FLYGT MP-3067 - WGL20 Air Venting and Overload Protection; WGL20 Trouble Checklist; WGL20 Pump Does Not Pump Liquid

Air Venting:
Air tends to trap in the pump volute when water raises in the sump or when the pump is lowered into water after
service. To vent off this air, a small hole is drilled into the pump volute. Be sure this vent hole is clean after any
service work on pump.
Motor Overload Protection – The motor is provided with an on-winding overload switch. If motor overloads or
overheats for any reason, the switch opens stopping motor. As soon as the motor cools to normal temperature the
switch closes and restarts the motor.
MAXIMUM AMP & WINDING RESISTANCE VALUES
WINDING RESISTANCE IN
OHMS
BLACK
BLACK
RED TO
MAX
HP
SPEED
VOLTS
PHASE
TO
WHITE
TO RED
WHITE
AMPS.
2
3450
208
1
1.27
6.25
7.52
15.0
2
3450
230
1
1.56
7.84
9.40
12.0
2
2875
*380
3
12.6
12.6
12.6
5.1
2
3450
208
3
2.91
2.91
2.91
9.5
2
3450
230
3
3.15
3.15
3.15
8.4
2
3450
460
3
12.6
12.6
12.6
4.2
*50 Hz
If amp readings are higher than listed, it indicates voltage may be higher or lower than normal or that pump grinder
may be clogged with trash causing extra load on motor.
CHECK LIST IF PUMP DOES NOT OPERATE PROPERLY
CHECKING FOR MOISTURE IN MOTOR – Use ohmmeter and set on highest scale. Readings on the large
power cord between any of the conductors red, black, white to green conductor or motor shell should be more than
500,000 ohms. Motor probably will run with a lower reading, but if pump is out of service and reading is below
500,000 ohms the motor housing and stator should be removed and baked in a drying oven at 220°F. To be
serviced only at authorized service station.
RESISTANCE OF WINDINGS – Every motor winding has a fixed resistance and winding must check close to
the values given below to operate properly. This winding resistance also shows if motor is connected for voltage
being used. Use ohmmeter for this test and set on scale to read directly in ohms.
TROUBLE CHECK LIST
Troubles listed are generally caused by the pump. Other troubles can occur form a faulty control box. Those will
be listed with the control box instruction.
CONDITION PROBABLE CAUSE
Pump runs but does not 1. Pump impeller may be air locked, this occasionally occurs on a new
pump liquid from basin. installation. Start and stop pump several times to purge air.
2. Run additional water into basin so that pump will be submerged deeper to clear
water.
3. If air does not clear it may be necessary to lift pump out of sealing elbow and start
motor to allow pump to pump for a few seconds. If discharge is piped in with
union, slightly break union and start pump to clear air. Air vent hole is provided in
pump case, so some water will flow from this hole when pump is operating. If
vent hole gets clogged, clean out.
4. If pump has been installed for some time and does not pump, it may be clogged at
the grinder inlet.
5. Discharge gate valve may be closed.
6. Discharge check valve may be clogged or have a broken clapper.