Preparing To Start The Pump - Deep Well - Pentair Myers MFL Serie Manual Del Usuario

Preparing to Start the Pump – Deep Well
Never run pump against closed discharge. To
do so can boil water inside pump, causing hazardous
pressure in unit, risk of explosion and possibly scalding
persons handling pump.
Never run pump dry. Running pump without
water may cause pump to overheat, damaging seal and
possibly causing burns to persons handling pump. Fill
pump with water before starting.
Step 1. Open the control valve as far as possible (see
Figure 12). Then remove the priming plug from
the pump and fill the pump, fill all piping
between the pump and the well, and make sure
that all piping in the well is full. If you have also
installed a priming tee in the suction piping,
remove the plug from the tee and fill the suction
piping.
Figure 12: Fill Pump
Step 2. Replace all fill plugs and close the control valve
completely (Figure 13).
Figure 13: Prime Pump
Step 3. Power on! Start the pump and watch the pressure
gauge. The pressure should build rapidly to 50
PSI as the pump primes.
Open control valve
as far as possible
and fill pump and
piping through
priming port
or priming tee.
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Replace all
fill plugs and
close control
valve completely.
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Step 4. After 2 or 3 minutes, the gauge should show
pressure. If not, stop the pump, remove the fill
plugs, reopen the control valve, and refill the
pump and piping. You may have to repeat this
two or three times in order to get all the trapped
air out of the piping. Don't forget to close the
control valve each time before you start the
pump.
Step 5. When pressure has built up and stabilized at
about 50 PSI, slowly open the control valve (see
Figure 14) and let the pressure drop until the
pressure gauge needle starts to flutter. When the
needle flutters, close the valve just enough to
stop the flutter (see Figure 14). Your pump is now
operating at its most efficient point.
A-Open Control Valve
B-Watch for Pressure Gauge to Flutter
C-Close Control Valve until Pressure
Stabilizes
Figure 14: Set Control Valve
Step 6. After the pump has built up pressure in the sys-
tem and shut off, check the pressure switch oper-
ation by opening a faucet or two and running
enough water out to bleed off pressure until the
pump starts. The pump should start when pres-
sure drops to 30 PSI and stop when pressure
reaches 50 PSI. Run the pump through one or
two complete cycles to verify correct operation.
This will also help clean the system of dirt and
scale dislodged during installation.
Step 7. (PL Series pumps only). Check for leaks around
band clamp. If pump is leaking, tighten clamp
nut 1-2 turns. Do not overtighten.
NOTICE: Due to normal irregularities in the cup seal
leather and the inner walls of the casing, packer jets do
not form a perfect seal. In a dormant system, pressure
will leak off over time, causing pump to cycle periodical-
ly to maintain system pressure level.
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