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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 88.
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
Table 88 — Sensor Trim Configuration
IMPORTANT: Sensor trim must not be used to extend
unit operation past the allowable operating range.
Doing so may void the warranty.
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
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
Summary of Contents for WEATHERMAKER 48/50AJ
Page 103: ...103 Fig 15 Typical Main Control Box Wiring Schematic 48 50AJ AK AW AY Units cont a48 8355 ...
Page 104: ...104 Fig 16 Typical Main Control Box Wiring Schematic 48 50A2 A3 A4 A5 Units a48 8355 ...
Page 105: ...105 TO NEXT PAGE Fig 17 Typical Auxiliary Control Box Wiring Schematic A48 7294 ...
Page 106: ...106 Fig 17 Typical Auxiliary Control Box Wiring Schematic cont a48 8356 ...
Page 107: ...107 Fig 18 Typical 2 Stage Gas Heat Wiring Schematic Size 051 and 060 Units Shown a48 8357 ...
Page 113: ...113 Fig 22 Typical Power Schematic 48 50A2 A3 A4 A5060 Unit Shown ...
Page 114: ...114 SW1 SW2 OR DEHUMIDIFY SWITCH Fig 23 Typical Controls Option Wiring Schematic a48 8361 ...
Page 115: ...115 Fig 24 Typical Small Chassis Component Location Size 020 035 Units a48 8362 ...
Page 116: ...116 Fig 25 Typical Large Chassis Component Locations Size 036 060 Units A48 7302 ...
Page 169: ...169 APPENDIX C VFD INFORMATION cont Fig F Internal Enclosure Fan Replacement A48 7716 ...