York YK Style H - Safety Stop

The DECIMAL key provides accurate entry of setpoint values.
A ± key has also been provided to allow entry of negative values
and AM/PM selection during time entry.
In order to accept changes made to the chiller setpoints, the
check key (✓) is provided as a universal ‘Enter’ key or ‘Accept’
symbol.
In order to reject entry of a setpoint or dismiss an entry form,
the ‘X’ key is provided as a universal ‘Cancel’ symbol.
Cursor Arrow keys are provided to allow movement on screens
which contain a large amount of entry data. In addition, these
keys can be used to scroll through history and event logs.
The Start/Stop control is operated via the Soft START button on the Home Screen. When the user
presses the Green START button, a dialog box is displayed instructing the user to press the ENTER
button to start the chiller or, to press the CANCEL button to abort the start.
When the chiller is running, the Start button is replaced by a Red SOFT STOP button. When the user
presses this button, a dialog box is displayed instructing the user to press the ENTER button to stop
the chiller or the CANCEL button to abort the stop command. The Soft Stop command will drive the
PRV closed and then shut off the chiller
The Start/Stop control is operated as follows:
• By the keypad when the chiller is set to local mode
• Remotely through digital inputs in digital or analog remote mode
• By the E-Link Gateway in BAS (ISN) remote mode
• By the SC_EQ in BAS (ISN) remote mode
When the control is changed to local mode from any other source, it will remain in RUN if already
running or remain in STOP if already stopped. A hardware Safety Stop button is also located on the
side of the panel.
Safety stop
Note: The Red Safety Stop button located on the control panel cabinet may be pressed to
immediately shut down the chiller if needed.
When depressed, the chiller will stop immediately and will not run under any condition. For safety
reasons, this position is required for many maintenance tasks to be completed.
The Safety Stop button must be rotated clockwise to release the stop condition. The safety stop is
not intended for normal shutdown of the chiller.
17Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center