Grundfos DDA 7.5-16 User Manual

English (GB)
36
Timer Cycle (Relay 2)
For the "Relay 2 > Timer Cycle" function, set the
following parameters:
• On (t
1
)
• Start delay (t
2
)
• Cycle time (t
3
)
Fig. 38 Diagram
Timer Week (Relay 2)
This function saves up to 16 relay on-times for a
week. The following settings can be made for each
relay switching operation in the "Relay 2 > Timer
Week" menu:
• Procedure (No.)
• On time (duration)
• Start time
• Weekdays.
6.16.2 External stop
The pump can be stopped via an external
pulse, e.g. from a control room. When activating the
external stop pulse, the pump switches from the
operating state "Running" into the operating state
"Standby". The corresponding symbol appears in the
"Signal/error display" area of the display.
The contact type is factory-set to normally open
contact (NO). In the "Setup > Inputs/Outputs >
External stop" menu, the setting can be changed to
normally closed contact (NC).
6.16.3 Empty and Low level signals
In order to monitor the filling level in the
tank, a dual-level sensor can be connected to the
pump. The pump responds to the signals as follows:
Both signal inputs are allocated to the normally open
contact (NO) in the factory. They can be re-allocated
in the "Setup > Inputs/Outputs" menu to normally
closed contact (NC).
6.17 Basic settings
All settings can be reset to the settings default upon
delivery in the "Setup > Basic settings" menu.
Selecting "Save customer settings" saves the current
configuration to the memory. This can then be
activated using "Load customer settings".
The memory always contains the previously saved
configuration. Older memory data is overwritten.
TM04 1124 2110
Caution
Frequent disengagement from the
mains voltage, e.g. via a relay, can
result in damage to the pump
electronics and in the breakdown of the
pump. The dosing accuracy is also
reduced as a result of internal start
procedures.
Do not control the pump via the mains
voltage for dosing purposes!
Only use the "
External stop " function to
start and stop the pump!
t
2
t
3
t
1
t
1
Sensor signal Pump status
Low level
• Display is yellow
• Flashes
• Pump continues running
Empty
• Display is red
• Flashes
• Pump stops
Caution
When the tank is filled up again, the
pump restarts automatically!

Grundfos DDA 7.5-16 Specifications

General

Max Flow Rate	7.5 l/h
Max Pressure	16 bar
Protection Class	IP65
Operating Temperature	0°C to +45°C
Analogue Control	4-20 mA
Pulse Control	Yes
Level Control	Yes
Power Supply	100-240 V, 50/60 Hz
Material	Stainless Steel