74
SPT Override Enabled? (
SPT.O
) — If a space sensor is pres-
ent, 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 setpoints 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 setpoints. A list is shown in
Table 72.
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 evaporator dis-
charge 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 evaporator
discharge temperature is above the configurable occupied EDT
High Alert Limit (
SA.H.O
), then Alert 303 will be generated
and heating operation will be stopped but cooling operation
will continue. The alert will automatically reset.
EDT Low Alert Limit/Unocc (
SA.L.U
) — If the evaporator
discharge temperature 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 evaporator
discharge temperature is above the configurable unoccupied
EDT High Alert Limit (
SA.H.U
), then Alert 303 will be generat-
ed 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 configured
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.
Table 72 — 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
Содержание Carrier Weathermaker 48A2
Страница 105: ...105 Fig 20 Typical Main Control Box Wiring Schematic 48 50A2 A3 A4 A5 Units...
Страница 106: ...106 Fig 21 Typical Auxiliary Control Box Wiring Schematic...
Страница 107: ...107 Fig 22 Typical 2 Stage Gas Heat Wiring Schematic Size 060 Units Shown a48 8357...
Страница 108: ...108 TO NEXT PAGE Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown A48 7296...
Страница 109: ...109 Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown cont A48 8358...
Страница 110: ...110 Fig 24 Typical Electric Heat Control Schematic 50 Series Size 060 Units Shown a50 8228...
Страница 111: ...111 Fig 25 Typical Power Schematic 48 50A2 A3 A4 A5 060 Unit Shown...
Страница 112: ...112 Fig 26 Typical Low Ambient Controls Option Wiring...
Страница 113: ...113 Fig 27 Typical Small Chassis Component Location Size 020 035 Units...
Страница 114: ...114 Fig 28 Typical Large Chassis Component Locations Size 040 060 Units...
Страница 118: ...118 Fig 30 Economizer Control Board ECB1 and VAV Control Board ECB2 A48 7706...
Страница 142: ...142 A48 3733 Fig 56 Main Burner Removal...
Страница 176: ...176 APPENDIX C VFD INFORMATION cont Fig F Internal Enclosure Fan Replacement A48 7716...
