Carrier 30XW150-400 Equipment Stop Screen, Navigator Start/Stop Control, Operating Control, Type

commands, except the Emergency Stop Command will be ignored. The Run Status variable will indicate the current sta- tus of the machine (OFF, RUNNING, DELAY, or READY), depending on the position of the Remote/Off/Enable Switch closure. The Chiller Occupied? variable will change to YES. The Control Type variable will change to Remote. The Oper- ating Type variable will change to Remote.

Master Mode — To activate Dual Chiller Control, each ma- chine must be individually configured for Dual Chiller Control. To operate the machines in Dual Chiller Mode, one machine must be designated as the master unit and one machine as the slave unit. On the master unit, press the Start/Stop button on the Touch Pilot display. The Equipment Start screen will be dis- played. Select Master Mode. Failure to start the Master unit in this manner will cause both machines to operate in local mode.

The Master Unit Control can be done locally, remotely or through CCN commands per the master/slave configuration (Master Control Type). The control will ignore the position of Enable/Off/Remote Contact switch if the Master Control Type is configured for Local Control or CCN Control. The Run Status variable, Chiller Occupied? variable, and Con- trol Type variable will change based on the Master Control Type configured above and the Machine On/Off Control de- fined above. The Operating Type variable will change to Master.

To Turn Machine Off — To turn the machine off, press the Start/Stop button on the Touch Pilot display. See Fig. 17. The machine will shut down. While the unit is in Local Off, it will remain shut down and ignore all CCN commands as well as the position of Enable/Off/Remote Contact switch. The Run Status variable, indicating the current status of the machine, will change to OFF. The Chiller Occupied? variable will change to NO. The Control Type variable will indicate Local. The Operating Type variable will change to L-OFF (Local Off).

Fig. 17 — Equipment Stop Screen

NAVIGATOR™ DISPLAY MACHINE CONTROL — Ma- chine On/Off control with the Navigator display is determined by the configuration of the Operating Type Control (OPER). Options to control the machine locally via a switch, from a lo- cal Time Schedule, or via a Carrier Comfort Network® com- mand are offered. See Table 17.

The schedules consist of 8 user-configurable occupied time periods. The control supports time schedules for local control, remote control, and ice building. These time periods can be flagged to be in effect or not in effect on each day of the week. The day begins at 00.00 and ends at 24.00. The machine is in unoccupied mode unless a scheduled time period is in effect. If an occupied period is to extend past midnight, the occupied period must end at 24:00 hours (midnight) and a new occupied period must be programmed to begin at 00:00 hours.

In the following example, a early morning pulldown time period is scheduled for Monday morning from 12:00 AM to 3:00 AM. The occupied period starts at 7:00 AM, Monday through Saturday. The occupied time ends at 6:00 PM on Mon- day and Tuesday, 9:30 PM on Wednesday, 5:00 PM on Thurs- day and Friday, and 12:00 PM on Saturday.

NOTE: This schedule was designed to illustrate the program- ming of the schedule function and is not intended as a recom- mended schedule for chiller operation.

Switch Control — In the Switch Control operating type, the Enable/Off/Remote Contact switch controls the machine local- ly. All models are factory configured with Operating Type Control (OPER) set to SWITCH CTRL (Switch Control). With SWITCH CTRL, switching the Enable/Off/Remote Contact switch to the Enable or Remote Contact position (ex- ternal contacts closed) will put the chiller in an occupied state. The Unit Run Status (STAT) will indicate the current status of the machine and will change from OFF to RUNNING or DELAY. The unit Occupied Status (OCC) will change from NO to YES. The Status Unit Control Type (CTRL) will change from LOCAL OFF when the switch is Off to LOCAL ON when in the Enable position or in the Remote Contact position with external contacts closed.

ITEM	ITEM EXPANSION	PATH	VALUE
OPER	Operating Control	Operating	SWITCH
	Type	Modes→ SLCT→ OPER	CTRL

Table 17 — Navigator Start/Stop Control

CONTROL	ACTIVE	REMOTE/OFF/ENABLE	REMOTE ON/OFF		CCN CHILLER	EMERGENCY		REMOTE	UNIT
METHOD	OPERATING			TIME SCHEDULE 1	START/STOP	STOP	ALARM	LOCKOUT
(OPER)	TYPE	SWITCH	SWITCH		(CHIL_S_S)	(EMSTOP)		SWITCH	STATUS
		Off	—	—	—	—	—	—	Off
		Remote	Open	—	—	—	—	—	Off
All	Local Off	—	—	—	—	Enable	—	—	Off
		—	—	—	—	—	Yes	—	Off
		—	—	—	—	—	—	Closed	Off
Switch	Local On	Enable	—	—	—	Disable	—	—	On
Control		Remote	Closed	—	—	Disable	—	—	On
Time	Local	Enable	—	Occupied	—	Disable	—	—	On
		Remote	Closed	Occupied	—	Disable	—	—	On
Schedule	Schedule
		—	—	Unoccupied	—	Disable	—	—	Off
		Remote	Closed	—	Enable	Disable	—	—	On
CCN	CCN	Remote	Closed	—	Disable	Disable	—	—	Off
Control		Enable	—	—	Enable	Disable	—	—	On
		Enable	—	—	Disable	Disable	—	—	Off

23