Fig. 1 - Remote Mode Ready To Start Contacts; Fig. 2 - Cycling Shutdown Contacts - York MILLENNIUM YT J Wiring Diagram

FIG. 1 – REMOTE MODE READY TO START
CONTACTS
FIG. 1 – REMOTE MODE READY TO START
CONTACTS
When closed, these contacts signify the following:
1. The Graphic Control Center is in "digital", "ana-
log" or "ISN" remote operating mode, allowing
for energy management system or remote start/stop
control (Fig. 6);
2. All chiller safety cutout controls are in the normal
position, so they will allow the unit to start;
3. All chiller cycling cutout controls are in the nor-
mal position, so they will allow the unit to start;
4. The Graphic Control Center COMPRESSOR
switch is in the "RUN" (l) position;
5. The 30 minute anti-recycle timer has timed out. A
closure of the Remote Mode Ready to Start Con-
tacts then signifies that the unit shall start when
the Energy Management System maintains the Re-
mote Stop contact (Fig. 6) open and momentarily
closes the Remote Start Contact (Fig. 6). When the
Remote Mode Ready to Start Contacts close, the
Graphic Control Center will display the following
message: "SYSTEM READY TO START".
4
LD04383
FIG. 2 – CYCLING SHUTDOWN CONTACTS
FIG. 2 – CYCLING SHUTDOWN CONTACTS
When closed, these contacts signify the unit is not per-
mitted to start due to a CYCLING shutdown condition.
The unit will automatically restart after the cycling con-
dition is no longer present. YORK Operating and Main-
tenance Manual 160.55-O1 provides a list and explana-
tion of all Cycling shutdowns. While these contacts are
closed, the Graphic Control Center will display "Cycling
Shutdwon – Auto Restart" on the System Status Bar
and the cause of the shutdown on the System Details
bar of the display. Cycling Shutdwon contacts function
in all operating modes.
LD04384
YORK INTERNATIONAL