Electrical Connection; Start-Up And Operation; First Starting - FLOWTECH flowpac compact 311S Operation And Maintenance Manual

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The pump can be held in a suspended position by the metal delivery pipe. Tighten the threaded pipe joints
firmly to avoid loosening during operation.
Position the pump at a distance of at least 0.5m from the bottom of a well so that sand is not lifted.
A safety rope or chain of non-perishable material should always be used to secure a suspended pump.
When a plastic or flexible delivery pipe is used, the safety rope or chain should be utilized for lowering,
securing and raising the pump.
Never use the electric power cable to suspend the pump.
Attach the power supply cable to the delivery pipe and to the safety rope with cable clamps at intervals of
about 3m. The power cable should not be taut: allow for a certain degree of slackness between the clamps
to avoid the risk of strain caused by expansion of the pipe during operation.

Electrical connection

Electrical connection must be carried out only by a qualified electrician in accordance with local regulations.
Follow all safety standards.
The unit must be always earthed, also with a non-metallic delivery pipework.
ATTENTION: in the case of water containing chloride (or salt water), the earthing (grounding)
conductor is useful also to reduce the risk of galvanic corrosion due to electrolytic action, especially
with non-metallic delivery pipe and safety rope.
Make sure the frequency and mains voltage correspond with the name plate data.
For use in swimming pools (not when people are in the pool), garden ponds and similar places, a residual
current device with IΔN not exceeding 30 mA must be installed in the supply circuit. Install a device for
disconnection from the mains (switch) with a contact separation of at least 3mm on all poles. When the
water level is not under direct visible control, install a float switch or electrodes to protect the pump against
dry running and to set the water levels to stop and automatically start the pump.
The pumps are supplied with power cable type H07-RN8-F type with section of cable not less than 11 TAB
IEC 60335-1.
When extension cables are used, make sure the cable wires are of adequate size to avoid voltage drops. For
connection of cables in a well, use thermo-shrinking sheathes or other methods for submersed cables.
ATTENTION:
When the pump is fed by a frequency converter, the minimum frequency should not fall below 25 Hz
and in any case the total head of the pump should never be lower than 2m.
Three-phase pumps
Install in the control box an overload-protective device in accordance curve type D with the nameplate
current.

Start-up and Operation

Preliminary checks before start-up of the pump
Do not start-up the device in case of damaged parts.

First starting

With a three-phase power supply make sure the direction of rotation is correct.
To check this close the discharge valve and measure the closed valve pressure with a pressure gauge
mounted between the valve and the pump discharge, or visually check the flow-rate.
Switch off power, invert the connections of two phases on the control panel, re-start and check the pressure
or flow rate capacity again.
The correct direction of rotation will provide a considerably greater and easily distinguishable pressure and
delivery capacity.
Make sure the pump is operating within its range of rated performance and that the absorbed current
indicated on the name-plate is not exceeded.