Connections

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COMBAT® CTCU UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

SECTION 8: GAS PIPING

WARNING

Fire Hazard

Connect gas supply according to Figure 8.

Gas can leak if not installed properly.

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

It is important that the gas supply pipe and the electrical connections do not support any of the heater’s weight.

8.1 Connections

Connect the heater to the gas supply ensuring that the final connections are as follows:

Gas supply pipe work is run in medium or heavy gauge tubing in compliance with local and national codes.

The gas supply pipe is adequately sized to carry the total volume of gas for the complete installation.

An isolating valve and union connection should be used and fitted into the supply adjacent to the heater.

For suspended heaters, use an approved metal flexible connection between the isolating valve and the heater. To reduce pressure loss, use one pipe size larger than the heater gas connection.

A gas meter is connected to the service pipe by the gas supply company. An existing meter should be checked, preferably by the company, to ensure that the meter is adequate for the rate of gas supply required.

Installation pipes must be fitted in accordance with local and national codes. Pipe work from the meter to the heater(s) must be of adequate size. Pipes of smaller size than the heater inlet gas connection should not be used.

IMPORTANT - The complete installation must be purged and tested for gas soundness in accordance with local and national codes.

Figure 8: Gas Connection with Stainless Steel Flex Connector

• Hold gas nipple securely

with pipe wrench when attaching the flex gas connector.

• Do not twist flexible

Option A:

Stainless Steel

gas connector.

Flex Gas

 

Connector

• Ensure all joints are

gas tight.Do not bend flexible gas connector sharply.

 

Option B:

Gas Isolating Valve

Medium or Heavy

Gauge Tubing

 

Gas Connector

 

Drip Leg

Union

Cap

Connection

 

12

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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 ThermostatSimple Fault Finding Simple Fault Finding Burner FaultsTo Turn the Heater Off Heat Exchanger Maintenance Burner Maintenance12.3 Fan/Motor Assembly 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 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.