Multiquip submersible pumps px400 - Manual (Page 15)

cx400/px400 Sub. pump • operation and partS manual — rev. #1 (12/03/10) — page 15
Float Switches
For unattended operation of the submersible pump two float swith methods can be used single or dual. The single float
switch (Model SW1A) will allow the pump to turn on and off depending on the length of the tether. When using the dual
float switch (Model SW2A) method the pump will turn on or off at a pre-determined water level. This water level is set by
the length of the tether.
NOTICE
Single float switch, Model SW1A has a pumping range
between 5.5~18 in. (14~46 cm.). Dual float switch has
a pumping range between 1~ 48 in (2.54~122 cm.)
flOat switches
mounting the Float Switches
1. Determine the required cord tether length as shown
in Figure 5 and Table 3.
2. Place the cord into the clamp as shown in Figure 8
and Figure 9
3. Secure the clamp to the discharge hose as shown in
Figure 8. do not install cord under hose clamp.
4. Using a screwdriver, tighten the hose clamp. do not
over- tighten. Make sure the float cord is not allowed
to touch the excess hose clamp band during operation.
Figure 8. Single Float Switch Application
PUMP
AC POWER
CABLE
PUMPING
RANGE
SINGLE
FLOAT SWITCH
APPLICATION
MODEL SW1A
3.5 in. (9 cm.)
MINIMUM
TETHER
LENGTH
PUMP
ON
PUMP
OFF
GREEN
BLACK
EXTERNAL
1Ø 115 VAC, 60 Hz
POWER SOURCE
CIRCUIT
BREAKER
L
N
WHITE
GND. BUS
DISCHARGE
HOSE
SUBMERSIBLE
PUMP
INPUT POWER
TO CONTROL BOX
FLOAT SWITCH
CABLE
PIGGGY-BACK
PLUG
PUMP
AC POWER
CABLE
PUMPING
RANGE
DUAL
FLOAT SWITCH
APPLICATION
MODEL SW2A
3.5 in. (9 cm.)
MINIMUM
TETHER
LENGTH
PUMP
OFF
PUMP
ON
GREEN
BLACK
EXTERNAL
1Ø 115 VAC, 60 Hz
POWER SOURCE
CIRCUIT
BREAKER
L
N
WHITE
GND. BUS
DISCHARGE
HOSE
SUBMERSIBLE
PUMP
FLOAT SWITCH
CABLE
PIGGGY-BACK
PLUG
GRAY
BLACK
Figure 9. Dual Float Switch Application