126
either a faulty sensor, wiring error, or damaged input on the
CEM control board.
T246 (Supply Air Cfm Sensor Failure)
If the supply air cfm sensor (
Inputs
CFM
S.CFM
) fails,
fan tracking is not possible and the system will shut down. Re-
covery is automatic. Reason for error is either a faulty sensor,
wiring error, or damaged input on the EXB control board.
T247 (Return Air Cfm Sensor Failure)
If the return air cfm sensor (
Inputs
CFM
R.CFM
) fails, fan
tracking is not possible and the system will shut down. Recov-
ery is automatic. Reason for error is either a faulty sensor, wir-
ing error, or damaged input on the EXB control board.
T300 (Space Temperature Below Limit)
If the space temperature is below the configurable SPT Low
Alert Limits (occupied [
Configuration
ALLM
SP.L.O
] for
5 minutes or unoccupied [
Configuration
ALLM
SP.L.U
]
for 10 minutes), then an alert will be broadcast. The alert will
automatically reset.
T301 (Space Temperature Above Limit)
If the space temperature is above the configurable SPT High
Alert Limits (occupied [
Configuration
ALLM
SP.H.O
] for
5 minutes or unoccupied [
Configuration
ALLM
SP.H.U
]
for 10 minutes), then an alert will be broadcast. The alert will
automatically reset.
T302 (Supply Temperature Below Limit)
If the supply-air temperature measured by the supply tempera-
ture sensor is below the configurable SAT LO Alert Limit/Occ
(
Configuration
ALLM
SA.L.O
) for 5 minutes or the Low
Supply air temperature alert limit unoccupied mode (
Configu-
ration
ALLM
SA.L.U
) for 10 minutes, then an alert will be
broadcast.
T303 (Supply Temperature Above Limit)
If the supply temperature is above the configurable SAT HI
Alert Limit Occ (
Configuration
ALLM
SAH.O
) for 5 min-
utes or the SAT HI Alert Limit/Unocc (
Configuration
ALLM
SA.H.U
) for 10 minutes, then an alert will be broad-
cast. The alert will automatically reset.
T304 (Return Air Temperature Below Limit)
If the return air temperature measured by the RAT sensor is be-
low the configurable RAT LO Alert Limit/Occ (
Configura-
tion
ALLM
RA.L.O
) for 5 minutes or RAT HI Alert Limit/
Occ (
Configuration
ALLM
RA.L.U
) for 10 minutes, then
an alert will be broadcast.
T305 (Return Air Temperature Above Limit)
If the return air temperature is below the RAT HI Alert Limit/
Occ (
Configuration
ALLM
RA.H.O
) for 5 minutes or RAT
HI Alert Limit/Occ (
Configuration
ALLM
RA.H.U
) for 10
minutes, then an alert will be broadcast. The alert will automat-
ically reset.
T308 (Return Air Relative Humidity Below Limit)
If the unit is configured to use a return air relative humidity
sensor through the Return Air RH Sensor (
Configuration
UNIT
SENS
RRH.S
) setting, and the measured level is
below the configurable RH Low Alert Limit (
Configuration
ALLM
R.RH.L
) for 5 minutes, then the alert will occur. The
unit will continue to run and the alert will automatically reset.
T309 (Return Air Relative Humidity Above Limit)
If the unit is configured to use a return air relative humidity
sensor through the Return Air RH Sensor (
Configuration
UNIT
SENS
RRH.S
) setting, and the measured level is
above the configurable RH High Alert Limit (
Configuration
ALLM
R.RH.H
) for 5 minutes, then the alert will occur.
Unit will continue to run and the alert will automatically reset.
T310 (Supply Duct Pressure Below Limit)
If the unit is a VAV unit with a supply duct pressure sensor and the
measured supply duct static pressure (
Pressures
AIR.P
SP
) is
below the configurable SP Low Alert Limit (
Configura-
tion
ALLM
SP.L
) for 5 minutes, then the alert will occur. The
unit will continue to run and the alert will automatically reset.
T311 (Supply Duct Pressure Above Limit)
If the unit is a VAV unit with a supply duct pressure sensor and the
measured supply duct static pressure (
Pressures
AIR.P
SP
)
is above the configurable SP Low Alert Limit (
Configura-
tion
ALLM
SP.H
) for 5 minutes, then the alert will occur. The
unit will continue to run and the alert will automatically reset.
T312 (Building Static Pressure Below Limit)
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 (
Configuration
ALLM
BP.L
). If the mea-
sured pressure (
Pressures
AIR.P
BP
) is below the limit for
5 minutes, then the alert will occur.
T313 (Building Static Pressure Above Limit)
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 (
Configuration
ALLM
BP.H
). If the mea-
sured pressure (
Pressures
AIR.P
BP
) is above the limit for
5 minutes, then the alert will occur.
T314 (IAQ Above Limit)
If the unit is configured to use a CO
2
sensor and the level (
In-
puts
AIR.Q
IAQ
) is above the configurable IAQ High
Alert Limit (
Configuration
ALLM
IAQ.H
) for 5 minutes,
then the alert will occur. The unit will continue to run and the
alert will automatically reset.
T316 (OAT Below Limit)
If the outside-air temperature measured by the OAT thermistor
(
Temperatures
AIR.T
OAT
) is below the configurable
OAT Low Alert Limit (
Configuration
ALLM
OAT.L
) for
5 minutes, then the alert will be broadcast.
T317 (OAT Above Limit)
If the outside-air temperature measured by the OAT thermistor
(
Temperatures
AIR.T
OAT
) is above the configurable
OAT High Alert Limit (
Configuration
ALLM
OAT.H
) for
5 minutes, then the alert will be broadcast.
T335 (Excess Outdoor Air)
When the control detects a stuck or jammed actuator, it will
compare the stuck position to the command position to log ad-
ditional alerts. If the stuck position > commanded position, the
alert is set.
A400 (Hydronic Freezestat Trip)
If the freezestat for the hydronic coil trips, the unit goes into
emergency mode and does not allow cooling or heating. The
economizer goes to 0% open. Supply fan operation is enabled.
Recovery is automatic when the switch goes off.
A404 (Fire Shut Down Emergency Mode [fire-smoke])
If the fire shutdown input is energized (fire shutdown is in ef-
fect), or if two fire smoke modes are incorrectly energized at
the same time, a Fire Shutdown mode will occur. This is an
emergency mode requiring the complete shutdown of the unit.
Recovery is automatic when the inputs are no longer on.
A405 (Evacuation Emergency Mode)
If the evacuation input on the CEM is energized, an evacuation
mode occurs which flags an alarm. This mode attempts to low-
er the pressure of the space to prevent smoke from moving into
another space. This is the reverse of the
Pressurization Mode
.
Closing the economizer, opening the return-air damper, turning
on the power exhaust, and shutting down the indoor fan will
decrease pressure in the space. Recovery is automatic when the
input is no longer on.
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 ...