42 COMPACT, ROBUST, HIGH HYDRAULIC PERFORMANCE NOCCHI PRESSURE BOOSTER UNIT WITH TWO ELECTRIC PUMPS WITH PRESSURE SWITCH CONTROL EASY20/Multi EVO • Lifts and distributes water in domestic systems APPLICATIONS • Pressurization systems • Cleaning systems • Irrigation DESCRIPTION OF OPERATION The pumps are controlled by two pressure switches with adjustable calibration, through a power board fitted with an electronic card: - to sequentially start the pumps - to invert the start order - to protect against motion when dry - with timing feature (adjustable from 0 to 180") When the network pressure reaches the value triggering the closure of pressure switch no. 1, the first pump is started. If the pressure continues to fall, when the pressure reaches the value triggering the closure of the second pressure switch, the other pump starts. When the network pressure rises, the pressure switches open, causing the relative pump to stop. At the end of each cycle, the inverter automatically changes the pump starting order (one time pressure switch no. 1 is associated with pump no. 1; in the next cycle it will be associated with pump no. 2). USE DATA MULTIEVO Maximum flow (m 3 /h) 21 Maximum head (m.c.a.) 70 Maximum operating pressure 8 bar Power supply voltage 1 ~ 230 / 3~400 V Frequency 50 Hz Protection class control board IP55 Protection class electric pump IP55 Room temperature 40°C Number of pumps 2 IE3 MOTOR These are units for the automatic pressurization of water supply networks with single phase electrical power supply composed of: 2 electric pumps, power board, base, intake and outlet manifold, pressure switches, gauge and outlet retainer valve.
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42
COMPACT, ROBUST, HIGH HYDRAULIC PERFORMANCE
NOCCHIPRESSURE BOOSTER UNIT WITH TWO ELECTRIC PUMPS WITH PRESSURE SWITCH CONTROL
EASY20/Multi EVO
• Lifts and distributes water in domestic systems
APPLICATIONS
• Pressurization systems
• Cleaning systems
• Irrigation
DESCRIPTION OF OPERATIONThe pumps are controlled by two pressure switches with adjustable calibration, through a power board fitted with an electronic card: - to sequentially start the pumps - to invert the start order - to protect against motion when dry - with timing feature (adjustable from 0 to 180") When the network pressure reaches the value triggering the closure of pressure switch no. 1, the first pump is started. If the pressure continues to fall, when the
pressure reaches the value triggering the closure of the second pressure switch, the other pump starts. When the network pressure rises, the pressure switches open, causing the relative pump to stop. At the end of each cycle, the inverter automatically changes the pump starting order (one time pressure switch no. 1 is associated with pump no. 1; in the next cycle it will be associated with pump no. 2).
USE DATA MULTIEVO
Maximum flow (m3/h) 21
Maximum head (m.c.a.) 70
Maximum operating pressure 8 bar
Power supply voltage 1 ~ 230 / 3~400 V
Frequency 50 Hz
Protection class control board IP55
Protection class electric pump IP55
Room temperature 40°C
Number of pumps 2
IE3MOTOR
These are units for the automatic pressurization of water supply networks with single phase electrical power supply composed of: 2 electric pumps, power board, base, intake and outlet manifold, pressure switches, gauge and outlet retainer valve.
43
NOCCHIPRESSURE BOOSTER UNIT WITH TWO ELECTRIC PUMPS WITH PRESSURE SWITCH CONTROL
EASY20/Multi EVO
DESIGN FEATURES
BASE
1. Base in zinc-coated sheet metal
INTAKE MANIFOLD
8. no. 2 brass ball valves
9. no. 1 water intake sleeve
10. no. 1 manifold in zinc-coated steel
OUTLET MANIFOLD
2. no. 2 brass ball valves
3. no. 2 retainer valves
4. no. 1 gauge
5. no. 2 pressure switches
6. no. 1 manifold in zinc-coated steel
7. no. 1 power board
3
9
5
101
7
8
2
6
4
44
NOCCHIPRESSURE BOOSTER UNIT WITH TWO ELECTRIC PUMPS WITH PRESSURE SWITCH CONTROL
EASY20/Multi EVO 3
HyDRAULIC PERFORMANCE
Q [ l/min ]
Q [ m³/h ]
0,0 20,0 40,0 60,0 80,0 100,0 120,0 140,0
0,0 1,2 2,4 3,6 4,8 6,0 7,2 8,4
H[ m ]
0
10
20
30
40
50
60
70
80
[ % ]
10
20
30
40
50
60
pη
3/30
3/40
3/50
3/60
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NOCCHIPRESSURE BOOSTER UNIT WITH TWO ELECTRIC PUMPS WITH PRESSURE SWITCH CONTROL