Carrier WeatherMaster Puron 48HC D17, Service And Maintenance Instructions, Page: 58 / 100

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located after the cooling coil, in the fan section, where it is desig-
nated as (Cooling) Supply Air Temperature or SAT sensor.
SETUP AND CONFIGURATION
Before being placed into service, the W7220 Economizer mod-
ule must be set up and configured for the installed system.
The setup process uses a hierarchical menu structure that is
easy to use. Press the ▲ and ▼ arrow buttons to move forward
and backward through the menus and press the button to select
and confirm setup item changes.
Time-Out and Screensaver
When no buttons have been pressed for 10 minutes, the LCD
displays a screen saver, which cycles through the Status items.
Each Status items displays in turn and cycles to the next item
after 5 seconds.
IMPORTANT: During setup, the economizer module is
live at all times.
Table 26 — W7220 Menu Structure*
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT †
EXPANDED PARAMETER NAME
Notes
STATUS
ECON AVAIL NO YES/NO
FIRST STAGE COOLING DEMAND (Y1–IN)
YES = economizing available; the system can use outside air for
free cooling when required
ECONOMIZING NO YES/NO
FIRST STAGE COOLING RELAY OUTPUT
YES = outside air being used for first stage cooling
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
Displays COOL or HEAT when system is set to heat pump
(Non-conventional)
COOL 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
Cool stage 1 Relay Output to stage 1 mechanical cooling
(Y1–OUT terminal)
COOL Y2—IN OFF ON/OFF
SECOND STAGE COOLING DEMAND (Y2–IN)
Y2–I signal from space thermostat or unitary controller for
second stage cooling.
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
Cool Stage 2 Relay Output to mechanical cooling
(Y2–OUT terminal)
MA TEMP
_ _ . _ °F
(or _ _ . _ °C)
–40°F to 150°F
(–40°C to 66°C)
SUPPLY AIR TEMPERATURE, Cooling Mode
Displays value of measured mixed air from MAT sensor.
Displays _ _ . _ F if not connected, short or out of range.
DA TEMP
_ _ . _ °F
(or _ _ . _ °C)
–40°F to 150°F
(–40°C to 66°C)
DISCHARGE AIR TEMPERATURE, after Heating section
Displays when Discharge Air Sylk Bus sensor is connected and
displays measured discharge temperature.
Displays _ _ . _F if sensor sends invalid value, if not connected,
short or out of range.
OA TEMP
_ _ . _ °F
(or _ _ . _ °C)
–40°F to 140°F
(–40°C to 60°C)
OUTSIDE AIR TEMP
Displays measured value of outdoor air temperature.
Displays _ _ . _F if sensor sends invalid value, short or out of
range.
OA HUM _ _ % 0 to 100%
OUTSIDE AIR RELATIVE HUMIDITY
Displays measured value of outdoor humidity from OA Sylk Bus
sensor.
Displays _ _% if not connected short, or out of range.
RA TEMP
_ _ . _ °F
(or _ _ . _ °C)
0°F to 140°F
(–18°C to 60°C)
RETURN AIR TEMPERATURE
Displays measured value of return air temperature from RAT
Sylk Bus sensor.
Displays _ _ . _ F if sensor sends invalid value, if not connected,
short or out of range
RA HUM _ _ % 0 to 100%
RETURN AIR RELATIVE HUMIDITY
Displays measured value of return air humidity from RA Sylk Bus
sensor.
Displays _ _% if sensor sends invalid value, if not connected,
short or out of range
IN CO2 _ _ _ ppm 0 to 2000 ppm
SPACE/RETURN AIR CO
2
Displays value of measured CO
2
from CO
2
sensor. Invalid if not
connected, short or out of range. May be adjusted in Advanced
menu by Zero offset and Span.
DCV STATUS N/A ON/OFF
DEMAND CONTROLLED VENTILATION STATUS
Displays ON if above set point and OFF if below set point, and
ONLY if a CO
2
sensor is connected.
DAMPER OUT 2.0v 2.0 to 10.0v Displays voltage output to the damper actuator.***