York MILLENIUM YCAS Series, Установка, эксплуатация и обслуживание, Страница: 141 / 156

141
YORK INTERNATIONAL
FORM 201.18-NM6
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, 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
Status display:
It is often easier to select Default
Setpoints and then reprogram a few
that require changing rather than pro-
gramming each individual value from
scratch.
A list of the default values entered into memory, if this
program option is selected, is shown below:
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 un-
der the Program key, 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 programming for typical chilled wa-
ter applications.
To program the default values into memory, first press
the PROGRAM key followed by the ENTER key, to
program the “refrigerant type.” Press the Program key
again, key in the numbers “6140”, then press Enter. As
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, 2, 3 or 4 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
“Manual” restart after a power failure. In most instances,
“Automatic Restart” is preferred to allow the chiller to
automatically 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 Manual Reset on power failure
since chillers normally are required to
auto-restart after 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
6140
Programmable Value Default
Setting
Discharge Pressure Cut-Out R-22 28 Bar (399 PSIG)
Low Ambient Cut-Out Std. Amb. -4°C (25°F)
Low Amb. -4°C (25°F)
High Ambient Temperature Cut-Out 38°C (130°F)
Discharge Pressure Unload R-22 26 Bar (375 PSIG)
High Motor Current Unload 100%
Anti-Recycle Timer 600 sec.
Leaving Chilled Liquid Temp Cut-Out 2°C (36°F)
Suction Pressure Cut-Out R-22 3 Bar (44 PSIG)
8