Operation; Priming The Pump - Pentair AERMOTOR VNA Serie Manual Del Usuario

Operation

6 0
4 0
2 0
8 0
1 0 0
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Figure 8: Close Regulator
Figure 9: Fill Pump
ON
OFF
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Figure 10: Start Pump

PRIMING THE PUMP

NEVER run pump dry. Running pump without water may
cause pump to overheat, damaging seal and possibly causing burns to per-
sons handling pump. Fill pump with water before starting.
NEVER run pump against closed dis charge, to do so can boil
water inside pump, causing hazardous pressure in unit and possibly scald-
ing persons handling pump.
NOTE: Open water system faucets before priming pump for the first time.
Step 1. Remove pressure gauge.
a. Close regulator valve (turn clockwise - see Figure 8).
b. Fill pump and suction pipe with water (Figure 9).
c. Replace pressure gauge, using PTFE pipe thread sealant tape on
thread; tighten gauge.
IMPORTANT: If a priming tee and plug have been provided for a long hor-
izontal run, be sure to fill suction pipe through this tee and replace plug.
(Don't forget to PTFE pipe thread sealant tape the plug.)
Step 2. Start Pump (Figure 10): Pressure should build rapidly to 50 pounds
per square inch or more as ejector and pump prime.
IF NO PRESSURE OR NO WATER, REPEAT STEPS IN No.1 (above) two or
three times to remove entrapped air from the suction pipes.
Step 3. If, after priming pump several times, no water is pumped, check
the following:
a. Suction pipe in the water and has no leaks.
NOTE: Air can leak in even where water won't leak out.
Make sure all joints are tight.
b. Control valve, check valve, or foot valve installed and
operating correctly.
c. Pump trying to lift water more than rated lift for deep well
ejector used (including compensation for horizontal offset).
See catalog for specifications.
d. Be sure pump is not airlocked. In offset installations, pump
suction port should be highest point in suction pipe; there
should be no sags in suction pipe (run it straight and at a
slight angle upward from well head to pump).
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