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PIPING
Pumps are fitted with 2" or 3" female threaded pipe flange.
Galvanized or PVC plastic pipe can be used. Plastic pipe is
preferred for raw sewage or septic tank effluent.
CHECK VALVES AND SHUT-OFF VALVES
All pumps must have check valves and shut-off valves in
the discharge line. Check valves must be flapper type with
outside spring or ball type. Shutoff valves can be ball or gate
type. Plastic construction for both check and shut-off valves
is preferred.
STARTING SIMPLEX SYSTEMS
1.
For single phase pumps with MLC or MFLC control,
plug cords piggy back into receptacle and run water into
sump until pump starts. Allow pump to make several on/
off cycles. Leave power cord plugged in. If pump runs
but does not pump it may be air locked. Unplug cord and
crack union in the discharge line then restart pump, this
should vent off any trapped air. Re-tighten union.
2.
With 2 "mercury" controls turn on power at the control
box and run water into sump. When level gets above top
control pump should start and continue to pump until
level drops to lower control stopping pump. Run pump
through several cycles. If pump runs but does not pump,
check air lock as in 1. Leave power on for automatic
operation.
3.
Where ALCL or AWS-1 controls are used plug in cord
or turn on power and run water into sump, when level
is about half way up on upper weight pump should start
and run until level drops until about half the lower weight
is above water, stopping pump. Check 1, if pump does
not operate properly. For all cases if motor does not start
when water level is up check for proper plug in or that
start switch is on, or if fuse is blown. ALWAYS HAVE
ELECTRICTIAN MAKE ELECTRICAL CHECKS.
STARTING PUMP "WHE-P" (AUTOMATIC)
USING MECHANICAL SWITCH WITH
SERIES PLUG-SIMPLEX SYSTEM
1.
These pumps have a mechanical (mercury-free) float
switch with a 20 ft. cord and 115 volt or 230 volt series
piggy-back plug on ½ H.P. with switch mounted to the
pump. On ¾ H.P. and 1 H.P., it requires 20 ft. cord and
230 volt only.
2.
Plug the switch cord plug into a proper voltage properly
grounded outlet.
3.
Plug the pump power cord into the back of the switch
cord series plug.
4.
Tape the cords to the discharge pipe every 12" .
5.
Run water into sump until pump starts. Be sure
discharge line valve is open.
6.
Allow pump to operate through several on/off cycles.
7.
If pump does not operate properly, see trouble shooting
service chart for remedy.
HOW TO SET CONTROLS AND START
DUPLEX SYSTEMS
CONTROL BOX MUST BE USED ON ALL DUPLEX
SYSTEMS
1.
4 "mercury" controls are used for duplex systems. Set
turn-on control 6" to 8" above pumps. Set turn-off control
AIR LOCKING
A sump pump is said to be air locked if water traps
in the pump and it cannot get out, thus preventing
pump from operating. ALL MYERS SUMP PUMPS
HAVE A SMALL AIR VENT HOLE IN THE IMPELLER
CHAMBER TO LET OUT TRAPPED AIR. IF THIS HOLE
BECOMES PLUGGED, PUMP MAY AIR LOCK. THIS
USUALLY HAPPENS ON PUMPS THAT ARE USED
MAINLY IN THE SEASONS. IN SUMMER MONTHS,
THE PUMP MAY BE TURNED OFF AS SUMP WATER
DRIED UP. WHEN PUMP IS TURNED ON AGAIN AND
WATER COMES UP IN SUMP, THE AIR WILL TRAP IN
PUMP IF NOT VENTED.
AS A SECONDARY PRECAUTION IN INSTALLATIONS
OF THIS TYPE – 1/8" 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.
In normal sumps where the pump is operating daily, air
locking rarely occurs.
8" to 10" above bottom of sump. Set override control 6"
to 8" above turn-on control. Set high level alarm control
about 6" to 8" above override control. Mark all control
cords so that they can be connected correctly in the
control box. See Fig. 4.
2.
Turn Hand-Off-Auto switches to OFF position and close
circuit breaker.
3.
Turn H-O-A switches to the AUTO position and run
water into sump. When level floats up and activates the
turn-on switch one pump should start and run, pump will
continue to run until lower control is exposed stopping
pump.
4.
Run water into sump again and when level floats up
turn-on control, opposite pump will start and run until
level drops exposing lower control, stopping pump.
5.
Run this test several times to be sure pumps are
alternating properly.
LEVEL CONTROL SYSTEMS AVAILABLE
1.
Simplex single phase packaged automatic system.
This system has the MLC or MFLC mercury float
switch attached directly to the pump. This system has a
fixed pump-off level of 8" to 10" and is usually used for
drainage water and is good up to and including 1 H.P.
2.
Simplex single phase pumps can use the ALC or AWS-1
controls which are mounted separate from the pump.
These controls can be used up to 2 H.P. motors. See Fig.
3
3.
Simplex pumps can use two "mercury" controls mounted
separate from the pump. These controls must be used
with a control box and magnetic contactor. These
controls can be spaced apart for any draw off level
required and can be used for 2 H.P. or larger motors.
4.
Duplex pump systems must use only the "mercury"
controls with electrical control box. These control boxes
mounted remote from the sump tank are generally of plastic
construction for best corrosion resistance. See Fig. 4.
5
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