69
SPT Override Enabled? (
SPT.O) — If a space sensor is
present, then it is possible to override an unoccupied period by
pushing the override button on the T55 or T56 sensor. This
option allows the user to disable this function by setting this
configuration to NO.
T58 Override Enabled? (
T58.O) — The T58 sensor is a CCN
device that allows cooling/heating set points to be adjusted,
space temperature to be written to the rooftop unit, and the abil-
ity to initiate a timed override. This option allows the user to
disable the override initiated from the T58 sensor by setting
this option to NO.
Global Schedule Override? (
GL.OV) — If the control is set
to receive global schedules then it is also possible for the global
schedule broadcaster to call out an override condition as well.
This configuration allows the user to disable the global sched-
ule broadcaster from overriding the control.
Alert Limit Configuration — The ALLM submenu is
used to configure the alert limit set points. A list is shown in
Table 81.
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.
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.
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 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 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 82.
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.
IMPORTANT: Sensor trim must not be used to extend
unit operation past the allowable operating range.
Doing so may void the warranty.
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