WÄRTSILÄ PAAE051728, Инструкция по эксплуатации

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9 Mount all screws (18), (30) and (35) of the air cooler,
see Fig 15-6 and Fig 15-7, and tighten these according to
chapter 07. Remove the lifting tool.
10 Mount the studs
and lift the air inlet box (16) into posi-
tion, see Fig 15-5.
11 Mount the air inlet box (17),
but do not tighten it before
all the nuts (15) are hand tightened.
12 Tighten the nuts (14) and (15) on the air inlet boxes
to
torque according to chapter 07.
13 Tighten the screws (13).
14 Mount the electrical equipment.
15 Fill the cooling system with water
16 Vent the air cooler
and check the tightness of the seal-
ings at engine start-up.
15.5.6 Charge air pressure difference over air cooler
The charge air cooler maintains the thermal load of the diesel
engine at a correct level. This is very important for keeping fuel
consumption and operating costs down.
An increasing pressure drop (
D
p) over the charge air cooler (on
the “air side”) causes an increasing thermal load and increasing
fuel oil consumption.
By constant measuring of the
D
p over the charge air cooler, the
condition of the charge air cooler can be evaluated, and the air cooler
can be cleaned or changed to a spare air cooler at the right time.
D
p over clean charge air cooler [mmH
2
O]/[mbar]
Engine type Single stage
cooler
Two stage
cooler
Alarm limit
6L and 12V 215/21 255/25 765/75
8, 9L, 16V and 18V 490/48 530/52 765/75
The pressure difference over the air cooler can be measured by
using an u-tube manometer, see Fig 15-12.
1 Disconnect pipes
from the pressure difference
transducer (PDT 623).
2 Connect the water filled u-tube
to the pipe unions.
3 Measure the pressure difference
by using a measuring
tape.
15 Turbocharging and Air Cooling 32-200549-10
15 - 18 WÄRTSILÄ 32