59
DANGER
boiler at service switch. Close manual gas valve
to turn gas supply OFF to boiler. Failure to
comply will result in death or serious injury.
!
11.4 Draining the Boiler
•
• isolate electrical supply
• close boiler gas service cock
• allow boiler to cool
• drain boiler through onboard drain if available or
external drain valve.
11.5 Draining the Heating Circuit
• Follow all steps in 11.4.
•
• Connect suitable pipe to drain point.
• Route it to suitable container.
• Open drain tap.
11 - GENERAL MAINTENANCE AND CLEANING
in
in
in
11-1 ELECTRODES
240013375 REV A, [07/01/2021]
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