Isn Control; Isn Received Data; Isn Transmitted Data - York MILLENNIUM YCUL0045SC Installation Operation & Maintenance

RECEIVED DATA (CONTROL DATA)
The YCUL 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 parameters 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 36 lists the control param-
eters. These values are found under feature 54 on the
ISN.
TABLE 36 – ISN RECEIVED DATA
ISN PAGE
P03
P04 LOAD LIMIT STAGE (0,1, 2)
P05 COOLING RANGE (DAT MODE ONLY)
P06
P07 START/STOP COMMAND
P08
P09
P10 HISTORY BUFFER REQUEST
TRANSMITTED DATA
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 37 – 38 show the data
values and page listings for this unit.
YORK INTERNATIONAL

ISN CONTROL

CONTROL DATA
SETPOINT
—
—
—
TABLE 37 – ISN TRANSMITTED DATA
ISN PAGE TYPE
P11 ANALOG LEAVING CHILLED LIQUID TEMP.
P12 ANALOG RETURN CHILLED LIQUID TEMP.
P13 ANALOG MIXED CHILLED LIQUID TEMP.
P14 ANALOG DISCHARGE AIR TEMP.
P15 ANALOG —
P16 ANALOG AMBIENT AIR TEMP.
P17 ANALOG —
P18 ANALOG SYS 1 RUN TIME (SECONDS)
P20 ANALOG SYS 1 DISCHARGE PRESSURE
P21 ANALOG —
P22 ANALOG —
P23 ANALOG —
P24 ANALOG SYS 1 ANTI-RECYCLE TIMER
P25 ANALOG ANTI-COINCIDENT TIMER
P27 ANALOG SYS 2 RUN TIME (SECONDS)
P28 ANALOG SYS 2 SUCTION PRESSURE
P29 ANALOG SYS 2 DISCHARGE PRESSURE
P33 ANALOG SYS 2 ANTI-RECYCLE TIMER
P35 ANALOG NUMBER OF COMPRESSORS
P36 DIGITAL SYS 1 ALARM
P37 DIGITAL SYS 2 ALARM
P38 DIGITAL EVAPORATOR HEATER STATUS
P39 DIGITAL EVAPORATOR PUMP STATUS
P40 DIGITAL —
P41 DIGITAL —
FORM 150.63-NM2
DATA
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