Quality in Any Language
Combat
If you smell gas
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2007 Roberts-Gordon,LLC
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TABLE OF FIGURES
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Product Approval
SECTION 2 INSTALLER RESPONSIBILITY
SECTION 1 HEATER SAFETY
2.1 Clearances to Combustibles
2.2 Corrosive Chemicals
3.4 Clearances to Combustibles
3.3 Minimum Required Installation Clearances
3.5 Ventilation
3.6 Gas Supply
Installation Clearances
Dimension Data - CTUA All Models
SECTION 4 SPECIFICATIONS 4.1 CTUA
Top View
End View
4.2 CTUB, CTUC and CTUD
Dimension Data - CTUB, CTUC and CTUD
4.3 General Technical Data Table
4.4Technical Data Table Appliance Category II 2H/L 3B/P
5.2 Handling
SECTION 5 HEATER INSTALLATION 5.1 General
Figure 2 Suspension Methods
5.3 Shelf Mounting and Suspension
6.3 Type B22 Appliance
terminal. See Page 11, Figure
See Page 10, Figure 3 through Page 11, Figure
6.3.1 Air Intake Terminal Cover
Roof Terminal
7.2 Open Flued Installation
7.1 Room Sealed Installation
7.2.1 Heaters Installed Within the Heated Space
SECTION 7 AIR SUPPLY
Figure 8 Ducting
SECTION 8 OPTIONAL HEATER CONFIGURATIONS
8.1.1 CTUD Heaters
9.1 Connections
SECTION 9 GAS PIPING
10.2 Remote Controls
SECTION 10 WIRING AND ELECTRICAL INFORMATION
10.1 Electrical Supply
Models
IGNITION MODULE
10.3 CTUA Wiring Diagram Models
IGNITION MODULE
SECTION 10 WIRING AND ELECTRICAL INFORMATION
SITE WIRING
10.4 CTUA Wiring Diagram Models
10.5 CTUB/C Wiring Diagram Models
SITE WIRING
IGNITION MODULE
IGNITION MODULE
SITE WIRING
10.6 CTUB/C Wiring Diagram Models
SECTION 10 WIRING AND ELECTRICAL INFORMATION
IGNITION MODULE
SITE WIRING
10.7 CTUB/C Wiring Diagram Models
For external fan wiring
10.8 CTUD Wiring Diagram Models
See Page 23, Section
SITE WIRING
See Page 23, Section
10.9 CTUD Wiring Diagram Models
SITE
Single Phase Motor with Load over 7 Amps
11.1 Pre-CommissionChecks
SECTION 11 COMMISSIONING
11.1.1 Louvres
11.1.2 Electrical Checks
Figure 11 Gas Valve for Heater Models
Figure 10 Automatic Burner Control Box Sequence
Figure 12 Gas Valve for Heater Models
11.5 Combustion Testing
Check Gas Rate
11.6 Turning Off the Heater
11.9 Instruction to the User
11.7 External Controls
11.8 Complete the Commissioning
See Page 28, Section
12.3.2 Burner Lockout Reset Button
12.2 Heater Operation
Figure 13 Heater Operating Sequence
12.5.1 Simple Fault Finding Burner Faults
12.5 Simple Fault Finding
12.4.2 To Turn the Heater Off
See Page 5, Section
13.3 Fan/Motor Assembly Maintenance
13.2 Burner Maintenance
13.4 Heat Exchanger Maintenance
13.5 Gas Control Valve Maintenance
14.3 Gas Valves
SECTION 14 CONVERSION BETWEEN GASES 14.1 General
14.2 Burner Conversion
SECTION 15 TROUBLESHOOTING 15.1 General
on Page 24, Section
For your safety and optimum heater performance
Conduct Commissioning procedure as shown
15.4Troubleshooting for Solenoid Valves
15.3Troubleshooting for Flame Supervision System
Burner Components
SECTION 16 REMOVAL AND REPLACEMENT PARTS
16.1 Gas Valve
16.1.1 Models
16.2.1 Burner Injectors
16.2 Burner Compartment
Ensure gas tight fitting of injectors
Ensure correct alignment with burners
16.3 Ignition Electrode and Flame Probe
16.4 Flue Fan
16.5 Pressure Switch
16.7.1 Fan Removal and Replacement
16.7 CTUA Axial Fan/Guard/Motor Assembly
16.7.2 To Replace the Fan Assembly
16.8.1 Fan Removal and Replacement
16.9 Fan Data
Figure 14 Centrifugal Fan Orientation
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injury or property damage
Fire Hazard
close to heater
Thermostat 2A 
N L 1 2 3