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YORK INTERNATIONAL
FORM 150.63-NM1
145
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 val-
ues. These 8 data values are used as control param-
eters 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 parameters. These values are found under fea-
ture 54 on the ISN.
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”.
Data must be transmitted for every ISN page under fea-
ture 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.
ISN CONTROL
TABLE 36 – ISN RECEIVED DATA
TABLE 37 – ISN TRANSMITTED DATA
ISN PAGE
CONTROL DATA
P03
SETPOINT
P04
LOAD LIMIT STAGE (0,1, 2)
P05
COOLING RANGE (DAT MODE ONLY)
P06
—
P07
START/STOP COMMAND
P08
—
P09
—
P10
HISTORY BUFFER REQUEST
ISN PAGE
TYPE
DATA
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
—
4
Summary of Contents for MILLENNIUM YCUL0016SC
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