Mechanical Installation; Mounting The Product - Grundfos JP PS Notice D'installation Et De Fonctionnement

4.2 Mechanical installation

WARNING
Electric shock
Death or serious personal injury
‐
Switch off the power supply before you start any work
on the product. Make sure that the power supply
cannot be switched on accidentally.
CAUTION
Crushing of feet
Minor or moderate personal injury
‐
Wear safety shoes when handling the product.
CAUTION
Impurities in the water
Minor or moderate personal injury
‐
Before the pump is used for supplying drinking water,
flush the pump thoroughly with clean water.

4.2.1 Mounting the product

• Place the product in a horizontal position with a maximum
inclination angle of ± 5 °. The base plate must be facing
downwards.
• Fasten the product to a solid horizontal foundation with screws
through the holes in the base plate.
F
Foundation of JP PS pump
Pos.
F
G
6
4.2.2 Connecting the pipe system
1.
2.
G
3.
4.
[in (mm)]
1.85 (47)
5.
4.33 (110)
6.
Inlet pipe with gradual upward slope towards the pump
Install the product so that it is not stressed by the pipe
system.
Pipe dimensions:
• The diameter of the inlet pipe must be larger than 1
inch, if the inlet pipe is longer than 32.8 ft (10 m), or if
the suction lift exceeds 13.1 ft (4 m).
• If a hose is used as inlet pipe, it must be non-
collapsible.
We recommend that you install isolating valves on both
the inlet and outlet side of the pump.
JP PS installations require a pressure tank.
To ensure optimum operation and longer life of the pump, a
pressure tank with a properly set air charge is included in the
installation. See the tank manufacturer's instructions for proper
tank size selection and specific setting of the air charge. See
table below for general guidelines.
Pressure switch Tank air pre-charge
cut-on pressure (no water pressure)
[psi] [psi]
20 18
30 28
40 38
Seal the pipe fittings with thread sealing tape or similar.
Connect the pipes to the inlet and outlet port on the pump. Do
not let the pump support the pipes.
Use a pipe wrench or similar tool.
Fit a foot valve to the inlet pipe if the pump is installed above
the liquid level, for example, if you pump from a well, tank or
reservoir. We recommend using a foot valve with a strainer.
We recommend installing a filter on the inlet side to protect the
pump from sand, gravel or other debris if the pump is to be
used for pumping rainwater or well water.
Make sure that the inlet pipe has a gradual, slight upward slope
towards the pump to avoid air pockets, especially under
suction-lift conditions.