ABB SCK - Page 122

122 Operating instruction SCK Gas Sampling System OI/SCK-EN Rev. E
Proceed as follows:
Step Procedure
1
Open the control cabinet.
2
Switch off the cooling-water pump at the motor breaker -F37
(1)
.
Note: You can also switch off the cooling-water pump at circuit
breaker -F36
(2)
.
3
Wait 5 minutes.
4
On the top of the heat exchanger: Unscrew cap on drain valve
and open vent cock (red) so that air can escape.
5
Close drain valve on heat exchanger again as soon as only cool-
ing water comes out of the drain valve.
6
Slowly open drain valve on the gas sampling probe.
7
Close drain valve on gas sampling probe again as soon as only
cooling water comes out of the drain valve.
8
Switch cooling-water pump -M51 on again at motor breaker -
F37
(1)
or at circuit breaker -F36
(2)
for approx. 20 s.
9
Wait 5 minutes, vent again.
10
Repeat step 8 through 9 if necessary until no more air comes
out of the cooling-water circuit.
11
Check pressure
of cooling water and top up if necessary (target
cooling water pressure in cooled state: 1-1.5 bar (1000-
1500 hPa)).
12
Close control cabinet again.
Note: Severe fluctuations of the cooling-water flow rate indicate that the
cooling-water circuit needs to be vented again.
Instructions: venting
the cooling-water
circuit