TABLE OF CONTENTS

SECTION 1: Heater Safety

2

SECTION 12: User Instructions

28

SECTION 2: Installer Responsibility

2

12.1

User Instructions

28

2.1

Clearances to Combustibles

2

12.2

Heater Operation

28

2.2

Corrosive Chemicals

2

12.3

Common User Controls

28

2.3

National Standards and Applicable Codes

2

12.4

Lighting Instructions

28

SECTION 3: Critical Considerations

3

12.5

Simple Fault Finding

29

3.1

Basic Information

3

SECTION 13: Servicing

30

3.2

Location and Suspension

3

13.1

Servicing Instructions

30

3.3

Minimum Required Installation Clearances

3

13.2

Burner Maintenance

30

3.4

Clearances to Combustibles

3

13.3

Fan/Motor Assembly Maintenance

30

3.5

Ventilation

3

13.4

Heat Exchanger Maintenance

30

3.6

Gas Supply

3

13.5

Gas Control Valve Maintenance

30

3.7

Electrical Supply

3

13.6

Flue Fan

30

3.8

Flue

3

SECTION 14: Conversion Between Gases

31

SECTION 4: Specifications

5

14.1

General

31

4.1

CTUA

5

14.2

Burner Conversion

31

4.2 CTUB, CTUC and CTUD

6

14.3 Gas Valves

31

4.3

General Technical Data Table

7

SECTION 15: Troubleshooting

32

4.4

Technical Data Table

8

15.1

General

32

SECTION 5: Heater Installation

9

15.2

Troubleshooting For Automatic Ignition Burner

 

5.1

General

9

 

Systems

33

5.2

Handling

9

15.3

Troubleshooting for Flame Supervision System

34

5.3

Shelf Mounting and Suspension

9

15.4

Troubleshooting for Solenoid Valves

34

SECTION 6: Flue Installation

10

SECTION 16: Removal and Replacement Parts

35

6.1

Flue Installation

10

16.1

Gas Valve

35

6.2

Type C12, C32 & C62 Appliance

10

16.2

Burner Compartment

36

6.3

Type B22 Appliance

10

16.3

Ignition Electrode and Flame Probe

37

SECTION 7: Air Supply

12

16.4

Flue Fan

38

7.1 Room Sealed Installation

12

16.5

Pressure Switch

39

7.2 Open Flued Installation

12

16.6

Ignition Control

40

7.3 Building Ventilation

12

16.7

CTUA Axial Fan/Guard/Motor Assembly

40

7.4 Isolated Equipment Rooms

12

16.8

CTUB & CTUC Centrifugal Fan/Guard/Motor

 

SECTION 8: Optional Heater Configurations

13

 

Assembly

40

8.1

Distribution Duct Work for CTUB, CTUC and CTUD

 

16.9

Fan Data

41

 

Heaters

13

 

 

 

SECTION 9: Gas Piping

14

 

 

 

9.1

Connections

14

 

 

 

SECTION 10: Wiring and Electrical Information

15

 

 

 

10.1 Electrical Supply

15

 

 

 

10.2 Remote Controls

15

 

 

 

10.3 CTUA Wiring Diagram (Models 22-60)

16

 

 

 

10.4 CTUA Wiring Diagram (Models 75-115)

17

 

 

 

10.5 CTUB/C Wiring Diagram (Models 22-40)

18

 

 

 

10.6 CTUB/C Wiring Diagram (Models 50-60)

19

 

 

 

10.7 CTUB/C Wiring Diagram (Models 75-115)

20

 

 

 

10.8 CTUD Wiring Diagram (Models 22-60)

21

 

 

 

10.9 CTUD Wiring Diagram (Models 75-115)

22

 

 

 

10.10 CTUD External Motor Alternative Wiring &

 

 

 

 

 

Optional Thermostat/Time Switch

23

 

 

 

SECTION 11: Commissioning

24

 

 

 

11.1 Pre-Commission Checks

24

 

 

 

11.2 Gas Supply

24

 

 

 

11.3 Mechanical Checks

24

 

 

 

11.4 Begin Commissioning

24

 

 

 

11.5 Combustion Testing

26

 

 

 

11.6 Turning Off the Heater

26

 

 

 

11.7 External Controls

27

 

 

 

11.8 Complete the Commissioning

27

 

 

 

11.9 Instruction to the User

27

 

 

 

©2007 Roberts-Gordon, LLC

All rights reserved. No part of this work covered by the copyrights herein may be reproduced or copied in any form or by any means - graphic, electronic, or mechanical, including photocopying, recording, taping or information storage and retrieval systems - without the written permission of Roberts-Gordon, LLC.

Printed in U.K.

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Roberts Gorden CTU 22 TO 115 service manual Roberts-Gordon, LLC
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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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