Grundfos DDA 7.5-16 User Manual

English (GB)
44
9. Disposal
This product or parts of it must be disposed
of in an environmentally sound way.
Use appropriate waste collection services.
If this is not possible, contact the nearest Grundfos
company or service workshop.
Subject to alterations.
Irregular dosing
Valves leaking or blocked
Tighten up valves, replace valves if necessary
(see section 7.4 Perform service).
Backpressure fluctuations
Keep backpressure constant.
Activate "AutoFlowAdapt" (only DDA-FCM).
Liquid escaping from
the drain opening on
the flange
Faulty diaphragm
Immediately separate the pump from the power
supply!
Observe section 7. Service and especially section
7.6 Diaphragm breakage.
Liquid escaping
Dosing head screws not
tightened
Tighten up screws (see section 4.2 Hydraulic
connection).
Valves not tightened
Tighten up valves/union nuts (see section
4.2 Hydraulic connection).
Pump not sucking in
Suction lift too high
Reduce suction lift; if necessary, provide positive
inlet pressure.
Backpressure too high Open the deaeration valve.
Soiled valves
Flush system, replace valves if necessary (see
section 7.4 Perform service).
Fault Possible cause Possible remedy

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