MYERS WG30 GRINDER PUMPS
STARTING THE SYSTEM
1.
Open gate valves on discharge piping.
2.
Set pump switches at control box to auto position and turn on power. Fill sump with water until controls start
pump. Allow pump to operate until level drops, stopping pump.
3.
If system is duplex turn both pump switches to off and fill sump above upper control. Turn both pump
switches to auto position. Both pumps should run and pump sump down to lower control.
4.
Leave both switches in auto-position and pump is ready for automatic operation.
5.
A small hole is drilled in the pump case to prevent air lock so some water flows from this hole when pump is
operating.
IN CASE OF TROUBLE CHECK THE FOLLOWING
A.
Pump runs but does not deliver water.
1.
May be air locked. Lift pump and reseat on lower casting.
2.
Discharge shut-off valve may be closed.
3.
If pump is 3 phase, may be running in wrong direction. Pump should be checked before installing in sump
for proper rotation.
ROTATION: Counterclockwise when looking into pump inlet.
CAUTION: KEEP HANDS AND FINGERS AWAY FROM GRINDER IMPELLER WHEN MAKING
THIS CHECK.
If 3 phase rotation is wrong, interchange any two line leads at he control box to reverse motor.
CAUTION: BE SURE CONNECTED POWER AGREES WITH DATA ON PUMP NAME PLATE.
B.
Check valve seal fitting leaks.
1.
“O” Ring seal may be cut.
2.
Trash may be caught under flange. Lift out and reseat. It may be necessary to run pump lifted out of seal
casting to flush trash away from seal inlet.
C.
Proper setting of level controls. Controls should be set so that pump stops when level is about 3 inches above
pump inlet.
If controls are set too high, trash and grease will accumulate on the surface and may cause clogging.
CAUTION: NEVER WORK ON PUMPS OR CONTROLS UNLESS POWER IS TURNED OFF. IF PUMP
IS REMOVED FROM CONTROL BOX, DISCONNECT WIRES TO PUMPS TO BE CERTAIN POWER
CANNOT BE TURNED ON. THIS MEANS ALL WIRES INCLUDING CONTROL WIRES. NEVER PUT
HANDS NEAR GRINDER IMPELLER ON ANY RUN CHECKS.
MAXIMUM AMP & WINDING RESISTANCE VALUES
WINDING
RESISTANCE
IN
OHMS
BLACK
BLACK
RED TO
MAX
MODEL HP SPEED VOLTS PHASE TO
WHITE
TO RED
WHITE
AMPS.
WG30-
21
3
3450
230
1
.47
3.14
3.61
36
WG30-
03
3
3450
200
3
.72
.72
.72
20.5
WG30-
23
3
3450
230
3
.72
.72
.72
17.8
WG30-
43
3
3450
460
3
2.9
2.9
2.9
8.9
WG30-
53
3
3450
575
3
6.5
6.5
6.5
7
