Priming The Pump - aermotor SPCA Serie Manual De Instalación Y Funcionamiento

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 with-
out water in it will damage seals and can melt impeller
and diffuser. To prevent damage, fill pump with water
before starting.
1. Remove priming plug (Figure 10).
Figure 10 – Remove Priming Plug and Fill Pump
Before Starting
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.
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 run, be sure to fill
suction pipe through this tee and replace plug.
(Don't forget to Teflon tape the plug.)
5. Start pump: water should 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).
If no water is produced within 10 minutes, stop
pump, release all pressure, remove priming plug,
refill and try again.
Figure 11 – Run Ten Minutes or Less
Hazardous pressure and risk of ex-
plosion and scalding. If pump is run continu-
ously at no flow (that is, with discharge shut off
or without priming), 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 12 – 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 tempera-
ture. 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.
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