TAEevo015÷351
13
MAINTENANCE AND OPERATING MANUAL
Chapter 4 - Description
The data inside this manual are not binding and they can be modified by the manufacturer without notice.
All rights reserved.
TAEevo015÷351
C
HAPTER
4
D
ESCRIPTION
4 . 1
C o m p o n e n t s
The data relating to the materials refer to standard machines. In case of particular units special materials are used, so it is necessary to refer to the
data on the offer.
The machines essentially consist of the following components:
•
Refrigerant compressor
•
Condenser
•
Evaporator
•
Tank
•
Pump
•
Frame/outer panelling
•
Electronic controller
4 . 2
C o o l i n g c i r c u i t
Models TAEevo have a single refrigerant circuit with one or two compressors connected in parallel (tandem).
The circuits consist of the following components:
•
refrigerant fluid used R407C;
•
piston hermetic compressor or scroll compressor;
•
fan pressure switch with on/off regulation;
•
pressure switches for high and low refrigerant pressure;
•
high pressure transducer for fan electronical regulation and for unloading (NOT present with 460/3/60 supply, centrifugal fans
and in TAEevo015÷020);
•
liquid solenoid valve (with prismatic tank and plate-type evaporator);
•
thermostatic throttle valve with external equalization (in models without prismatic tank present only from TAEevo031);
•
dryer filter;
•
liquid flow sight glass (in models without prismatic tank present only from TAEevo031);
•
lamination capillary (only for TAEevo015÷020);
•
refrigerant manometers (TAEevo031);
•
Schrader service valves;
Consult the enclosed drawings for additional information.
4 . 3
C o m p r e s s o r s
All the machines are equipped with piston or SCROLL hermetic compressors, which are distinguished for their high energy efficiency, low
vibrations and consequent silence in normal operation.
They are cooled by the aspirated gas, protected against overheating of the windings by an internal module that monitors their temperature and,
upstream, by magnetothermic circuit breakers. These components are housed in a closed, but easily accessible, compartment.
4 . 4
C o n d e n s e r
Condensation occurs through fin-pack coils consisting of copper tubes and collectors, aluminium fins and shoulders in galvanised sheet.
4 . 5
E v a p o r a t o r
The evaporator is a finned pack type; the water flows in contact with the finned surface and at a speed that guarantees low pressure drops, while
the refrigerant fluid flows inside the tubes.
A plate exchanger can be fitted as an alternative.
In the TAEevo models, the exchanger is protected against the formation of ice, caused by low evaporation temperatures, through an anti-freeze
function in the electronic controller. A probe monitors the temperature of the evaporator outlet water. If it is necessary to achieve a negative
ambient/water temperatures, a mixture of water and glycol must be used.
To drain the circuit, see Chapter 9.4 “Emptying the process water circuit” .
4 . 6
T a n k
The storage tank is cylindrical.
Alternatively a prismatic atmospheric tank can be supplied.
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 antifreeze alarm and the shut-off valves must be
reopened.
The bypass serves exclusively to allow an antifreeze 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 antifreeze alarm trip cycles in the foregoing conditions.
Summary of Contents for TAEevo015
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