Carrier 48/50AJ specifications Alert Limit Configuration, Sensor Trim Configuration

then Alert 309 will occur. 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.

Supply Duct Pressure High Alert Limit (SP.H) — If the unit is a VAV unit with a supply duct pressure sensor and the mea- sured supply duct static pressure is above the configurable 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 CO2 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 automati- cally reset.

Sensor Trim Configuration — The TRIM submenu is used to calibrate the sensor trim settings. 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 88.

IMPORTANT: Sensor trim must not be used to extend unit operation past the allowable operating range. Doing so may void the warranty.

Air Temperature Leaving Supply Fan Sensor (SAT.T) — This variable is used to adjust the supply fan temperature sensor reading. The sensor reading can be adjusted ± 10° F to match the actual measured temperature.

Return Air Temperature Sensor Trim (RAT.T) — This vari- able 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 vari- able is used to adjust the outdoor air temperature sensor read- ing. 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.

Circuit A Saturated Condenser Temperature Trim (CTA.T) — This variable is used to adjust the saturated condenser tempera- ture sensor reading for circuit A. The sensor reading can be adjusted ± 30° F to match the actual measured temperature. Used on 48/50AJ,AK,AW,AY units only.

Circuit B Saturated Condenser Temperature Trim (CTB.T) — This variable is used to adjust the saturated condenser tempera- ture sensor reading for circuit B. The sensor reading can be adjusted ± 30° F to match the actual measured temperature. Used on 48/50AJ,AK,AW,AY units only.

Suction Pressure Circuit A Trim (SP.A.T) — This variable is used to adjust the suction pressure sensor reading for circuit A. The sensor reading can be adjusted ± 50 psig to match the actu- al measured pressure.

Suction Pressure Circuit B Trim (SP.B.T) — This variable is used to adjust the suction pressure sensor reading for circuit B. The sensor reading can be adjusted ± 50 psig to match the actu- al measured pressure.

Table 87 — Alert Limit Configuration

ITEM	EXPANSION	RANGE	UNITS	POINT	DEFAULT
SP.L.O	SPT lo alert limit/occ	-10-245	dF	SPLO	60
SP.H.O	SPT hi alert limit/occ	-10-245	dF	SPHO	85
SP.L.U	SPT lo alert limit/unocc	-10-245	dF	SPLU	45
SP.H.U	SPT hi alert limit/unocc	-10-245	dF	SPHU	100
SA.L.O	EDT lo alert limit/occ	-40-245	dF	SALO	40
SA.H.O	EDT hi alert limit/occ	-40-245	dF	SAHO	100
SA.L.U	EDT lo alert limit/unocc	-40-245	dF	SALU	40
SA.H.U	EDT hi alert limit/unocc	-40-245	dF	SAHU	100
RA.L.O	RAT lo alert limit/occ	-40-245	dF	RALO	60
RA.H.O	RAT hi alert limit/occ	-40-245	dF	RAHO	90
RA.L.U	RAT lo alert limit/unocc	-40-245	dF	RALU	40
RA.H.U	RAT hi alert limit/unocc	-40-245	dF	RAHU	100
R.RH.L	RARH low alert limit	0-100	%	RRHL	0
R.RH.H	RARH high alert limit	0-100	%	RRHH	100
SP.L	SP low alert limit	0-5	"H2O	SPL	0
SP.H	SP high alert limit	0-5	"H2O	SPH	2
BP.L	BP lo alert limit	-0.25-0.25	"H2O	BPL	-0.25
BP.H	BP high alert limit	-0.25-0.25	"H2O	BPH	0.25
IAQ.H	IAQ high alert limit	0-5000		IAQH	1200

Table 88 — Sensor Trim Configuration

ITEM	EXPANSION	RANGE	UNITS	POINT	DEFAULT
SAT.T	Air Temp Lvg SF Trim	-10 - 10	^F	SAT_TRIM	0
RAT.T	RAT Trim	-10 - 10	^F	RAT_TRIM	0
OAT.T	OAT Trim	-10 - 10	^F	OAT_TRIM	0
SPT.T	SPT Trim	-10 - 10	^F	SPT_TRIM	0
CTA.T	Cir A Sat. Cond. Temp Trim	-30 - 30	^F	SCTA_TRIM	0
CTB.T	Cir B Sat. Cond. Temp Trim	-30 - 30	^F	SCTB_TRIM	0
SP.A.T	Suct.Press.Circ.A Trim	-50 - 50	PSIG	SPA_TRIM	0
SP.B.T	Suct.Press.Circ.B Trim	-50 - 50	PSIG	SPB_TRIM	0
DP.A.T	Dis.Press.Circ.A Trim	-50 - 50	PSIG	DPA_TRIM	0
DP.B.T	Dis.Press.Circ.B Trim	-50 - 50	PSIG	DPB_TRIM	0

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