TK Fresh System
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 TK Fresh system includes a door control module, vent door and vent grille. The 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. Refer to (Starting the TK Fresh System) for more information.
TK Fresh Operation
The system is pre-calibrated for air exchange rates of 0 to 225 m3/hr. (0 to 132 ft3/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 TK Fresh system is turned on, the controller automatically operates the vent door based on the previous TK Fresh Delay and TK Fresh Rate settings when power is restored.
TK Fresh Vent Door Assembly
- Caution
- Risk of Injury
- After installing or servicing the TK Fresh door, remove all tools and install the vent grille before starting the TK Fresh system. Failure to replace the vent grille before turning the TK Fresh system on may result in personal injury or unit damage.
A microprocessor controlled vent door provides programmable control of the air exchange rate. The vent door is adjusted to the desired position by a vent door motor and linkage assembly (See figure below). The system is pre-calibrated for air exchange rates of 0 to 225 m3/hr. (0 to 132 ft3/min.). The use of the TK Fresh system should be established by the shipper.
The default setting for TK Fresh in the Setpoint menu is the last value set (Off, TK Fresh). The Fresh Air Vent Man submenu should be set to TK Fresh to control the vent door to the fresh air exchange rate setting.
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 TK Fresh system is turned on, the controller automatically operates the vent door based on the previous TK Fresh Delay and TK Fresh Rate settings when power is restored.
