95
EDT Low Alert Limit/Occ (SA.L.O)
If the space temperature is below the configurable occupied
evaporator discharge temperature (EDT) Low Alert Limit
(
SA.L.O
), then Alert 302 will be generated and cooling opera-
tion will be stopped but heating operation will continue. The
alert will automatically reset.
EDT High Alert Limit/Occ (SA.H.O)
If the space temperature is above the configurable occupied
EDT High Alert Limit (
SA.H.O
), then Alert 303 will be gener-
ated and heating operation will be stopped but cooling opera-
tion will continue. The alert will automatically reset.
EDT Low Alert Limit/Unocc (SA.L.U)
If the space temperature is below the configurable unoccupied
EDT Low Alert Limit (
SA.L.U
), then Alert 302 will be gener-
ated and cooling operation will be stopped but heating opera-
tion will continue. The alert will automatically reset.
EDT High Alert Limit/Unocc (SA.H.U)
If the space temperature is above the configurable unoccupied
EDT High Alert Limit (
SA.H.U
), then Alert 303 will be gener-
ated and heating operation will be stopped but cooling opera-
tion will continue. The alert will automatically reset.
RAT Low Alert Limit/Occ (RA.L.O)
If the return-air temperature is below the configurable occu-
pied RAT Low Alert Limit (
RA.L.O
), then Alert 304 will be
generated and internal routines will be modified. Unit opera-
tion will continue but VAV heating operation will be disabled.
The alert will automatically 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 unoccu-
pied RAT Low Alert Limit (
RA.L.U
), then Alert 304 will be
generated. Unit operation will continue but VAV heating opera-
tion will be disabled. The alert will automatically reset.
RAT High Alert Limit/Unocc (RA.H.U)
If the return-air temperature is above the configurable unoccu-
pied RAT High Alert Limit (
RA.H.U
), then Alert 305 will be
generated. Operation will continue. The alert will automatical-
ly reset.
OAT Low Alert Limit (OAT.L)
If the outside-air temperature 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 temperature measured by the OAT thermistor
is above the configurable OAT High Alert Limit (
OAT.H
) then
alert T317 will be generated.
RARH Low Alert Limit (R.RH.L)
If the unit is configured to use a return air relative humidity
sensor (
Configuration
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 configured to use a return air relative humidity
sensor (
Configuration
UNIT
SENS
RRH.S
), and the
measured level is above the configurable RARH High Alert
Limit (
R.RH.H
), then Alert 309 will occur. The unit will con-
tinue to run and the alert will automatically reset.
OARH Low Alert Limit (O.RH.L)
If the unit is configured to use an outdoor air relative humidity
sensor (
Configuration
ECON
ORH.S
) and the measured
level is below the configurable OARH Low Alert Limit
(
O.RH.L
), then economizer 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 configured to use a return air relative humidity
sensor (
Configuration
ECON
ORH.S
) and the measured
level is above the configurable OARH High Alert Limit
(
O.RH.H
), then economizer 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 measured supply duct static pressure is below the configu-
rable SP Low Alert Limit (
SP.L
), then Alert 310 will occur. The
unit will continue to run and the alert will automatically reset.
Supply Duct Pressure High Alert Limit (SP.H)
If the unit is a VAV unit with a supply duct pressure sensor and
the measured supply duct static pressure is above the configu-
rable SP High Alert Limit (
SP.H
), then Alert 311 will occur. The
unit will continue to run and the alert will automatically reset.
Building Pressure Low Alert Limit (BP.L)
If the unit is configured to use modulating power exhaust, then
a building static pressure limit can be configured using the BP
Low Alert Limit (
BP.L
). If the measured pressure is below the
limit then Alert 312 will occur.
Building Pressure High Alert Limit (BP.H)
If the unit is configured to use modulating power exhaust, then
a building static pressure limit can be configured using the BP
Hi Alert Limit (
BP.H
). If the measured pressure is above the
limit, then Alert 313 will occur.
Indoor Air Quality High Alert Limit (IAQ.H)
If the unit is configured to use a CO
2
sensor and the level is
above the configurable IAQ High Alert Limit (
IAQ.H
), then
the alert will occur. The unit will continue to run and the alert
will automatically reset.
Sensor Trim Configuration
The TRIM submenu is used to calibrate the sensor trim set-
tings. The trim settings are used when the actual measured
reading does not match the sensor output. The sensor can be
adjusted to match the actual measured reading with the trim
function. A list is shown in Table 75.
Air Temperature Leaving Supply Fan Sensor (SAT.T)
This variable is used to adjust the supply fan temperature sen-
sor reading. The sensor reading can be adjusted ±10°F to
match the actual measured temperature.
Return Air Temperature Sensor Trim (RAT.T)
This variable is used to adjust the return air temperature sensor
reading. The sensor reading can be adjusted ± 10°F to match
the actual measured temperature.
Outdoor Air Temperature Sensor Trim (OAT.T)
This variable is used to adjust the outdoor air temperature sen-
sor reading. The sensor reading can be adjusted ± 10°F to
match the actual measured temperature.
Space Temperature Sensor Trim (SPT.T)
This variable is used to adjust the space temperature sensor
reading. The sensor reading can be adjusted ± 10°F to match
the actual measured temperature.
IMPORTANT: Sensor trim must not be used to extend unit
operation past the allowable operating range. Doing so may
impair or negatively affect the Carrier product warranty.
Summary of Contents for Weathermaster 48P2030-100
Page 130: ...130 Fig 19 Typical Power Schematic Sizes 040 075 Shown ...
Page 131: ...131 Fig 20 Main Base Board Input Output Connections ...
Page 132: ...132 Fig 21 RXB EXB CEM SCB Input Output Connections ...
Page 133: ...133 Fig 22 Typical Gas Heat Unit Control Wiring 48P030 100 Units Shown ...
Page 134: ...134 Fig 23 Typical Electric Heat Wiring 50P030 100 Units Shown ...
Page 135: ...135 Fig 24 Typical Power Wiring 115 V ...
Page 136: ...136 Fig 25 Typical Gas Heat Section Size 030 050 Units Shown ...
Page 138: ...138 Fig 27 Component Arrangement Size 030 035 Units ...
Page 139: ...139 Fig 28 Component Arrangement Size 040 075 Units ...
Page 140: ...140 Fig 29 Component Arrangement Size 090 100 Units ...
