MD22 INSTRUCTION MANUAL
12
Open the isolation valves and start
the heating system.
Have a bucket ready to collect
spillage and partially open the
drain valve (using the cap as a tool)
to purge air from the device. Close
the drain valve once water starts to
flow. Bleed the device again after
the system has reached
temperature. Take care as the
water will be hot. Replace drain
cap.
13
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