Rev. 3 02-2021
33
MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English
Emibyte DXi.H/DXi.HF
Direct expansion close control
The connections are planned on the bottom for all the series unit;
The option
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can be requested in order to raise the unit (lateral connections base frame); water connections are
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4.9.4
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After the watertight check of the system, if it’s expected that the system will be started after a long lapse or, however,
that the ambient temperature could drop to values near or lower than 0°C, it will be necessary to discharge the water
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If the circuit operates with a nonfreezing mixture, insert in the circuit the appropriate quantity of pure nonfreezing
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Keep water pressure in the circuit between 1,5 and 3,5 bar. Install one or more membrane expansion vessel with
adequate volume and charge pressure.
4.9.4
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Per la connessione dell’unità al circuito idraulico utilizzare le zone predisposte; i diametri delle connessioni idrauliche delle varie unità sono
elencate nelle tabelle dedicate.
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• Open all the air bleed valves in the circuit.
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equipped with check valve, adequate to the foreseen temperature levels and to the system volume.
• Start loading the system with water.
• Close all the air bleed valves in the system when the air doesn’t come out anymore, but only water comes out.
• Keep on loading water in the system until the system reaches a pressure between 1,5 and 3,5 bar (recomended operation pressure).
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points equipped with air vent.
After 2 hours, switch off the pumps and discharge the air, if present, gathered in the air vents placed in the system. Load again water in the
circuit in order to restore the previous pressure.
Repeat the operation until the air doesn’t come out anymore from the air vents.
