Maintenance - Wilo SiFire Easy Série Notice De Montage Et De Mise En Service

open the valve (pos. 1 of Fig. 10) to complete and
restore the circuit pressure. Then follow pump's
switchgear instructions to verify the correct func-
tioning of automatism.
CAUTION! Risk of product damage!
In order to avoid overheating which can damage
the main pumps, always check that the water
flow through the recirculation circuit is fitting
with requirements of the pump's technical data
sheet. If there are problems in the recirculation
circuit or if the minimum flow level used to test
the start and the running of the pumps is not
guaranteed, open other circuits (for example the
flow meter, the valve for testing the tightness
of the gate valve, the drain valve, etc).
CAUTION! Risk of malfunction!
Before leaving the installation and/or after a
manual stop, remember to switch the system to
automatic mode (refer to the chapter about the
switchgear).
OTHERWISE THE FIRE EXTINGUISHING SYSTEM
IS NOT ACTIVATED.
CAUTION! Risk of malfunction!
If the pressure in the system has not recovered
to the starting level of the main pump switches,
refer to the chapter about the switchgear to
start the pump manually.
Test of the automatic start with float switch
(electric pumps with suction)
• Empty the priming tank (or simulate the effect) to
start the electric pump through the float signal.
• Then follow pump's switchgear instructions to
check the correct functioning of automatism.
Pump with diesel engine
Before testing, make sure that the return circuit in
the tank is closed and the main circuit pressure is
sufficient to avoid accidental starting of the
pump.
Then follow the pump's switchgear instructions to
activate the automatic mode only for the diesel
pump.
Automatically start the unit by using one pressure
switch at a time to check the correct operation of
both switches. Close the valve (pos. 1 of Fig. 10)
and open the drain valve (pos. 2 of Fig. 10) to start
the pump.
Then follow pump's switchgear instructions to
verify the correct functioning of diesel pump
automatism.
Close the valve (pos. 2 of Fig. 10) and open the
valve (pos. 1 of Fig. 10) to complete the test and
restore the circuit pressure.
CAUTION! Risk of product damage!
In order to avoid overheating which can damage
the main pumps, always check that the water
flow through the recirculation circuit is fitting
with requirements of the pump's technical data
Installation and operating instructions Wilo-SiFire Easy
sheet. If there are problems in the recirculation
circuit or if the minimum flow level used to test
the start and the running of the pumps is not
guaranteed, open other circuits (for example the
flow meter, the valve for testing the tightness
of the gate valve, the drain valve, etc.).
Automatic start test with float switch (diesel
pump with suction)
Empty the priming tank (or simulate the effect) to
start the electric pump through the float signal.
Then follow pump's switchgear instructions to
verify the correct functioning of automatism.
CAUTION! Risk of malfunction!
If the pressure in the system has not recovered
to the starting level of the main pump switches,
refer to the switchgear manual to start the
pump manually.

9 Maintenance

The fire extinguishing system is a safety equip-
ment that protects objects and people, therefore
possible modifications and repairs that affect its
efficiency must be made so as to minimise the 'out
of order' state.
Isolate pumps one at a time by the selector
switches of the switchgear and the stop valves
provided for this purpose.
Prohibit access to the pump room to unauthor-
ised persons.
WARNING! Risk of personal injury!
People must always wear personal protective
devices. Maintenance must be performed ONLY
by qualified personnel. In case of lack of instruc-
tions, always contact the supplier or expert
staff.
Never work alone when the presence of more
than one person is required.
Do not remove the protection on any rotating
parts, belts, hot surfaces etc. Never leave tools or
disassembled parts of the unit on it or around it.
Do not remove the protection of live parts; pre-
vent every possibility for operate any element
that isolates the installation or subassemblies to
be maintained.
CAUTION! Risk of product damage!
The pressure boosting system is NOT equipped
with an emergency stop. The main pumps can
only be stopped manually by switching off the
switchgear.
FOR THIS REASON BEFORE MAKING AN INTER-
VENTION ON PUMPS, BE SURE TO BE IN POSSES-
SION OF THE OPERATION KEY (IF EXISTING) OF
THE AUTOMATIC/MANUAL SWITCHES.
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