Vent Position Sensor; Eautofresh Operation; Xtendfresh Operation; Connect Water-Cooled Condenser - Carrier PrimeLINE 69NT40-561-200 Operation And Service Manual

5.3.3

Vent Position Sensor

The vent position sensor (VPS) allows the user to determine the position of the fresh air vent via Cd45. This func-
tion code is accessible via the Code Select key.
The vent position will display for 30 seconds whenever motion corresponding to 5 CMH (3 CFM) or greater is
detected. It will scroll in intervals of 5 CMH (3 CFM). Scrolling to Cd45 will display the Fresh Air Vent Position.
The position of the vent will be recorded in the DataCORDER whenever the unit is running under AC power and
during any of the following conditions:
• Trip start
• Every power cycle
• Midnight
• Manual changes greater than 5 CMH (3 CFM) remaining in the new position for at least four minutes
The user has four minutes to make necessary adjustments to the vent setting. This time calculation
begins on the initial movement of the sensor. The vent can be moved to any position within the four
minutes. On completion of the first four minutes, the vent is required to remain stable for the next four
minutes. If vent position changes are detected during the four-minute stability period, AL50 will be
generated. This provides the user with the ability to change the vent setting without generating multi-
ple events in the DataCORDER.
5.4

EAUTOFRESH OPERATION

The optional eAutoFresh™ venting system is controlled through two function codes, Code 43 and Code 44. Code
43 contains specific parameters for operation and Code 44 provides a visible display of component conditions.
Procedures and technical information related to the eAutoFresh™ venting system can be found in the
oFresh Manual, located in the Literature section of the Container Refrigeration website. To find the manual from
the Literature section, click on Options > eAutoFresh.
5.5

XTENDFRESH OPERATION

The optional XtendFRESH™ controlled atmosphere system is controlled through two function codes, Code 43 and
Code 44. Code 43 contains specific parameters for operation and Code 44 provides a visible display of component
conditions.
Procedures and technical information related to the XtendFRESH™ controlled atmosphere system can be found in
the T-366 XtendFRESH
the manual from the Literature section, click on Options > XtendFRESH.
5.6

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.
5.6.1

Water-Cooled Condenser with Water Pressure Switch

1. Connect the water supply line to the inlet side of the condenser and the discharge line to the outlet side of
the condenser (see
2. Maintain a flow rate of 11 to 26 liters per minute (3 to 7 gallons per minute). The water pressure switch will
open to de-energize the condenser fan relay. The condenser fan motor will stop and will remain stopped
until the water pressure switch closes.
3. To shift to air-cooled condenser operation, disconnect the water supply and the discharge line to the water-
cooled condenser. The refrigeration unit will shift to air-cooled condenser operation when the water pressure
switch closes.
5.6.2

Water-Cooled Condenser with Condenser Fan 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 Figure
T-362
Manual, located in the Literature section of the Container Refrigeration website. To find
Figure 3.6, Figure 3.7).
3.6, Figure 3.7).
NOTE
5–4
T-342 eAut-