MULTIQUIP ST6125G Manuel d'utilisateur Page 12
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PAGE 12 — ST4125G/ST6125G SUBMERSIBLE PUMP • OPERATION MANUAL — REV. #0 (11/18/10)
FLOAT SWITCHES
Mechanical Float Switch
Mechanically activated fl oat switches offer a reliable low
current control for dewatering applications.
How It Works
The mechanical fl oat switch control will turn ON (close)
when the fl oat tips 45° above -horizontal, indicating a high
level, and turns OFF (opens) when the fl oat switch drops
45° below horizontal. Reference Figure 4 and Figure 5.
Maximum pumping range is 120 degrees. See Figure 3
below.
Figure 3. Pumping Range (Float Switch)
Pumping Range
The pumping range of the pump is determined by the fl oat
switch tether cord. Use Table 2 as guide line to determine
your required pumping range. Pumping ranges are based
on non-turbulent conditions. Range may vary due to water
temperature and cord shape. Please note as the tether
length increases, so does the variance of the pumping
range.
PUMP
ON
60
60
120
PUMP
OFF
SUBMERSIBLE
PUMP
Table 2. Pumping Range
Tether Length
2 in.
5.08 cm.
4 in.
10.16 cm.
6 in.
15.24 cm.
8 in.
20.32 cm.
10 in.
25.4 cm.
12 in.
30.48 cm.
14 in.
35.56 cm.
16 in.
40.46 cm.
Pumping Range
6 in.
15.24 cm.
10 in.
25.4 cm.
14 in.
35.56 cm.
18 in.
45.72 cm.
22 in.
55.88 cm.
27 in.
68.58 cm.
31 in.
78.74 cm.
35 in.
88.9 cm.
Design Features
Float switch housings are constructed of high-impact,
corrosion resistant polypropylene with mechanically
activated, snap action contacts.
Suitable for most liquid environments.
Hermetically sealed.
Thick-walled non-corrosive PVC plastic enclosure.
Pressure tested to 30 ft. (9 meters).
Standard SJO, 16-gauge, 2 conductor cord (20 ft./6.09 m).
Figure 4. Float Switch (Closed)
Figure 5. Float Switch (Open)
ON/OFF
RAMP
STEEL
BALL
CONTACTS
CLOSED
ON/OFF
RAMP
STEEL
BALL
CONTACTS
OPEN
- MODEL ST4125G/ST6125G 1
- ST4125G/ST6125G 2
- Submersible Pump 2
- SAFETY INFORMATION 4
- ST4125G ST6125G 9
- ST4125G/ST6125G — COMPONENTS 11
- FLOAT SWITCHES 12
- CONTROL BOX INSTALLATION 15
- MOTOR WINDING CONFIGURATION 17
- Figure 9. Three Phase 19
- OPERATION 20
- MAINTENANCE 22
- TROUBLESHOOTING 25
- THREE PHASE WIRING 26
- CONNECTIONS 26
- HERE’S HOW TO GET HELP 28
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