Carrier WeatherExpert 48N2 User Manual

85
Table 57 — Indoor Air Quality Configuration
IAQ Low Reference (
Configuration  IAQ  AQ.S.R 
IQ.R.L) — This is the reference that will be used with a to
non-Carrier IAQ sensor that may have a different characteristic
curve. It represents the CO
2
level at 4 mA.
IAQ High Reference (
Configuration  IAQ  AQ.SR
 IQ.R.H) — This is the reference that will be used with a
non-Carrier IAQ sensor that may have a different characteristic
curve. It represents the CO
2
level at 4 mA.
OAQ Low Reference (
Configuration  IAQ  AQ.S.R
 OQ.R.L) — This is the reference that will be used with a
non-Carrier OAQ sensor that may have a different characteris-
tic curve. It represents the CO
2
level at 4 mA.
OAQ High Reference (
Configuration  IAQ  AQ.S.R 
OQ.R.H) — This is the reference that will be used with a non-
Carrier OAQ sensor that may have a different characteristic
curve. It represents the CO
2
level at 4 mA.
Diff. IAQ Responsiveness (
Configuration  IAQ  AQ.SP
 IAQ.R) — This is the configuration that is used to select the
IAQ response curves as shown in Fig. 18.
PRE-OCCUPANCY PURGE — The control has the option
for a pre-occupancy purge to refresh the air in the space prior to
occupancy.
This feature is enabled by setting Configuration
 IAQ 
IAQ.P  IQ.PG to Yes.
The IAQ Purge will operate under the following conditions:
• IQ.PG is enabled
• the unit is in the unoccupied state
• Current Time is valid
• Next Occupied Time is valid
• time is within two hours of the next occupied period
• time is within the purge duration (Configuration

IAQ  IAQ.P  IQ.P.T)
If all of the above conditions are met, the following logic is
used:
If OAT  IQ.L.O and OAT  OCSP and economizer is
available then purge will be enabled and the economizer will
be commanded to 100%.
Else, if OAT < IQ.L.O then the economizer will be posi-
tioned to the IAQ Purge LO Temp Min Pos (Configuration

IAQ  IAQ.P  IQ.P.L)
If neither of the above are true then the dampers will be
positioned to the IAQ Purge HI Temp Min Pos (Configuration
 IAQ  IAQ.P  IQ.P.H)
If this mode is enabled the indoor fan and heat interlock
relay (VAV) will be energized.
IAQ Purge (
Configuration  IAQ  IAQ.P  IQ.PG) — This
is used to enable IAQ pre-occupancy purge.
IAQ Purge Duration (
Configuration  IAQ  IAQ.P 
IQ.P.T) — This is the maximum amount of time that a purge
can occur.
IAQ Purge Lo Temp Min Pos (
Configuration  IAQ 
IAQ.P  IQ.P.L) — This is used to configure a low limit for
damper position to be used during the purge mode.
IAQ Purge Hi Temp Min Pos (
Configuration  IAQ 
IAQ.P  IQ.P.H) — This is used to configure a maximum po-
sition for the dampers to be used during the purge cycle.
IAQ Purge OAT Lockout Temp (
Configuration  IAQ 
IAQ.P  IQ.L.O) — Nighttime lockout temperature below
which the purge cycle will be disabled.
OPTIONAL AIRFLOW STATION — The ComfortLink
controls are capable of working with a factory-installed option-
al airflow station that measures the amount of outdoor air enter-
ing the economizer. This flow station is intended to measure
ventilation airflows and has a limitation as to the maximum
flow rate it can measure. The limits are 52,500 cfm for sizes
75-105 ton units. The limit is 60,000 cfm for 120-150 ton units.
All configurations for the outdoor airflow station can be
found in the Configuration
 ECON  CFM.C, sub-menu.
For this algorithm to function, the Outdoor Air Cfm Sensor
Configuration (OCF.S.) must be enabled.
There are three set point configurations:
O.C.MN — Econ OACFM DCV Min Flow
O.C.MX — Econ OACFM DCV Max Flow
O.C.DB — Econ OACFM MinPos Deadbd
ITEM EXPANSION RANGE UNITS CCN POINT DEFAULT
DCV.C DCV ECONOMIZER SETPOINTS
EC.MN Economizer Min.Position 0 - 100 % ECONOMIN 5
IAQ.M IAQ Demand Vent Min.Pos. 0 - 100 % IAQMINP 0
O.C.MX Economizer Min.Flow 0 - 20000 CFM OACFMMAX 2000
O.C.MN IAQ Demand Vent Min.Flow 0 - 20000 CFM OACFMMIN 0
O.C.DB Econ.Min.Flow Deadband 200 - 1000 CFM OACFM_DB 400
AQ.CF AIR QUALITY CONFIGS
IQ.A.C IAQ Analog Sensor Config 0 - 4 IAQANCFG 0
IQ.A.F IAQ 4-20 ma Fan Config 0 - 2 IAQANFAN 0
IQ.I.C IAQ Discrete Input Config 0 - 2 IAQINCFG 0
IQ.I.F IAQ Disc.In. Fan Config 0 - 2 IAQINFAN 0
OQ.A.C OAQ 4-20ma Sensor Config 0 - 2 OAQANCFG 0
AQ.SP AIR QUALITY SETPOINTS
IQ.O.P IAQ Econo Override Pos. 0 - 100 % IAQOVPOS 100
IQ.O.C IAQ Override Flow 0 - 31000 CFM IAQOVCFM 10000
DAQ.L Diff.Air Quality LoLimit 0 - 1000 DAQ_LOW 100
DAQ.H Diff. Air Quality HiLimit 100 - 2000 DAQ_HIGH 700
D.F.OF DAQ PPM Fan Off Setpoint 0 - 2000 DAQFNOFF 200
D.F.ON DAQ PPM Fan On Setpoint 0 - 2000 DAQFNON 400
IAQ.R Diff. AQ Responsiveness -5 - 5 IAQREACT 0
OAQ.L OAQ Lockout Value 0 - 2000 OAQLOCK 0
OAQ.U User Determined OAQ 0 - 5000 OAQ_USER 400
AQ.S.R AIR QUALITY SENSOR RANGE
IQ.R.L IAQ Low Reference 0 - 5000 IAQREFL 0
IQ.R.H IAQ High Reference 0 - 5000 IAQREFH 2000
OQ.R.L OAQ Low Reference 0 - 5000 OAQREFL 0
OQ.R.H OAQ High Reference 0 - 5000 OAQREFH 2000
IAQ.P IAQ PRE-OCCUPIED PURGE
IQ.PG IAQ Purge Yes/No IAQPURGE No
IQ.P.T IAQ Purge Duration 5 - 60 min IAQPTIME 15
IQ.P.L IAQ Purge LoTemp Min Pos 0 - 100 % IAQPLTMP 10
IQ.P.H IAQ Purge HiTemp Min Pos 0 - 100 % IAQPHTMP 35
IQ.L.O IAQ Purge OAT Lockout 35 - 70 dF IAQPNTLO 50

Carrier WeatherExpert 48N2 Specifications

General

Brand	Carrier
Model	WeatherExpert 48N2
Category	Air Conditioner
Language	English