26
■ After filling, ensure there are no more
air cushions in the system. When the
temperature falls, gas cushions form
negative pressure and this can draw
air into the system.
■ After initial filling and commissioning,
but after 14 days at the latest, clean
the integral dirt trap so the heat trans-
fer medium can flow freely.
■ Following any losses through leaks or
drawing off, top up the antifreeze sol-
ution according to the concentration
already in place. Establish the volume
of antifreeze as a check.
Water quality
Using antifreeze in boilers
(cont.)
5692 701 GB
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