zero water pressure in the boiler
When the water rises in the heating system to a physical law also tends to raise the water pressure. If the expansion tank
is not loading (laundry or just deflated) when the pressure reaches about 2.5 Ate ago intervene safety valve calibrated at 3 Ate boiler
that drains water, lowering the pressure even down to zero . For the repair check the expansion tank is loaded (note the verification should be performed to gauge the value of zero. Load the expansion tank with a compressor to about 0.75 ate (if the facility is all on one floor), refilled the boiler. Usually when the expansion tank is not punctured, the inlet valve is heard out of the air, but if only water is released most likely laundry.
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Reference codes:
expansion tank 8716142500 0
safety relief valve 8716142404 0
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