US FLOOR / FLOOR
Minichiller inverter Duo
32
Be careful when working near the condensing coils.
The aluminum fins are very sharp and can cause serious injuries.
After the maintenance operations, close the panels fixing them with screws.
It is a good rule to carry out periodic checks in order to verify the proper operation of the unit.
OPERATION
1
month
4
month
6
month
Charging of the water circuit.
x
Presence of bubbles in the water circuit.
x
Check the proper working of the safety and control devices (indoor and outdoor units)
x
Check if there is a possible oil leakage from compressor (outdoor unit).
x
Check if there is a possible water leakage from the hydraulic circuit (indoor unit).
x
Check the proper working of the flow switches (outdoor unit).
x
Check out if the crankcase resistances are supplied and working properly (outdoor unit).
x
Clean the metallic filters of the hydraulic circuit.
x
Clean the finned coil by means of compressed air or water jet (outdoor unit).
x
Check if all the terminals on the electric board as well as on the terminals of the compressor
are properly fixed. Clean from time to time the remote control switch’s sliding and fixed
contactors (indoor and outdoor units).
x
Tightening of hydraulic connections.
x
Check the tightening and the balancing of the fan blades (outdoor unit).
x
Correct voltage.
x
Correct power absorption.
x
Check the refrigerant charge.
x
Check the operating pressure, and superheat and sub-cooling
x
Check of the efficiency of circulation pump.
x
Check the expansion tank.
x
If the unit should be out of service for a long period, discharge water from the piping and from
heat exchanger. This operation is necessary if, during seasonal stoppages, ambient
temperature is expected to go down below the freezing point of the employed fluid.
x
13.1
ENVIRONMENTAL PROTECTION
According to the norms dealing with the use of depleting stratospheric ozone substances, it is forbidden to release refrigerants
fluids in the atmosphere. They have to be collected and delivered to the seller or to proper gathering points at the end of their
operating life. Refrigerant R410A is mentioned among controlled substances and for this reason it has to be subjected to the
mentioned norms.
A particular care is recommended during service operations in order to reduce as much as possible any
refrigerant loss.
14
WHEN THE UNIT GOES OUT OF SERVICE
Once the unit is
arrived
at
the
end of its life cycle and needs to be removed or replaced, the following
operations
are
recommended.
•
the refrigerant has to be recuperated by trained people and sent to a proper collecting centre;
•
compressors’ lubricating oil has to be collected and sent to a proper collecting centre;
•
the frame and the various components, if not serviceable any longer, have to be dismantled and divided according to their
nature, particularly copper and aluminum, which are present in conspicuous quantity in the unit. These operations allow easy
material recover and recycling process, thus reducing the environmental impact.
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