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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.
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.
MENU
PARAMETER
ECON AVAIL
ECONOMIZING
OCCUPIED
HEAT PUMP
COOL Y1—IN
COOL Y1—OUT
COOL Y2—IN
COOL Y2—OUT
MA TEMP
STATUS
DA TEMP
OA TEMP
OA HUM
RA TEMP
RA HUM
IN CO2
DCV STATUS
DAMPER OUT
Table 9 — W7220 Menu Structure*
PARAMETER
PARAMETER
DEFAULT
RANGE AND
VALUE
INCREMENT
NO
YES/NO
NO
YES/NO
NO
YES/NO
COOL
N/A**
HEAT
OFF
ON/OFF
OFF
ON/OFF
OFF
ON/OFF
OFF
ON/OFF
_ _ . _ °F
–40°F to 150°F
(or _ _ . _ °C)
(–40°C to 66°C)
_ _ . _ °F
–40°F to 150°F
(or _ _ . _ °C)
(–40°C to 66°C)
_ _ . _ °F
–40°F to 140°F
(or _ _ . _ °C)
(–40°C to 60°C)
_ _ %
0 to 100%
_ _ . _ °F
0°F to 140°F
(or _ _ . _ °C)
(–18°C to 60°C)
_ _ %
0 to 100%
_ _ _ ppm
0 to 2000 ppm
N/A
ON/OFF
2.0v
2.0 to 10.0v
35
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 dis-
plays a screen saver, which cycles through the Status items. Each
Status items displays in turn and cycles to the next item after
5 seconds.
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 first 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 or 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 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.
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 Sylk Bus
sensor.
Displays _ _% if not connected short, or out of range.
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
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
SPACE/RETURN AIR CO
Displays value of measured CO
connected, short or out of range. May be adjusted in Advanced
menu by Zero offset and Span.
DEMAND CONTROLLED VENTILATION STATUS
Displays ON if above set point and OFF if below set point, and
ONLY if a CO
sensor is connected.
2
Displays voltage output to the damper actuator.***
Notes
2
from CO
sensor. Invalid if not
2
2
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