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76
SAT Settling Time
(SAT.T)
The amount of time (in seconds) the economizer reported posi
-
tion must remain unchanged (±
EC.MD
) before the control will
attempt to detect a mechanically disconnected actuator. This is
to allow SAT to stabilize at the current economizer position.
This configuration sets the settling time of the supply-air tem
-
perature (SAT). This typically tells the control how long to
wait after a stage change before trusting the SAT reading and
has been reused for Title 24 purposes.
Economizer Deadband Temp
(AC.EC)
The allowed deadband between measured SAT and calculated
SAT when performing economizer self-test. Range is 0 to 10,
default is 4.
Econ Fault Detect Gap
(E.GAP)
The discrepancy between actuator command and reported posi
-
tion in %. Used to detect actuator stuck/jammed. Range is 2 to
100, default is 5.
Econ Fault Detect Timer
(E.TMR)
The timer for actuator fault detection in seconds. Used to de
-
tect actuator stuck/jammed. Range is 10 to 240, default is 20.
Excess Air CFM
(X.CFM)
The max allowed excess air in CFM. Used to detect excess out
-
side air. Range is 400 to 4000, default is 800.
Excess Air Detect Timer
(X.TMR)
The timer for excess air detection with a range of 30 to 240.
Default is 150.
T24 AutoTest SF Run Time
(AC.MR)
Amount of time to run supply fan before sampling torque or
making torque comparison. Range is 1 to 10, default is 2.
T24 Auto-Test VFD Speed
(AC.SP)
Speed to run VFD during economizer auto-component test.
Range is 10 to 50, default is 20.
T24 Auto-Test Econ % Open (AC.OP)
Amount to open each economizer during auto-component test.
Range is 1 to 100. Default is 30.
T24 Auto-Test VFD % Change
(VF.PC)
The expected change in torque when damper opens from 0 to
AC.OP
and then from
AC.OP
to 0. Range is 1 to 20, default is 10.
Econ Auto-Test Day (EC.DY)
The day on which to perform automatic economizer test.
Range=NEVER, MON, TUE, WED, THR, FRI, SAT, SUN.
Default is SAT.
Econ Auto=Test Time (EC.TM)
The time at which to perform automatic economizer test. The
range is 0 to 23, default is 2.
SETTING UP THE SYSTEM
The economizer configuration options are under the Local Dis
-
play Mode
Configuration
ECON.
Table 54 —
Economizer Configuration Table
ITEM
EXPANSION
RANGE
UNITS
CCN POINT
DEFAULT
EC.EN
Economizer Installed?
No/Yes
ECON_ENA
Yes
EC.MN
Economizer Min.Position
0 to 100
%
ECONOMIN
5
EC.MX
Economizer Max.Position
0 to 100
%
ECONOMAX
98
E.TRM
Economzr Trim For SumZ?
No/Yes
ECONTRIM
Yes
E.SEL
Econ ChangeOver Select
0 to 3
ECON_SEL
0
DDB.O
Diff Dry Bulb RAT Offset
0, -2, -4, -6
dF
EC_DDBCO
0
OA.E.C
OA Enthalpy ChgOvr Selct
1 to 5
OAEC_SEL
4
OA.EN
Outdr.Enth Compare Value
18 to 28
OAEN_CFG
24
OAT.L
High OAT Lockout Temp
–40 to 120
dF
OAT_LOCK
60
O.DEW
OA Dewpoint Temp Limit
50 to 62
dF
OADEWCFG
55
ORH.S
Outside Air RH Sensor
Disable/Enable
OARHSENS
Disable
CFM.C
OUTDOOR AIR CFM CONTROL
OCF.S
Outdoor Air CFM Sensor
0 to 2
OCFMSENS
0
O.C.MX
Economizer Min.Flow
0 to 25000
CFM
OACFMMAX
2000
O.C.MN
IAQ Demand Vent Min.Flow
0 to 20000
CFM
OACFMMIN
0
O.C.DB
Econ.Min.Flow Deadband
200 to 1000
CFM
OACFM_DB
400
OA.RR
OACFM Econ Ctrl Run Rate
3 to 120
sec
OCFMECRT
20
OA.MP
OACFM Econ Ctrl Min Pos
0 to 10
%
OCFMECMN
0
EN.DO
Enable DCFM/OACFM Clamp
No/Yes
EN_DOCFM
Yes
E.SAC
Enable Single Act CFM
No/Yes
ENSACFMC
No
S.MX.C
Single Act. Max CFM
0 to 20000
CFM
SAMAXCFM
7500
S.M.DB
Single Act. Max CFM DB
0 to 5000
CFM
SAMAXCDB
2500
E.CFG
ECON.OPERATION CONFIGS
E.P.GN
Economizer Prop.Gain
0.7 to 3.0
EC_PGAIN
1
E.RNG
Economizer Range Adjust
0.5 to 5
^F
EC_RANGE
2.5
E.SPD
Economizer Speed Adjust
0.1 to 10
EC_SPEED
0.75
E.DBD
Economizer Deadband
0.1 to 2
^F
EC_DBAND
0.5
UEFC
UNOCC.ECON.FREE COOLING
FC.CF
Unoc Econ Free Cool Cfg
0 to 2
UEFC_CFG
0
FC.TM
Unoc Econ Free Cool Time
0 to 720
min
UEFCTIME
120
FC.L.O
Un.Ec.Free Cool OAT Lock
40 to 70
dF
UEFCNTLO
50
ACT.C
ECON.ACTUATOR CONFIGS
SN.1.1
Econ 1 Out Ser Number 1
0-9999
ECN1_SN1
0
SN.1.2
Econ 1 Out Ser Number 2
0-6
ECN1_SN2
0
SN.1.3
Econ 1 Out Ser Number 3
0-9999
ECN1_SN3
0
Summary of Contents for WeatherExpert 48N2
Page 135: ...135 Fig 18 48 50N Typical Power Schematic Nominal 075 Ton Unit Shown ...
Page 136: ...136 Fig 19 48 50N Typical Power Schematic Nominal Ton 90 150 Units Shown ...
Page 137: ...137 Fig 20 48 50N Main Base Board Input Output Connections ...
Page 138: ...138 Fig 21 48 50N RXB EXB CEM Input Output Connections a48 9307 ...
Page 139: ...139 Fig 22 48 50N EXV SCB Input Output Connections a48 9308 ...
Page 140: ...140 Fig 23 48N Typical Modulating Gas Heat Unit Control Wiring ...
Page 141: ...141 Fig 24 50N Typical Electric Heat Unit Control Wiring ...
Page 144: ...144 Fig 27 48N Typical Gas Heat Section Wiring Nominal Ton 120 to 150 Units ...
Page 145: ...145 Fig 28 48 50N Typical Power Component Control Wiring 460 v ...
Page 146: ...146 Fig 29 48 50N Component Control Wiring 575 v Nominal Ton 075 to 150 Units ...
Page 147: ...147 Fig 30 48 50N Component Arrangement Power Box ...
Page 148: ...148 Fig 31 48 50N Component Arrangement Control Box ...
Page 240: ...240 APPENDIX D VFD INFORMATION CONT Fig G VFD Bypass Wiring Diagram WHEN USED ...