Master PLUMBER 176950 Owner's Manual page 4

Installation
NOTICE If your check valve is not equipped with an air
bleed hole to prevent airlocking pump, drill a 1/8" (3.2 mm)
hole in discharge pipe just above where the discharge pipe
screws into the pump discharge. Be sure the hole is below
the waterline and the check valve to prevent air locks.
7. Power Supply: Pump is designed for 115 V., 60 Hz.,
operation and requires a minimum 15 amp individual
branch circuit. Both pump and switch are supplied
with 3-wire cord sets with grounding-type plugs.
Switch plug is inserted directly into outlet and pump
plug inserts into opposite end of switch plug.
Risk of electric shock. Can shock, burn
or kill. Pump should always be electrically grounded to a
suitable electrical ground such as a grounded water pipe
or a properly grounded metallic raceway, or ground wire
system. Do not cut off round ground pin.
8. If pump discharge line is exposed to outside sub-
freezing atmosphere, portion of line exposed must
be installed so any water remaining in pipe will drain
to the outfall by gravity. Failure to do this can cause
water trapped in discharge to freeze which could
result in damage to pump.
Frame
Mount
Bracket
For parts or assistance, call Master Plumber Pump Customer Service at 800-628-9439
Check valve
Air lock hole
Shaft
Shaft Sleeve
Shaft Seal
External
Retaining
Ring
9. After piping, check valve and float switch have been
installed, the unit is ready for operation.
10. Check the pump operation by filling sump with water
and observing pump operation through one complete
cycle. For switch settings see the Electrical and
Switch Specifications chart.
Risk of flooding. Can cause personal injury
and/or property damage. Failure to make this operational
check may lead to improper operation, premature failure,
and flooding.
Seal Plate
w/ Wear Ring
Impeller
O-Ring
Casing
O-Ring
6616 0712
Casing
w/ Wear Ring
6612 0712
4