Pulsating Vent Door

On units equipped with the TK Fresh option, a harness from J_B12 to the on/off switch, and a container prefix of HLXU. If the TK Fresh door is open it will close automatically if the on/off switch is turned off. Unit and controller will shut off and the TK Fresh door will be power close.

In the past the TK Fresh door would open and stay at a fixed position. Now the TK Fresh door will open to the fully open position, and stay open for a calculated period of time.

TK Fresh Plus set to “TK Fresh” and the TK Fresh Rate set to 75 CMH

In the past if you wanted 75 CMH, the door would open to the 75 CMH position and stay. Now the door will remain closed and then opens fully for 5 minutes every 15 minutes to achieve the same 75 CMH.

• When the door is closed, the display will read “PULSATING TK FRESH XXX SEC TO DOOR OPEN”.

• When the door is open, the display will read “PULSATING TK FRESH DOOR OPEN”.

• When the TK Fresh door opens, it remains open for a minimum of 30 seconds.

In the past once the CO₂ level reached the maximum setpoint, the door would start to ramp open. Once the CO₂ level decrease the door would start to ramp closed. Now once the CO₂ level reaches the maximum setpoint, the door opens fully for a calculated period of time. The door will then close for a calculated period time. If the CO₂ level remains above the maximum setpoint, the calculated period of time the door is open will be increased and the period of time closed will decrease.

• When the door is closed, the display will read “PULSATING TK Fresh XXX SEC TO DOOR OPEN”.

• When the door is open, the display will read “PULSATING TK Fresh DOOR OPEN”.

• When the TK Fresh door opens, it remains open for a minimum of 30 seconds.