NECTA SPA TECHNICAL MANUAL
“ Snakky “
Manual
Snakky
13
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6 – COOLING UNIT AND INTERNAL VENTILATION
The internal temperature control is by means of an NTC type electronic probe fitted with an internal 2267-ohm
resistance (± 7 ohm) at a temperature of 3° C.
As the internal temperature decreases the resistance is increased progressively as indicated in the following table.
This variation allows the software to control the internal temperature with extreme accuracy.
Ref. box int.
temperature
Value in ohm
Allowed tolerance
30° 733 +/-7
ohm
15° 1348
,,
3° 2267
,,
0° 2612
,,
The cooling unit is controlled by the relay
card located inside the power supply box
and powered at the grid voltage (SOR
CARD).
When the machine is started, the software
reads the value (in Ohm) from the NTC
probe and, according to the temperature
setting, sends a signal to the relay card
that activates or deactivates the cooling
unit operation.
The cooling unit is very compact and of
the slide-in type; in any case it is designed
to be extracted easily and quickly.
To access the cooling unit, the last tray
must be extracted, then the anti-theft
grille and the dispensing compartment
must be removed.
At this point the complete cooling unit can
be extracted.
List of components:
1 - COMPRESSOR
2 - CONDENSER
3 - CONDENSER FAN
4 - EVAPORATOR
5 - EVAPORATOR FAN
6 - PROBE
7 - CABLES
The software includes the option of setting
time bands for switching on or for safety
temperatures: see details in the
programming manual.
NB. A cooling unit is a real SLIDE-IN type
when it is designed as a complete single
piece unit (e.g. the unit installed on the
StarFood); for the Snakky it is more of a
partial slide-in type, as although it can be
removed completely it is not designed as a
single piece functional unit.
Exploded view of cooling unit
condenser
compressor
Electric fan
probe
evaporator
evaporator
fan
cables
