Carrier WeatherExpert 48N2 Controls, Start-Up, Operation, Service, And Troubleshooting page 86

ITEM
DCV.C DCV ECONOMIZER SETPOINTS
EC.MN Economizer Min.Position
IAQ.M IAQ Demand Vent Min.Pos.
Economizer Min.Flow
O.C.MX
IAQ Demand Vent Min.Flow
O.C.MN
O.C.DB Econ.Min.Flow Deadband
AQ.CF AIR QUALITY CONFIGS
IQ.A.C IAQ Analog Sensor Config
IQ.A.F IAQ 4-20 ma Fan Config
IAQ Discrete Input Config
IQ.I.C
IAQ Disc.In. Fan Config
IQ.I.F
OQ.A.C OAQ 4-20ma Sensor Config
AQ.SP AIR QUALITY SETPOINTS
IQ.O.P IAQ Econo Override Pos.
IQ.O.C IAQ Override Flow
Diff.Air Quality LoLimit
DAQ.L
Diff. Air Quality HiLimit
DAQ.H
D.F.OF DAQ PPM Fan Off Setpoint
D.F.ON DAQ PPM Fan On Setpoint
IAQ.R Diff. AQ Responsiveness
OAQ.L OAQ Lockout Value
User Determined OAQ
OAQ.U
AIR QUALITY SENSOR RANGE
AQ.SR
IQ.R.L IAQ Low Reference
IQ.R.H IAQ High Reference
OQ.R.L OAQ Low Reference
OQ.R.H OAQ High Reference
IAQ PRE-OCCUPIED PURGE
IAQ.P
IAQ Purge
IQ.PG
IQ.P.T IAQ Purge Duration
IQ.P.L IAQ Purge LoTemp Min Pos
IQ.P.H IAQ Purge HiTemp Min Pos
IQ.L.O IAQ Purge OAT Lockout
• IQ.A.C = 3 (4 to 20 mA minimum position) — With a 4 to
20 mA signal connected to TB201 terminal 7 and 8, the
economizer minimum position will be scaled linearly from
0% (4 mA) to EC.MN (20 mA).
• IQ.A.C = 4 (10K potentiometer minimum position) — With
a 10K linear potentiometer connected to TB201 terminal 7
and 8, the economizer minimum position will be scaled lin-
early from 0% (0 ohms) to EC.MN (10,000 ohms).
IAQ Analog Fan Config (Configuration  IAQ  AQ.CF 
IQ.A.F)
This is used to configure the control of the indoor fan. If this
option is used, the IAQ sensor must be in the space and not in
the return duct. It has the following configurations:
• IQ.A.F = 0 (No Fan Start) — IAQ demand will never
override normal indoor fan operation during occupied or
unoccupied period and turn it on.
• IQ.A.F = 1 (Fan On If Occupied) — IAQ demand will
override normal indoor fan operation and turn it on (if off)
only during the occupied period (CV operation with auto-
matic fan).
• IQ.A.F = 2 (Fan On Occupied/Unoccupied) — IAQ de-
mand will always override normal indoor fan operation and
turn it on (if off) during both the occupied and unoccupied
period. For IQ.A.F = 1 or 2, the fan will be turned on as de-
scribed above when DAQ is above the DAQ Fan On Set
Point (Configuration  IAQ  AQ.SP  D.F.ON). The fan
will turn off when DAQ is below the DAQ Fan Off Set
Point (Configuration  IAQ  AQ.SP  D.F.OF). The con-
trol can be set up to respond to a discrete IAQ input. The
discrete input is connected to TB202 terminal 12 and 13.
Table 57 — Indoor Air Quality Configuration
EXPANSION RANGE UNITS
0 to 100 %
0 to 100 %
0 to 20000 CFM
0 to 20000 CFM
200 to 1000 CFM
0 to 4
0 to 2
0 to 2
0 to 2
0 to 2
0 to 100 %
0 to 31000 CFM
0 to 1000
100 to 2000
0 to 2000
0 to 2000
-5 to 5
0 to 2000
0 to 5000
0 to 5000
0 to 5000
0 to 5000
0 to 5000
No/Yes
5 to 60 min
0 to 100 %
0 to 100 %
35 to 70 dF
IAQ Discrete Input Config (Configuration  IAQ  AQ.CF
 IQ.I.C)
This configuration is used to set the type of IAQ sensor. The
following are the options:
• IQ.I.C = 0 (No Discrete Input) — This is used to indicate
that no discrete input will be used and the standard IAQ
sensor input will be used.
• IQ.I.C = 1 (IAQ Discrete Input) — This will indicate that
the IAQ level (high or low) will be indicated by the dis-
crete input. When the IAQ level is low, the economizer
minimum position
IAQ  DCV.C  IAQ.M.
• IQ.I.C = 2 (IAQ Discrete Input with Minimum Position
Override) — This will indicate that the IAQ level (high or
low) indicated by the discrete input and the economizer
minimum position will be the IAQ override position,
IQ.P.O (when high). It is also necessary to configure how
the fan operates when using the IAQ discrete input.
IAQ Discrete Fan Config (Configuration  IAQ  AQ.CF
 IQ.I.F)
This is used to configure the operation of the fan during an
IAQ demand condition. It has the following configurations:
• IQ.I.F = 0 (No Fan Start) — IAQ demand will never over-
ride normal indoor fan operation during occupied or unoc-
cupied period and turn it on.
• IQ.I.F = 1 (Fan On If Occupied) — IAQ demand will
override normal indoor fan operation and turn it on (if off)
only during the occupied period (CV operation with auto-
matic fan).
86
CCN POINT DEFAULT
ECONOMIN
IAQMINP
OACFMMAX
OACFMMIN
OACFM_DB
IAQANCFG
IAQANFAN
IAQINCFG
IAQINFAN
OAQANCFG
IAQOVPOS
IAQOVCFM 10000
DAQ_LOW
DAQ_HIGH
DAQFNOFF
DAQFNON
IAQREACT
OAQLOCK
OAQ_USER
IAQREFL
IAQREFH
OAQREFL
OAQREFH
IAQPURGE
IAQPTIME
IAQPLTMP
IAQPHTMP
IAQPNTLO
will be Configuration 
5
0
2000
0
400
0
0
0
0
0
100
100
700
200
400
0
0
400
0
2000
0
2000
No
15
10
35
50