T-340
5–6
d. DELAY
In DELAY mode, the operation of the eAutoFresh system will be delayed for a set amount of time. This allows time
for the cargo to reach set point. In DELAY mode, the eAutoFresh vent will open to the stored (FLO) value when the
return air temperature sensor (RTS) is at or below set point plus the return offset value (rtn) or the delay time (tIM),
whichever comes first. The eAutoFresh vent will be fully closed when return air temperature is greater than the set
point plus the offset temperature (rtn).
To set the unit in Delay mode, scroll until “DELAY” appears in the left window, press the ENTER key to activate the
submenu. The first selection is the amount of time (tIM) for the delay. Select the amount of time for the delay by using
the UP and DOWN arrow keys. The range is from 1 to 72 hours in 1 hour increments. Press the ENTER key to set the
value and move to the FLO rate. Use the UP or DOWN arrow key to scroll to the desired FLO rate. The range is from
0 to 220CM (0 to 129CF) in increments of 5 and 3 respectively. Press the ENTER key to set the value and move to
the return temperature offset. Use the UP or DOWN arrow key to scroll to the desired rtn rate. The range of offset is
from 0.6°C to 2.8°C (1.0° F to 2.8° F) in 0.1° increments. Press the ENTER key to set the value and begin operation.
e. GAS LIMIT (gASLM)
In GAS LIMIT mode, access to the submenu is available provided a perishable set point has been selected, and a
valid reading is detected from the CO
2
sensor. In “Gas limit” mode the microprocessor will monitor and limit the
level of CO
2
in the container by opening and closing the eAutoFresh vent. The vent will open to the (FLO) setting
once the unit has completed initial temperature pull down or if the cargo temperature is within 5°C of set point and
the CO
2
level has reached the max limit or if the O
2
level has reached the lower limit. After the first 15 minutes of
the vent opening the controller will again evaluate the level of CO
2
, and/or O
2
levels. If after the first 15 minutes the
gas limit values are satisfied, the vent will close, if either gas limit has not been satisfied within 15 minutes the air
exchange vent will open in 10 CMH increments every 15 minutes until both gas concentrations are satisfied. Once
all limits are satisfied the vent will return to the closed position. If conditions are not met with the slide open 100%
for 90 minutes AL29 will be activated.
To operate in GAS LIMIT mode, scroll until gASLM appears in the left window, and press the ENTER key to acti
-
vate the submenu. The first selection is the maximum CO
2
level (CO2LM). Select the maximum CO
2
level by using
the Up and Down Arrow keys. The range is from 0 to 19% in 1% increments. Press ENTER to set the value and
move to the minimum O
2
level (O2LM). The range is from 2% to 20% in 1% increments. Press ENTER to set the
value and move to the FLO rate. Use the UP or DOWN arrow key to scroll to the desired FLO rate. The range is
from 0 to 220CM (0 to 129CF) in increments of 5 and 3 respectively. Press ENTER to set the value and begin oper
-
ation.
Operational Parameters (Sub Menu Options):
FLO indicates the opening to which the slide will move based on the stored value in CMH (in increments of 5) or
CFM depending on the selection of Cd46 (Airflow display units), Cd28 (Metric/Imperial) or the pressing of the deg
C/F key. CFM is displayed as CF, CMH is displayed as CM.
tIM is the time delay prior to the door opening. The time range is from 1 to 72 hrs in 1 hr increments.
CO2LM is the maximum level of CO
2
that is allowed for the cargo. The range is from 0% to 19% in 1% increments,
the default setting is 10.
O2LM is the minimum level of O
2
that is allowed for the cargo. The range is from 2% to 20% in 1% increments, the
default setting is 10.
Rtn is an offset value used to expand the return air temperature value to compensate for the fresh air entering the
container. The allowable range is from 0.6°C to 2.8°C or 1.0°F to 5.0°F in 0.1° increments the default setting is
2.8°C (5°F).
5.5 Connect Water-Cooled Condenser
The water-cooled condenser is used when cooling water is available and heating the surrounding air is objection
-
able, such as in a ship’s hold. If water-cooled operation is desired, connect in accordance with the following sub-
paragraphs.
5.5.1
Water-Cooled Condenser with Water Pressure Switch
1. Connect the water supply line to the inlet side of condenser and the discharge line to the outlet side of the
condenser (see
).
