Start-Up; Maintenance; Service Kit; Start-Up After A Long Time Of Inactivity - Grundfos MQ Montageanleitung

Fig. 7
Connect the mains supply cable of the pump to the
electricity supply. When the cable is connected, a red
and a green indicator light on the control panel will
be on, see fig. 8.
Fig. 8
* Does not apply to pump versions for Australia.

5.3 Start-up

Before start-up, the pump must be filled with 4.5 to
5 litres water to enable it to self-prime, see fig. 9. The
pump is self-priming with a maximum suction lift of
8 metres.
Fig. 9
H O
2
4.5 to 5 l
When the pump is started, it will start to self-prime.
When the pump has been primed, it will automati-
cally change over to normal operation. If the priming
has not been completed within 5 minutes, the pump
will stop automatically and attempt to restart after
30 minutes. It is possible to reset the pump manually,
see point 2 in the table in section 4.1 Control panel.

6. Maintenance

Under normal operating conditions, the pump is
maintenance-free. However, it is recommended to
keep the pump clean.
Do not remove the pressure tank from
the pump unless it has been vented
through the air escape valve.
Never touch the electronics unless the
pump has been switched off for at
least 5 minutes.
If there is any risk of frost damage, drain the pump
through the drain hole, see fig. 10. The pump must
be filled with liquid before it is started up again, see
fig. 9.
Fig. 10
*
6.1 Service kits
Service kits are available for the MQ pump. The
service kits consist of the following replaceable
parts:
• shaft seal,
• motor,
• electronic units,
• hydraulic components.

6.2 Start-up after a long time of inactivity

The end cover incorporates a plug which can be re-
moved by means of a suitable tool. It is then possible
to free the pump rotor if it has seized up as a result
of inactivity. If the pump has been drained, the pump
must be filled with liquid before start-up, see fig. 9.

7. Service

Note: If a pump has been used for a liquid which is
injurious to health or toxic, the pump will be classi-
fied as contaminated.
If GRUNDFOS is requested to service the pump,
GRUNDFOS must be contacted with details about
the pumped liquid, etc. before the pump is returned
for service. Otherwise GRUNDFOS can refuse to ac-
cept the pump for service.
Possible costs of returning the pump are paid by the
customer.
However, any application for service (no matter to
whom it may be made) must include details about
the pumped liquid if the pump has been used for liq-
uids which are injurious to health or toxic.
9