Grundfos CU 301 Instrucciones De Instalación Y Funcionamiento página 8

CU 301
1
2
3
8
7
Fig. 6
Pos. Description
1 Supply to the electronics
2 Signal coils
3 Capacitor
Electronics for the control of the
4
communication
5 On/off button
6 Sensor signal
7 Power supply
8 Communication signals
8
5
4
Grundfos GO
Remote
6
When does the pump start
The pump starts as a consequence of the following:
• a high flow
• a low pressure
• a combination of both.
To ensure that the pump starts when water is
consumed, a flow detection is required. The flow is
detected via pressure changes in the system. When
water is consumed, the pressure drops accordingly
depending on the size of the diaphragm tank and the
water flow:
• at a low flow, the pressure drops slowly.
• at a high flow, the pressure drops quickly.
See fig. 7.
Pressure
Low flow
Fig. 7
When the pressure drops 0.1 bar/s or faster, the
pump starts immediately.
If a diaphragm tank of 8 litres is used, the pump
starts at a flow rate of approximately 0.18 m
larger tank is used, the flow must be higher before
the pump starts.
Consumption up to 0.18 m
The pump starts when the pressure drops to 0.5 bar
below the pressure setting.
The pump runs until the pressure is 0.5 bar above
the pressure set.
Time
3
/h. If a
3
/h