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Than screw the cover plug up tight. While effecting this operation heat carrier leakages from the pump are
possible, after installing the cover plug the rests of heat carrier must
be removed from the boilers components (you must wipe them);
10) also check the boiler connection to the AC outlet of the
monophase network of alternate current with rated
voltage of 220V, 50Hz frequency, with an earth bonding
contact;
11) Also check the heating system's air-tightness.
Scheme 12. Circulation pump check
Technical staff manual
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