Connecting The Cooling System; Exhaust System - Grundfos Fire HSEF FM Europe Series Installation And Operating Instructions Manual

6.7 Connecting the cooling system

Water-cooled diesel engines are cooled by a flow of water
through a pipe connected to the heat exchanger via a cooling
circuit.
The cooling circuit consists of the pipework with both a main pipe
and a bypass pipe, isolating valves, pressure reduction valves,
filters, a pressure gauge as well as a solenoid valve.
See figs. 17 and 18.
Fig. 17 Cooling circuit with bypass
Install a pipe on the discharge side of the heat exchanger.
See fig. 18. The nominal diameter of the pipe must not be smaller
than the outlet of the heat exchanger (1 1/4" or 1 1/2").
Fig. 18 Heat exchanger with flow switch
6.7.1 Minimum pressure
To ensure correct cooling of the motor, there must be the below-
mentioned pressure after the dirt trap.
Type
Cooling water returned to storage tank
6.7.2 Filter in cooling circuit
The isolating valves in the bypass pipework are closed during
normal operation. Only open the valves if the filter in the main
pipe is fouled and thus keeps the cooling water from cooling the
motor. A fouled filter will result in lack of pressure on the pressure
gauge.
12

6.8 Exhaust system

Note This section applies to pump sets with diesel engine.
Warning
Exhaust must be directed safely to the open air
through the exhaust system.
Exhaust must not escape indoors. Operation without
an exhaust system is not safe.
Warning
Make sure that persons cannot accidentally come
into contact with hot exhaust pipes.
Warning
When welding the engine exhaust pipe to the main
exhaust pipe wear, use the following: protective
gloves, protective clothes suitable for the work, an
approved safety helmet for welding and safety
shoes.
Install the exhaust pipes as straight and with as few bends as
possible. Install the supplied silencer horizontally after the first
90 °-bend seen from the engine outlet.
Arrange the exhaust system so that no condensation water can
enter the engine. Attach the exhaust system to the building.
Connect the exhaust pipe to the flexible exhaust port of the
engine. The exhaust port is covered for transportation by a plastic
plug which must be removed before connecting the exhaust pipe.
See arrow in fig. 19. The flexible connection on the engine must
not be used to compensate for misaligned pipework.
Warning
The exhaust flange seal must be mounted and the
flange must be tightened to 220 Nm.
Retighten all flange bolts after commissioning and
cooling down
The minimum diameter of the exhaust pipes must not be smaller
than the exhaust port of the engine.
The diameter of the exhaust pipes depends on the
pipe length, the type and number of silencers and the
bends, as all will affect the flow resistance. In order
not to exceed the exhaust counterpressure specified
Note
by the manufacturer of the diesel engine, it may be
necessary to use pipes with a nominal diameter one
or two sizes larger than the engine outlet.
Pressure
[bar]
2.0
Fig. 19 Exhaust port of the engine
The exhaust port is installed with ANSI B 16.5
Note
exhaust flanges