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Idiomas disponibles
The units from the WSA series are
water chillers water condensed for re-
sidential and industrial use. The machi-
ne is designed for the management of
both hydraulic circuits: (evaporator and
condenser); therefore, it can be used
not only as a water chiller but also to
produce hot water.
The commutation between "COOL
- HEAT" is obtained by managing the
hydraulic circuit.
The new WSA series is characterised
by the use of refrigerant R134a, which
allows reaching performances signifi-
cantly superior to equivalent products
that operate with R407C.
This is also the result of a thorough stu-
4.3
CONFIGURATOR
1,2,3
4,5,6,7
8
WSA 2802
°
Field
Code
1, 2 ,3
WSA
4, 5, 6, 7 Size
0701 - 0801 - 0901 - 1101 - 1402 - 1602 - 1802
- 2002 - 2202 - 2502 - 2802
8
Field of use
°
Standard with processed water above 4°C
Y
Low temperatures (antil -6°C)
(1)
X
With electronic valve
9
Model
°
Standard
10
Heat recoverers
°
Without recoverers
D
Desuperheater
T
Total recovery
11
Version
°
Standard
L
Standard in Silenced version
12
Heat exchangers
°
Standard according to PED
(2)
E
condenserless (without condenser)
14
Power supply
°
3 ~ 400V - 50 Hz with fuses
2
3 ~ 230V - 50 Hz with fuses
4
3 ~ 230V - 50 Hz with thermomagnetic switches
5
3 ~ 500V - 50 Hz with fuses
8
3 ~ 400V - 50 Hz with thermomagnetic switches
9
3 ~ 500V - 50 Hz with thermomagnetic switches
6
UNIT DESCRIPTION
4
dy and dimensioning of all the internal
components in order to make the most
of the refrigerant gas characteristics.
The whole series includes models with
one or two twin-screw compressors
and are fitted with star - delta start to
reduce the starting current.
All the units are tested, (it will be neces-
sary only to make hydraulic and electri-
cal connections on site).
All units have a protection class of IP 24.
4. 1 AVAILABLE MODELS
- "HEAT PUMP (H)"
- "CONDENSERLESS (E)"
Condenserless units are sold
with the single maintenance
charge
9
10
11
12
13
°
D
L
°
°
CAUTION
Before each start-up operation of the
unit (or at the end of each extended pau-
se period) it is extremely important to
preheat the oil in the compressor casing,
by means of the suitable electric heaters,
during at least 8 hours. The casing hea-
ting element is automatically powered
when the unit pauses so that the unit is
kept powered up.
4.2
AVAILABLE SET-UPS
With the aid of the configurator, it is pos-
sible to set up and then order the chiller
that best suits the needs of users or
whoever stands in for them.
(1)
ELECTRONIC VALVE
"ELECTRONIC EXPANSION VALVES" are cha-
racterised by a high regulation capacity that
allows compressors to always work in the
best possible operating conditions (compati-
ble with the outdoor ambient conditions).
In winter it is therefore possible to work with
very low condensation pressure, improving the
efficiency of compressors and reducing power
consumption.
With the electronic valve in our chillers, tem-
perature adjustment is more efficient, as it is
possible to obtain lower working temperatures
making the best use of the evaporator surface.
Besides, the system does not require future
settings or adjustments, since the electronic
valve operates continuously its control function
according to the parameters obtained from
the transducers, keeping optimum overheating
values. Apart from better pressure conditions,
there are better temperature conditions for
the compressors, keeping discharge tempera-
tures lower than the ones obtained when using
the standard thermostatic valve. This results
in a longer service life for the compressor and
a reduction in the number of failures.
To summarise, the advantages of using the
electronic valve are:
- Energy saving in the system consumption
levels
- Better working conditions for compressors
(lower pressure and lower discharge tem-
perature), which results in less failures and
a reduction in the maintenance costs.
- Continuity of performance throughout time
- Less deterioration of the compressor me-
chanical parts and of the lubricating oil
- Repeatability of the adjustment and energy
consumption results throughout time.
All this in acknowledgement of AERMEC com-
mitment to and respect for the problems rela-
ted to energy saving and conscious and socially
responsible use of the available resources.
(2) NOTE
CONDENSERLESS UNITS ARE SOLD
WITH THE SINGLE MAINTENANCE
CHARGE
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