Carrier 50FC 08-16 Series Service And Maintenance Instructions page 50

Menu Structure
Table 12 illustrates the complete hierarchy of menus and parame-
ters for the EconoMi$er X system.
®
The Menus in display order are:
• STATUS
• SETPOINTS
• SYSTEM SETUP
• ADVANCED SETUP
• CHECKOUT
• ALARMS
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
HEAT PUMP
COOL Y1—IN
COOL Y1—OUT
COOL Y2—IN
STATUS
COOL Y2—OUT
MA TEMP
DA TEMP
OA TEMP
OA HUM
RA TEMP
RA HUM
Table 12 — W7220 Menu Structure
PARAMETER PARAMETER
DEFAULT RANGE AND
VALUE INCREMENT f
NO YES/NO
NO YES/NO
NO YES/NO
COOL
N/A g
HEAT
OFF ON/OFF
OFF ON/OFF
OFF ON/OFF
OFF ON/OFF
_ _ . _ F 0 to 140°F
_ _ . _ F 0 to 140°F
_ _ . _ F –40 to 140°F
_ _ % 0 to 100%
_ _ . _ F 0 to 140°F
_ _ % 0 to 100%
Setup and Configuration
Before being placed into service, the W7220 Economizer module
must be set up 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.
a,b,c,d,e
EXPANDED PARAMETER NAME
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
50
NOTES