Operating manual
AQUA S.p.A.
ENGLISH
Page 12
GENERAL INDICATIONS:
For proper pump operation, it is very important that the valve axis will be perfectly vertical.
Be sure to protect the pump from plant pipes leakages and corrosion. The pump is able to keep and handle the chemical in the
pump-head only! Avoid to install pipings or accessories directly above the pump. Avoid to install the pump in corrosive or stagnant
atmosphere, because the chemical fog may irreparably damage the pump!
In case of outside installation please consider an adequate protection by direct weather action (rain, sun, wind, dust and humidity)
which could significantly reduce machine life. Consider moreover to use a roofing and/or sliding panels that will prominently improve
pump’s efficiency and safety during its whole working life.
Consider sufficient space all around the pump, in order to allow machine inspection and maintenance
CONNECTION TO PLANT PIPES
Do not install the pump directly to cement base. Use a metallic base and ensure that it result stable and levelled to avoid further vibrations.
Pipes must be supported independently, their weight must not lie on the pump in any way, because that will create tensions on the
pump, ruptures and product leaking. Do not tighten too much the piping connection to the pump-head ones, above all in case of pump-
head in plastic materials, in order to avoid ruptures or deformations.
To make the dismantling easier, draining connections must be installed in
the discharge piping, near the liquid end.
An internal plant washing is required before connecting the pump to the pipings, with special attention to suction pipe and relevant
supply tank. This procedure will eliminate any solid residues which, if lead into the pump-head, can irreparably damage the pump.
ELECTRIC MOT OR CONNECTI ON
For ATEX executions refer only to ATEX specific manuals in attachment to the supply!!!
Electric motor usually supplied with PDM pumps is a three-phase motor, at 230-400V tension. Depending by the version, its power can be 0,18 or
0,37 kW at 50/60 Hz. Before connecting it to the power supply, Customer must check that the plant tension complies to the motor plate, to avoid
damages on electric parts. It is also recommended:
•
To install always in agreement with the last safety norms;
•
To install all necessary motor protection devices (for example a thermal protected switch)
NOTE: Fuses are not intended a sufficient
motor protection!
•
To guarantee a sufficient space to allow motor cooling, by leaving at least 30 cm from walls and other objects.
•
Not to install standard motors into extreme hot environments (ambient temperature >40°C) or at altitudes above 1000m a.s.l. In this cases
an over dimensioned motor is required to balance the loss of performance caused by working environment.
•
To check cable gland dimensions and tightening. They have to be adequate to entering cables dimensions in order to preserve the
electric motor box by external agents and guarantee the protection.
•
To check motor rotation direction during first start. It should turn in COUNTER CLOCKWISE direction if observed by the top (fan side).
ATTENTION: Wrong cable glands or an insufficient tightening may damage the terminal box, the electric cables and
jeopardize motor protection. In any case, ALWAYS connect the ground wire inside the motor box!
