Carrier WeatherExpert 48LC Installation Instructions Manual page 37

Single package rooftop gas heat/electric cooling unit with puronr (r ---410a) refrigerant size: 07
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Parameter
SYSTEM
INSTALL
SETUP
UNITS DEG
EQUIPMENT
AUX2 I
FAN TYPE
FAN CFM
AUX OUT
OCC
FACTORY DEFAULT
ADVANCED
MA LO SET
SETUP
FREEZE POS
CO2 ZERO
CO2 SPAN
STG3 DLY
SD DMPR POS
DCVCAL ENA
MATTCAL
OA T CAL
OA H CAL
RA T CAL
RA H CAL
DA T CAL
2SP FAN DELAY
Table 8 - - Menu Structure* (cont)
Parameter
Parameter
Default
Range and Increment
Value
01/01/10
_F or _C
_F
CONV
Conventional or HP
W
W required for 2 ---speed
mode
2speed
2speed required
5000cfm
100 to 15000 cfm;
increment by 100
NONE
NONE
EXH2
SYS
INPUT
INPUT or ALWAYS
NO
NO or YES
45_F
35 to 55_F;
(7_C)
(2 to 12_C)
Incremented by 1_
CLO
CLO or MIN
0ppm
0 to 500 ppm:
Increment by 10
2000ppm
1000 to 3000 ppm;
Increment by 50
2.0h
0 min, 5 min, 15 min,
then 15 min intervals.
Up to 4 h or OFF
CLO
CLO or OPN
MAN
MAN (manual)
0.0_F
+/ ---2.5_F
(or C)
(+/ ---1.4_C)
1.0_F
+/ ---2.5_F
(or C)
(+/ ---1.4_C)
0% RH
+/ ---10% RH
2.0_F
+/ ---2.5_F
(or C)
(+/ ---1.4_C)
0% RH
+/ ---10% RH
0.0_F
+/ ---2.5_F
(or C)
(+/ ---1.4_C)
5 Minutes
0 to 20 minutes in
1 minute increments
EXPANDED PARAMETER NAME
{
Display order = MM/DD/YY
Setting order = DD, MM, then YY .
Sets economizer controller in degrees Fahrenheit or Celsius.
CONV = conventional;
HP O/B = Enable Heat Pump mode. Not available with 2---speed
See Menu Note 4
W = Informs controller that system is in heating mode.
SD = Enables configuration of shutdown (not available on 2---Speed)
See Menu Note 4
Sets the economizer controller for operation of 1 speed or 2 speed indoor
fan system.
See Menu Note 4.
UNIT DESIGN AIRFLOW (CFM)
Enter ONLY of using DCVCAL ENA = AUTO
The value is found in the Project Submittal documents for the specific RTU.
Select OUTPUT for AUX1 O relay
NONE =
not configured (output is not used)
EXH2 =
second damper position relay closure for second
exhaust fan
SYS =
use output as an alarm signal
OCCUPIED MODE BY EXTERNAL SIGNAL
When using a setback thermostat with occupancy out (24 Vac), the 24 Vac
is input to the OCC terminal. RTU control circuit provides 24---Vac to OCC
through OCCUPIED terminals on Integrated Staging Control. Board
Resets all set points to factory defaults when set to YES. LCD will briefly
flash YES and change to NO but all parameters will change to the factory
default values. RECHECK AUX2 I and FANTYPE for required 2---speed
values.
SUPPLY AIR TEMPERATURE LOW LIMIT
Temperature to achieve Freeze Protection (close damper and alarm if
temperature falls below setup value)
FREEZE PROTECTION DAMPER POSITION
Damper position when freeze protection is active
CLO = closed
MIN = MIN POS or VENTMAX
CO
ppm level to match CO
Sensor start level.
2
2
CO
ppm span to match CO
sensor.
2
2
COOLING STAGE 3 DELAY
Delay after stage 2 for cool has been active. Turns on 2
st
when economizer is 1
stage and mechanical cooling is 2
Function NOT AVAILABLE with 2---speed mode
Turns on the DCV automatic control of the dampers. Resets ventilation.
SUPPLY AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration supply air
temperature (SAT) sensor
OUTSIDE AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration outside air
temperature (OAT) sensor
OUTSIDE AIR HUMIDITY CALIBRATION
Allows for the operator to adjust for an out of outside air enthalpy sensor
RETURN AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration return air
temperature (RA) sensor
RETURN AIR HUMIDITY CALIBRATION
Allows for the operator to adjust for an out of calibration return air enthalpy
sensor
DISCHARGE AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration discharge air
temperature (DAT) sensor
nd
TIME DELAY ON 2
STAGE ECONOMIZING
While in the Economizing mode, this is the delay between thermostat Y2
call and Y1---O output to mechanical cooling stage, to allow high speed fan
operation to attempt to cool space first.
37
Notes
nd
stage of cooling
nd

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