OPERATING AND MAINTENANCE MANUAL
Chapter 4 - Description
iC 215 ÷ iC 780
20
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
ENGLISH
EN
4 . 3
C o n d e n s e r
Condensation occurs in finned core coils composed of copper tubes and headers, corrugated aluminium fins, and galvanized
sheet metal shoulders.
4 . 4
E v a p o r a t o r
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
T a n k
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
P u m p
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.
ATTENTION
Bleed the circuit by unscrewing the bleed cap on the pump whenever the hydraulic circuit is filled. See 5.4 “Hydraulic
connections”.
NOTE
The pump must never run dry.
4 . 7
F a n s
4 . 7 . 1
A x i a l
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.
ATTENTION
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.