Related Manuals for Ambirad COBRA CB40
Summary of Contents for Ambirad COBRA CB40
- Page 1 COBRA GAS FIRED RADIANT TUBE HEATERS Operation, maintenance and servicing manual C B 4 0...
- Page 2 I n d e x Gas supply/connection/technical data Electrical connection Fan assembly Cobra herringbone gas radiant heaters Health & safety Installation - suggested methods of heater suspension Minimum mounting heights and clearances Installation of Cobra heaters Flue connection Access to the burner gas/flue/electrical connection Fresh air ducted inlet (all models) Commissioning for individually flued and unflued heaters Routine service...
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Page 3: Natural Gas
1 Gas supply/connection/ from the Health and Safety at Works Act The complete installation must be tested 1974. In addition the installation must be for soundness as described in the technical data carried out in accordance with the previous standard. current IEE 1992 (BS 7671), BS 6896:1991 This heater is for use on:- The gas supply must not be in the... - Page 4 Figure 1 Correct installation of flexible gas connection Corrugated Flexible Metallic Hose Assemblies to BS 6501 Part 1 1991 Class 1 Type C Construction 1 m long - Ambi-Rad Part No. 6500-2 Note Correct installation as shown will allow for approx 150mm of movement due to expansion. This installation layout is the only method recommended by the institute of Gas Engineers, the m a n u f a c t u rer and Ambi-Rad Ltd.
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Page 5: Electrical Connection
2 Electrical connection Alternatively, connection may be made via a fused three pin plug and un-switched Circuits and controls shuttered socket, both complying with the requirements of BS 1361:1971 (1986). All such controls and switchgear must be This appliance must be earthed. Ensure that a copy of the lighting rated to handle the total inductive load of instructions plate is affixed adjacent to the... -
Page 6: Health And Safety
3 Fan assembly 7 Minimum mounting heights and clearances Note: For both horizontal and inclined The recommended minimum mounting mounting the fan assembly must be heights, along with the recommended perfectly vertical with the fan outlet clearance to combustibles for the Cobra facing upwards. -
Page 7: Installation
8 Installation of Cobra heater Wall mounting brackets must support the heater at an angle of inclination between 30˚ and 45˚, and are available from the Health & safety manufacturer. The angle can be varied by A qualified installer is required to install adjusting the drop rods or chain on each the appliance in accordance with the rules bracket. -
Page 8: Flue Connection
9 Flue connection Flue technical details Model CB40 Gas type Natural Gas (G20) Mass flow rate of flue gases (kg/s) 0.0185 Flue gas temperature (˚C) @ flue outlet Flue pressure (Pa) Positive Figure 5 For calculation method for flue sizing see If the heater is installed without a flue, Appendix 1 on page 14. -
Page 9: Fresh Air Ducted Inlet (All Models)
10 Access to the burner gas/ 12Commissioning for out (re earth continuity polarity and resistance to earth). flue/electrical connection individually flued and unflued heaters To shut down the heater, switch off the power supply to the heater. Automatic To gain access remove the six bolts control of the heater or a series of heaters Inspect installation and ensure that it has securing the two sections of the ball... - Page 10 Slacken pressure test point screw nearest Hand the ‘User Instructions’ to the user Drop down access door on front of heater the burner head and connect a ‘U’ tube and explain how to operate the heater and by releasing the quarter turn fixings. manometer to the pressure test nipple controls.
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Page 11: Herringbone Adjustment
Through the two holes view down the tubes Combustion fan Figure 19 and if carbon deposits are evident clean To remove the combustion fan with a suitable rod. disconnect the electrical connection from R e f l e c t o r the burner/control assembly and remove the fan securing screws to the side of the It is recommended that the reflector is... - Page 12 15Replacement and servicing of components in the burner assembly Figure 17 Cobra burner assembly Mains input Burner Head Gas Va l v e Va c u u m s w i t c h Ignitor Assembly Burner Extrusion Electronic Sequence C o n t r o l l e r Injector Figure 20...
- Page 13 Electrode assembly Figure 21 Figure 24 Remove the two screws securing the Disconnect gas fittings, disconnect electrode assembly. Disconnect the wiring harness from valve. Remove leads, and remove. Check for cracked or rear panel of burner box. Remove the damaged ceramic. Clean or replace as two screws securing the gas valve to necessary.
- Page 14 Vacuum switch Figure 27 Figure 26 Remove the two screws securing the Disconnect the two silicon rubber tubes vacuum switch in position. Refit and the electrical connectors. Noting components in reverse order of removal. correct orientation. Figure 28 S.I.T vacuum proving switch connections...
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Page 15: Troubleshooting Checklist
16 Trouble shooting checklist Ensure Gas and Electricity supplies are enabled. C h e c k 1. Burner controller. 2. Red neon. Is there power on Does the red the burner? neon illuminate. C h e c k 1. Operation of any thermostat. 2. -
Page 16: Spare Parts
17 Spare parts Description Part Number Igniter probes 201284 Burner head 200974 Orifice plate gaskets 201069 + 201208 Combustion fan 2501 Pactrol control box 2015 Gas valve 2052 Red neon 2180 Amber neon 2175 Wiring harness 900224 Neon lamp wiring harness 200254 Burner head wiring assembly... - Page 17 Example 100mm diameter 125 diameter inlet resistance of actual flue outlet resistance of actual flue inlet resistance of equivalent flue outlet resistance of equivalent flue is the vertical height of the actual or proposed flue measured from the flue spigot other resistances of actual flue terminal (1) 0.25...
- Page 18 19 User instructions for Ambi-Rad Cobra series of heaters Cobra is an overhead radiant heating system for industrial and commercial buildings. The Cobra heater is suspended horizontally overhead from the roof or inclined mounted at 30˚ to 45˚ from the horizontal and heats by radiation in the same way as the sun. Important Information 1.
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