Alfa Laval PureBallast 135 Compact USCG, System Manual

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3.6.2 Ballast process
The ballast process and sub processes are illustrated and described below.
Note that the process can be stopped at any time.
3.6.2.1 Ballast start-up
Purpose : To warm UV lamps under controlled conditions before water treatment.
1
Operator starts the process from the control
system. Valves leading flow to and from
PureBallast are opened.
2
Component activities:
• - Open V201–19 and control valve
(V201-8) to 50 %.
- Wait 5 seconds to ensure wet condition.)
- If UV reactor is empty (indicated by level
switch LS201–29): Open V310–1 until UV
reactor is filled. Wait 10 seconds to ensure
wet condition.
3
Power management
Automatic power request from PureBallast to
vessel’s power management system (if
integrated).
4
UV lamp warming
Component activities:
• Activate UV reactor cooling: If UV reactor
temperature is above 45 °C (p225), V310–
1 is opened to cool the UV lamps. Valve is
closed when temperature is below 45 °C.
• Start UV lamps (100 %).
• Start counter: UV lamp runtime.
5
Ballast water pump request
After 90 seconds (p210) after all UV lamps
are lit: Request from control system to start
ballast water pump (outside PureBallast
system).
6
Ballast water pump started by operator and
confirmed in control system. If not confirmed
within 20 seconds, lamp power is reduced to
50 %. If not confirmed within p141 (including
the 20 seconds), process is stopped.
200000695-1-EN-GB 100
3 Operating instructions and control system description EN