Self-priming swimming pool pumps
with built-in strainer
MPC
Compact Pool
OPERATING INSTRUCTIONS
1. Operating conditions
Standard construction
- For water circulation in swimming pool filtration
systems.
- For clean or slightly dirty water with solids in
suspension, with a maximum temperature of
60 °C.
- Maximum permissible hydrostatic pressure and
pump discharge pressure: 2.5 bar.
- Maximum ambient temperature: 40 °C.
- Maximum starts/hour: 10 at regular intervals.
Sound pressure: < 70 dB (A). MPC7: 72 dB (A).
To isolate the motor from pumped water, the
MPC
Compact Pool
pumps are made with high quality
plastic materials. Necessary precaution during
installation along with use in accordance with
the limits specified will ensure trouble-free
operation.
2. Installation
The
MPC Compact Pool
pumps must be
installed in well ventilated locations protected
from the weather, with the rotor axis horizontal
and feet downwards.
Place the pump as close as practicable to the
suction source.
To reduce the risk of electric shock
install the pump at least 3 m from the
inside walls of a swimming pool. For use
as a portable pump in outdoor locations
provide suitable protection and mount the pump
on an insulating base of at least 100 mm height.
Follow
section 4
.
Provide space around the unit for
motor
ventilation
, easier inspection, removal of the
strainer basket, filling and draining the pump and
checking (with a screwdriver) for free rotation of the
shaft (
fig. 1
). With three-phase motors a sight
check of the direction of shaft rotation will be
required.
3. Pipes
Provide a diameter assuring a liquid flow not greater
than 1.5 m/s for suction and 3 m/s for delivery.
The pipe diameters must never be smaller than
the pump connection ports.
ATTENTION:
ensure the inside of pipes are
clean and unobstructed before connection.
A
concentrated sand content
with particles
larger than the radial clearance between the
impeller and the stainless steel wear-ring (about
1 mm) can cause early wear damage and a
reduction of the pump performance of about 10%.
For a hydrostatic pressure test of the piping with
a pressure higher than 2.5 bar isolate the pump
from the rest of the system (close inlet and outlet
valves before and after the pump).
3.1. Connecting the pipes
Use pipes or fittings in plastic material.
For connection to the threaded ports of the pump
casing use a plastic pipe thread sealant (for
instance: Loctite 5331).
Teflon tape not recommended. Do not use hemp.
ATTENTION: avoid excessive tightening of
pipes or fittings in threaded ports.
Tighten the pipes or fittings only to the degree
required to ensure a tight seal.
Excessive torque may cause damage to the
pump.
To join metal piping, first connect a transition
union with a plastic tailpiece to the threaded
port of the pump casing.
Coupling dissimilar
materials may cause corrosion and cracks
due to non-uniform expansion and contraction
in thermal cycling applications.
Secure all pipes to supports and connect them
so that they do not transmit stress, strain or
vibration to the pump. The pump must not be
subject to the weight or thermal expansion of
the piping.
Strain from the piping may damage or warp
the pump casing
and cause leakage.
Fig. 1
Minimum access for servicing (mm)
Removing
strainer
Dismantling motor
Checking
shaft
rotation
Draining
Motor ventilation
Filling
8
