5
If
the
heater
is
hard
wired
in
to
a
power
box,
it
must
be
installed
in
accordance
with
the
country
/
regional
requirements
and
regulations.
In
any
event
the
work
must
be
carried
out
by
a
qualified
electrician,
who
will
provide
a
certificate
of
conformity
upon
completion
of
the
work.
It
is
essential
that
the
power
supply
to
the
heater
is
protected
by
a
GFIC
(
Ground Fault Interruption Circuit
).
If
in
doubt
consult
a
qualified
Electrician.
The
flow
rate
of
water
into
the
heater
must
not
exceed
17,000
litres
per
hour
(17m3/h
/
4500
US
gallons/hour)
A
higher
flow
rate
will
require
the
installation
of
a
bypass
to
prevent
damage
to
the
heater
elements.
The
heater
will
not
operate
with
a
flow
rate
below
1,000
litres
/
hour
or
10
US
gallons/hour
The
water
quality
must
be
within
the
following
limits:
PH
6.8
‐
8.0
TA
(Total
alkalinity)
80—140ppm
(parts
per
million)
TDS
(Total
Dissolved
Solids)
/
Calcium
hardness
200
‐
1,000ppm
The
Cygnet
Aquatic
heaters
are
suitable
for
use
with
salt
water
ponds
with
a
salt
concentration
up
to
8000ppm
(8g/litre).
Water
chemistry
is
complicated
if
in
doubt
seek
expert
advise.
Power
Requirements
Flow
Requirements
Water
Quality
115V
1
Phase
‐
Power
Input
Load
Amps
0.5
‐
kW
4.5
1
‐
kW
9
1.5
‐
kW
13
