Wilo FLA Compact-1 Helix V16, Installation And Operating Instructions Manual

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English
Installation and operating instructions Wilo-FLA Compact 33
• After setting the pressure switch, secure it against
unauthorised adjustment (e.g. sealing).
The pressure switch of type FF4 is designed as a
single-pole changeover contact. The switch con-
tact is wired at the factory to open when the pres-
sure drops and close when the set pressure is
reached (the pump runs with the switch contact
open).
8.1.1 Default values for the pressure switch
H(Q0) … zero-delivery head of the system
H(geo)… geodesic head difference between
highest fire hose reels and FLA Compact
DS..A … switch-off pressure of the relevant
pressure switch(..)
DS..E … start-up pressure of the relevant
pressure switch(..)
Setpoint… specified operating pressure of
FLA Compact
NOTICE!
H(Q0) can be found in the enclosed test report
for the FLA Compact.
FLA Compact-1 (Fig. 2a):
Start-up pressure = setpoint
Switch-off pressure = H(Q0) – 0.5 bar
Example: H(Q0) = 75 m (~7.5 bar)
Setpoint = 6 bar
H(geo) = 20 m (~2.0 bar)
FLA Compact-2 (Fig. 2b):
H(Q0) > DS1A ≥ DS2A > DS1E ≥ DS2E ≥ DS3A >
DS3E
NOTICE!
The default value for pressure switch 3 ON
depends on the system’s hydraulic ambient varia-
bles; however, it should be within the limit values
“min” and “max” in Table 5.
Example: H(Q0) = 75 m (~7.5 bar)
Setpoint = 6 bar
H(geo) = 20 m (~2.0 bar)
Pressure switch 1 (item 12)
ON
DS1E OFF
DS1A
Setpoint H(Q0) – 0.5 bar
Table 4
Pressure switch 1
DS1E DS1A
6.0 bar 7.0 bar
Pressure switch 1 (item 12a) Pressure switch 2 (item 12b) Pressure switch 3 (item 12c)
ON
DS1E OFF
DS1A ON
DS2E OFF
DS2A ON
DS3E OFF
DS3A
Setpoint H(Q0) – 0.5 bar DS1E DS1A
min.: H(geo) + 0.5 bar
max.: Setpoint – 0.5 bar
DS2E
Table 5
Pressure switch 1 Pressure switch 2 Pressure switch 3
DS1E DS1A DS2E DS2A DS3E DS3A
6.0 bar 7.0 bar 6.0 bar 7.0 bar 2,5 … 5,5 bar 6.0 bar