Programming "Default" Values - York MILLENNIUM YCAS Installation Operation & Maintenance

The micro will accept a range of programmable values
between 300 - 600 seconds.
To program the Anti-Recycle Time, key in the required
setting and press the Enter key to store the value into
memory and scroll to the next display.
Local / Remote Communications
L O C A L / R E M O T E
L O C A L
The panel can be programmed for "Local" or "Remote"
communications. "Local" mode allows monitoring
through the RS-485 port only. "Remote", allows an ex-
ternal device such as an ISN or Remote Control Center
to change setpoints and programming points.
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The keys are used to change from Local to Re-
mote. The ENTER Key must be pressed to save the
selection in memory.
Imperial / SI Units Display
D I S P L A Y
I M P E R I A L
This allows the operator to select the display messages
to display SI (Scientific International, Bars, ºC, etc.); or
Imperial Units (PSIG, ºF, etc.).
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The keys are used to change from Imperial to SI
units. The ENTER Key must be pressed to save the
selection in memory.
Automatic / Manual "Lead / Lag"
L E A D / L A G
A U T O M A T I C
The chiller may be selected for manual lead/lag or auto-
matic lead/lag. In some cases the operator may want to
manually select the system that is desired to be the lead
system. In most cases, automatic lead/lag is selected to
allow the micro to attempt to balance run time between
the system. Details of manual and automatic lead / lag
operation are outlined in Section 1.21.
YORK INTERNATIONAL
M O D E
U N I T S
C O N T R O L
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The keys are used to change from Automatic to
Manual lead/lag. The ENTER key must be pressed to
save the selection in memory.
If manual control is desired, press the
of the following messages will be displayed:
L E A D / L A G C O N T R O L
M A N U A L S Y S
L E A D / L A G C O N T R O L
M A N U A L S Y S
System 1, 2, 3 or 4 can be selected as the lead by press-
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ing the or key. The ENTER key must be pressed
to save the selection in memory.
Automatic / Manual Power Failure Restart
P O W E R F A I L
A U T O M A T I C
The chiller may be selected for "Automatic" or
"Manual" restart after a power failure. In most in-
stances, "Automatic Restart" is preferred to allow the
chiller to automatically restart when power is reap-
plied after a power failure. When "Manual" is selected,
the chiller will not operate after re-application of power
until the ON / OFF Rocker Switch on the keypad is
cycled OFF and then ON.
In most applications, it is undesirable
to use Manual Reset on power failure
since chillers normally are required to
auto-restart after a power failure.

8.3 PROGRAMMING "DEFAULT" VALUES

Programmable values may be individually programmed
at start-up or any time thereafter. For ease of program-
ming, once the type of refrigerant is programmed in
under the Program key, a "defaults password" may be
programmed to automatically program default values
into memory. This will preset all programmable values
under the Program key to values that will allow opera-
FORM 201.18-NM2
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or key. One
1 L E A D
2 L E A D
R E S T A R T
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