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The pictures below give an indication of the minimum free space
to be left around the pump set.
A
A
•
A: Minimum 800 mm
Top view of the installation room
B
•
B: Minimum 2400 mm
Side view of the installation room
When sizing room openings for effective air exchange,
also consider the place of installation and the presence of
other machines or heat sources in the same room.
The installation of motors and engines in closed environments
always requires proper circulation of fresh air in the room in order to
ensure elimination of heat generated during operation and
adequate cooling of the machines.
Openings and ventilation ducts for hot air evacuation should be
dimensioned based on analytic calculation.
•
Large openings must be protected in order to
prevent people or animals from entering.
•
Use unbreakable protection that cannot be removed
without tools.
Related information
13.1 Operating conditions
4.2 Diesel pumps with direct air cooling
A fan, driven by the engine itself, generates air flow that is
conveyed to the engine and ensures cooling. The heat is then
released into the environment and must be extracted from the
room.
4.3 Diesel pumps with water/water heat exchanger
In the Hydro EN pump sets, the cooling of liquid-cooled engines is
provided by a water/water heat exchanger with an expansion tank.
A
When the engine is warm, a pressure, which will cause hot liquid to
be discharged by extreme forces, is created in the cooling circuits.
This results in a danger of burning. The cooling circuits may remain
hot and pressurized even after the engine has been shut off.
The engine is cooled by the water of the firefighting system.
The heat exchanger cooling system has the following parts:
•
a water/water heat exchanger with expansion tank
•
a manometer with indication of the operational area at the inlet
of the expansion tank
•
a circuit consisting of a filter and a valve with hydraulic control
and pressure regulator
•
a bypass circuit with gate valve.
WARNING
Hot surface
Death or serious personal injury
‐
Open the coolant tank cap only when the engine is
cold and only if strictly necessary.
Do not let the engine run at a speed lower than the
nominal speed. A low speed rotation may cause an
insufficient cooling flow of water through the heat
exchanger and a possible engine damage due to
overheating.
Do not restrict or block the outlet of the heat exchanger.
Avoid long and tortuous routes that can restrict the flow of
passage water. Do not fit any component in the outlet pipe
(gate valve or other) that can affect the proper circulation
of cooling water.
Install the outlet pipe of the heat exchanger to visually
inspect the effectiveness and correctness of water
circulation.
The heat exchanger outlet must be installed close to the
diesel pump.
Clean the filter regularly, and make sure that there is
proper water circulation in the cooling system.
Make sure that the flow through the cooling system meets
the minimum requirement as specified in the technical
documentation for the specific model.
The outlet of the heat exchanger must be connected to
the drain pipe with a flexible joint to avoid any mechanical
stress on the heat exchanger.
11
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