Centurion
 
  Packaged Radiant Tube Heaters
     
   
Cobra represents a radical new approach to gas fired radiant heating – a packaged heater that requires no on site assembly.
 
It can simply be unpacked and suspended into the roof space – dramatically reducing on site handling and installation time.
   
    Specification
     
    Cobra incorporates a 20kW gas fired burner suitable for natural gas (G20) and propane (G31).
    The Cobra is currently available in two sizes and is constructed from twin wall steel panels. Units can be installed unflued, individually flued, or on a central ‘herringbone’ manifold and can be fitted with ducted fresh air intake onto the burner to provide combustion air from outside the building.
    Cobra is very quiet in operation being rated at 40 and 48dB(A) for the 20 and 40kW models.
The noise levels can be further reduced by up to 6dB(A) by flueing the product and filling ducted fresh air.
    Cobra is despatched in shrink-wrapped packaging which can be left on when installed to protect the heater from soiling during other non-related building work.
The packaging then can simply be removed when the unit is commissioned.
    Cobra tube specification is of stainless and aluminised high temperature steel for improved longevity and performance.
    Protective ball guards and decorative grilles are available for applications in sports environments.
     
    Cobra benefits
     
   
No on site assembly – installation time reduced by up to 2 hours.   Easy to operate and maintain.
         
Ease of handling – no complex or fiddly components.   High temperature steel radiant tubes for longer life and performance.
         
Improved integration with building aesthetics.   Increased radiant and thermal efficiency – reduces running costs.
         
Balanced flue option available – no air vents need to be fitted.(next phase of development).   Minimises the impact of the Climate Change Levy.
         
Very quiet operation – ideal for commercial / public environments.      
         
    Colour coding
     
    Cobra is constructed from pre- coated steel with RAL9002 (Arctic White) and RAL7011 (Anthracite) being available as standard colours.
    The range of RAL colours shown below are available for a small additional charge. Please contact our sales department to check availability.
   
    Specification and technical data
   
 
   
MODEL
CB12
CB20 
CB40 
Nominal heat input G20 natural gas
kW
11.4
19.5
38
G31 propane
kW
11.4
18.5
-
Gas flow rate G20 natural gas
m3/h
1.1
1.85
3.6
G31 propane
m3/h
0.43
0.69
-
Gas supply
-
Connection R1/2 1/2in BSP external thread
Gas pressure
G20 natural gas
max. 25.0 (min.17.5)
G31 propane
max. 57.5 (min.25.0)
Electrical supply
-
230 volts 1 phase 50Hz
Current rating
-
0.55 amp max.(inductive)
External fuse rating
-
amps
3
Ignition
-
Electronic programme start-up with spark ignition
Noise level @3m 'free field'
-
48
40
Dimensions
-
mm
1710L x 1265W x 200D
2298L x 1865W x 256D
Flue diameter -
125mm single wall or 125mm twin wall
Ducted air diameter -
mm
102
102
102
Total installed weight -
Kg
91
91
152
Minimum mounting height -
m
4.3
5.2
5.7
Rec mounting height range* -
m
4.3-9.0
5.2-10.0
5.7-10.5
    * Note for mounting above or below these heights please contact technical department.
     
    Clearance from combustibles
     
   
MODEL
CB12 
CB20
CB40
Above reflector
mm
570
570
680
Beneath tubes
mm
1370
1600
2300
To the sides
mm
670
1050
1300
To the ends
mm
640
640
940
     
  ŠAmbi-Rad Limited 2005.