YORK INTERNATIONAL
4
FIG. 1 – REMOTE MODE READY TO START
CONTACTS
LD06820
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 160.54-O1 provides a list and explana-
tion of all Cycling shutdowns. While these contacts are
closed, the OptiView Control Center will display “Cy-
cling Shutdown – Auto Restart” on the System Status
Bar and the cause of the shutdown on the System De-
tails bar of the display. Cycling Shutdown contacts func-
tion in all operating modes.
FIG. 2 – CYCLING SHUTDOWN CONTACTS
LD06821
FIG. 3 – SAFETY SHUTDOWN CONTACTS
LD06823
FIG. 1 – REMOTE MODE READY TO START
CONTACTS
When closed, these contacts signify the following:
1. The OptiView 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 OptiView 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
OptiView Control Center will display the following
message: “SYSTEM READY TO START”.
FIG. 3 – SAFETY SHUTDOWN CONTACTS
When closed, these contacts signify the unit is not per-
mitted to start due to a SAFETY shutdown condition.
Safety shutdowns require a manual reset procedure be
performed before the unit can be restarted. YORK
Operating and Maintenance Manual 160.54-O1 provides
a list and explanation of all Safety shutdowns. While
these contacts are closed, the OptiView Control Center
will display “Safety Shutdown – Manual Restart” on
the System Status Bar and the cause of the shutdown
on the System Details Bar of the display. These con-
tacts will remain closed until the safety condition no
longer exists and a manual reset is performed by plac-
ing the OptiView Control Center COMPRESSOR
Switch in the Stop-Reset position (O). The unit can then
be restarted. Safety Shutdown contacts function in all
operating modes.