![background image](http://html.mh-extra.com/html/carrier/weathermaster-48z030/weathermaster-48z030_operation-and-service-manual_2560339080.webp)
80
Table 63 — CCN Configuration
Alert Limit Configuration —
The ALLM submenu is
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
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
→
RRH.S
), and the measured level is
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
→
RRHS
), and the measured level is
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.
ITEM
EXPANSION
RANGE
UNITS
POINT
DEFAULT
CCN
CCN CONFIGURATION
CCNA
CCN Address
1 - 239
CCNADD
1
CCNB
CCN Bus Number
0 - 239
CCNBUS
0
BAUD
CCN Baud Rate
1 - 5
CCNBAUDD
3
BROD
CCN BROADCST DEFINITIONS
TM.DT
CCN Time/Date Broadcast
ON/OFF
CCNBC
On
OAT.B
CCN OAT Broadcast
ON/OFF
OATBC
Off
ORH.B
CCN OARH Broadcast
ON/OFF
OARHBC
Off
OAQ.B
CCN OAQ Broadcast
ON/OFF
OAQBC
Off
G.S.B
Global Schedule Broadcst
ON/OFF
GSBC
Off
B.ACK
CCN Broadcast Ack'er
ON/OFF
CCNBCACK
Off
SC.OV
CCN SCHEDULES-OVERRIDES
SCH.N
Schedule Number
0 - 99
SCHEDNUM
1
HOL.T
Accept Global Holidays?
YES/NO
HOLIDAYT
No
O.T.L.
Override Time Limit
0 - 4
HRS
OTL
1
OV.EX
Timed Override Hours
0 - 4
HRS
OVR_EXT
0
SPT.O
SPT Override Enabled ?
YES/NO
SPT_OVER
Yes
T58.O
T58 Override Enabled ?
YES/NO
T58_OVER
Yes
GL.OV
Global Sched. Override ?
YES/NO
GLBLOVER
No
Summary of Contents for WEATHERMASTER 48Z030
Page 103: ...103 Fig 15 Typical Power Schematic Sizes 030 050 Shown a48 8408 ...
Page 104: ...104 Fig 16 Main Base Board Input Output Connections a48 8409 ...
Page 105: ...105 Fig 17 RCB ECB CEM SCB Input Output Connections a48 8410 ...
Page 106: ...106 Fig 18 Typical Gas Heat Unit Control Wiring 48Z055 105 Units Shown a48 8411 ...
Page 107: ...107 Fig 19 Typical Electric Heat Unit Control Wiring 50Z055 105 Units Shown a50 8248 ...
Page 108: ...108 Fig 20 Typical Power Wiring 115 V 48Z Units a48 8412 ...
Page 109: ...109 Fig 21 Typical Power Wiring 115 V 50Z Units a50 8249 ...
Page 110: ...110 Fig 22 Typical Gas Heat Section Size 055 105 Units Shown a48 8413 ...
Page 111: ...111 Fig 23 Component Arrangement Size 030 050 Units ...
Page 112: ...112 Fig 24 Component Arrangement Size 055 070 Units ...
Page 113: ...113 Fig 25 Component Arrangement Size 075 105 Units ...