Operation & Maintenance Manual
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P a g e
7.
ELECTRICAL INSTALLATION
It is not feasible to state a specific installation arrangement due to the variance of sites and installation
configurations. Therefore it is important that the electrical installation be performed by a qualified
electrician in accordance with 17th, or later, edition of the Institute of Electrical Engineers (I.E.E.)
regulations, with appropriate current protection devices for the site configuration.
The supply to the sand filter should have a dedicated circuit incorporating isolation and protection
devices to the regulation requirements of the I.E.E. An earth leakage circuit breaker is recommended and
should be incorporated into the supply to the sand filter. A device with a 30mA maximum trip current is
recommended.
N.B. The wiring diagram is a separate sheet in the envelope containing all the other documents. If it is
missing or lost, please contact WPL for another copy.
Three Phase Connection
When the 3-phase supply is switched on, check the rotation of the blowers is correct. Incorrect rotation
will cause damage if run for more than a brief check. This observation must be done with all the air-
lines disconnected from the blowers.
IMPORTANT NOTE
IF THE THREE PHASE IS NOT CORRECTLY CONNECTED, SERIOUS DAMAGE CAN OCCUR. SHOULD A
POWER FAILURE OCCUR, ISOLATE THE SUPPLY TO THE UNIT. WHEN POWER IS RECONNECTED, ENSURE
THE PHASES AND ROTATION ARE CORRECT.