Fig.3
4.4.1- Installation
- Install the pool circulating pump on a horizontal and flat surface.
- Glue PVC suction and discharge pipes to pump union connections.
- Dimensions for installation and connections are given in Table 2.2
- Measured from suction inlet connection (Fig.3), the pump can be mounted up to 5 meters below
pool water level and up to 2 meters above pool water level,
- The most suitable mounting level is below the pool water level. The pump then operates under
flooded suction (without suction lift).
- On principle suction lines should be as short as possible.
- If it is necessary to mount the pump above pool water level, the suction pipe (from pool to the
pump) should preferably be run full-length horizontally below water level and only rise directly
at the pump. The suction line will then, on shut down of filter pump, only slightly be emptied.
- If the sand filter is placed above water level and with an additionally long suction run, the
circulating pump should preferably be mounted separate from the filter close to the pool below water
level.
- When operating with a suction lift, light-weight but positively sealing non-return valve should be
fitted at the lowest point of the suction line. They will assist in maintaining the water level in the
suction line during standstill of the filter plant.
- These check valves must, for the ease of cleaning, be easily accessible and removable.
- Total lengths of the circulating pipe work must not exceed 30 metres.
4.4.2- Electrical wiring
- As an effective protection against disastrous effects of earth fault currents it is required to
install an earth fault circuit interrupter (Fl-switch) for the total electrical circuitry of the pool
system. Trip current 30mA.
- An all-pole isolation switch (min. contact gap 3mm) must be installed in the power supply cable.
As a protection from excessively high shock voltage it is required to connect all metallic parts at pool
bottom and walls with a potential compensation wiring. This copper wire, minimum size 10 mm2,
should be connected to a specially set and earthed potential compensating bus bar, which is to be
separately connected to the earth wire of the power supply.
- The earthing resistance of the potential compensating wire must be less than 800 ohms in order to
restrict the shock voltage to less than 24V in case of a fault.
- A switchbox must be provided on site by others to ensure the thermal overload contacts (WSK) of
the pump motor to be effective.
-Electrical work to be carried out by qualified and licensed electricians in strict conformity to
