Start-Up; Venting The Pump - Grundfos UPED 80-120 FZ Montageanleitung Und Bedienungsanleitung

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Note:
• All cables used must be heat-resistant up to
at least +85 °C.
• All cables used must be installed in accordance
with EN 60204-1.
Warning
Wires connected to
• outputs 7 and 8,
• inputs 1 to 6,
• supply terminals and
• differential-pressure and
temperature sensor
must be separated from each other and
from the supply by reinforced
insulation.
All wires connected to a terminal block
must be tied up at the terminals.
Concerning demands on signal wires and signal
transmitters, see section 12. Technical data.
Control panel retaining screws
Terminal for fan
High-voltage indicator
Terminal for screened motor cable
Fan

6. Start-up

Do not start the pump until the system has been filled
with liquid and vented. Furthermore, the required
minimum inlet pressure must be available at the
pump inlet. See section 12. Technical data.
The system cannot be vented through
Note
the pump.

6.1 Venting the pump

Vent the pump before start-up. See fig. 7.
Warning
When the vent screw is slackened,
scalding hot liquid under high pressure
may escape. Care must be taken to
ensure that the escaping liquid does
not cause personal injury or damage to
other components.
Vent screw
Venting the pump
Fig. 7
The pump may be noisy, when first switched on,
due to air remaining in the pump. This noise should
cease after a few minutes running.
After start-up, set the desired operating mode and
possibly pump head.
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