Starting Point; Maintenance - PYD Electrobombas SUB Serie Manual De Instalación Y Mantenimiento

INSTALLATION AND MAINTENANCE MANUAL
SUBMERSIBLE PUMPS
3.2. Three-phase pumps
Install an overload protection device in the control box in accordance with the current rating on the
nameplate.

5. STARTING POINT

With a three-phase power supply make sure that the direction of rotation is correct.
To do this, with the gate valve in any open position, check the pressure (with the pressure gauge)
or flow rate (sight check) after start-up. Switch off the power, reverse the two-phase connections
on the control panel, restart and check the pressure or flow capacity again.
The correct direction of rotation will give a considerably sharper and easily distinguishable pressu-
re and delivery capacity.
Make sure that the pump is operating within its rated performance range and that the current draw
indicated on the nameplate is not exceeded.
Otherwise, adjust the supply gate valve or adjust the pressure switches if fitted.
CAUTION: Never allow the pump to run for more than five minutes with a closed gate valve.
CAUTION: Never run the pump dry, even for a short test period. Never start the pump before it
has been submerged to a depth of at least 100 mm.
Float switch construction:
The float switch, connected directly to the pump, controls start and stop.
Check that the float switch is free of any obstructions.
If necessary, adjust the float cable.
Excessive cable length may cause the motor to overheat and the pump to run dry.
Construction without float switch:
If there is no air vent valve, the minimum immersion depth at first start-up must be 300 mm. An air
vent valve must be used on systems with a submerged outlet.
Do not start the pump with a fully closed shut-off valve.
Never remove the pump from the water while the pump is running.

6. MAINTENANCE

Under normal operating conditions, the pump requires no maintenance.
If freezing can be expected while the pump is idle and not submerged to a safe depth, remove the
pump from the water and leave it in a dry place.
CAUTION: If the pump is temporarily used with dirty liquids or water containing chloride, flush
the pump briefly with clean water immediately after use to remove any deposits.
If the pump has not been used for a long time and will not start or give water (but the electrical
connections are in order), the pump should be removed from the water and checked to see if it is
choked by any foreign matter or blocked by sediment, deposits or any other cause.
www.proindecsa.com / proindecsa@proindecsa.com
16