7
Note
that
your
heater
is
also
rated
in
kW
hours.
The
pond
pump
and
heater
will
need
to
be
running
continuously
during
the
test
(ie:
with
the
heater
red
light
’On’)
To
avoid
inaccurate
results
when
performing
this
test,
it
is
important
to
refrain
from
using
other
high
current
consuming
appliances
in
the
property
(such
as
tumble
dryer,
showers,
cookers
etc).
A
large
aquatic
pump
of
1
horsepower
will
draw
less
than
1
‐
kW
in
a
one
hour
period.
The
conclusion
of
the
test
should
prove
that
for
example
3
‐
kW
heater
and
a
½
horsepower
pump
will
draw
between
3.3
‐
kW
~
3.5
‐
kW
in
one
hour.
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.
HEATER
WILL
NOT
SWITCH
‘ON’
In
most
cases
this
will
be
the
result
of
one
of
the
following
points
not
being
met.
Possible
cause
1:
The
required
temperature
has
been
achieved.
To
confirm:
increase
the
set
point
value
by
turning
the
temperature
set
point
dial
to
a
value
greater
than
the
current
water
temperature.
Possible
cause
2:
The
‘Thermal
safety
cut
‐
out’
has
tripped.
Remedy:
Remove
button
cover
and
press
red
button
to
re
‐
set
(see
fig
4)
If
a
positive
click
is
felt,
the
cause
of
the
tripping
must
be
investigated
and
could
be
caused
by
a
debris
build
‐
up
or
air
trapped
inside
the
flow
tube
of
the
heater.
Fig
4.
Trouble
Shooting
