Switch Replacement - Pentair MYERS MSE50 Manual De Instalación Y Servicio

11. Remove seal. Remove the
old stationary portion of the
seal (7) from the seal plate
by inserting a screwdriver
into the seal housing of the
seal plate from the top of
the case and tapping lightly
with a hammer. Clean the
seal area of the seal plate
(1) with a clean cloth.
12. Reinstall the rotor and shaft
assembly. Push on outer
face to seat bearing in seal
plate.
13. Reinstall seal. Apply a good
lubricant to the new
stationary portion of the
seal (7) and press into the
seal plate. Coat the new
rotating portion of seal with
lubricant and press into
place on the rotor shaft
with
the rubber ring facing
the impeller.
14. Reinstall impeller. Add a
drop of Loctite 222 to
the shaft and screw the
impeller on hand tight.
The impeller will force the
rotating portion of seal into
position.
15. Replace seal ring. Remove
the old square seal ring
from the seal plate and
stretch on a new ring
coated with O-ring lube.
Do not roll the ring onto
the seal plate or improper
seating and water leakage
into the motor housing will
result.
16.Reinstall the stator. Place
the stator (3) in the seal
plate (1) so the stator
bolt holes line up. Lay the
stator plate on the stator
(3) and line up with stator
bolt holes. Slide the ring
terminal of the ground
lead wire over one of the
4 4
stator bolts. Put in the
stator bolts and tighten
evenly to prevent cocking
of the stator. Connect the
capacitor to the capacitor
leads. Push the connectors
of the two black stator leads
onto the power cord pin
terminals. Push the ground
wire sleeve terminal over
the ground pin terminal.
(identified with the 'bump'
on the molded terminal
housing)
17. Reassemble pump. Replace
the motor cover (10) on
the seal plate (1). Place
the assembly on the volute
(2). Insert the three cap
screws (9) through the
motor housing ears, into
the tapped holes in the
volute. Tighten them evenly
to prevent cocking the
motor housing and causing
an uneven seal on the seal
ring.
18. Oil. Fill the motor cap with
high grade transformer oil
just covering over stator
end cap.
Do not fill the motor
housing
completely – allow airspace
for oil expansion. Make
sure the stator is fully
immersed. You will have
to peer through the oil
plug hole to be sure of the
correct oil level.
19. Reinstall oil pipe plug. Coat
pipe threads with thread
sealant before installing.
Plug into housing (14).
20. Check pump. Plug the
power cord into a grounded
outlet and start pump
by raising the switch rod
extending out of the switch
housing. Motor should run
smoothly, be free
of vibration and stop when
pressure is removed from
diaphragm switch.
21. Check for air lock. Myers
pumps have a small air
vent hole in the impeller
cavity to let out trapped
air. If this hole becomes
plugged, pump may air
lock. To break the air
lock, use a small
screwdriver to clear hole in
the
impeller cavity.
Switch
Replacement
As a secondary precaution
in installations of this type
— 1⁄16" hole should be
drilled in the discharge
pipe below the check valve.
The check valve should be
12 to 18 inches above pump
discharge. Do not put check
valve directly into pump
discharge opening.
NOTE: In basins where the
pump is operating daily,
air locking rarely occurs.
1. Disconnect power to the
pump.
2. Remove the pump from the
sump. Disinfect it for one
hour with chlorine bleach.
Wear rubber gloves when
handling the pump.
3. Remove the bottom tether
strap from the float rod, lift
the float and swing it
sideways, and remove it
from the switch arm.
4. Remove the four screws
that secure the switch
to the top of the motor
housing and lift the switch
off the motor. The switch
guard may come off with it.