6
Upon
completion
of
the
installation,
run
the
water
‐
circulating
pump
to
purge
the
system
and
heater
of
air
(i.e.
remove
any
trapped
air
in
the
system
and
heater).
TIP:
You
can
encourage
air
out
of
the
heater
flow
tube
by
gently
elevating
the
exit
port
of
the
heater
when
the
pump
is
running.
The
heater
will
only
switch
‘On’
(red
light
indicator
illuminated)
when
the
following
criteria
are
met
ie:
·
Water
circulating
pump
is
‘On’
delivering
in
excess
of
1,000
litres
/
hour
(1m3/h
or
220
gallons/hour)
·
Required
temperature
is
set
to
a
higher
value
than
the
water
temperature.
Useful
advice:
To
reduce
running
costs
and
speed
up
the
heating
process,
insulate
the
pond
wherever
possible.
Observe
the
main
electricity
meter
when
the
heater
is
on
(ie:
red
light
‘On’)
and
then
observe
it
again
when
the
red
light
is
off.
The
test
should
show
that
the
meter
is
recording
more
electricity
being
used
by
the
heater
when
the
red
light
is
‘On’.
It
is
impossible
for
an
electric
heater
to
waste
energy,
if
it
is
drawing
power
then
that
power
will
be
turned
into
heat
that
will
be
transferred
to
the
water.
If
a
more
accurate
test
is
required
to
confirm
that
your
heater
is
delivering
the
specified
heat
output,
two
electricity
meter
readings
will
need
to
be
taken
from
the
properties
main
electricity
meter,
with
an
exact
one
hour
interval
(ie:
take
one
meter
reading
and
then
a
second
reading
exactly
one
hour
later)
then
by
subtracting
the
first
reading
from
the
second
reading
the
number
of
units
(kilowatts
/
kW)
consumed
can
be
calculated.
Operating
Instructions
Quick
Function
Test
Accurate
Function
Test
