Ambirad COBRA CB40 Installation, Operation, Maintenance And Service Manual Download Page 14

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Figure 28 S.I.T vacuum proving switch connections

Vacuum switch

Figure 26

Disconnect the two silicon rubber tubes
and the electrical connectors. Noting
correct orientation.

Figure 27

Remove the two screws securing the
vacuum switch in position. Refit
components in reverse order of removal.

Summary of Contents for COBRA CB40

Page 1: ...Operation maintenance and servicing manual CB40 GAS FIRED RADIANT TUBE HEATERS COBRA...

Page 2: ...s 8 Installation of Cobra heaters 9 Flue connection 10 Access to the burner gas flue electrical connection 11 Fresh air ducted inlet all models 12 Commissioning for individually flued and unflued heat...

Page 3: ...addition the installation must be carried out in accordance with the current IEE 1992 BS 7671 BS 6896 1991 Industrial Commercial and any other relevant British Standards and Codes of Practice A gas m...

Page 4: ...mmended by the institute of Gas Engineers the manufacturer and Ambi Rad Ltd These instructions must becarried out inaccordance withthe relevant provisions of the gas safety installation and use regula...

Page 5: ...if required manual control switches and a frost thermostat Circuits and controls All such controls and switchgear must be rated to handle the total inductive load of the circuit they control Load per...

Page 6: ...e case of drop rods a closed formed hook The hanging attachments to overhead steelwork etc must be purpose made to good sound engineering practice or of a proprietary type fixing They must be adequate...

Page 7: ...onstruction Alternatively 10mm diameter mild steel drop rods can be used Figure 4 Mounting of Cobra heater Wall mounting brackets must support the heater at an angle of inclination between 30 and 45 a...

Page 8: ...s an optional extra by the manufacturer must be fitted to the flue exit this kit connects from the flue outlet to a 5 adaptor The flue fitting is designed to accept either 5 single wall or 5 twin wall...

Page 9: ...will pull in Safe start checks are carried out automatically and a purge period of approximately 9 seconds will commence At the end of the purge period the ignition sequence will commence The spark ig...

Page 10: ...e section 10 Figure 10 Replace mains input connector and start the heater Using a suitable screwdriver adjust the pressure regulator if necessary set pressure as stated on data label Switch off the he...

Page 11: ...emove the combustion fan disconnect the electrical connection from the burner control assembly and remove the fan securing screws to the side of the burner box Figure 14 Figure 15 Remove fan spigot by...

Page 12: ...the product it is now possible to replace components as follows Injector Figure 18 Remove the four screws securing the burner spigot to the burner box Lift off the burner assembly and gasket checking...

Page 13: ...eed as follows Figure 23 Figure 24 Disconnect gas fittings disconnect wiring harness from valve Remove rear panel of burner box Remove the two screws securing the gas valve to the panel and two screws...

Page 14: ...ections Vacuum switch Figure 26 Disconnect the two silicon rubber tubes and the electrical connectors Noting correct orientation Figure 27 Remove the two screws securing the vacuum switch in position...

Page 15: ...sure 2 Burner nozzle pressure 3 Check live and neutral polarity and a good earth is present Check 1 Check vacuum switch tubes 2 Check emitter tubes air inlet and the flue is not obstructed 3 Check ope...

Page 16: ...ner head wiring assembly 900225 3 pin mains socket 2135 5 3 pin fan socket 3123 5 Silicone tube 2198 Fan air inlet 201125 Burner orifice plate 201063 08 Injector 201007 24 Vacuum switch 201013 17 Spar...

Page 17: ...flue pipe 5 46 1 75 6 06 2 He 2 50 6 22 Note 1m of actual flue with two 90 bends gives the minimum equivalent flue height of 0 25m for 100mm diameter flue and 0 62m for 125mm diameter flue The maximu...

Page 18: ...s again switch off heater and call out a service engineer Note U bend will glow but this is acceptable To switch off Cobra heater 1 Switch off electrical supply to the heater The burner will shut off...