Start-Up; Maintenance; Service Kits; Start-Up After A Long Time Of Inactivity - Grundfos MQ Serie Notice D'installation Et D'entretien

6.4 Start-up

Before start-up, the pump must be filled with 1.2 to
1.5 gallons of water to enable it to self-prime, see fig.
10. The pump is self-priming with a maximum suction
lift of 25 ft.
Fig. 10
When the pump is started, it will begin 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.

7. 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 and slacken the union nut on
the discharge pipe, see fig. 11. The pump must be
filled with liquid before it is started up again, see
fig. 10.
Fig. 11

7.1 Service kits

Service kits are available for the MQ pump. The ser-
vice kits consist of the following replaceable parts:
• shaft seal,
• motor,
• electronic units,
• hydraulic components.

7.2 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, it must be
filled with liquid before start-up, see fig. 10.

8. Service

Note: If a pump has been used for a liquid which is in-
jurious to health or toxic, the pump will be classified
as contaminated.
If Grundfos is requested to service the pump, Grund-
fos must be contacted with details about the pumped
liquid, etc. before the pump is returned for service.
Otherwise Grundfos can refuse to accept 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 liquids
which are injurious to health or toxic.

9. Disposal

Disposal of this product must be carried out according
to the following guidelines:
1. Use the local public or private waste collection ser-
vice.
2. In case such waste collection service does not exist
or cannot handle the materials used in the prod-
uct, please deliver the product or any hazardous
materials from it to your nearest Grundfos com-
pany or service workshop.
11