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© Copyright 2006 Roberts-Gordon, LLC
Compact Tubular Unit Heaters
Installation, Commissioning,
Operation & Service Manual
Please take the time to read and understand
these instructions prior to any installation.
Installer must give a copy of this manual to the owner.
Keep this manual in a safe place in order to provide
your serviceman with necessary information.
Roberts-Gordon Europe Limited
Oxford Street
Bilston, West Midlands WV14 7EG UK
Telephone: +44(0) 1902 494425
Fax: +44(0) 1902 403200
Service Telephone: +44(0) 1902 498733
Service Fax: +44(0) 1902 401464
E-mail: uksales@rg-inc.com
E-mail: export@rg-inc.com
www.rg-inc.com
Models CTCU 7
CTCU 11
CTCU 15
CTCU 22
CTCU 27
CTCU 32
Installer
Owner
P/N 111100UK Rev B 10/06
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Table of Contents
Troubleshooting
Related Manuals for Roberts Gorden Combat CTCU 11
Summary of Contents for Roberts Gorden Combat CTCU 11
- Page 1 Telephone: +44(0) 1902 494425 Fax: +44(0) 1902 403200 Service Telephone: +44(0) 1902 498733 Service Fax: +44(0) 1902 401464 E-mail: uksales@rg-inc.com E-mail: export@rg-inc.com www.rg-inc.com Models CTCU 7 CTCU 11 CTCU 15 CTCU 22 CTCU 27 CTCU 32 Installer Owner P/N 111100UK Rev B 10/06...
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Page 3: Table Of Contents
14.2 Troubleshooting For Automatic Ignition Burner Systems ...23 14.3 Troubleshooting for Flame Supervision System ...24 14.4 Troubleshooting for Solenoid Valves ...25 14.5 Troubleshooting for Main Fan ...25 SECTION 15: Removal and Replacement Parts...26 15.1 Gas Valve ...26 15.2 Burner Compartment ...27 15.3 Ignition Electrode and Flame Probe ...28... - Page 5 TABLE OF FIGURES Figure 1: Installation Clearances and Clearances to Combustibles... 4 Figure 2: Suspension Methods ... 7 Figure 3: Shelf Mounting and Hanging Suspension... 8 Figure 4: Vertical Louvres (Optional) ... 8 Figure 5: Flue and Roof Detail ... 9 Figure 6: Vertical and Horizontal Flue Termination - Type B Appliance ...
- Page 7 COMBAT ® Compact Tubular Unit Heaters are high efficiency heaters and are listed on the Enhanced Capital Allowance Scheme ’Energy Technology Product List’ . The ETL symbol is a UK registered certification mark of The Carbon Trust. Product Approval...
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Page 8: Section 1: Heater Safety
® COMBAT CTCU U EATER NSTALLATION SECTION 1: HEATER SAFETY Your Safety is Important to Us! This symbol is used throughout the manual to notify you of possible fire, electrical or burn hazards. Please pay special attention when reading and following the warnings in these sections. -
Page 9: Section 3: Critical Considerations
SECTION 3: CRITICAL CONSIDERATIONS 3.1 Basic Information CTCU heaters have automatic ignition burners for ON/OFF operation only. 3.2 Location and Suspension All models: • Must be installed indoors. • Must be installed in a level position with horizon- tal or vertical discharge. •... -
Page 10: Figure 1: Installation Clearances And Clearances To Combustibles
® COMBAT CTCU U EATER NSTALLATION Figure 1: Installation Clearances and Clearances to Combustibles * Heaters may be mounted at a higher level if destratification fans are installed. The heater must always be installed at least 1.8 m above the floor. The flue pipe must have clearance from combustibles by 5 cm. -
Page 11: Section 4: Specifications
SECTION 4: SPECIFICATIONS 4.1 CTCUA (All Models) * 140 for 27 - 32 Dimension Data - CTCUA (All Models) Model Height Mounting Hole Spacing Centre of Flue (Top Option) Centre of Flue Weight CTCU-7 CTCU-11 (in) (12.0) (12.0) (9.4) (9.4) (in) (in) (5.9) -
Page 12: General Technical Data Table (All Models)
® COMBAT CTCU U EATER NSTALLATION 4.2 General Technical Data Table (All Models) CTCUA, Axial Fans Total Electrical Load Run Current Start Current Air Flow Sound Pressure Level at 3 m Flue and AIr Intake Flue and Air Intake Size *Maximum Straight Flue/Air Intake Electrical load at 230 V 50 Hz measured by calculating from total run current of appliance. -
Page 13: Section 5: Heater Installation
SECTION 5: HEATER INSTALLATION 5.1 General Heaters are designed for installation above 1.8 m. These heaters must be installed within the heated space. Duct delivery systems are not permitted with axial fans. When handling or supporting the heater from below, ensure that the weight is taken at the support points. -
Page 14: Figure 3: Shelf Mounting And Hanging Suspension
® COMBAT CTCU U EATER NSTALLATION Figure 3: Shelf Mounting and Hanging Suspension Description Wall Shelf Mounting Bracket Kit Wall Suspension Mounting Bracket Kit Shelf Mounting Bracket Kit Hardware provided to construct mounting bracket assembly only. Figure 4: Vertical Louvres (Optional) Description Part Number Vertical Louvre Kit... -
Page 15: Section 6: Flue Installation
SECTION 6: FLUE INSTALLATION 6.1 Changing Flue and Air Intake Orientation The heater is sold with horizontal flue and fresh air connections as standard. If vertical flue and fresh air connections are required, follow the instructions on Page 29, Section 15.4. 6.2 Flue Installation The flue must terminate outside of the building. -
Page 16: Figure 6: Vertical And Horizontal Flue Termination
® COMBAT CTCU U EATER NSTALLATION Figure 6: Vertical and Horizontal Flue Termination - Type B Figure 7: Vertical and Horizontal Flue Termination - Type C PERATION AND ERVICE ANUAL Appliance & C Appliances... -
Page 17: Section 7: Air Supply
When installed as a room sealed heater, the air for combustion is drawn in from outside the building. It is important to ensure that there is adequate ventilation to provide air for the distribution fan. 7.2 Open Flued Installation It is important to ensure that there is adequate air... -
Page 18: Section 8: Gas Piping
® COMBAT CTCU U EATER NSTALLATION SECTION 8: GAS PIPING It is important that the gas supply pipe and the electrical connections do not support any of the heater’s weight. A gas meter is connected to the service pipe by the gas supply company. -
Page 19: Section 9: Wiring And Electrical Information
A switch or control wired between L 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. ® IRING AND... -
Page 20: Ctcua Wiring Diagram Models 7 - 32
® COMBAT CTCU U EATER NSTALLATION 9.3 CTCUA Wiring Diagram Models 7 - 32 NOTE: If any of the original wire supplied with the heater must be replaced, it must be replaced with wiring material having a temperature rating of at least 105° C and 600 volts. PERATION AND ERVICE ANUAL... -
Page 21: Section 10: Commissioning
Ensure that the air is fully purged from the heater inlet pipe up to the main gas valve inlet test nipple. 10.1.4 Mechanical Checks 1. Check that the fan is free to run and delivery louvres are turned to give required air deflection. -
Page 22: Figure 9: Automatic Burner Control Box Sequence
® COMBAT CTCU U EATER NSTALLATION Figure 9: Automatic Burner Control Box Sequence If at any stage the flame fails, the control will go into "lockout". The red light inside the RESET switch will illuminate and the control will need to be manually reset before any further start attempt can be made. -
Page 23: Complete The Commissioning
10.2.5 Turning Off the Heater Set the external controls to the "OFF" position and the main burner will stop. The fan will run until it is stopped automatically by the fan thermostat. Do not use Electrical Isolator for control of heater. -
Page 24: Section 11: User Instructions
Figure 11: Heater Operating Sequence 11.3 Common 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. -
Page 25: Simple Fault Finding
Set the installed remote controls to the "OFF" position. The burner will turn off immediately. The fan will continue to run for a few minutes. To restart, turn the control used above to "ON". 11.5 Simple Fault Finding Some possible reasons for the heater not operating are: 1. -
Page 26: Section 12: Servicing
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. ®... -
Page 27: Section 13: Conversion Between Gases
SECTION 13: CONVERSION BETWEEN GASES 13.1 General Conversion between gases will require a change of burner injectors and the gas valve re-commissioning to the new conditions. 13.2 Burner Conversion Conversion of the burner assembly from one gas to the other is the same for all types of heaters. 1. -
Page 28: Section 14: Troubleshooting
® COMBAT CTCU U EATER NSTALLATION SECTION 14: TROUBLESHOOTING 14.1 General For your safety and optimum heater performance, use only ROBERTS GORDON Conduct Commissioning procedure as shown on Page 15, Section 10. PERATION AND ERVICE ANUAL ® replacement parts. -
Page 29: Troubleshooting For Automatic Ignition Burner Systems
SECTION 14: T ROUBLESHOOTING 14.2 Troubleshooting For Automatic Ignition Burner Systems For your safety and optimum heater performance, ® use only ROBERTS GORDON replacement parts. Conduct Commissioning procedure as shown on Page 15, Section 10. -
Page 30: Troubleshooting For Flame Supervision System
® COMBAT CTCU U EATER NSTALLATION 14.3 Troubleshooting for Flame Supervision System To measure flame current, connect a 0 - 50 μA DC meter in series with the flame probe. If the meter reads negative values, then reverse the test leads. NOTE: Minimum flame probe current 1 μA DC. -
Page 31: Troubleshooting For Solenoid Valves
14.4 Troubleshooting for Solenoid Valves 14.5 Troubleshooting for Main Fan For your safety and optimum heater performance, use only genuine ROBERTS GORDON parts. Conduct Commissioning procedure as shown on Page 15, Section 10. ROUBLESHOOTING ® replacement... -
Page 32: Section 15: Removal And Replacement Parts
® COMBAT CTCU U EATER NSTALLATION SECTION 15: REMOVAL AND REPLACEMENT PARTS See warnings and notes on Page 20, Section 12 before removing or replacing parts. Burner Components All serviceable burner parts are accessed by the door on the side of the heater. Remove the four sheetmetal screws. -
Page 33: Burner Compartment
15.2 Burner Compartment 15.2.1 Burner Injectors MODEL CTCU-7 Injector Quantity Natural Gas (G20) Injector size mm Ø 1.78 in Ø 0.070 Marking RG P/N 91930050 Natural Gas (G25) Injector size mm Ø 1.99 in Ø 0.0785 Marking RG P/N 91930047 LPG Propane (G31) and LPG Butane (G30) Injector size mm Ø... -
Page 34: Ignition Electrode And Flame Probe
Pull out from mounting. Refit in reverse ensuring that the gap to burner is as shown in the front view of the burner compartment. Description Part Number Spark Electrode Automatic Ignition Flame Probe Burners Fan Thermostat Limit Thermostat PERATION AND ERVICE ANUAL 90427411 90439300... -
Page 35: Flue Fan Vertical Installation
RG P/N IT IS IMPORTANT THAT ONLY THE CORRECT FLUE FAN SPECIFIED FOR EACH MODEL TYPE IS USED WHEN REPLACING THESE ITEMS. Carry out a commission after working on or changing a flue fan. See Page 18, Section 11. CTCU-7 CTCU-11... -
Page 36: Pressure Switch
® COMBAT CTCU U EATER NSTALLATION 15.5 Pressure Switch Pull off 3 way connector. Spring open plastic clips of mounting cradle. Replace with correct type of pressure switch for model. The pressure switches are colour coded for each pressure setting. Carry out a commission after working on or changing a pressure switch. -
Page 37: Ignition Control
Fit rubber washers to the guard mountings to reduce vibration. • Check that the fan blades are free to rotate before turning on the power to the fan. • Strictly comply with the colour code of the fan wires to ensure correct operation.