Grundfos DDA 7.5-16 User Manual

English (GB)
18
5.2 Deaerating the pump
1. Open deaeration valve by approximately half a
turn.
2. Press and hold down the [100%] key (deaeration
key) until liquid flows continuously without any
bubbles from the deaeration hose.
3. Close deaeration valve.
5.3 Calibrating the pump
The pump is calibrated in the factory for media with a
viscosity similar to water at maximum pump
backpressure (see section 3.1 Technical data).
If the pump is operated with a backpressure that
deviates or if dosing a medium whose viscosity
deviates, the pump must be calibrated.
For pumps with FCM control variant, it is not
necessary to calibrate the pump if there is deviating
or fluctuating backpressure as long as the
"AutoFlowAdapt" function has been enabled (see
section 6.10 AutoFlowAdapt).
Requirements
• The hydraulics and electrics of the pump are
connected (see section 4. Assembly and
installation).
• The pump is integrated into the dosing process
under operating conditions.
• The dosing head and suction hose are filled with
dosing medium.
• The pump has been deaerated.
Warning
The deaeration hose must be
connected correctly and inserted into a
suitable tank!
Note
Press the [100%] key and
simultaneously turn the click wheel
clockwise to increase the duration of
the process to up to 300 seconds.
After setting the seconds, do not press
the key any longer.

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