
the conditions of the application.
For installation of Hydromatic
supplied level controls, refer
to your system’s installation and
service manual.
Installing Pump in Sump:
Before installing pump in sump,
lay it on side and rotate impeller.
Impeller may be slightly stuck
due to factory test water so it must
be broken loose with small bar or
screwdriver in edge of vanes. The
impeller should turn freely. Do
not connect the power until after
this test.
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 is
highly recommended. This valve
should be installed on the
discharge side of the check valve
so 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 with short discharge lines;
otherwise water will return to the
sump and cause short cycling of
the pump.
Making Electrical Connections:
All electrical wiring must be in
accordance with local code, and
only qualified electricians should
make the installations. Complete
wiring diagrams are included
for use in making the installation.
All wires should be checked
for shorts to ground with an
ohmmeter or Megger after the
connections are made. This is
important, as one grounded wire
can cause considerable trouble.
IMPORTANT: If equipment
is not properly wired and
protected as recommended,
Hydromatic warranty is void.
See Page 5.
Heat Sensor and Seal
Failure Connections:
If a Hydromatic control panel
is used, terminal blocks are
provided for heat sensor, seal
failure connections (See Panel
Schematic). If a control panel
is supplied by others, it must
allow heat sensor and seal failure
terminations.
Starting System:
1. Double check all wire
connections.
2. Turn pumps to Off position
on H-O-A switches.
3. Turn on breakers.
4A. When using single phase
pumps, make sure red
pump lead is connected to
capacitor circuit, connect
amprobe to pump power cord
and turn pump on. Pump
will show high amp draw
momentarily, then as pump
comes off start wirings,
amps will drop to normal
nameplate amps.
4B. When using three phase
pumps (230/460/575), turn
H-O-A switch to Hand position
on one pump and notice
operation. If pump is noisy
and vibrates, rotation is
wrong. To change rotation,
interchange any two line
leads to pump. Do not
interchange main incoming
lines. Check rotation of all
pumps in this same manner.
Pump
Operations
Overload Heaters:
If the Hydromatic electrical panel
is not used, starters with 3 leg
overload relay must be
supplied on 3 phase pumps. Each
leg is to have an identical heater
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
start winding of pump using
single phase.
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 31⁄4" 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
Installation
Instructions
3