Operation; Priming The Pump - Master 123340 Owner's Manual

Operation

PRIMING THE PUMP

NOTICE: 'Priming' refers to pump expelling all air in the
system and beginning to move water from its source out
into system. It does not refer only to pouring water into
pump (although pouring water in is usually the first step).
NEVER run pump dry. Running pump with-
out water may cause pump to overheat,
damaging seal and possibly causing burns to
persons handling pump. Fill pump with water before
starting.
Step 1. Remove priming plug.
Step 2. Make sure suction and discharge valves and any
hoses on discharge side of pump are open.
Step 3. Fill pump and suction pipe with water (Figure 5).
Figure 5: Fill Pump Before Starting
Step 4. Replace priming plug, using Teflon tape on
thread; tighten plug.
NOTICE: If priming tee and plug have been pro-
vided for long horizontal run, be sure to fill suc-
tion pipe through this tee and replace plug. (Use
Teflon tape on plug.)
Step 5. Start pump; water should be produced in 10 min-
utes or less, time depends on depth to water (not
more than 20' (6 m)) and length of horizontal run
(10' (3 m) of horizontal suction pipe = 1' (30.5 cm)
of vertical lift due to friction losses in pipe). If no
water is produced within 10 minutes, stop pump,
release all pressure, remove priming plug, refill
and try again.
For parts or assistance, call Master Plumber Customer Service at
ing hazardous pressure in unit, risk of explosion and
possibly scalding persons handling pump (Figure 6).
Replace priming plug with pressure gauge to monitor
pressure so that it is not allowed to exceed maximum
pumping pressures according to performance chart.
Figure 6: Do Not Run Pump With Outlet Shut Off
NOTICE: Open water system faucets before priming
pump for the first time.
Remove priming plug.
Step A. Fill pump and suction pipe with water.
Step B. Replace priming plug, using Teflon tape on plug
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thread; tighten plug.
Step C. Be sure discharge is open whenever pump is
running.
Step D. If pump fails to produce water when attempting
to prime, release all pressure and refill with cold
water before trying again.
Step E. When priming, monitor pump body and piping
temperature. Motor will warm up; this is normal.
If pump body or piping begin to feel warm to
touch, shut off pump and allow system to cool.
Release all pressure in system and refill pump
and piping with cold water.
Step F. Make sure discharge pipe and zone size are not
too small for this pump's performance.
NEVER run pump against closed discharge.
To do so can boil water inside pump, caus-
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