Measure Ionisation Current; Testing For Gas Leaks; Check The Operating Characteristics Of The Boiler; Final Steps - Bosch Worcester GB162-50 V2 Installation, Commissioning And Servicing Instructions

Commissioning
8.10

Measure ionisation current

▶ Take the boiler out of operation.
▶ Pull the connector plugs apart.
▶ Connect the multi-meter on both sides of the open plugs (in series).
1.
2.
Fig. 73 Connecting the multi-meter
▶ Select the μA measurement value at the multi-meter.
▶ Bring the boiler into operation.
▶ Make sure that the boiler can dissipate the heat generated.
▶ Start the chimney sweep mode ( Chapter 7.3).
▶ Set the smallest possible output value in % (partial load).
▶ Measure the ionisation current.
The ionisation current must be at least 3 μA.
▶ If the value is lower, check the gas/air ratio and the
monitoring electrode.
▶ Enter the value in the maintenance protocol ( Chapter 11.15).
▶ Switch off the chimney sweep mode.
▶ Take the boiler out of operation.
▶ Remove the multi-meter.
▶ Re-connect the ionisation plugs.
▶ Bring the boiler into operation.
8.11

Testing for gas leaks

NOTICE: Damage to the boiler due to short-circuit.
▶ When using leak detection spray, cover the plug and
cables.
▶ Start the chimney sweep mode ( Chapter 7.3).
▶ As soon as the burner is on, check all gas-carrying components using
an approved gas leak detection spray.
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▶ Check the rubber gasket [1] at the ignition unit and the monitoring
electrode for tightness.
Fig. 74 Inspecting the gas train
▶ Determine the cause of a possible leak.
▶ Take steps to remedy the leak.
▶ Exit the chimney sweep mode.
8.12
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▶ Create a heat demand and check whether the boiler starts burning
after several minutes to support the boiler operation.
▶ If applicable: open a DHW tap and check the DHW temperature and
DHW volume.
8.13
▶ Fit the casing.
▶ Complete the Benchmark checklist (50-V2 and 65-V2) or
commissioning report (85-V2 and 100-V2).
▶ Place second ID sticker [1] (part of the documentation set) at the
bottom right on the front cover.
Fig. 75 Second ID sticker
8.14
▶ Familiarise the user with the heating system and operation of the
boiler.
▶ Explain to the user how the heating system must be filled.
▶ Point out to the user that they must not carry out conversions, repairs
or maintenance themselves.
▶ Fill out the commissioning report to confirm commissioning
( Chapter 8.15).
▶ Hand the technical documentation to the user.
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Check the operating characteristics of the boiler

Final steps

1

Inform the user

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6720814332 (2018/04)