109
18.4.4.2 Automatic pump flow test
Each
water
supply
pump
in
the
installation
shall
be
tested
at
the
full
load
condition
(by
means
of
the
test
line connection
coupled
to
the
pump
delivery
branch
downstream
of
the
pump
outlet
back
pressure
valve)
and shall
give
the
pressure/flow
values
stated
on
the
nameplate.
NOTE
:
Appropriate
allowances
shall
be
made
for
pressure
losses
in
the
supply
pipe
and
valves
between
the source
and
the
‘C’
gauge
of
each
installation.
18.4.4.3 Diesel engine failed-to-start test
The
failed-to-start
alarm
shall
operate
after
the
sixth
cycle
of
cranking,
when
the
following
sequence
is
carried out
:
a)
the
fuel
supply
shall
be
isolated;
b)
the
engine
shall
be
cranked
for
not
less
than
15s;
c)
cranking
shall
be
stopped
for
not
less
than
10s
and
not
more
than
15s;
d)
(b)
and
(c)
shall
be
repeated
a
further
five
times;
e)
the
fuel
supply
shall
be
restored.
Immediately
after
this
test
the
engine
shall
be
started
using
the
manual
starting
system.
18.4.4.4 Float valves on water storage tanks
Float
valves
on
water
storage
tanks
shall
be
checked
for
correct
function.
18.4.4.5 Pump suction strainers
Pump
suction
strainers
and
settling
chamber
screens
shall
be
inspected
at
least
annually
and
cleaned
as necessary.
18.4.5 3 Yearly routine
18.4.5.1 General
The
following
checks
and
inspections
shall
be
made
at
intervals
of
not
more
than
3
years.
18.4.5.2 Storage and Pressure tanks
All
tanks,
except
single
superior
supplies,
shall
be
examined
externally
and
internally.
The
tanks
shall
be cleaned
and/or
repainted
and/or
have
the
corrosion
protection
refurbished,
as
necessary.
18.4.5.3 Water supply stop valves, alarm and non-return valves
All
water
stop
valves,
alarm
and
non-return
valves
shall
be
examined
and
replaced
or
overhauled
as necessary.
18.4.6 15 yearly routine
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