Group Under The Charge Of Water; Group Over The Charge Of Water (Suction); Control Operating; Commissioning Of The Main Electric Pump - Wilo SiFire EN Série Notice De Montage Et De Mise En Service

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• Before turning on the main pumps, check the cor-
rect motor-pump alignment. Respect operation
from the specific manual delivered with pumps.
The motor-pump alignment operations must be
performed by skilled persons.
• If the group is provided with pumps placed on a
separate base frame, each base frame must be
fixed to the ground, with a special attention to the
alignment of the discharge manifolds.
• The installation must be performed by qualified
technicians.

8.2 Group under the charge of water

For the commissioning of a system installed under
the charge of water, perform the following opera-
tions:
• Check that the air ventilation valve of each pump
is open.
• Close valves on the discharge side of the pumps.
• Slowly open the valves on discharge side and
check if water is coming out from the air ventila-
tion circuits of each pump.
• Briefly start pumps by using the manual mode.
• Make sure air is not present in circuits and pumps.
• Repeat the operation until to be sure that all the
air in the pipe is eliminated.
• Close the ventilation plug of the jockey pump.
• Completely open the valves on the suction and
discharge.
• Make sure there are no problems of water flow
(presence of dirt, solids, etc).

8.3 Group over the charge of water (Suction)

For the commissioning of a system installed above
the level of water charge, perform the following
operations:
• That the ventilation valve of each pump is open.
• Close valves on the discharge side of the pumps.
• Fill the main pumps through circuits from priming
tanks.
• Fill the jockey pump through the filler cap by fol-
lowing instructions given the instruction manual.
• Briefly start pumps by using the manual mode.
• Make sure air is not present in circuits and pumps.
• Repeat the operation until to be sure that all the
air in the pipe is eliminated.
• Completely open the valves on the suction and
discharge.
• Make sure there are no problems of water flow
(presence of dirt, solids, etc).
38

8.4 Control operating

8.4.1 Commissioning of the main electric pump

• Make sure all hydraulic, mechanical, and electrical
connections, indicated in this manual, are cor-
rectly done.
• Make sure the valves at the suction and discharge
side of the pump are open.
• Make sure the pump is primed and filled with
water.
• Check that the power supply matches with the
one reported on the label and that three-phase
power supply is connected.
Follow commissioning instructions with help of
each manual of electric pump box.
CAUTION! Risk of product damages!
In order to avoid overheating risking to damage
main pumps, always check through recirculation
circuit that the water flow is in accordance with
instructions on technical manual of the pump. If
troubles appear concerning recirculation circuit
or if the minimum level necessary for testing
start-up and pump running is not guaranteed,
provide to open other circuits (for example, the
flow meter, valve for testing the tightness of
gate valve, drain valve, etc)
CAUTION! Risk of product damages!
Make sure that none of the following points
exist. Otherwise, immediately stop the pump
and remove malfunctioning causes before start-
ing it again (also refer to chapter faults, causes
and solutions):
• Rotating parts in contact with fixed parts
• Unusual noises and vibrations
• Loose bolts
• High temperature on motor housing
• Differences in current at each phase
• Leakages on mechanical seal
Vibrations, noise and excessive temperatures
could be due to misalignment of motor/pump
coupling.

8.4.2 Commissioning of the main diesel pump

• Make sure all hydraulic, mechanical, and electrical
connections have been made as indicated in this
manual.
• Make sure that valves on suction and discharge
side of the pump are open.
• Make sure the pump is primed and full of water,
and drain air by using the tap on the pump hous-
ing.
• Check if the supply voltage is in accordance with
data reported on the label and if it is present.
• Make sure the fuel is compatible with engine
functioning, then that the fuel tank is full of fuel
(the fuel level inside the tank can be seen via the
pipe gauge near to the tank).
• Make sure that connections are correctly made
with pipes, without any connection between the
tank and the engine
• Make sure the electric float cable of tank is cor-
rectly connected to the electrical control panel of
the diesel pump.
WILO SE 12/2019