BOWMAN EC120 - Cleaning; End Cover Screw Tightening Sequence; Draining any Condensate in the Body of the Cooler

5.3 Cleaning
Whilst we strongly recommend that mechanical and chemical cleaning of the heat
exchanger is carried out only by specialised companies, below are some general guidelines
that may be useful;
a) Removing the end covers allows access to the tube stack, which can be removed
from the heat exchanger body.
b) Wash the tube plates and tubes using a hand held hose or lance. An industrial steam
cleaner can also be used if available.
c) Tube brushes can be used to clean through each tube to aid removing stubborn
deposits. Small diameter rods and brushes for tube cleaning are available
from companies such as ; Easy Products www.easyproducts.com or Rico Industrial Services
www.ricoservices.co.uk
d) Detergents or chemicals suitable for use with the tube material* can be used if
fouling is severe. Allow time for the detergent or chemical cleaner to work, before hosing
down with plenty of water. *Please refer to the spare parts list for details of the tube materials.
e) The tube stack should be ushed through with clean water to remove all traces
of cleaning chemicals/detergents. If necessary, the cleaning uid should be neutralised.
f) When retting the end covers after cleaning, new ‘O’ seals must be used.
5.4 End cover screw tightening sequence
End covers must be retted in their original orientation and tightened to the torque
gures below, to ensure correct performance.
Cooler Series Screw Size Torque (Nm) Cooler Series Screw Size Torque (Nm)
EC M6 8 GK M12 54
FC M8 22 JK M16 95
FG M8 22 PK M16 130
GL M10 37 RK M16 130
5.5 Draining any condensate in the body of the cooler
Moisture can condense from the air and collect in the charge air cooler. There are drain
plugs which can be removed to allow condensate in the body of the cooler to drain.
If mounting the cooler vertically, always ensure there is a means of draining any
condensate from the unit.
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Take Care