York MILLENNIUM YCAL0043SC, Manual, Page: 68 / 133

YORK INTERNATIONAL
68
Following are the four possible messages that can be
displayed after pressing the COOLING SETPOINT key,
indicating the cooling mode:
This message indicates that the cooling setpoint is un-
der LOCAL control. That is, the cooling setpoint is con-
trolling to the
locally programmed setpoint. The mes-
sage also indicates that the control point is based on
LEAVING water temperature out of the evaporator.
This message indicates that the cooling setpoint is un-
der LOCAL control (the cooling setpoint is controlling to
the
locally programmed cooling setpoint). However, un-
like the previous message, it is now indicating that the
control point is based on RETURN water temperature
into the evaporator.
“SETPOINTS“ KEYS
L O C A L L E A V I N G
W A T E R T E M P C O N T R O L
L O C A L R E T U R N
W A T E R T E M P C O N T R O L
00069IP
Unit must first be programmed for “Unit
Type” Liquid Chiller under OPTIONS
key to allow programming of appropri-
ate setpoints.
Programming of the cooling setpoints, daily schedule,
and safeties is accomplished by using the keys located
under the SETPOINTS section.
The three keys involved are labeled COOLING
SETPOINTS, SCHEDULE/ADVANCE DAY, and PRO-
GRAM.
Following are instructions for programming the respec-
tive setpoints. The same instruction should be used to
view the setpoints with the exception that the setpoint
will not be changed.
COOLING SETPOINTS
The Cooling setpoint and Range can be programmed by
pressing the COOLING SETPOINTS key. After pressing
the COOLING SETPOINTS key, the Cooling Mode (leav-
ing chilled liquid or return chilled liquid) will be displayed
for a few seconds, and then the setpoint entry screen will
be displayed.
Unit Controls