Hydromatic S12L Series, Installation And Service Manual, Page: 4 / 16

4
In a duplex system the third or
override control is usually set
about 6 inches above the one
pump turn-on control.
In a triplex system the third or
override control is usually set 24
inches above the one pump
turn-on control, and the fourth or
second override control is 24
inches higher.
If an alarm system is used, this
control is usually set about 6
inches above the override control.
As described previously, some
engineers prefer to have the
alarm control set below the
override control.
Making Electrical Connections:
All electrical wiring must be in
ac cor dance with local codes, and
only
competent electricians
should make the in stal la tions.
Complete wiring diagrams are
glued to the inside cover of the
panel, and an additional set of
prints is included for use in
making the installation. All wires
should be checked for grounds
with an ohm meter or Megger after
the con nec tions are made. This is
important, as one grounded wire
can cause considerable trouble.
(See Fig. 1.)
IMPORTANT: If equipment is
not
properly wired and
protected as rec om mend ed, the
motor guarantee is void.
Heat Sensors and Seal Failure
Connections:
Be sure heat sensor wires are
con nect ed in series with the
starter coil. Con nec tions are
provided on the terminal strip. See
wiring diagram. If seal failure unit
is used, connect as shown with
seal failure system. If seal failure
unit is not used, the two seal
failure wires are left open. Do not
connect power to these lines at
any time. (See Figs. 2 and 3.)
Starting System:
1. Turn
H-O-A switch to
Off position and then turn on
main circuit breakers.
2. Open all discharge valves and
allow water to rise in sump.
3. Turn H-O-A switch to Hand
posi tion on one pump and
notice oper ation. If pump is
noisy and vibrates, rotation is
wrong. To change rotation,
interchange any two line leads
to motor 3ø only. Do not
interchange main incoming
lines. If duplex system, check
second pump in same manner.
4. Now set both H-O-A switches
to Auto position and allow
water to rise in sump until one
pump starts. Allow pump to
operate until level drops to
turn-off point.
5. Allow sump level to rise to
start other pump. Notice run
Fig. 1
HEAT SENSORS AND SEAL FAILURE CONNECTIONS
FOR ANY VOLTAGE MOTOR
ELECTRODE
HEAT SENSORS
IN MOTOR
WINDINGS
WHITE BLACK
HEAT SENSORS SEAL FAILURE
RED DARK
GREEN
Fig. 2
Fig. 3
DUAL VOLTAGE
3 PHASE MOTOR WIRING
230V 3ø 460V 3ø
GREEN GREEN
R
(L3)
W
(L2)
BL
(L1)
R
(L3)
W
(L2)
BL
(L1)
1 2 3
7 8 9
4 5 6
1 2 3
7 8 9
4 5 6
WARNING
BLACK
COIL
ON-OFF
SWITCH
L1
THERMOSTATS
IN SERIES
WHITE
L2
TWO WIRE CONTROL OFFERING AUTOMATIC RESET
THERMOSTATS
IN SERIES
WHITE
L2
BLACK
THREE WIRE CONTROL OFFERING AUTOMATIC RESET
L1
COIL OL
OL START
IN CERTAIN APPLICATIONS THE NEC MAY REQUIRE THREE OVERLOAD RELAYS
COLOR PURPOSE
DARK GREEN SEAL FAILURE
RED SEAL FAILURE
BLACK HEAT SENSOR
WHITE HEAT SENSOR
WARRANTY IS VOID IF HEAT SENSORS ARE NOT
CONNECTED AS SHOWN (IN SERIES WITH CONTACTOR OIL)
DESIGNATION FOR OPTIONAL
SEAL FAILURE & SENSOR CORD
See Wiring Diagram of seal failure
unit #4673 or 4674 for connecting
dark green and red wires. If seal fail-
ure unit #4673 or 4674 is not used,
leave dark green and red wires open.
Pump
Operations