Overload Heaters:
If the
Hydromatic
electrical panel is not
used, starters with three-leg overload
protection must be supplied. On three-
phase pumps the heaters must be sized
in accordance with the nameplate amps
on the motor housing. The amp draw
on these submersible motors is slightly
higher than a corresponding horsepower
surface motor, so heaters must be sized
by the nameplate rating.
Single-phase pumps with capacitor
start have a run and a start winding,
each drawing a different current. To
adequately protect these windings with
the appropriate heaters, consult the
factory.
NOTE: Red lead is always the start
winding of pump using single phase.
IMPORTANT: If other than Hydromatic
starters are used, be sure the heat sensor
wires are connected in series with the
starter coil circuit.
Pump Installation
Installing Sump Level Control Float
Controls:
In either simplex, duplex or triplex
systems the lower or turn-off control is
to be set to maintain a minimum level in
the sump. This level shall be no more than
3-1⁄4" from the top of the motor housing
down to the surface of the sewage.
The second or turn-on control is set above
the lower turn-off control. The exact
distance between the two floats must
be a compromise between a frequent
pumping cycle (10 starts per hour max.)
to control septicity, solids and a slower
cycle for energy economy. This distance
should be determined by the engineer
or consulting engineer depending on the
conditions of the application.
Installing Pump in Sump:
Before installing pump in sump, lay it
on its side and turn impeller manually.
Impeller may be slightly stuck due to
factory test water so it must be broken
loose with a small bar or screwdriver
in the edge of the vanes. The impeller
should turn freely.
Clean all trash and sticks from sump and
connect pump to piping.
A check valve must be installed on each
pump. A gate or plug valve in each pump
discharge line is also recommended.
This valve should be installed on the
discharge side of the check valve so
that if necessary to service the check
valve, the line pressure can be cut off.
Single pump systems are sometimes
installed without a check valve where it is
desirable to self-drain the discharge line
to prevent freezing. This can be done only
3
proper starter heaters and connections
for heat sensor wires are furnished.
IMPORTANT: If Hydromatic electrical
controls are not used and the motor
fails because of improper components
or if the heat sensors are not properly
connected, the warranty is void.
Hydromatic electrical equipment is
installed in a weatherproof NEMA 3R
enclosure. The electrical equipment
includes a main circuit breaker for each
pump, a magnetic starter with overload
protection for each pump, an H-O-A
switch and run light for each pump, an
electric alternator and a transformer to
provide appropriate control for control
circuit and alarms.
Caution: The 230 volt 3 phase pump has
a dual marked nameplate. Voltage may be
rewired by the manufacturer or a Class
I Div 1 equipment qualified electrician.
Once the voltage is changed, the factory
cord tag indicating 230 volt 3 phase must
be removed.
For record keeping purposes, we suggest
the pump be marked externally with the
new voltage and qualified personnel that
performed the change. Pumps shipped
from the factory as 460 volt 3 phase
cannot be rewired to any other voltage.
To Re-wire the pump from 230V to
460V 3 phase:
Only a 230V pump from the factory is
considered dual voltage, a cord label
clearly states the factory wound voltage.
Remove all bolts securing cord assembly
then raise the cord cap assembly enough
to slip a prying instrument on opposite
sides between the cord cap casting
and the junction box. Take care to not
damage the o-ring or the machined
surfaces of the castings. Doing so could
void FM agency certifications. While
prying evenly on both sides; separate the
cord cap casting from the motor housing,
the assembly is airtight and will have
a vacuum effect when disassembling.
Once separated, the cord cap can be
inverted and rotated to the outside of
the pump assembly, and a bolt can be
re-used to secure the upside down cord
cap to the motor housing for ease of
rewiring.
Refer to the wiring diagram within
this manual for wiring details. Once all
electrical connections are finished and
secure (a crimped electrical connector
is best to prevent issues due to vibration
if required), the cord cap should be
re-attached reversing the steps above.
Ensure the o-ring is in place and perform
a hi-pot test for safety once everything is
complete.
with short discharge lines, otherwise
water will return to the sump and cause
short cycling of the pump.
NEMA 4 Junction Box: (Optional)
If the electrical control panel is to be set
remotely from the pump sump a NEMA 4
junction box should be used to make power
and control connections. The Hydromatic
NEMA 4 junction box is provided with
compression connectors for sealing all
wires. No sealing compound is needed to
make connections waterproof.
Wiring diagrams are provided with the
panel for making connections. An extra
set of diagrams is included so that one
set can be used in the sump when making
connections. The size wire to use from
panel to sump depends on motor size
and distance in feet. Be sure each wire is
checked out so that a wrong connection
will not be made.
Installing Switch Controls:
The controls are supported by a mounting
bracket that is attached to sump wall,
cover or to the NEMA 4 junction box.
Cord snubbers are used to hold the cord
in place. Control level can be changed at
any time by loosening the snubber and
readjusting cord length.
In either simplex or duplex system the
lower or turn-off control is set just above
the top of the volute so that the volute
will always be submerged during the
pumping cycle. The second or turn-on
control is set about 24 inches above the
lower turn-off control.
More distance between turn-on and turn-
off controls can be used but sewage may
become septic and excessive solids may
collect for the pump to handle. A frequent
pumping cycle is recommended for best
operation.
If an alarm system is used, this control
is usually set about six inches above the
override control.
Some engineers, as described previously,
prefer to have the alarm control set below
the override control.
Making Electrical Connections:
All electrical wiring must be in
accordance with local code, and only
competent electricians should make the
installations. A set of prints is included
for use in making the installation. All
wires should be checked for grounds
with an ohmmeter or Megger
®
after the
connections are made. This is important,
as one grounded wire can cause
considerable trouble.
IMPORTANT: If the equipment is
not properly wired and protected as
recommended, the warranty is void.
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