Thermo King 098203, Руководство по обслуживанию

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Unit Description, Features & Options
30
Air Ventilation Logging (AVL - Optional)
AVL is used for detecting and logging the fresh air exchange position on the manual fresh air vent.
The opening angle of the fresh air vent is converted to an output signal from approximately 2-5 volts.
The disk opening is detected in steps of 0-125, 150, 175, 215 and 225 m 3 /hr.
See “Air Ventilation Logging (AVL)” on page 112 for more information.
Advanced Fresh Air Management (AFAM) System (Optional)
An advanced microprocessor controlled fresh air management system provides programmable control of
air exchange rate, programmable delayed vent opening, automatic closure of air exchange vent during
low ambient conditions, and data logging of air exchange rate and vent opening delay interval.
The AFAM system includes a door control module, vent door and vent grille. The MP-4000 controller
sends a communication signal to the door control module to position vent door to desired position. The
controller can also be set to delay opening of fresh air vent for up to 48 hours (in 1 hour increments). This
allows faster product temperature pull-down.
See “Starting the AFAM System” on page 114 for more information.
AFAM Operation
The system is pre-calibrated for air exchange rates of 0 to 225 m 3 /hr. (0 to 132 ft 3 /min.). The actual door
position is based on the air exchange setting and the power supply frequency.
If the controller identifies a component failure during unit startup, an alarm is recorded in the controller
display and data-logger memory. If a power loss occurs after the AFAM system is turned on, the
controller automatically operates the vent door based on the previous AFAM Delay and AFAM Rate
settings when power is restored.
1. Vent Door
2. Door Control Module
3.
Interface Module Board and Cable (mounts in
Control Box)
4. Grille
Figure 13: AFAM System