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The heat exchanger circuit is connected to the pump outlet just
before the check valve with a pipe of appropriate size.
During pump operation, a part of the flow of the pump set circulates
through the heat exchanger to provide cooling for the diesel engine.
This flow does not contribute to the supply of the firefighting system
and must be considered in the hydraulic calculation and when
choosing the pump set.
For values of minimum flow required to pass through the heat
exchanger, refer to the performance curves of the pump set.
8
7
A
4
5
6
1
3
2
Heat exchanger
Pos.
Description
A.
Outlet of the cooling flow
1.
Isolating valve: Normally open
Bypass isolating valve: Normally closed
2.
The bypass line must only be used for
service purposes.
3.
Isolating valve: Normally open
Valve with hydraulic control: Normally closed
4
It opens when the motor starts.
5.
Flow regulator: To adjust the inlet flow to the exchanger
6.
Filter
7.
Heat exchanger with expansion tank
Pressure gauge with the optimum operational area
8.
indicated
12
Most of the heat is dissipated by the described cooling
system. Despite this, the running engine emits a certain amount of
energy in the form of heat into its environment. Therefore, it is
necessary to ensure that the ventilation openings are sized to
maintain the desired temperature in the room.
The following figure shows a possible solution:
Example of ventilation room
Related information
5.3 Connecting the recirculation circuits
10.2.2.5 Cleaning the circuit of the heat exchanger
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