OPERATING AND MAINTENANCE MANUAL
Chapter 4 - Description
iC 215 ÷ iC 780
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The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited
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4.3 Condenser
Condensation occurs in finned core coils composed of copper tubes and headers, corrugated aluminium fins, and galvanized
sheet metal shoulders.
4.4 Evaporator
The evaporator is of the finned core type; water flows in contact with the finned surface at velocities such as to ensure low
pressure drops, while the refrigerant flows through the tubes.
Models iC 215÷545 can be alternatively equipped with a plate evaporator.
In these models the exchanger is protected from the risk of ice formation caused by low evaporation temperatures, with anti-
freeze strategies handled by the electronic controller. The evaporator water outlet temperature is controlled by a probe. If
negative room/water temperatures are required, a mixture of water and glycol must be used.
To drain the circuit refer to “9.4 Draining the process water circuit”.
4.5 Tank
The storage tank is cylindrical.
The tank can be protected against freezing by means of an electric heater managed by the electronic controller. A level sensor
in the tank serves to signal low water level conditions. The standard supply includes anti-condensation cladding, a drain
valve and an air bleed valve.
An internal bypass between the water delivery and return connections makes it possible to read the anti-freeze probe if the
unit’s process water inlet and outlet connections are inadvertently closed. In this case the unit stops due to tripping of the
anti-freeze alarm and the shut-off valves must be reopened.
The bypass serves exclusively to allow an anti-freeze alarm to trip (if present) and to allow the pump to run with a reduced
water flow rate without damage. It is advisable to avoid repeated anti-freeze alarm trip cycles in the foregoing conditions.
4.6 Pump
The unit is equipped with centrifugal pumps that can be of two different types, characterised by their ability to provide
different pressure heads depending on requirements (3 and 5 barg pump). The unit can also be supplied without an installed
pump.
In certain models the unit can be equipped with a tandem pump, which is managed by the controller.
The pump seals are in silicon carbide/silicon carbide/EPDM.
Bleed the circuit by unscrewing the bleed cap on the pump whenever the hydraulic circuit is filled. See 5.4 “Hydraulic
connections”.
The pump must never run dry.
4.7 Fans
4.7.1 Axial
The fans are of the axial flow type, comprising a diecast aluminium fan wheel with sickle shaped blades.
The protection rating of the fans is IP54 for all models except iC 215÷220, which are equipped with IP44 fans.
All fans feature insulation class F to ensure they are compatible with outdoor operation in all climates. Fan assembly is
completed by an upper safety grille (supporting the fan).
The axial flow fans feature ON/OFF operation or electronic speed control.
The speed control is not installed in dual frequency models.
For models iC 303÷780 it is possible to fit a semi-transparent container kit,
secured to the rear of the unit. In steady state conditions the water level in
the container must be approximately at the half-way point. In this case
water filling is performed via the container kit.
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