Roberts Gorden CTU 22 TO 115 service manual Wiring and Electrical Information

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SECTION 10: WIRING AND ELECTRICAL INFORMATION

SECTION 10: WIRING AND ELECTRICAL INFORMATION

10.1 Electrical Supply

All heaters need a constant 230 V 50 Hz single phase supply connected to terminals L, N & Earth. Polarity "L & N" must be correct. The voltage between neutral and earth should be 0 and never exceed 15 volts.

All heaters and controls must be correctly earthed. All external wiring must comply with the relevant local codes. Wire specification H05VV-F.

External controls must have the same constant 230 V 50 Hz supply.

An isolator with a contact separation of at least

3 mm on all poles must be installed adjacent to, but not attached to, the heater to disconnect all supplies to the heater and any remote control.

The final connection to the heater should be made by flexible cable or conduit to the main terminal block on the inside of the heater using 1 mm2 cable on all models.

Models

Fuse Size

 

 

CTUA (All Models)

5 A

 

 

CTUB & CTUC (Models 22-50)

10 A

 

 

CTUB & CTUC (Models 75 - 115)

20 A

 

 

CTUD heaters must have the external fan, or its control connected to Terminal 1 so that the fan run- on function at close down operates correctly.

10.2.1 Burner Controls (Thermostat)

Controls to operate the burner must be voltage free contacts connected between terminals 2 & 3 of the main terminal block.

10.2.2Positioning Room Thermostats or ROBERTS GORDON® Control

A room thermostat or ROBERTS GORDON® control should be mounted on a wall or column at a height of approximately 1.5 metres from the floor to measure the ambient temperature. It should be clear of both cold draughts and the direct path of warm air from the heater.

10.2.3 Remote Frost Thermostat

When required, connect to terminals 2 and 3 in the main terminal block.

Locate within the heated space adjacent to the most vulnerable equipment that requires protection.

See Page 16, Section 10.3 through Page 17, Section 10.4.

10.2.4 Remote Fan Controls

The fan will operate automatically providing there is a constant 230 V supply to the main terminals.

A switch or control wired between terminals L & 1 in the terminal block will allow external control of the fan(s).

The fan may be controlled to operate continuously from an external control, with the burner cycling on and off, providing that the fan run-on at close down is not impaired.

WARNING

Electrical Shock Hazard Disconnect electrical power before servicing.

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

10.2 Remote Controls

The heater is designed to be operated by controls installed remote from the heater. See Page 16, Section 10.3. through Page 17, Section 10.4.

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Contents Supplier after leaving the building Immediately call your local gasFollow the gas supplier’s Instructions Supplier, call the Fire DepartmentPage Roberts-Gordon, LLC Page Table of Figures Page Product Approval Installer Responsibility Heater SafetyClearances to Combustibles Corrosive ChemicalsCritical Considerations 3.1 Basic Information Minimum Required Installation ClearancesVentilation Gas SupplyInstallation Clearances and Clearances to Combustibles Dimension Data Ctua All Models Specifications 4.1 CtuaTop View End View Rear ViewCTUB, Ctuc and Ctud Dimension Data CTUB, Ctuc and CtudGeneral Technical Data Table Gas rates corrected to standard conditions 1013.25 mbar 15 C Handling Heater Installation 5.1 GeneralFlue Installation 6.1 Flue Installation Type B22 ApplianceAir Intake Terminal Cover Vertical and Horizontal Flue Termination Type B22 Appliance AIR Supply Optional Heater Configurations Distribution Duct Work for CTUB, Ctuc and Ctud HeatersCtud Heaters Connections GAS PipingOption a Option BWiring and Electrical Information 50 Hz Ctua Wiring Diagram ModelsSite Wiring CTUB/C Wiring Diagram Models Site Wiring230 V 1 Ø 50 Hz Ignition ModuleRUN For external fan wiring Ctud Wiring Diagram ModelsSite Wiring and Electrical Information Louvres CommissioningElectrical Checks Mechanical ChecksEnd View Automatic Burner Control Box SequenceCombustion Testing Check Gas RateTurning Off the Heater External Controls Complete the CommissioningInstruction to the User Heater Operation Burner Lockout Reset ButtonCommon User Controls Thermostat Limit Thermodisc Lighting Instructions To Turn On HeaterSimple Fault Finding Simple Fault Finding Burner FaultsTo Turn the Heater Off 13.3 Fan/Motor Assembly Maintenance Burner MaintenanceHeat Exchanger Maintenance Gas Control Valve MaintenanceConversion Between Gases 14.1 General Burner ConversionGas Valves Start Conduct Commissioning procedure as shown on Page 24, SectionTroubleshooting For Automatic Ignition Burner Systems For your safety and optimum heater performanceConduct Commissioning procedure as shown Troubleshooting for Solenoid Valves Troubleshooting for Flame Supervision SystemRemoval and Replacement Parts Burner Injectors Burner CompartmentIgnition Electrode and Flame Probe Remove screws securing outlet flange to the flue adapter RG P/N Pressure SwitchFan Removal and Replacement Ctua Axial Fan/Guard/Motor AssemblyTo Replace the Fan Assembly Ctub & Ctuc Centrifugal Fan/Guard/Motor AssemblyFan Data Centrifugal Fan OrientationPage Page Page Some objects can catch fire or explode when placed

CTU 22 TO 115 specifications

The Roberts Gordon CTU 22 TO 115 is a renowned unit heater designed to deliver efficient heating solutions in commercial and industrial settings. Known for its advanced features and robust design, this unit heater is ideal for applications where warmth and comfort are essential, such as warehouses, manufacturing facilities, and large retail spaces.

One of the main features of the CTU 22 TO 115 is its powerful heating capacity. With a range of output capabilities, it can effectively heat large areas, ensuring that employees and equipment remain comfortable during cold weather. The heater's output is adjustable, allowing for tailored heating solutions based on specific operational needs.

This model integrates several innovative technologies to enhance efficiency and performance. The use of advanced combustion technology ensures optimal fuel efficiency, which translates to lower energy costs and reduced environmental impact. The heater is available in both gas and oil configurations, providing versatility to accommodate different fuel sources depending on availability and preference.

In addition to its energy efficiency, the Roberts Gordon CTU features a compact design, making it suitable for installations in tight spaces. Its lightweight construction allows for easy installation and relocation, ensuring that businesses can quickly adapt to changing layout requirements. The unit is equipped with high-quality materials and a durable finish, contributing to its longevity and low maintenance needs.

Safety is a paramount concern in any heating system, and the CTU 22 TO 115 doesn't disappoint. It comes with various safety features, including over-temperature protection, ensuring that it operates securely under all conditions. With automatic shutoff capabilities, the heater provides peace of mind to operators, allowing for unattended operation in more remote settings.

Moreover, the CTU’s quiet operation is a significant advantage, as it minimizes disruption in the workplace, ensuring a comfortable environment for personnel. Its design also facilitates easy access to components for maintenance, thus ensuring that the unit remains operational with minimal downtime.

Overall, the Roberts Gordon CTU 22 TO 115 combines performance, efficiency, and safety features to create a reliable heating solution for diverse industrial applications. Its adaptability to various fuel types and efficient design makes it a popular choice among facility managers looking for dependable heating solutions.
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