Roberts Gorden CTCU 27 General Technical Data Table All Models, CTCU-7 CTCU-11 CTCU-15 CTCU-22

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COMBAT® CTCU UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

4.2 General Technical Data Table (All Models)

 

Model

CTCU-7

CTCU-11

CTCU-15

CTCU-22

CTCU-27 / 32

 

 

 

 

 

 

 

CTCUA, Axial Fans

 

 

 

 

 

 

 

 

 

 

 

 

 

Total Electrical Load

W

260

274

336

384

345

 

 

 

 

 

 

 

Run Current

A

1.1

1.2

1.5

1.7

1.5

 

 

 

 

 

 

 

Start Current

A

1.7

1.8

2.5

2.9

2.6

 

 

 

 

 

 

 

Air Flow

m3/h

1120

1220

2710

2750

4474

 

 

 

 

 

 

 

 

[NR]

[31]

[35]

[39]

[42]

[42]

Sound Pressure Level at 3 m

dB(A)

37

41

45

48

48

 

 

 

 

 

 

 

Flue and AIr Intake

 

 

 

 

 

 

 

 

 

 

 

 

 

Flue and Air Intake Size

mm Ø

80

80

80

80

100

 

 

 

 

 

 

 

*Maximum Straight Flue/Air Intake

m

2.5

4

5

5

5

 

 

 

 

 

 

 

Electrical load at 230 V 50 Hz measured by calculating from total run current of appliance.

* Do not exceed the maximum length of flue stated or heater may not operate properly. Reduce the maximum length stated by 1 m for each 90° bend installed.

**If minimum air flow requirements are not met, then temperature limit devices will shut down the heater.

4.3Technical Data Table (All Models) Appliance Category II 2H/L 3B/P

 

Model

CTCU-7

CTCU-11

CTCU-15

CTCU-22

CTCU-27

CTCU-32

 

 

 

 

 

 

 

 

Heat Input

kW

8.5

13.4

18.3

27.5

33

38.5

Gross CV

(Btu/h) x (1000)

29

46

62

94

113

131

 

 

 

 

 

 

 

 

Heat Input

kW

7.7

12.1

16.5

24.8

29.7

34.7

Net CV

(Btu/h) x (1000)

26

41

56

85

101

118

 

 

 

 

 

 

 

 

Approximate

kW

7.1

11.1

15.1

23

27.2

31.7

Heat Output

(Btu/h) x (1000)

24

38

52

78

93

108

 

 

 

 

 

 

 

 

Natural Gas (G20) Data - Inlet Pressure 20 mbar (7.8 in WG) Min. 17 mbar (6.8 in WG) Max. 25 mbar (10 in WG)

 

 

 

 

 

 

 

 

Burner Pressure

mbar

9.5

9.5

9.5

9.5

9.0

9.0

 

 

 

 

 

 

 

 

Gas Rate

m3/h

0.8

1.3

1.7

2.6

3.1

3.6

ft3/h

29

45

62

93

110

127

 

 

 

 

 

 

 

 

Natural Gas (G25) Data - Inlet Pressure 25 mbar (10 in WG) Min. 20 mbar (7.8 in WG) Max. 30 mbar (12 in WG)

 

 

 

 

 

 

 

 

Burner Pressure

mbar

9.0

9.0

9.5

9.2

9.2

9.3

 

 

 

 

 

 

 

 

Gas Rate

m3/h

0.9

1.5

2.0

3

3.6

4.2

ft3/h

33

52

72

108

127

148

 

 

 

 

 

 

 

 

LPG / Propane (G31) Data - Inlet Pressure 37 mbar (14.6 WG) Min. 25 mbar (10 in WG) Max. 45 mbar (18 in WG)

Alternative where permitted 50 mbar (20 in WG) Min. 42.5 bar (17 in WG) Max. 57.5 mbar (23 in WG)

 

 

 

 

 

 

 

 

 

Burner Pressure

mbar

25.6

29.4

29.4

28.6

29.9

29.9

 

 

 

 

 

 

 

 

 

m3/h

0.3

0.5

0.7

1

1.2

1.4

Gas Rate

kg3/h

0.16

0.25

0.34

0.51

.61

.71

 

 

 

 

 

 

 

 

LPG / Butane (G30) Data - Inlet Pressure 29 mbar (11,4 in WG) Min. 20 mbar (7.8 in WG) Max. 35 mbar (13.8 WG)

Burner Pressure

mbar

19.2

21.9

22.9

21.4

21.4

22.4

 

 

 

 

 

 

 

 

 

m3/h

0.2

0.4

0.5

0.8

.9

1.1

Gas Rate

kg3/h

0.09

0.14

0.19

0.29

.34

.42

 

 

 

 

 

 

 

 

Gas rates corrected to standard conditions 1013.25 mbar 15° C.

6

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Contents Mbat Page Roberts-Gordon, LLC Page Table of Figures Page Product Approval Heater Safety Installer ResponsibilityClearances to Combustibles Corrosive ChemicalsMinimum Required Installation Clearances Critical Considerations 3.1 Basic InformationFlue 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 Flue Installation Flue InstallationChanging Flue and Air Intake Orientation Type B22 ApplianceVertical and Horizontal Flue Termination Type B22 Appliance Room Sealed Installation Open Flued InstallationHeaters Installed Within the Heated Space AIR SupplyGAS Piping ConnectionsWiring and Electrical Information Remote ControlsBurner Controls Thermostat Remote Fan ControlsSite Wiring Ctcua Wiring Diagram Models 7Commissioning LouvresMechanical Checks Begin Commissioning Before Operating the HeaterAutomatic Burner Control Box Sequence Combustion Testing Pressure SwitchCheck Gas Rate Turning Off the HeaterBurner Lockout Reset Button Heater OperationCommon User Controls 11.3.1 Fan Thermostat Limit ThermostatSimple Fault Finding Simple Fault Finding Burner FaultsTo Turn the Heater Off Burner Maintenance 12.3 Fan/Motor Assembly MaintenanceHeat Exchanger 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 Ctcua Axial Fan/Guard/Motor Assembly Fan Removal and ReplacementFan and Limit Thermostats 15.8.1 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.