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IMPORTANT : The default setting on t he W7220 controller is for a “Fan Type” with 2 speeds, which is correct for 2 or 3
speed units.
IMPORTANT : Table 6 illustrates the complete hierarchy. Your me nu parameters may be be different depending on your
computer configuration.
Table 7 – Menu Structure
a
Menu Parameter
Parameter
Default
Value
Parameter range
and
Increment
b
Notes
Status
ECON AVAIL NO YES/NO
YES = economizing available; the system can use outside a ir for free cooling
when required
ECONOMIZING NO YES/NO YES = outside air being used for 1st stage cooling
OCCUPIED NO YES/NO
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
Displays COOL or HEAT when system is set to heat pump (Non - conventional)
COOL Y1- IN OFF ON/OFF
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 Cool stage 1 Relay Output to stage 1 mechanical cooling (Y1- OUT terminal)
COOL Y2- IN OFF ON/OFF
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
COOL Y2- OUT OFF ON/OFF Cool Stage 2 Relay Output to m echanical cooling (Y2- OUT terminal)
MA TEMP __._° F 0 to 140° F
Displays value of measured mixed air from MAT sensor. Displays _ _ . _ ° F if not
connected, short or out- of- range
DA TEMP __._° F 0 to 140° F
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
OA TEMP __._° F - 40 to 140° F
Displays measured value of outdoor air temperature. Displays _ _ _° F if sensor
sends invalid value, short or out- of- range
OA HUM __% 0 to 100%
Displays measured value of outdoor humidity from OA sensor
Displays _ _% i f not connected short, or out- of- ran ge
RA TEMP __._° F 0 to 140° F
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
RA HUM __% 0 to 100%
Displays measured value of return air humidity from RA sensor
Displays _ _% if sensor sends invalid value, if not connected, short or
out- of- range
IN CO2 ___ppm 0 to 2000 ppm
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
Displays ON if above setpoint and OFF if below setpoint, and ONLY if a CO2
sensor is connected
DAMPER OUT 2.0V 2.0 to 10.0V Displays voltage output to the damper actuator
EXH1 OUT OFF ON/OFF Output of EXH1 terminal: ON = relay closed, OFF = relay ope n
EXH2 OUT OFF ON/OFF Output of AUX terminal; displays only if AUX = EXH2
ERV OFF ON/OFF Output of AUX terminal; displays only if AUX = ERV
MECH COOL ON 0, 1, or 2 Displays stage of mechanical cooling that is active
40QQ
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