Alert Limit Configuration - Carrier WEATHERMASTER 48/50Z030-105 Operation And Service Manual

ITEM
CCN CCN CONFIGURATION
CCNA CCN Address
CCNB CCN Bus Number
BAUD CCN Baud Rate
BROD CCN BROADCST DEFINITIONS
TM.DT CCN Time/Date Broadcast
OAT.B CCN OAT Broadcast
ORH.B CCN OARH Broadcast
OAQ.B CCN OAQ Broadcast
G.S.B Global Schedule Broadcst
B.ACK CCN Broadcast Ack'er
SC.OV CCN SCHEDULES-OVERRIDES
SCH.N Schedule Number
HOL.T Accept Global Holidays?
O.T.L. Override Time Limit
OV.EX Timed Override Hours
SPT.O SPT Override Enabled ?
T58.O T58 Override Enabled ?
GL.OV Global Sched. Override ?
Alert Limit Configuration —
used to configure the alert limit set points. A list is shown in
Table 64.
SPT Low Alert Limit/Occ (SP.L.O) — If the space tempera-
ture is below the configurable occupied SPT Low Alert Limit
(SP.L.O), then Alert 300 will be generated and the unit will be
stopped. The alert will automatically reset.
SPT High Alert Limit/Occ (SP.H.O) — If the space tempera-
ture is above the configurable occupied SPT High Alert Limit
(SP.H.O), then Alert 301 will be generated and the unit will be
stopped. The alert will automatically reset.
SPT Low Alert Limit/Unocc (SP.L.U) — If the space tem-
perature is below the configurable unoccupied SPT Low Alert
Limit (SP.L.U), then Alert 300 will be generated and the unit
will be stopped. The alert will automatically reset.
SPT High Alert Limit/Unocc (SP.H.U) — If the space tem-
perature is above the configurable unoccupied SPT High Alert
Limit (SP.H.U), then Alert 301 will be generated and the unit
will be stopped. The alert will automatically reset.
EDT Low Alert Limit/Occ (SA.L.O) — If the space tempera-
ture is below the configurable occupied evaporator discharge
temperature (EDT) Low Alert Limit (SA.L.O), then Alert 302
will be generated and cooling operation will be stopped but
heating operation will continue. The alert will automatically
reset.
EDT High Alert Limit/Occ (SA.H.O) — If the space temper-
ature is above the configurable occupied EDT High Alert Limit
(SA.H.O), then Alert 303 will be generated and heating opera-
tion will be stopped but cooling operation will continue. The
alert will automatically reset.
EDT Low Alert Limit/Unocc (SA.L.U) — If the space tem-
perature is below the configurable unoccupied EDT Low Alert
Limit (SA.L.U), then Alert 302 will be generated and cooling
operation will be stopped but heating operation will continue.
The alert will automatically reset.
EDT High Alert Limit/Unocc (SA.H.U) — If the space tem-
perature is above the configurable unoccupied EDT High Alert
Limit (SA.H.U), then Alert 303 will be generated and heating
operation will be stopped but cooling operation will continue.
The alert will automatically reset.
RAT Low Alert Limit/Occ (RA.L.O) — If the return-air tem-
perature is below the configurable occupied RAT Low Alert
Limit (RA.L.O), then Alert 304 will be generated and internal
routines will be modified. Unit operation will continue but
VAV heating operation will be disabled. The alert will automat-
ically reset.
RAT High Alert Limit/Occ (RA.H.O) — If the return-air
temperature is above the configurable occupied RAT High
Table 63 — CCN Configuration
EXPANSION
The ALLM submenu is
RANGE UNITS
1 - 239
0 - 239
1 - 5
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
0 - 99
YES/NO
0 - 4 HRS
0 - 4 HRS
YES/NO
YES/NO
YES/NO
Alert Limit (RA.H.O), then Alert 305 will be generated and
operation will continue. The alert will automatically reset.
RAT Low Alert Limit/Unocc (RA.L.U) — If the return-air
temperature is below the configurable unoccupied RAT Low
Alert Limit (RA.L.U), then Alert 304 will be generated. Unit
operation will continue but VAV heating operation will be dis-
abled. The alert will automatically reset.
RAT High Alert Limit/Unocc (RA.H.U) — If the return-air
temperature is above the configurable unoccupied RAT High
Alert Limit (RA.H.U), then Alert 305 will be generated. Oper-
ation will continue. The alert will automatically reset.
OAT Low Alert Limit (OAT.L) — If the outside-air tempera-
ture measured by the OAT thermistor is below the configurable
OAT Low Alert Limit (OAT.L) then alert T316 will be
generated.
OAT High Alert Limit (OAT.H) — If the outside-air temper-
ature measured by the OAT thermistor is above the config-
urable OAT High Alert Limit (OAT.H) then alert T317 will be
generated
RARH Low Alert Limit (R.RH.L) — If the unit is config-
ured to use a return air relative humidity sensor (Configura-
→ →
tion UNIT SENS
below the configurable RH Low Alert Limit (R.RH.L), then
Alert 308 will occur. The unit will continue to run and the alert
will automatically reset.
RARH High Alert Limit (R.RH.H) — If the unit is config-
ured to use a return air relative humidity sensor (Configura-
→ →
tion UNIT SENS
above the configurable RARH High Alert Limit (R.RH.H),
then Alert 309 will occur. The unit will continue to run and the
alert will automatically reset.
OARH Low Alert Limit (O.RH.L) — If the unit is config-
ured to use an outdoor air relative humidity sensor (Configura-
→ →
tion ECON ORH.S) and the measured level is below the
configurable OARH Low Alert Limit (O.RH.L), then econo-
mizer operation will be disabled. The unit will continue to run
and the alert will automatically reset.
OARH High Alert Limit (O.RH.H) — If the unit is config-
ured to use a return air relative humidity sensor (Configura-
→ →
tion ECON ORH.S) and the measured level is above the
configurable OARH High Alert Limit (O.RH.H), then econo-
mizer operation will be disabled. The unit will continue to run
and the alert will automatically reset.
Supply Duct Pressure Low Alert Limit (SP.L) — If the unit
is a VAV unit with a supply duct pressure sensor and the mea-
sured supply duct static pressure is below the configurable SP
Low Alert Limit (DP.L), then Alert 310 will occur. The unit
will continue to run and the alert will automatically reset.
80
POINT DEFAULT
CCNADD 1
CCNBUS 0
CCNBAUDD 3
CCNBC On
OATBC Off
OARHBC Off
OAQBC Off
GSBC Off
CCNBCACK Off
SCHEDNUM 1
HOLIDAYT No
OTL 1
OVR_EXT 0
SPT_OVER Yes
T58_OVER Yes
GLBLOVER No
→
RRH.S), and the measured level is
→
RRHS), and the measured level is