Blue Angel Pumps BAHGP2-2021E1 - Manual (Page 4)

4
Operating Instructions 2HP Grinder Pumps
Recommended level sensing settings:
1. The lower “turn-off” control should
be set so the pump stops with the
liquid level at the top of the motor
housing.
2. The upper “turn-on” control should
be set approximately 8” above the
“turn-off” control. This should limit
the number of pump starts to not
exceed 10 starts per hour.
3. The “lag-on” control for duplex
operation should be set 4” above
the “turn-on” control.
4. The “alarm” control is set 10” above
the “turn-on” control.
5. No control should be set above the
inlet pipe.
Note: If pump is not mounted on a
lift-out rail system, the leg kit needs
to be installed. Set leg height so a 3”
– 4” clearance is achieved between the
bottom pump inlet and basin bottom.
Maintenance
Only qualifi ed mechanics with proper
tools and knowledge should attempt to
service this pump.
REPLACING GRINDER IMPELLER AND
SHREDDING RING
Note: This is the only disassembly
operation permitted in the fi eld. All
other repairs must be performed at an
authorized service center or the factory.
Standard Tools Required:
• Standard socket wrench set
• Standard set of open-end
wrenches
• Hammer
• Vise grip pliers
• Allen head socket set
• Screwdrivers
• Wire
brush
Disconnect
all power
and control wires to motor at the control
panel before starting the disassembly
operations. Do not rely upon opening
the circuit breaker only.
Hazardous
cutter.
Rotation of the cutter with hands in the
cutter area can cause loss of fi ngers.
Keep hands away from the pump inlet
opening when working on or handling
the pump for any reason.
Pump
should
be sanitized with bleach before starting
work.
• Pump should be thoroughly
cleaned of trash and deposits
before starting disassembly
operations.
• Wear protective gloves and
clothing.
• Always use a rag on the impeller
when turning to prevent cutting
hands on the sharp edges of the
shredding ring.
DISASSEMBLY OF SHREDDING RING
AND GRINDER IMPELLER
1. Remove 3 bolts from grinder ring
fl ange with socket wrench. The
grinder ring is pressed into the
fl ange for convenient removal.
2. Thread 2 of the bolts (removed from
the grinder ring fl ange) into the
tapped back-off holes in the fl ange
and evenly tighten the bolts to back
the grinding ring out of the pump
housing.
3. Hold the grinder impeller by prying
against the impeller cutting bar and
remove the cap screw from the end
of the shaft.
4. Use a large screwdriver to the slot
of the shaft and tap on the cutter
vane with a hammer. Tap in a
counterclockwise direction (thread is
right-hand).
5. If the impeller removes easily, clean
and replace if worn.
6. Make sure the pump impeller has
not loosened when the grinder
impeller was removed. This can be
checked on reassembly of grinder
impeller and shredding ring. The
tips of the impeller cutter vanes
should extend 1/8” below the
bottom of the shredding ring. If
the distance is greater, the pump
impeller has loosened. If the
distance is less, shredding ring is not
properly seated.
7. After the volute case has been
removed, wrap emery cloth around
the shaft and hold with vise grip
pliers. Us a cloth on the impeller and
thread tight against shoulder on
shaft.
8. Clean all threads with a wire
brush and fi le smooth any nicked
threads. Apply an anti-seize or other
graphite compound on threads
before replacing grinder impeller.
9. Make sure cap screw in bottom of
pump shaft is tight. Hold impeller
with screwdriver between the cutter
bar and teeth of shredding ring
while tightening the cap screw.
10. Make sure the impeller turns freely
by hand after reassembly. Some
drag will be present due to the
shaft seals. There should not be any
binding or tight spots when turning
the grinder impeller.
11. If there is any rub or drag on the
shredding ring, loosen the 3 bolts
in the shredding ring plate and
tap lightly with the hammer to
loosen. Retighten the bolts. Be
sure to tighten the bolts evenly,
applying pressure on all 3 bolts. DO
NOT COMPLETELY TIGHTEN ONE
BOLT BEFORE TIGHTENING THE
OTHER BOLTS. THIS WILL CAUSE
MISALIGNMENT AND LOCKING OF
SHREDDING RING AND GRINDER
IMPELLER.
HP Voltage Phase Breaker Size Heater Size
2 230 3 20 Amp K-50
2 460 3 15 Amp K-33
Chart 3
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Figure 3 - Leg Kit
5
Operating Instructions 2HP Grinder Pumps
Troubleshooting
Symptom Possible Cause(s) Corrective Action
Motor Not Running 1. Motor Protector Tripped 1. Allow motor to cool. Make sure pump is completely submerged.
Clear debris from volute and impeller.
2. Open circuit breaker or blown fuse 2. Reset breaker. If circuit opens repeatedly, don’t reset it. Call a
licensed electrician.
3. Impeller clogged 3. Check amp draw. If it is more than twice the nameplate amps, the
impeller is locked. Bearings and shaft may be damaged. Disconnect
Power, clear debris from volute, impeller and cutter as needed.
4. Cutter clogged 4. Disconnect Power, pull pump and inspect cutter and cutter ring.
Replace if worn.
5. Power cable damaged 5. Resistance between power cable and ground should be infi nity. If
any reading is less than infi nity, call a licensed electrician.
6. Bad control panel 6. Inspect control panel wiring. Call a licensed electrician.
7. Defective liquid level switch 7. With switch disconnected from power, check continuity through
switch while activating liquid level switch. Replace switch if
necessary.
8. Not enough liquid in wet well to
activate controls
8. Allow the liquid to rise several inches above the switch-on level.
9. Liquid level cords tangled 9. Untangle cords for free operation.
10. Automatic controls defective 10. Try running pump in manual mode. If it runs, the automatic
control is at fault.
Pump runs continuously 1. Liquid level control cords tangled 1. Untangle cords for free operation.
2. Pump is air-locked 2. Stop pump for about one minute and then restart. Repeat
stopping and starting until the airlock clears. If the airlock
continues, Disconnect Power, pull the pump and drill a 1/8” hole
in the discharge pipe between the pump discharge and the check
valve.
3. Incoming fl ow exceeds the pump’s
capacity
3. A larger pump or additional pumps may be required.
4. Clogged line 4. Discharge line could be clogged. Unclog line.
Pump delivers low volume
of liquid 1. Check valve plugged, stuck shut or
installed backwards
1. Make sure check valve is installed correctly and functioning
correctly.
2. Systems head is too high 2. Consult dealer.
3. Pump suction plugged 3. Disconnect power, pull pump, inspect and clear as needed.
4. Wrong voltage or not wired correctly 4. Check pump’s rotation, check nameplate voltage against supply
voltage, consult licensed electrician.
5. Pump air-locked 5. Stop pump for about one minute and then restart. Repeat
stopping and starting until the airlock clears. If the airlock
continues, Disconnect Power, pull the pump and drill a 1/8” hole
in the discharge pipe between the pump discharge and the check
valve.
6. Worn or damaged impeller 6. Disconnect Power, pull pump and inspect impeller. Replace if
necessary.
7. Liquid level controls incorrectly
installed or defective
7. Reposition or replace as necessary.
Pump cycles frequently 1. No discharge check valve installed 1. Install discharge check valve.
2. Discharge check valve stuck open 2. Repair or replace check valve as necessary.
3. Sewage basin too small 3. Consult dealer.
4. Liquid level controls incorrectly
installed or defective
4. Reposition or replace as necessary.
5. Pump too small for inlet fl ow 5. Consult dealer about larger pump or second pump.
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