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YORK INTERNATIONAL
74
be displayed for a few seconds, and then the setpoint
entry screen will be displayed.
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.
Unit must first be programmed for
“Unit Type” Liquid Chiller under Op-
tion S key to allow programming of ap-
propriate setpoints.
Programming of the cooling setpoints, daily sched-
ule, 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 (leaving chilled liquid or return chilled liquid) will
“SETPOINTS” KEYS
LOCAL LEAV I NG
WA T E R T EMP CON T ROL
LOCAL RETURN
WA T E R T EMP CON T ROL
00069IP
Unit Controls