Pentair MYERS HJ Serie Manual Del Usuario página 8

Installation
Deep Well Installation
Refer to Figure 4 for typical Deep Well installations.
1. Begin installation by attaching foot valve to close
nipple of corresponding size. Connect nipple/foot
valve assembly to bottom of ejector body. Next
install plastic nozzle and venturi into top of ejector
body. All connections must be watertight for pump to
operate correctly.
2. For 1/2 HP pumps, install 1" PVC adapter in ejector
body. Then install 1-1/4" female PVC adapter on
ejector body over the plastic venturi.
2A. For 3/4 and 1 HP pumps, install a 1-1/4" female
PVC adapter on ejector body over the plastic venturi.
Then install a 1-1/4" x 5" nipple in ejector body,
followed by a 1-1/4" female PVC adapter.
Cement rigid PVC pipes into the pipe adapters on
the ejector body. Add rigid PVC pipes and couplings
(as required) while lowering ejector assembly into
the well with pipe clamps.
NOTICE Removing foot valve screen will
void warranty.
After lowering pipes and ejector assembly into well,
install well seal. Draw up bolts on well seal until the
rubber gaskets are tight against the well casing and
the two plastic pipes.
3. For 1/2 HP pumps, cut pipes at length to position
foot valve 5 feet above bottom of well. Cut top of 1"
pipe 2" shorter than the 1-1/4" pipe, as shown in the
installation diagram.
Cement 1-1/4" PVC elbow and 1" PVC elbow to
the top of each pipe. Cement 1-1/4" and 1" rigid
PVC horizontal pipes to elbows. Thread 1-1/4" PVC
adapter into top opening in pump face. Install 1"x4"
nipple into bottom opening of pump face. Add 1"
female PVC adapter onto nipple. Cut 1" horizontal
pipe 3-1/2" shorter than 1-1/4" horizontal pipe.
Cement 1-1/4" and 1" horizontal pipes to these
adapters. Horizontal pipes should slope up to pump
from elbows.
3A. For 3/4 and 1 HP pumps, cut length of pipe to
position foot valve 5 feet above bottom of well.
Cut the top of the drive pipe 2-1/4" shorter than
delivery pipe, as shown in the installation diagram.
Cement PVC elbows to each pipe. Cement rigid PVC
horizontal pipes to elbows at the top of the well. Add
pipe sections and couplings (as needed) to connect
to the pump. Thread 1-1/4" PVC adapters into
openings in pump face. Cement rigid PVC horizontal
pipes into adapters. Horizontal pipes should slope
up to pump from elbows.
NOTICE Installing a check valve between the pump and
tank can cause short cycling in the following conditions:
a. Leaky foot valve
b. Long horizontal suction line
c. Air trapped in suction line
d. Wells with gaseous water
To resolve this problem you can:
a. Remove the check valve completely.
b. Move the check valve beyond the tank.
c. Change the pressure switch tap to the tank tee.
4. Go to Electrical section and make electrical
connections as described.
5. After electrical work is completed and before pump
is connected to pressure tank, the pump should be
primed and test run. To prime, fill the piping and the
pump with water through discharge outlet until the
water overflows (for deep well packer installations,
remove plug from packer adapter). Before starting
pump, place large bucket or other container under
check valve opening.
6. Install pressure regulator into pump discharge outlet.
Install brass fittings and tubing to connect pressure
switch to pressure regulator. Install pressure gauge
(purchase separately) into pressure regulator.
7. Start motor. Turn regulator adjusting screw down
tight. If pump is properly primed, a high pressure
will immediately show on pressure gauge. If no
pressure is obtained: (1) stop motor; (2) remove
priming plug; and (3) add more water.
With pump operating at high pressure, slowly
unscrew regulator adjusting screw until maximum
water flow is obtained without pressure dropping to
zero. If pressure does drop completely, again tighten
down regulator adjusting screw and readjust until
steady operation is obtained. The steady pressure
will be the operating pressure and should not be less
than the value shown here.
Operating Pressure (Two Pipe, Deep Well)
1/2 HP
24 PSI
8. Allow pump to empty into container long enough to
clear the well of any sand or dirt and to be sure the
well is not going to run out of water.
9. Stop pump and complete connections to pressure
tank, as described in Tank Connection. Allow
pump to cycle automatically several times to check
pressure switch setting and operation. Make sure
the pressure switch is set low enough to shut off the
pump. If a valve is shut off and the pressure switch
setting is too high, the pump will run continuously
without water flow. This will overheat and damage
the pump.
3/4 HP 1 HP
26 PSI 32 PSI
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