Carrier 48FC 08-16 Series Service And Maintenance Instructions page 61

IMPORTANT: Table 19 illustrates the complete hierarchy.
Your menu parameters may be different depending on
your configuration.
For example, if you do not have a DCV (CO
none of the DCV parameters appear and only MIN POS will
display. If you have a CO
MAX will appear AND if you have 2 speed fan DCV MIN
(high and low speed) and DCV MAX (high and low speed
will appear).
NOTE: Some parameters in the menus use the letters MA or
MAT, indicating a mixed air temperature sensor location before
the cooling coil. This unit application has the control sensor locat-
ed after the cooling coil, in the fan section, where it is designated
as (Cooling) Supply Air Temperature or SAT sensor.
MENU PARAMETER
ECONO AVAIL
ECONOMIZING
OCCUPIED c
HEAT PUMP
COOL Y1—IN
COOL Y1—OUT
COOL Y2—IN
STATUS COOL Y2—OUT
MA TEMP e
DA TEMP
OA TEMP
OA HUM
RA TEMP
RA HUM
IN CO2
) sensor, then
2
sensor, the DCV MIN and DCV
2
Table 19 — W7220 Menu Structure
PARAMETER
DEFAULT
VALUE
NO YES/NO
NO YES/NO
NO YES/NO
COOL
N/A d
HEAT
OFF ON/OFF
OFF ON/OFF
OFF ON/OFF
OFF ON/OFF
0°F to 140°F
_ _ . _ F
(–17°C to 60°C)
0°F to 140°F
_ _ . _ F
(–17°C to 60°C)
–40°F to 140°F
_ _ . _ F
(–40°C to 60°C)
_ _ % 0 to 100%
0°F to 140°F
_ _ . _ F
(–17°C to 60°C)
_ _ % 0 to 100%
_ _ _ ppm 0 to 2000 ppm
Setup and Configuration
Before being placed into service, the W7220 economizer module
must be setup and configured for the installed system.
IMPORTANT: During setup, the economizer module is live
at all times.
The setup process uses a hierarchical menu structure that is easy to
use. Press the ▲ and ▼ arrow buttons to move forward and back-
ward 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.
PARAMETER
RANGE AND
INCREMENT b
FIRST STAGE COOLING DEMAND (Y1–IN)
YES = economizing available; the system can use outside air for free
cooling when required
FIRST STAGE COOLING RELAY OUTPUT
YES = outside air being used for 1 stage cooling
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 MODE
Displays COOL or HEAT when system is set to heat pump
(Non-conventional)
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
FIRST STAGE COOLING RELAY OUTPUT
Cool stage 1 Relay Output to stage 1 mechanical cooling
(Y1–OUT terminal)
SECOND STAGE COOLING DEMAND (Y2–IN)
Y2–I signal from space thermostat our unitary controller for second
stage cooling.
ON = 24 vac on terminal Y2–I
OFF = 0 vac on terminal Y2–I
SECOND STAGE COOLING RELAY OUTPUT
Cool Stage 2 Relay Output to mechanical cooling
(Y2–OUT terminal).
SUPPLY AIR TEMPERATURE, Cooling Mode
Displays value of measured mixed air from MAT sensor.
Displays _ _ . _ F if not connected, short or out-of-range.
DISCHARGE AIR TEMPERATURE, after Heating section
Displays when Discharge Air sensor is connected and displays
measured discharge temperature.
Displays _ _ . _F if sensor sends invalid value, if not connected, short
or out-of-range.
OUTSIDE AIR TEMP
Displays measured value of outdoor air temperature.
Displays _ _ . _F if sensor sends invalid value, short or out-of-range.
OUTSIDE AIR RELATIVE HUMIDITY
Displays measured value of outdoor humidity from OA sensor.
Displays _ _% if not connected short, or out-of-range.
RETURN AIR TEMPERATURE
Displays measured value of return air temperature from RAT sensor.
Displays _ _ . _ F if sensor sends invalid value, if not connected,
short or out-of-range
RETURN AIR RELATIVE HUMIDITY
Displays measured value of return air humidity from RA sensor.
Displays _ _% if sensor sends invalid value, if not connected, short
or out-of-range.
SPACE/RETURN AIR CO
Displays value of measured CO
connected, short or out-of-range.
61
a
NOTES
2
from CO sensor. Invalid if not
2 2