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Rev. 3 02-2021
51
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
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planned operation conditions.
To switch ON the unit rotate the main switch in ON position in order to supply it.
Once powered the unit, after a short controller auto-test period, it is necessary to press ON/OFF key switching into ON; afer that in accor-
dance with settled parameters and thermally-hygro thermic conditions detected, all the unit devices will switch on.
Once the unit reaches a nominal operation, the technician in charge must detects the operating parameters.
The data must be registered on the First Start Up Report, attached to the present Manual.
Ensure the unit is Switched OFF from the keyboard.
Wait at least 12 hours before to switch on the unit so as to allow the crankcase heater to heat the oil in the
compressors.
Check the fans and compressors rotation if the power supply is of three phases; if the rotation is wrong will be
necessary to invert two of three phases on the main switch terminals.
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Checks the fans rotation; if is wrong turn off immediately the main switch and invert two of three phases of the main switch in order to invert
the motor rotation.
After few hours of nominal working check the sight glass, it must be of green color, in case of the glass is yellow humidity could be present
inside the circuit; it will be necessary to dehydrating the circuit (operation performed by expert technicians).
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inside the circuit.
However, the presence of some steam bubble is permitted.