Espa TECNOPLUS 25 Manuel D'instructions page 8

Instruction Manual
4.2. Suction pipe assembly
The suction pipe must have the same diameter as the pump suction pipe, or larger if the line is more than 7 meters
long, with a constant upward slope of 2% to avoid the formation of air pockets.
If the pump is installed in suction pipe mode, it must be placed as close as possible to the water level, so as to
reduce the suction inlet distance and avoid pressure losses. A negative geometrical suction height of more than 2 m
is not recommended. It is advisable to install a check valve at the base of the suction.
The suction pipe must be submerged at least 30 cm below the dynamic water level.
4.3. Discharge pipe assembly
It is advisable to use pipes with at least the same diameter as the discharge outlet to reduce pressure losses in
long, winding segments of the pipes.
The pipes must never rest their weight on the pump. It is forbidden to install a check valve on the discharge.
Ensure that there are no water leaks in the installation.
Use only Teflon tape to guarantee the tightness of the discharge outlet. We recommend installing an accumulator
of at least 5 litres to make up for small water losses in the installation, avoiding constantly starting and stopping the
pump.
4.4. Electrical connection
CONNECTING THE PUMP TO THE MAINS
The electrical installation must have a multiple separation system with contact openings ≥ 3 mm. The system
protection will be based on an ground leakage switch (IΔn = 30 mA).
Connect the plug of the pump directly to a home power outlet, suitably protected according to the regulations in
force in each country. Perform all electrical connections according to Regulation IEC-60364 (electrical installation
in buildings) or the regulations in force in the destination country.
4.5. Verifications prior to initial start-up
WARNING: Make sure the mains frequency and voltage match the indications of the name plate.
Before starting the pump:
Make sure the pump shaft can turn freely.
Completely fill the pump housing with water through the priming plug. If you have installed a foot valve, fill the
suction pipe.
Check that none of the gaskets or connections have any leaks.
NEVER RUN THE PUMP DRY.
5. START-UP
5.1. Start-up and operation
Open all the gate valves on installation, for suction and for discharge.
Connect the electric power supply. The voltage indicator will light up (LINE).
The unit then starts automatically. While the pump is working, the running indicator will be lit (RUN).
During this operation, keep a water outlet faucet open to purge any air existing in the installation. Once the
installation has been purged, close the faucet; the unit will stop after 10 seconds. Only the voltage indicator (LINE)
will remain lit.
If the pump is not properly primed or no water supply is available at start-up, the FAULT LED indicator will light up
after 10 seconds. To complete pump priming, press the (+) and (-) buttons simultaneously; this will reinitiate the
circuit and the 10-second timer.
The pump continues working with a water supply of over 2 l/minute; below this level, the control makes the RUN
LED blink intermittently to indicate that water flow is below minimum and the pump stops after about 10 seconds.
If the motor does not start or does not pump water, try to discover the cause of the irregularity in the troubleshooting
section provided later in this manual.
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