3
Alarm Controls:
The alarm level is usually set
above the override level so the
alarm will signal only if the
override level is exceeded.
However, some engineers prefer
to have the alarm level set below
the override level as it is pos si ble
for one pump to fail and the other
pump to operate on the override
level with the sump level never
reach ing the alarm level. This is
par tic u lar ly true in cases of low
inflow capacity.
Electrical Control Panel:
It is recommended that the
Hydromatic
®
control panel be
used with all pumps as proper
starter heat ers and connections for
heat sensor wires are fur nished.
Hydromatic electrical equipment
is installed in a weatherproof
NEMA 3R enclosure. The
electrical equip
ment 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, and an electric
alternator and a transformer to
provide appropriate control for
control circuit and alarms.
Overload Heater:
Starters with 3 leg overload
protection must be supplied if
the Hydromatic electrical panel
is not used. The heaters must
be sized in accordance with the
nameplate amps on the motor. 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.
IMPORTANT: Make certain
the heat sensor wires are
connected in series with the
starter coil circuit if other than
Hydromatic starters are used.
Installation
Instructions
Installing Pump in Sump:
Before installing pump in sump,
lay it on side and turn impeller
manually. Im
pel
ler may be
slightly stuck due to factory test
water, so it must be bro ken loose
with small bar or screwdriver
in edge of 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 the line pressure can be cut
off if necessary to service the
check valve. Single pump systems
are sometimes installed without a
check valve where it is desirable
to self-drain the dis charge 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.
NEMA 4 Junction Box
(Optional):
A NEMA 4 junction box should
be used to make power and
control con nec tions if electrical
control panel is to be set remote
from the pump sump. The
Hydromatic NEMA 4 junction
box is provided with com pres sion
con nec tors for sealing all wires.
No sealing compound is need ed
to make con nec tions wa ter proof.
Wiring diagrams are provided
with the panel for making
connections. The size wire to use
from the panel to sump de pends
on motor size and distance in feet.
Be sure each wire is checked
out so that a wrong connection
will not be made. An ohm me ter
or Megger can be used to check
wire continuity.
Installing Switch Controls:
The controls are supported by a
mount ing bracket that is attached
to sump wall, cover, or to the
NEMA 4 junction box.
Control level can be changed
at any time by loosening
the snubber and readjusting
cord length.
In either a simplex or duplex
system, the lower or turn-off
control is set just above the top
of volute, so that the volute will
always be submerged during
the pumping cycle. The sec ond,
or turn-on control, is set about
24 inches above the lower
turn-off con trol.
NUMBER OF CONDUCTORS REQUIRED BETWEEN CONTROL PANEL AND NEMA 4 JUNCTION BOX
POWER LINES AND CONTROL WIRES CAN BE CARRIED IN CONDUIT OR CAN BE UNDERGROUND BURIED CABLE
System
Number of
Number of
Number of
Type
Control Wires
Power Lines
Ground Wires #8
Number of
Number of
Sensor
Wires
Ground
Wires
Simplex
4 3 1 3 1
Simplex
with
Alarm
6 3 1 3 1
Duplex
6 6 2 6 2
Duplex
with
Alarm
8 6 2 6 2
HEAT SENSOR & SEAL FAILURE
