Table des Matières
Publicité
Les langues disponibles
Les langues disponibles
Pump Servicing
Servicing should be per formed
only by an authorized service
center.
WARning: Always disconnect
the pump from power source
before handling or making any
adjustments. Always wear rubber
boots when there is water on the
floor and you must unplug the
pump or make any ad just ments.
NOTICE Automatic thermal
overload protects the sealed-
in-oil motor. Running dry may
overheat the motor and activate
the overload protector until the
unit cools.
Pump does not run or just
hums.
1. Line circuit breaker may be
off, blown or loose.
2. Water level in sump may be
too low to activate automatic
float or diaphragm switch.
3. Pump and/or switch cord plug
may not be making contact in
receptacle.
4. If pump is using the series
(piggyback) cord plug,
the two plugs may not be
plugged tightly together.
5. Float may be stuck. Be sure
float operates freely in basin.
6. If the unit is being operated
by the optional float control
switch, unplug the pump from
the pig gy back receptacle and
plug the pump directly into
the power source.
If the pump starts each time
4
it is plugged directly into the
receptacle and does not start
each time when plugged
into the piggyback switch
with the float raised up to
a start position, replace the
complete piggyback switch
assembly and retest with new
assembly.
7. If all symptoms check OK,
motor winding may be open;
take to authorized service
center for check.
Pump runs but does not
deliver water.
1. Check valve may be installed
backward. Arrow on valve
points in direction of flow.
2. Discharge gate valve, if used,
may be closed.
3. Pump may be air locked.
Start and stop several times
by plugging and unplugging
cord. Check vent hole in
pump case for plugging.
Pumps have a small air vent
hole in the impeller cavity
to let out trapped air. If this
hole becomes plugged, pump
may air lock. To break the air
lock, use a small screwdriver
to clear hole in the impeller
cavity.
As a secondary precaution
30
8
20
4
10
0
0
Capacity, US GPM
0
liters/second
0.0
0
cu meters/hr
in installations of this type —
1 ⁄16" hole should be drilled in
the discharge pipe below the
check valve. The check valve
should be 12 to 18 inches
above pump discharge. Do
not put check valve directly
into pump discharge opening.
NOTICE in sumps where the
pump is operating daily, air
locking rarely occurs.
4. Pump head may be too
high. Pump cannot deliver
water over 25' vertical lift.
Horizontal distance does not
affect pumping, except for
friction loss through the pipe.
5. Inlet in pump base may be
clogged. Remove pump and
clean out openings.
6. Impeller or volute openings
may be plugged or partially
plugged. Re move pump and
clean out.
Pump runs and pumps out
sump but does not stop.
1. Float is stuck in up position.
Be sure float is not hung up
and operates freely in basin.
2. Switch contacts may be
stuck; replace switch.
10
20
30
1.0
2.0
2
4
6
40
50
3.0
8
10
12
60
Publicité
Table des Matières
