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5.0 START-UP AND CONTROL PANEL
5.0
START-UP AND CONTROL PANEL
5.1
FINAL CALIBRATION AND GUIDELINES FOR USE
After checking the seal, it is possible to fill the hydraulic circuit. Fill the hydraulic circuits with the type of liquid defined in the design phase (pure
water or mixtures of water and ethylene or propylene glycol). In climate zones where the temperature can fall below 0°C or when using fluids
with a temperature of below 5°C, it is necessary to mix the water with adequate quantities of glycol to stop the water from freezing.
Filling the hydraulic circuit with pure water
Open the air vent valve and connect it to a drain with a plastic tube to let the air in the circuit out during
filling and accelerate the filling phase. Make sure that any sprays of water that come out when the circuit is
full do not cause dangerous situations. If the system circuit has points set at a height above the air vent valve
of the machine, it is necessary to add another air vent valve in the highest point, preferably automatic, to
ensure that the circuit is completely full.
Connect the water drain cock of the machine to the aqueduct. The circuit will start to fill up when the water
supply from the aqueduct is turned on. When water comes out of the air vent valve tube, the circuit is full.
After filling the system and after making the pump circulate for a while, check that there is no remaining air.
If air is present, it will be necessary to let it out and refill the water in the circuit. Also check that, when the
system is not in operation, the pressure in the circuit is just above zero. This can be seen from the manometer on the machine (only for
versions with a pump and tank: Integrated Solution). If you have purchased a chiller without a pump and tank (Basic Solution), you are
advised to install a manometer directly on the system.
WHEN FILLING IS COMPLETE TURN OFF THE WATER OUTLET CONNECTION TO AVOID PUTTING THE CIRCUIT UNDER PRESSURE.
Filling the hydraulic circuit with a mixture of water and glycol
If anti-freeze mixtures need to be used, it will be necessary to fill the circuit with a pre-prepared solution depending on the temperature of the
water (as described in the previous chapters) or on the temperature of the air (in keeping with what is foreseen in the design phase). As it is not
possible to use a pre-prepared solution, it will have to be made
in a separate container, which must then be connected to the machine’s
water
drain, as described previously.
For further information, contact the Manufacturer
’s Technical Assist
ance Office.
Final operations before start-up
The initial start-up of the unit must always be carried out by specialised personnel. Before proceeding with start-up, the installer must check
that the system has been set up according to the requirements and technical specifications defined in the design phase. More specifically, it will
be necessary to check:
•
that the chiller has been installed correctly in keeping with all of the prescriptions in this manual
•
that the electrical connection is complete and that the supply characteristics correspond to the requested requirements
•
that the water connection has been completed correctly
•
that the water connection is full of liquid and under pressure
•
that the pumping systems work
•
that all of the water shut-off valves are open
•
that all of the safety criteria have been complied with
The professional figures involved in this chapter are: the
Operator
(he/she must always operate with the fixed protections correctly assembled
and ensure that there has been no tampering);
Mechanical maintenance technicians
(they must always operate with the machine at a standstill
and ensure that, after carrying out the requested operations, all of the protections are correctly reassembled and in working order; the
Person
in charge of safety
(he/she will ensure that employees have received all of the necessary information according to this manual and, in particular,
he/she will check that all of the fixed protections have been correctly assembled, work and have not been tampered with).
At least 6 hours before start-up, voltage must be supplied to the equipment to allow the compressor oil to be pre-heated with the special
resistance, if foreseen (optional accessory).
Pre-heating must be carried out during the initial start-up and each time the machine is turned off from the master switch with the
door lock for more than 4 hours. DO NOT PROCEED ANY FURTHER UNTIL THIS PROCEDURE HAS BEEN COMPLETED.
