Air cooled water chillers and heat pumps
with radial fans
IDRA - RSC Series
Use, installation and maintenance manual
23
GB
WINTER STOP
If the hydraulic circuit has been charged with water, it is mandatory to blow it out at the end of summer to prevent it from
freezing during winter. If the circuit has been charged with glycol-water mixture, the operation is not necessary.
Before winter begins, verify the glycol concentration with a densimeter; if necessary, refi ll the circuit.
Maintenance
We suggest a monthly maintenance procedure to be carried out as follows:
- verify the tightening of the bolts fi xing the fans to the grilles and the grilles to the unit structure;
- verify the condensing coils are clean to guarantee an effi cient heat exchange. Remove all the dirt on their surface with a
jet of air. The aluminium fi ns are 0,12 mm thin, throw the jet of air perpendicularly to the coils surface to prevent damages
to them and, in any case, pay particular attention to all the cleaning procedure.
If the fi ns are damaged, line them up with a suitable tool (metal comb).
Before operating on the coils, wear protective gloves; the accidental contact with the fi ns may cause small cuts.
- verify the insulation of the electrical feeding cables is not damaged;
- verify the tightening of the bolts that fi x the wires to the electrical components present in the electrical board.
- verify the hydraulic circuit has no leakages;
- check, while the compressors are operating, the supply and suction pressures. Remove the panels of the compressors
cabinet and connect the pressure switches to the pressure gauges in the cooling circuit. Only qualifi ed operators are enti-
tled to operate with the cooling circuit.
- check the oil level of the compressors through the sight glass.
UNIT DISMANTLING
Only qualifi ed operators are entitled to dismantle the unit; recover the refrigerant and the compressors lubricant as per
law in force.
