Water System - Atlas Copco PTS 916 Cd Instruction Manual

PTS 916 Cd
In case of internal fuel supply, fuel from the fuel tanks (FT) is
circulated by the engine fuel pump (FP
through a 3-way valve (TWV) to two primary fuel filters (FF
The fuel then passes through the secondary fuel filters (FF
enters the engine (E).
The fuel, which is not used by the engine to combust, returns via
the air-cooled fuel cooler (FC) and the 3-way valve to the fuel
tanks.
Normally the primary fuel filters are in parallel. By means of the
fuel shut-off cock (FSC), seated on the housing of the filters, one of
the filters can be shut off when it has to be serviced. This can even
be done while the engine is running.
Do not put the fuel shut-off cock in the lowered
!
position (the handle pointer points up) when the
engine is running, because both filters will be shut off
and no fuel will flow to the engine.
An electrical priming pump (EPP) is comprised in the system to fill
up filters and fuellines after maintenance and servicing. A
description of this procedure can be found on page 45.
Instead of internal fuel supply via the fuel tanks, external fuel
supply is possible.
The u²nit must be stopped before switching from the
!
internal to an external fuel source.
When using external fuel, both the supply and the return hose must
be connected to the external fuel supply couplings (EFC).
No restrictions are allowed in those hoses.
Take the necessary precautions to keep the fuel return hose opened
and connected, while the unit is running.
Check that the primary fuel filters are not both shut off.
Restart the unit.
20
). The fuel is pumped
E
).
P
) and
S

2.9 Water system

E
E Engine
F Cooling fan 1 (RAD, IC, AC
1
RAD Radiator
TT Top tank (radiator)
RAD
WP Engine water pump (radiator)
E
The water system contains a coolant flow to cool the engine's
cylinders.
The coolant is circulated by the engine water pump (WP
on the back of the engine (E). When the coolant returns from the
engine, it passes through the radiator (RAD), which is air-cooled by
the cooler fan (F ).
1
The radiator top tank (TT
RAD
and gives the coolant in the system room to expand.
Radiator
RAD
F
1
, OC)
1
E
) supplies the coolant to the system
Preliminary
), seated