Zoeller FLEX 540 - Zoeller FLEX Sump Pump Performance and Troubleshooting; Performance Curve and Data; Troubleshooting Guide

6
155980
PERFORMANCE CHARACTERISTICS
CONDITION POSSIBLE CAUSE REMEDY
A
PUMP WILL NOT START OR
RUN
Inadequate incoming water pressure. Check incoming water line for closed valve, low water
pressure or clogged lter/strainer.
Excessive incoming water pressure. Install regulator and reduce pressure below 100 PSI with
valve closed.
Debris around intake. Clear debris from pit and foot valve strainer.
Float hung up on pit or primary pump Move pumps so that the oats move freely and do not
contact pit, piping or each other.
Control valve is under tightened Control valve adjustment on page 4.
B PUMP STARTS TOO SOON Float valve is positioned too low. Refer to STEP 3.
C PUMP WILL NOT SHUT OFF
Float is obstructed. Inspect oat operation and correct problem.
Internal valve diaphragm vent hole is
plugged with debris.
Turn off water supply to pump and back on repeatedly
to dislodge debris. If this process does not remedy the
problem, service pump to clear debris or replace valve
assembly.
Control valve is overtightened Control valve adjustment on page 4.
D
PUMP OPERATES BUT
DELIVERS LITTLE OR NO
WATER
Debris around intake. Clear debris from pit and foot valve strainer.
Inadequate incoming water pressure. Check incoming water line for closed valve or low water
pressure.
Blockage in discharge pipe. Remove pipe and ush out debris.
Foot valve above water level. Adjust oat - Refer to STEP 3 on page 3.
Vertical lift too high. Change discharge piping or contact technical service.
Troubleshooting Guide
© Copyright 2020 Zoeller
®
Co. All rights reserved.
Pump capacity varies due to: Inlet water pressure, working water pressure, discharge
elevation, number of pipe ttings, inlet and outlet pipe size, uid viscosity, degree of water
clarity, water temperature. The ow rates in the chart are approximate values.
NOTE: Some districts may require a reduced pressure principle backow preventer per ASSE
Standards 1013. Check local codes.
Sump water is non-potable. To reduce the risk of contamination of the
potable water supply, the FLEX
™
must be installed with a listed backow
device suitable for the installation, in accordance with the local plumbing code, such as a
reduced pressure principle backow preventer (RP). Alternately, consult the local plumbing
and health codes or the authority having jurisdiction for guidance on cross-connection and
backow protection requirements.
TOTAL DYNAMIC HEAD/FLOW
PER MINUTE
DEWATERING ONLY
TOTAL DYNAMIC HEAD
FLOW PER MINUTE
15
LITERS
0
GALLONS
20 40
5 10
0
2
5
25
8060
20
PUMP PERFORMANCE
CURVE
MODEL 540
FEET
METERS
4
10
15
6
45
30
25
20
40
35
8
10
12
14
40 PSI
60 PSI
80 PSI
TOTAL DYNAMIC HEAD/FLOW
PER MINUTE
DEWATERING ONLY
MODEL
540
40 PSI 60 PSI 80 PSI
Feet Meters Gal.
Liters
Gal.
Liters
Gal.
Liters
5 1.5 12.7 48.1 19.0 72.0 20.0 75.7
10 3.0 12.7 48.1 19.0 72.0 20.0 75.7
15 4.6 7. 4 28.0 15.0 56.8 20.0 75.7
20 6.1 2.0 7. 6 11. 1 42.0 20.0 75.7
25 7. 6 - - 7. 1 26.9 15.3 57.9
30 9.1 - - 3.2 12.1 10.9 41.3
35 10.7 - - - - 6.4 24.2
40 12.2 - - - - 1.8 6.8
Shut-off Head:
22.0 ft. (6.7m) 34.0 ft. (10.4m) 42.0 ft. (12.8m)