York YCAL0080SC Manuale Utente

YORK INTERNATIONAL

FORM 150.62-NM1

The Middle Market receives 8 data values from the ISN.
The first 4 are analog values and the last 4 are digital
values.  These 8 data values are used as control pa-
rameters when in REMOTE mode.  When the unit is in
LOCAL mode, these 8 values are ignored. If the unit
receives no valid ISN transmission for 5 minutes it will
revert back to all local control values. Table 51 lists the
5 control parameters. These values are found under
feature 54 on the ISN.

After receiving a valid transmission from the ISN, the
unit will transmit either operational data or history buffer
data depending on the “History Buffer Request” in page
10.  Data must be transmitted for every ISN page under
feature 54.  If there is no value to be sent to a particular
page, a zero will be sent.  Tables 52 - 53 show the data
values and page listings for this unit.

TABLE 51 – ISN RECEIVED DATA

TABLE 52 – ISN TRANSMITTED DATA

SETPOINT

LOAD LIMIT STAGE (0,1, 2)

 COOLING RANGE (DAT MODE ONLY)

—

START/STOP COMMAND

—

—

HISTORY BUFFER REQUEST

ANALOG LEAVING CHILLED LIQUID TEMP.

ANALOG RETURN CHILLED LIQUID TEMP.

ANALOG MIXED CHILLED LIQUID TEMP.

ANALOG DISCHARGE AIR TEMP.

ANALOG —

ANALOG AMBIENT AIR TEMP.

ANALOG —

ANALOG SYS 1 RUN TIME (SECONDS)

P20

ANALOG SYS 1 DISCHARGE PRESSURE

ANALOG —

ANALOG —

ANALOG —

ANALOG SYS 1 ANTI-RECYCLE TIMER

ANALOG ANTI-COINCIDENT TIMER

ANALOG SYS 2 RUN TIME (SECONDS)

ANALOG SYS 2 SUCTION PRESSURE

ANALOG SYS 2 DISCHARGE PRESSURE

ANALOG SYS 2 ANTI-RECYCLE TIMER

ANALOG NUMBER OF COMPRESSORS

DIGITAL

SYS 1 ALARM

DIGITAL

SYS 2 ALARM

DIGITAL

EVAPORATOR HEATER STATUS

DIGITAL

EVAPORATOR PUMP STATUS

DIGITAL

—

DIGITAL

—