Technical data

9 Servicing

Instructions for Installation and Servicing turboMAX pro R328

9.2 Cleaning the burner and primary heat exchanger

• Turn off the boiler.

• Isolate the electrical supply to the boiler.

• Remove the boiler case as described.

• Turn off the gas service valve.

• Turn off the boiler CH service valves.

• Turn off the cold water inlet service valve.

• Release the three clamps (1), remove the combustion

chamber cover (2).

• Pull the three cables (4) and two tubes (5) from the

fan assembly.

• Remove the fan assembly (6a, 6b, 6c).

• Remove the four screws (7) and detach the front

cover panel from the combustion chamber (8).

• Check the burner (9) and heat exchanger fins (10) and

remove any loose deposits with a soft brush.

• Reassemble in reverse order.

• Check central heating expansion vessel.

Note!

It is not necessary to carry out this check

every year – a check every three years should

be sufficient.

• Release the system water pressure from the boiler.

• Remove valve cap from expansion vessel charge point.

• Check that the internal charge pressure of expansion

vessel is between 0.7 - 0.9 bar. If pressure is lower

than this the vessel should be re-pressurised using an

air pump.

• Refit valve cap.

• Open central heating service valves and re-pressurise

the boiler and heating system if necessary.

• Open the gas service valve.

• Turn on the mains power supply.

• Operate the boiler and carry out soundness, safety

and function checks.

• Complete the service interval record section in the

Benchmark gas boiler commissioning checklist.

Fig. 9.1 Cleaning the burner and primary heat exchanger

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