5
Installing 3900 Mercury
Switch Controls:
The controls are supported by a
mounting bracket that is attached
to sump wall or cover or to the
NEMA 4 junction box.
Cord snubbers are used to hold
the cord in place. Control lever
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 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 6 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.
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 ohmmeter or Megger after
the connections are made.
This is
important, as one grounded wire
Pump
Operations
can cause considerable trouble.
(See Fig. 1.)
IMPORTANT: If equipment is
not properly wired and protected
as recommended, the motor
guarantee is void.
NOTE: For wiring diagram for
wye delta see Addendum
S4LRC-701.
Heat Sensors and Seal Failure
Connections:
Be sure that heat sensor wires are
connected in series with the
starter coil. Connections 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 the H-O-A switch to
Off position, then turn on main
circuit breakers.
2. Open all discharge valves
and allow water to rise in
sump pump.
3. 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 motor on 3ø only. DO NOT
INTERCHANGE MAIN
INCOMING LINES. If duplex
system, check second pump in
the 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
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.
Fig. 3
Содержание Hydromatic S4LRC-3450 RPM
Страница 11: ...11 Wiring Diagrams...