Grundfos MQ Serie Notice D'installation Et De Fonctionnement page 9

8.3 Space requirement
For inspection and service, allow a minimum
clearance of 6" behind the pump.
Fig. 5
Minimum clearance behind the pump
Being self-cooling, the pump requires no space or
ventilation at the sides.
Ensure that the maximum ambient
temperatures do not exceed the values
Note
stated in section
conditions.
8.4 Pipework
Never use unnecessary force when
Note
connecting the pipes.
The pump is supplied with 1" NPT screwed
connections. Fit the connections in the suction and
discharge ports. See fig. 6. The pump discharge port
is flexible, ± 5 °, to facilitate the fitting.
Fig. 6
Fitting of screwed connections in suction
and discharge ports
6"
7. Operating
Carefully screw the discharge connection into the
discharge port, using a spanner or similar tool.
Hold the discharge connection, and tighten the pump
discharge union nut with your hand. See fig. 7.
Fig. 7
Correct: Tighten the discharge union nut
with your hand
Fig. 8 Wrong: Do not use a tool to tighten the
discharge union nut
8.4.1 Suction pipes connected to a well
If the pump draws water from a well, we recommend
to fit a foot valve to the end of the suction pipe.
See fig. 9.
Foot valve
Fig. 9
Suction pipes connected to a well
9