Carrier WEATHERMAKER 48J - Page 70

ITEM
DCVC
EC.MN
IAQ.M
AQ.CF
IQ.A.C
IQ.A.F
IQ.LC
IQ.LF
OQ.A.C
AQ.SP
IQ.O.P
DAQ.L
DAQ.H
D.F.OF
D.F.ON
IAQ.R
OAQ.L
OAQ.U
AQ.S.R
IQ.R.L
IQ.R.H
OQ.R.L
OQ.R.H
IAQ.P
IQ.PG
IQ.P.T
IQ.P.L
IQ.P.H
IQ.L.O
Table 84 -- Indoor Air Quality Configuration
EXPANSION
DCV ECONOMIZER SETPOINTS
Economizer Min.Position
IAQ Demand Vent Min.Pos.
AIR QUALITY CONFIGS
IAQ Analog Sensor Config
IAQ 4-20 ma Fan Config
IAQ Discrete Input Config
IAQ Disc.In. Fan Config
OAQ 4-20ma Sensor Config
] RANGE ] UNITS
O - 100 %
0 - 100 %
0-4
0-2
0-2
0-2
0-2
AIR QUALITY SETPOINTS
IAQ Econo Override Pos.
Dill.Air Quality LoLimit
Diff. Air Quality HiLimit
DAQ PPM Fan Off Setpoint
DAQ PPM Fan On Setpoint
Diff. AQ Responsiveness
OAQ Lockout Value
User Determined OAQ
0-100
0-1000
100-2000
0-2000
0-2000
-5-5
0-2000
0-5000
AIR QUALITY SENSOR RANGE
IAQ Low Reference
IAQ High Reference
OAQ Low Reference
OAQ High Reference
IAQ PRE-OCCUPIED PURGE
IAQ Purge
IAQ Purge Duration
IAQ Purge LoTemp Min Pos
IAQ Purge HiTemp Min Pos
IAQ Purge OAT Lockout
0-5000
0-5000
0-5000
0-5000
Yes/No
5 - 60
0 - 100
0 - 100
35 - 70
I CON POINT I DEFAULT
I ECONOMIN
IAQMINP
IAQANCFG
IAQANFAN
IAQINCFG
IAQINFAN
OAQANCFG
% IAQOVPOS
DAQ LOW
DAQ HIGH
DAQFNOFF
DAQFNON
IAQREACT
OAQLOCK
OAQ USER
IAQREFL
IAQREFH
OAQREFL
OAQREFH
rain I IAQPURGE
IAQPTIME
iF IAQPLTMP
IAQPHTMP
IAQPNTLO
5
Io
o
o
o
o
o
1oo
1oo
7oo
2oo
4oo
o
o
4oo
o
2000
o
2000
No
15
10
35
5O
Table 85 -- Dehumidification Configuration
ITEM
DEHU
D.SEL
D.SEN
D.EC.D
D.VCF
D.VRA
D.VHT
D.C.SP
D.RH.S
EXPANSION
DEHUMIDIFICATION CONFIG.
Dehumidification Config
Dehumidification Sensor
Econ disable in DH mode?
Vent Reheat Setpt Select
Vent Reheat RAT offset
Vent Reheat Setpoint
Dehumidify Cool Setpoint
Dehumidify RH Setpoint
Vent Reheat Set Point Select (D. V.CF) -- This configuration
determines how the vent reheat set point is selected.
• D.V..(T = 0 -- Reheat follows an offset subtracted from
return air temperature (D. V.RA).
• D.V..(T = 1 -- Reheat follows a dehumidification heat
set point (D. V..HT).
Vent Reheat RAT Offset (D. V..RA) -- Set point offset used
only during the vent mode. The air will be reheated to return-
air temperature less this offset.
Vent Reheat Set Point (D. V..HT) -- Set point used only dur-
ing the vent mode. The air will be reheated to this set point.
Dehumidify Cool Set Point (D.C.SP) -- This is the dehu-
midification cooling set point.
Dehumidity RH Set Point (D.RH.S) -- This is the dehumidi-
fication relative humidity trip point.
OPERATION -- Dehumidification and reheat can only occur
if the unit is equipped with either staged gas or hydronic heat.
Dehumidification without reheat can be done on any unit but
Configuration--+DEHU--+D.SEL must be set to 2.
If the machine's control type is a TSTAT type (Configura-
tion-+UNIT_C TYP=-3 or 4) and the discrete input selection
for the sensor is not configured (D.SEN not equal to 2),
dehumidification will be disabled.
If the machine's control type is a TSTAT type ((bnfigura-
tion--+UNIT4:TYP=-3 or 4) and the economizer is able to
provide cooling, a dehumidification mode may be called out,
but the control will not request mechanical cooling.
If a 2-stage control type is selected ((bnfiguration--+UNIT
4: !TP = 4 or 6), then the economizer, if active, locks out
mechanical cooling during the Dehumidification mode.
I RANGE I UNITS I CCNPOINT I DEFAULT
0-2
1-2
Yea/No
i_ 95 dFdeltaFdF
I 10-90 %
I
DHSELECT ?
DHSENSOR
DHECDISA _es
DHVHTCFG
DHVRAOFF
DHVHT SP _
DHCOOLSP 45
DHRELHSP
NOTE: Configuring Configuration-+DEHU-+D.SENto 1 or
2 will enable the CEM board along with the sensor selected for
control.
NOTE: If (bnfiguration--+DEHU--+D.SEL = 1 or 2, then
staged gas control will be automatically enabled (Configura-
tion-+HEAT-+HT.CF will be set to 3).
If a tempering, unoccupied or "mechanical cooling locked
out" HVAC mode is present, dehumidification will be disabled.
An HVAC Off, Vent or Cool mode must be in effect to launch
either a Reheat or Dehumidification mode.
If an associated sensor responsible for dehumidification
fails, dehumidification will not be attempted (SPRH, RARH).
Initiating a Reheat or Dehumidification Mode -- To call out
a Reheat mode in the Vent or the Off HVAC mode, or to call
out a Dehumidification mode in a Cool HVAC mode, one of
the following conditions must be true:
• The space is occupied and the humidity is greater than
the relative humidity trip point (D.RH.S).
• The space is occupied and the discrete humidity input is
closed.
Dehumidification and Reheat Control -- If a dehumidifica-
tion mode is initiated, the rooftop will attempt to lower
humidity as follows:
• Economizer Cooling -- The economizer, if allowed to
perform free cooling, will have its control point (Run
Status-+VIEW--+EC C P) set to Configuration---_DEHU
--+D.C.SP If Configuration--+DEHU-+D.EC.D is dis-
abled, the economizer will always be disabled during
dehmnidification.
• Cooling -- For all cooling control types: A High Cool
HVAC mode will be requested internally to the control to
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