SERIAL COMMUNICATION ANALOG INPUT DATA
This data can be read using a BACnet or Modbus network connection and can NOT be modified using this
connection. The Modbus Register Address for these points is 513 + AI #.
1
-
45
Form 201.26.OI1(11/09)
AI
BACNET NAME
ANALOG INPUT DESCRIPTION
1
LCHLT
LEAVING CHILLED LIQUID TEMP
2
RCHLT
RETURN CHILLED LIQUID TEMP (YLAA/YCWL only)
3
DAT
NOT USED
4
S1_SUCT_TEMP
NOT USED
5
OAT
AMBIENT AIR TEMPERATURE (YLAA and YLAE units only)
6
S1_SUCT_SH
NOT USED
7
S1_RUN_TIME
SYS 1 RUN TIME (SECONDS)
8
S1_SUCT_PR
SYS 1 SUCTION PRESSURE
9
S1_DSCH_PR
SYS 1 DISCHARGE PRESSURE
10
S1_CIR_TEMP
NOT USED
11
S1_DEF_TEMP
NOT USED
12
S1_EEV_OUT
NOT USED
13
S1_AR_TIMER
SYS 1 ANTI-RECYCLE TIMER
14
AC_TIMER
ANTI-COINCIDENT TIMER
15
S2_SUCT_TEMP
NOT USED
16
S2_RUN_TIME
SYS 2 RUN TIME (SECONDS)
17
S2_SUCT_PR
SYS 2 SUCTION PRESSURE
18
S2_DSCH_PR
SYS 2 DISCHARGE PRESSURE
19
S2_CIR_TEMP
NOT USED
20
S2_DEF_TEMP
NOT USED
21
S2_SUCT_SH
NOT USED
22
S2_AR_TIMER
SYS 2 ANTI-RECYCLE TIMER
23
S2_EEV_OUT
NOT USED
24
NUM_COMPS
NUMBER OF COMPRESSORS
25
S1_OP_CODE
*SYS 1 OPERATIONAL CODE
26
S1_FLT_CODE
*SYS 1 FAULT CODE
27
S2_OP_CODE
*SYS 2 OPERATIONAL CODE
28
S2_FLT_CODE
*SYS 2 FAULT CODE
29
S1_DBG_CODE
NOT USED
30
S1_FAN_STAGE
**SYS 1 FAN STAGES (YLAA/YLAE only)
31
S2_DBG_CODE
NOT USED
32
S2_FAN_STAGE
**SYS 1 FAN STAGES (YLAA/YLAE only)
33
CONTROL_MODE
UNIT CONTROL MODE (5=COOLING, 6=HEATING)
34
AR_TIME
ANTI-RECYCLE TIME (PROGRAMMED)
35
LCHLT_CUT
LEAVING CHILLED LIQUID TEMP CUTOUT
36
LOW_AMB_CUT
LOW AMBIENT TEMPERATURE CUTOUT
37
SUCT_P_CO_HT
NOT USED
38
L_SUCT_P_CO
LOW SUCTION PRESSURE CUTOUT
39
H_DSCH_P_CO
HIGH DISCHARGE PRESSURE CUTOUT
40
COOL_SETP Setpoint
COOLING SETPOINT
41
SP_SETP_S1
NOT USED
42
CONTROL_RG
COOLING RANGE
43
SP_CTL_RG_S1
NOT USED
44
SP_SETP_S2
NOT USED
45
HEAT_SETP
HEATING SETPOINT (YCWL only)
46
SP_CTL_RG_S2
NOT USED
47
HEAT_RANGE
HEATING RANGE (YCWL only)
48
S1_DSCH_TEMP
NOT USED
49
S1_DSCH_SH
NOT USED
50
S2_DSCH_TEMP
NOT USED
51
S2_DSCH_SH
NOT USED
52
LEAVING_HOT
LEAVING LIQUID HOT TEMPERATURE
(YCWL Units only)
53
RETURN_HOT
RETURN LIQUID HOT TEMPERATURE
(YCWL Units only)
* See ISN Operational and Fault code table.
** For interpretation of fan stages see tables in sections 2.8.1 and 2.8.2.