Carrier WeatherExpert 50LC14 - Page 48

48
Table 7 — W7220 Menu Structure*
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
†
EXPANDED PARAMETER NAME/NOTES
STATUS
ECON AVAIL NO YES/NO
ECONOMIZING AVAILABLE
YES = economizing available; the system can use outside air for free cool-
ing when required
ECONOMIZING NO YES/NO
ECONOMIZING ACTIVE
YES = outside air being used for 1 stage cooling
NO = economizing not active
OCCUPIED NO YES/NO
OCCUPIED
YES = OCC signal received from space thermostat or
unitary controller
YES = 24 Vac on terminal OCC
NO = 0 Vac on terminal OCC
HEAT PUMP N/A**
COOL
HEAT
HEAT PUMP MODE
(Not available on 2-speed configuration)
CO
OL Y1—IN OFF ON/OFF
FIRST STAGE COOLING DEMAND (Y1-IN)
Y1–I signal from space thermostat or unitary controller for cooling stage 1.
ON = 24 Vac on terminal Y1–I
OFF = 0 Vac on terminal Y1–I
COOL Y1—OUT OFF ON/OFF
FIRST STAGE COOLING RELAY OUTPUT
ON = 24 Vac on terminal Y1-O; Stage 1 mechanical cooling called on
OFF = 0 Vac on terminal Y1-O; no mechanical cooling
COOL Y2—IN OF
F ON/OFF
SE
COND STAGE COOLING DEMAND (Y2–IN)
Y2–I signal from space thermostat or unitary controller for cooling stage 2.
ON = 24 Vac on terminal Y2–I
OFF = 0 Vac on terminal Y2–I
COOL Y2—OUT OFF ON/OFF
SECOND STAGE COOLING RELAY OUTPUT
ON = 24 Vac on terminal Y2-O; Stage 2 mechanical cooling called on
OFF = 0 Vac on terminal Y2-O; no Stage 2 mechanical cooling
MA TEMP nn°F (or °C)
0 to 140°F
(-18 to 60°C)
SUPPLY AIR TEMPERATURE, Cooling Mode
Displays value of measured mixed air from SAT sensor in fan section.
Displays _ _ . _ if not connected, short or out-of-range. See Note 2.
DA TEMP nn°F (or °C)
0 to 140°F
(-18 to 60°C)
DISCHARGE AIR TEMPERATURE
, after Heating section
(Accessory sensor required)
Displays when Discharge Air sensor is connected and displays measured
discharge temperature.
Displays _ _ . _ if sensor sends invalid value, if not connected, short or
out-of-range.
OA TEMP nn
°F (or °C)
-40 to 140°F
(-40 to 60°C)
OUTSIDE AIR TEMP
Displays measured value of outdoor air temperature.
Displays _ _ . _ if sensor sends invalid value, short or out-of-range.
OA HUM nn% 0 to 100%
OUTSI
DE AIR RELATIVE HUMIDITY
Displays measured value of outdoor humidity from OA enthalpy sensor.
RA TEMP nn
°F (or °C)
0 to 140°F
(-18 to 60°C)
RETURN AIR TEMPERATURE
(Accessory sensor required)
Displays measured value of return air temperature from RAT sensor.
RA HUM nn% 0 to 100%
RETURN AIR RELATIVE HUMIDITY
(Accessory enthalpy sensor required)
Displays measured value of return air humidity from RA sensor.
IN CO2 _ _ _ ppm 0 TO 2000 ppm
SPACE/RETUR
N AIR CO
2
(CO
2
sensor required, accessory or factory option)
Displays value of measured CO
2
from CO
2
sensor.
Invalid if not connected, short or out-of-range
DCV STATUS N/A ON/OFF
DEMAND CONTROLLED VENTILATION STATUS
(CO
2
sensor required, accessory or factory option)
Displays ON if IN CO
2
value above setpoint DCV SET and OFF if below
setpoint DCV SET.
DAMPER OUT 2.0V 2.0 TO 10.0v
Displays voltage output to the damper actuator.
2.0V = OSA damper fuily closed
10.0V = OSA damper fully open
ACT POS nn% 0 to 100%
Displays actual position of outdoor air damper actuator
0% = OSA damper fuily closed
100% = OSA damper fully open