Container Leak Test; Ca+ Flushing - Maersk Container Industry Star Cool SCI-20 Operating And Service Manual

20.12 Container leak test

When using the CA system, the box must conform to leak rates in order to maintain control of the
O and CO setpoints. The minimum box requirement is a pressure of 500Pa/2" to 250 Pa/1" for 8
2 2
minutes or more. It is recommended that it is checked prior to the stuffing. Please see point 5 and 6.
A container leak test needs to be performed:
• After replacing wiring going through the unit
• After replacing hoses and/or piping going through the unit
• After repairing structural damage on the unit and/or container
• After replacing air
• When a container is suspected of leakage
Equipment needed:
• Star Cool test damper
• Test manometer - differential pressure gauge (for instance a Dwyer Magnehelic model 2002)
• CA curtain
• Drain plugs
Method:
1. Install drain plugs.
2. Install CA curtain properly.
3. Install Star Cool test damper.
4. Connect test manometer.
5. Apply air pressure 500 Pa/2" water column.
6. The air pressure shall remain above 250 Pa/1" water column for minimum 8 min.
7. Close air supply, and perform leak search (with soap water) at the container front and end.

20.13 CA+ flushing

For cargo with low respiration rates, the container must be flushed with nitrogen and carbon dioxide
after stuffing.
Liquid or dry nitrogen can be used for this process. However, when using liquid nitrogen, it is vital to
use an evaporator between the nitrogen tanks/bottle and the container inlet in order to avoid freez-
ing damage to the cargo.
1. Check that a CA flushing damper is available (item no. 818251B). If the damper is not available,
it is possible to use the injection ports found on some unit models. Skip to step 6 if using the
injection ports.
2. Press to enter the Service menu. Select line S01 Manual operation. Then change line M01
Operating mode to MANUAL.
3. Remove the original air ventilation damper from the unit.
4. Install the damper for CA flushing (item no. 818251B).
5. Return the unit to Automatic mode. Press
Manual operation. Then change line M01 Operating mode to AUTO.
6. Press to enter the Operation menu and change line O13 to ON. This overrides any auto-
matic vent opening in case of out of range gas levels for 4 hours. A countdown clock will be
visible in the main display. The unit will automatically go into Normal mode when the time limit
is reached.
valve and/or module
exchange
to enter the Service menu. Select line S01
Operating and service manual
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