York YCAS0295EB, Installation Operation & Maintenance

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164 YORK INTERNATIONAL
FORM 201.19-NM7 (804)
Press the Program key again, key in the numbers “6140”,
then press Enter. As the code is being keyed in, the digits
are not displayed but are shown as “*” as shown:
When the Enter key is pressed, the following message
will appear:
Key in a “1” for if default setpoints are required, or a “0”
for individually programmed values, then press En ter to
store the selection into memory.
If individual programming is selected (0), the display
will now return to the Status display. If a default setpoints
have been selected, the display will momentarily dis play
the message shown below before returning to the Sta tus
display:
It is often easier to select Default
Set points and then reprogram a few
that require changing rath er than
pro gram ming each in di vid u al value
from scratch.
8.3 PROGRAMMING "DEFAULT" VALUES
Programmable values may be individually pro grammed at
start-up or any time thereafter. For ease of pro gram ming,
once the type of refrigerant is programmed un der the Pro-
gram key and in the Service Mode, a “defaults password”
may be pro grammed to automatically program default
values into memory. This will preset all programmable
values un der the Program key to values that will allow
operation of the chiller under most operating conditions.
This al lows quick start-up pro gram ming for typical
chilled wa ter ap pli ca tions.
To program the default values into memory, fi rst press
the PROGRAM key followed by the ENTER key, to
pro gram the “refrigerant type” .
P R O G R A M M O D E
* * * *
D E F A U L T S E T P O I N T S ?
1 = Y E S , 0 = N O, 1
P R O G R A M O P T I O N S S E T
T O D E F A U L T V A L U E S
If manual control is desired, press the
!
or
"
key. One
of the following messages will be displayed:
System 1 or 2 can be selected as the lead by press ing
the
!
or
"
key. The ENTER key must be pressed to
save the selection in memory.
Automatic/Manual Power Failure Restart
The chiller may be selected for “Automatic” or “Man-
u al” restart after a power failure. In most in stanc es,
“Au to mat ic Restart” is preferred to allow the chiller
to au to mat i cal ly restart when power is reapplied 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 Man u al Reset on power failure
since chillers nor mal ly are re quired to
auto-restart af ter a power failure.
L E A D / L A G C O N T R O L
M A N U A L S Y S 2 L E A D
L E A D / L A G C O N T R O L
M A N U A L S Y S 1 L E A D
P O W E R F A I L R E S T A R T
A U T O M A T I C
Micro Panel Contents