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OPERATION
PRIMING
THE PUMP
NOTICE:
'Priming'
refers to the pump
expelling
all air in the
system
and beginning
to move water from its source out into
the system.
It does not refer only to pouring
water
into the
pump
(although
pouring
water
in is usually the first step).
NOTICE:
NEVER run
pump
dry.
Running
pump
without
water
in it will damage
seals and can melt impeller
and dif-
fuser.
To prevent
damage,
fill pump
with
water
before
starting.
1. Remove
priming
plug (Figure
7).
Figure
7 - Remove
Priming
Plug
2. Make sure suction
and discharge
valves and any hoses on
discharge
side of pump
are open.
3. Fill pump
and suction
pipe with water.
Figure 9 - Run Ten Minutes Or Less
If no water is produced
within 10 minutes, stop pump,
release all pressure,
remove priming plug, refill and try
again.
[AWARNING] Hazardous
pressure
and risk of explo-
sion and scalding.
If pump
is run continuously
at no
flow (that is, with discharge
shut off or without
prim-
ing), water
may
boil in pump
and piping
system.
Under steam pressure,
pipes may rupture,
blow off of
fittings
or blow out of pump
ports
and scald anyone
near.
Figure
8 - Fill Pump
Before Starting
4. Replace
priming
plug,
using
Teflon
tape
on thread;
tighten
plug.
NOTICE:
If a priming
tee and plug have been
provided
for a long
horizontal
rnn,
be sure
to fill suction
pipe
through
this tee and replace
plug. (Don't
forget to Teflon
tape the plug.)
5. Start pump:
water shonid
be produced
in 10 minutes
or
less, the time depending
on depth
to water
(not
more
than 20') and length
of horizontal
run (10' of horizontal
suction
pipe
= 1' of vertical
lift due to friction
losses
in
the pipe).
Figure
10 - Do Not
Run Pump
With
Discharge
Shut
Off
To prevent
explosion,
do the following:
A. Be sure discharge
(valve, pistol grip hose nozzle,
etc.) is
open whenever
pump
is running.
B. If pump
fails to produce
water when
attempting
to prime,
release all pressure,
drain pump
and refill with cold water
after every two attempts.
C. When
priming,
monitor
pump
and piping
temperature.
If
pump
or piping
begin to feel warm
to the touch,
shut off
pump
and allow .system to cool off. Release
all pressure
in system
and refill pump
and piping
with cold water.
7
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