Startup; General Notes; Check Before Commissioning; Start And Deaerate The Pump - Grundfos DDE series Montage- Und Betriebsanleitung

5. Startup

5.1 General notes

Warning
Suction and discharge hoses must be
connected correctly!
The deaeration hose must be connected
correctly and inserted into a suitable tank!
Tighten the dosing head screws with a
torque wrench once before commissioning
Caution
and again after 2-5 operating hours at 4
Nm.

5.2 Check before commissioning

• Check that the rated voltage indicated on the
nameplate complies with the local conditions.
• Check that all connections are assembled
correctly. Tighten connections, if necessary.
• Check that the dosing head screws are tightened
with the indicated torque (4 Nm). Tighten dosing
head screws, if necessary.
• Check that all electrical cables and plugs are
connected correctly.

5.3 Start and deaerate the pump

1. Connect mains supply
(see 4.3 Electrical connection).
2. Open the deaeration valve by approximately half
a turn.
3. DDE-PR/P control variant: Press the [100%] key
and hold it down, until liquid flows out of the
deaeration hose continuously and without any
bubbles.
4. DDE-B control variant: Turn the capacity
adjustment knob to 100 % and wait, until liquid
flows out of the deaeration hose continuously
and without any bubbles. Then set the capacity
adjustment knob back to 0 %.
5. Close the deaeration valve.
The pump is deaerated.
16

6. Operation

6.1 Operating elements

Logarithmic scale
Capacity adjustment knob
3
4 5
2
6
1.5
1 10
8
0.8
0.6
0.5
0.4
0.3
0.2
0.15
0% 100%
Mechanical lock
Fig. 9 Operating elements
* Applies to DDE-PR/P control variant.
Capacity adjustment knob
The capacity adjustment knob is used to set the
capacity in percent of the maximum dosing flow of
the pump. Due to the logarithmical increase of the
percent values, even small dosing capacities can be
set accurately.
Mechanical lock
The mechanical lock protects the set dosing capacity
against unauthorised manipulation. For locking,
tighten the screw until the adjustment knob cannot
be turned anymore.
Keys and LEDs
The DDE-B control variant is only
Note
equipped with a status LED.
When pressing and holding down the [100%] key, the
pump doses at 100 % for a certain time.
The [100%] key can be used e.g. for deaeration.
The [Operation mode] key is used to change
between the "Manual" and "Pulse" mode
(see section 6.2.3 Change operation
According to the selected operation mode, the
respective status LED is active
("Pulse" = LED above key; "Manual" = LED below
key).
Status LED
"Pulse"*
15
20 [Operation
mode] key*
30
40
50
60
100%
80
Status LED
"Manual"
[100%] key*
modes).