Unicum NERO TOUCH - Flot Chamber, Boiler Pump, Boiler and Steam Boiler

User manual for NERO TOUCH, NERO TOUCH INSTANT
page 33
Version 1.1 / December 2017
ТМ
5.8 Flot chamber, boiler pump, boiler and steam boiler
Fig.5.9
1. Pin switch of the water level sensor
2. Float
3. Water inlet connector
4. Water outlet to the boiler
Boiler pump
Fig.5.10
1
2
3
4
The boiler’s electromagnetic valves
During drink preparation, the hot water enters through one of the four electromagnetic valves, located
ontopoftheboiler(seeg.5.11),accordingtotheselectionthehotwaterows:
1. into espresso group, one of the two mixers, directly into drink disposal nozzle (not-INSTANT).
2. into one of the three mixers, directly to the drink disposal nozzle (INSTANT).
It is strictly prohibited to use water, which does not conform to the given standards of
hardness and calcium content (see the vending machine’s technical features). This can
cause rapid deterioration and failure of the machine’s electromagnetic valves!
The water for the preparation of drinks is supplied by the following group of
devices:boiler,whichheatsthewater;boilerpump,whichpumpsthewater
into the hydraulic circuit; oat chamber, which helps avoid air bubbles and
blocks from entering the hydraulic system.
Flot chamber
Theoatchamber(seeg.5.9) retains theminimumrequiredquantityof
water, which is necessary to keep the hydraulic system alive and to ensure the
dispensing of drinks, in case the water supply runs dry.
 Equipped with a sensor it determines the stateof thechamber: lledor
empty. During the functioning of the internal pump, the water level gradually
fallsinsidetheoatchamber until reaching the set level, wherethesensor
reads as if the chamber is empty. At this moment the water from external
source (the valve is opened) or internal source (the autonomous mode pump
turnsON)startslling theoatchamber,untilthe waterlevelsensordeter-
mines that the chamber was full. This also forms a permanent water lock. In
case of shut down of external water supply or depletion of water in the internal
source,theoatchamberwillnotbelledwithinthesettimeinterval,which
will cause the vending machine to be blocked.