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16 1005759 ISSUE 3
OWNER/INSTALLATION MANUAL
Electrolytic corrosion will occur when dissimilar metals
at are in contact wi each oer create a potential
difference between emselves. Sometimes separated
by a conductive substance known as an electrolyte, e
dissimilar metals will create a small voltage (potential
difference) at allows e ions of one material to pass
to e oer.
Just like a battery, ions will pass from e most positive
material to e more negative material.
Anying more an 0.3 volts can cause e most
positive material to degrade.
A swimming pool wi its associated equipment
can create is effect. The pool water being an ideal
electrolyte and components of e filtration circuit,
heating system, steps, lights etc providing e dissimilar
metals needed to complete e circuit.
Whilst ese small voltages are rarely a safety reat,
ey can create premature failure rough corrosion.
Not dissimilar to corrosion rough oxidation, electrolytic
corrosion can cause complete failure of a metallic
material in a very short period of time.
In order to prevent is type of corrosion all metallic
components in contact wi swimming pool water
should be bonded togeer using 10mm² bonding
cable. This includes non-electrical items such as metal
filters, pump strainer boxes, heat exchangers, steps
and handrails. It is highly recommended at bonding
be retrofitted to existing pools, which may not be
protected by is system.
All electrical work to be carried out in accordance wi
l.E.E.regulations, latest issue, or local codes of practice
as applicable. .
The machine should be installed in accordance wi
EMC2004/108/EC.
Always isolate e main ower supply before removing
machine covers.
The machine power supply must incorporate e
following. Fuses or motor type circuit breakers (aM
Fuse / MCB type C) to specified rating (see datasheet).
When using a fuse, H.R.C. fuses are recommended. An
isolator which disconnects all poles must be must fitted
wiin 2m and in line of sight of e heat pump. The
isolator must have a minimum of 3mm air gap when
turned off.
All units must be correctly eared/grounded and its
own separate type F RCD ear leakage trip installed
which protects e machine only.
The following limits of operation must not be exceeded.
Failure to provide e necessary voltages will invalidate
e warranty. This voltage must be available at e heat
pump whilst running. The voltage must not drop below
e above figures when starting e compressor.
Minimum Maximum
Voltage
Single phase machines 207V 253V
Cycle frequency (50Hz) 47.5Hz 52.5Hz
3�6 ELECTROLYTIC CORROSION IN SWIMMING
POOLS
3�7 ELECTRIC WIRING AND SUPPLY
16


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