WÄRTSILÄ Vasa R22, Instruction Manual

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3 The valve is jamming.
Clean the valve.
c) Too low temperature at high load
1 Defective thermostatic element(s) (the element(s) will
not go back to cold position).
2 Jamming valve. Clean the valve.
3 The valve is not closing correctly. Check adjustment ac-
cording to pos. d) below.
d) Too high temperature at high load
1 Cooling is insufficient. Check the temperature after the
central cooler. Check that the valve is fully open. Utilize the
indicator pin (18).
2 Defective low temperature element. Change the ele-
ment.
3 Check that the piston (3) is in low temperature position,
utilize the position of the screw (2).
4 If the position piston (3) is in wrong position, check pres-
sure (14) before the cylinder.
5 If there is no pressure,
the valve is jamming. Open and
clean the valve.
6 If there is pressure, the position control system is faulty.
7 If the pressure disappears when opening the connection
(14) the drain hole of the three-way valve (2), Fig 19-5, can be
clogged. Clean the drain opening.
8 If the air flow does not stop, check the switch (3), Fig 19-
5.
9 If the switch is intact, clean the three-way valve (2), Fig
19-5, or change if damaged.
19.4.2.3 Adjustment of the valve
For correct closing position, adjust as follows:
1 The air supply to the valve should be shut off and drained
before adjusting the valve.
2 The temperatures of the valves must not exceed 25°C
when adjusting. This is to guarantee that the low temperature
elements are completely compressed.
3 Remove the screw (11).
4 Turn the adjusting nut (1) clockwise until the indication
pin (18) starts moving. Then turn the adjusting nut counter
clockwise about one turn.
5 Mount the screw (11) in the nearest hole to lock the ad-
justment.
22-9601 Cooling Water System 19
VASA 22 19 - 13