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8.1.2 Coupling of duty diesel pumps
DANGER
Automatic startup
Death or serious personal injury
‐
The fire pump set can start up automatically at any
time. If the system is not set as out of order, it is
mandatory to keep a safe distance from any of
its parts.
‐
Before any inspection, maintenance, service or repair
of the product, make sure that the mains switch is in
OFF position, locked and tagged. Attach suitable
isolation warning signs to prevent inadvertent
reconnection.
‐
In case of diesel-driven pumps, isolate the fuel supply
to the engine and disconnect the batteries by
removing the negative terminal connector, before
working on any part of the fuel supply or control
system.
DANGER
Trapping hazard
Death or serious personal injury
‐
Make sure that you wear suitable clothing on site. Do
not wear loose or frayed clothing, long free hair or
jewellry to avoid being trapped into the equipment.
‐
Do not place fingers, hands, arms, tools, etc. into any
opening.
Under no circumstances should the fire pump set be
operated, when the coupling guard is not in place and
suitably secured.
Check on a regular basis, if all screws are in place
and correctly tightened.
The coupling between the pump and diesel engine is operated
via cardan shaft. This kind of coupling do not require specific
alignment.
8.2 Priming the pumps
Before starting the priming operations, read
the installation and operation instructions.
WARNING
Electric shock
Death or serious personal injury
‐
Make sure that all protections and cover of the electric
parts are in place and secured.
CAUTION
Pressurised system
Minor or moderate personal injury
‐
Pay attention to the direction of the vent hole and
make sure that no person can be hurt by the
escaping liquid.
In the case of suction-lift installations, an automatic priming
device is provided and installed for each duty pump.
During commissioning and when necessary (for example, in case of
service), ensure correct priming of the pump. Refer also to the
documentation for the pumps supplied with the pump set.
The following procedure must be repeated for each pump in the
pump set.
1. Make sure that all the other pumps in the pump set are switched
off.
2. Close all shut-off valves on the outlet side of the pump and test
circuit (if present).
3. Open the inlet gate valve of the pump to prime.
4. Remove the priming cap and slowly pour water into the pump
until it is completely filled.
5. Put the cap back on and carefully close it.
6. Set the operating mode selector switch of the pump to
prime to MAN position and start the pump.
7. Vent the pump.
In some cases, it may be necessary to repeat the procedure
described above several times in order to completely purge the air
from the pumps.
8.2.1 Adjustment of the diesel pump speed
Changing the speed of the diesel pump can compromise
the proper functioning of the pump set and should only be
performed by qualified persons.
A low rotation speed implies a lower flow of water to the
heat exchanger and a possible engine damage due to
overheating.
The rotation speed of the diesel pump is fixed at the factory during
testing operations. It is possible to adjust the speed during the first
start-up to be able to better meet the demands of the plant, and for
this purpose, fasteners are provided on accelerator which limit the
adjustment possibilities.
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