Sears 390.303491 - Manual (Page 5)

Grounding Outlet
If outlet is not groionded, install a copper wire (at least 14
gauge) from the outlet box, as shown in Figure 4, to a metal
cold water pipe. Use ground clamp on pipe.
IMPORTANT; The cold water pipe you use as a ground
must have metal continuity to electrical ground. If continuity
is interrupted by plastic, rubber, or other electrical insula­
tors; such as hoses, fittings, washers or gaskets (including
water meter or pump), a metal bypass must be used. Any
electrically insulated connector should be jumped (as shown
in Figure 5), with a length of No. 4 wire clamped securely
at both ends.
GENERATOR SIZING
Figure 4
Automatic Thermal Overload Protection
This pump motor has a built-in automatic thermal overload
protector. If the motor overheats, the protector will open
and cut off power to the motor before the heat damages it
internally. The overload will reset automatically and the
pump win restart after the pump cools down below the dan­
ger point.
AWARN1NG £)Q attempt to work on the pump or
motor if the overload seems to have tripped. The
motor may restart without warning at any time. You
could be injured and the pump damped if it starts
when you are working on it.
DO NOT attempt to repair a sump pump. Take it to SEARS
for service by a qualified technician.
Below is the Engine-Generator Watt rating required to
power this pump motor. Any additional loads, such as lights,
must be added to the listed load and the generator sized ac-
cordingly.
Pump Minimum Watt
Motor HP Rating of Generator
1/3 2,200
1/2 2,800
SERVICE
General
A WARNING I Risk of electric shock. When servicing
pump always discoimect power to electrical outlet
and remove pump electric cord from outlet. Inspect
sump pump and system components monthly. Keep
free of debris and foreign objects.
1. If pump does not operate;
a. Check for loose plug at electric outlet.
b. Check for blown fuses or tripped circuit breakers at
fuse box/circuit breaker box.
c. Be sure nothing interferes with action of float switch.
d. If a, b, and c above check OK, plug in a light that you
know works. If it lights, take your pump to SEARS for
service. If it doesn’t light, the electrical circuit is faulty;
consult a licensed electrician.
2. Pump starts, but blows fuses/trips circuit breakers:
After disconnecting power to pump, remove it from
sump. Remove the plate from the bottom of the pump
and make sure that the impeller turns freely. Remove any
debris obstructing impeller. If pump still does not oper­
ate correctly, return it to your nearest SEARS Service
Department for repairs.
3. Pump runs, but does not empty sump:
a. Clean pump intake screen.
b. Water may be entering sump faster than the pump can
discharge it.
c. Be sure vertical distance from pump discharge outlet
to discharge pipe outlet is 18 feet or less for Model
390.303302 (20 feet or less for Model 390.303491).
d. Be sure discharge pipe is not plumed or frozen.
LUBRICATION
Motor has been lubricated at the factory. It does not require
additional oil. Bronze bearing in volute housing is oil im­
pregnated. It does not require additional oil.