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MENU
PARAMETER
IN CO2
DCV STATUS
DAMPER OUT
ACT POS
ACT COUNT
ACTUATOR
STATUS
(CONT)
EXH1 OUT
EXH2 OUT
MECH COOL ON
or
HEAT STAGES ON
FAN SPEED
W (HEAT ON)
MAT SET
LOW T LOCK
DRYBLB SET
DRYBLB DIFF
ENTH CURVE
DCV SET
SETPOINTS
MIN POS
MIN POS L
MIN POS M
MIN POS H
VENTMAX L
VENTMAX M
VENTMAX H
Table 12 — W7220 Menu Structure
PARAMETER
PARAMETER
DEFAULT
RANGE AND
VALUE
INCREMENT
f
_ _ _ ppm
0 to 2000 ppm
N/A
ON/OFF
2.0v
2.0 to 10.0v
N/A
0 to 100%
N/A
1 to 65535
OK/Alarm (on
N/A
Alarm menu)
OFF
ON/OFF
OFF
ON/OFF
0
0, 1, or 2
LOW or HIGH SUPPLY FAN SPEED
N/A
N/A
ON/OFF
38 to 70°F;
53°F
increment by 1
–45 to 80°F
32°F
increment by 1
48 to 80°F
63°F
increment by 1
0 to 6°F
0°F
Increment by 2
ES1, ES2,
ES3
ES3, ES4, or
ES5
500 to 2000
1100ppm
ppm; increment
by 100
4.4 V
2 to 10 vdc
6.0 V
2 to 10 vdc
5.4 V
2 to 10 vdc
4.4 V
2 to 10 vdc
6.0V
2 to 10 vdc
5.4 V
2 to 10 vdc
4.4 V
2 to 10 vdc
a,b,c,d,e
EXPANDED PARAMETER NAME
SPACE/RETURN AIR CO
2
Displays value of measured CO
short or out-of-range
DEMAND CONTROLLED VENTILATION STATUS
Displays ON if above setpoint and OFF if below setpoint, and ONLY if a
CO
sensor is connected.
2
Displays voltage output to the damper actuator.
Displays actual position of outdoor air damper actuator
Displays number of times actuator has cycled.
1 cycles equals 180 deg. of actuator movement in any direction.
Displays ERROR if voltage or torque is below actuator range.
EXHAUST STAGE 1 RELAY OUTPUT
Output of EXH1 terminal:
ON = relay closed
OFF = relay open
EXHAUST STAGE 2 RELAY OUTPUT
Output of AUX terminal; displays only if AUX = EXH2
Displays stage of mechanical cooling that is active.
Displays the stage of heat pump heating that is active.
Displays speed setting of fan on a 2-speed fan unit.
HEAT DEMAND STATUS
Displays status of heat demand on a 2-speed fan unit.
MIXED AIR SETPOINT Setpoint determines where the economizer will
modulate the OA damper to maintain the mixed air temperature.
COMPRESSOR LOW TEMPERATURE LOCKOUT
Setpoint determines outdoor temperature when the mechanical cooling
cannot be turned on. Commonly referred to as the Compressor lockout.
OA DRY BULB TEMPERATURE CHANGEOVER SETPOINT
Setpoint determines where the economizer will assume outdoor air
temperature is good for free cooling; e.g.; at 63°F unit will economize at 62°F
and below and not economize at 64°F and above. There is a 2°F deadband.
DRYBULB SET is only displayed if the economizer has a single dry bulb
sensor.
Drybulb Differential will only show if using dual drybulb - i.e., when an
outdoor air temperature sensor C7250 is attached to OAT terminals and
C7400S sensor is wired to S-Bus and configured for RAT (return air). Free
cooling will be assumed whenever OA temp is at or below RAT minus this
drybulb setting.
ENTHALPY CHANGEOVER CURVE
(Requires enthalpy sensor option)
Enthalpy boundary "curves" for economizing using single enthalpy.
DEMAND CONTROLLED VENTILATION SETPOINT
Displays only if CO
sensor is connected. Setpoint for Demand Controlled
2
Ventilation of space. Above the setpoint, the OA dampers will modulate
open to bring in additional OA to maintain a space ppm level below the
setpoint.
VENTILATION MINIMUM POSITION. Only displayed if controller is set for
single speed unit under FAN TYPE, and if DCV is NOT used.
VENTILATION MINIMUM POSITION AT LOW SPEED. Only displays if unit
is set for 2 or 3 speed and CO
2
1 cool then set for HEATING ventilation. If using 3 speed with 1 heat and 2
cool then set for LOW SPEED COOLING ventilation.
VENTILATION MINIMUM POSITION AT MEDIUM SPEED. Only displays if
unit is set for 3 speed with 1 heat and 2 cool, and CO
HEATING ventilation.
VENTILATION MINIMUM POSITION AT HIGH SPEED. Only displays if unit
is set for 2 or 3 speed and CO
2
1 cool then set for COOLING ventilation. If using 3 speed with 1 heat and 2
cool then set for HIGH SPEED COOLING ventilation
DCV MAXIMUM DAMPER POSITION AT LOW SPEED. Only displays if
unit is set for 2 speed or 3 speed with 1 heat and 2 cool. IF using 2 speed
with 1 heat and 1 cool then set for HEATING ventilation. If using 3 speed
with 1 heat and 2 cool then set for LOW SPEED COOLING
DCV MAXIMUM DAMPER POSITION AT MEDIUM SPEED. Only displays
if unit is set for 3 speed with 1 heat and 2 cool. Set for HEATING ventilation.
DCV MAXIMUM DAMPER POSITION AT HIGH SPEED. Only displays if
unit is set for 2 speed or 3 speed with 1 heat and 2 cool. IF using 2 speed
with 1 heat and 1 cool then set for COOLING ventilation. If using 3 speed
with 1 heat and 2 cool then set for HIGH SPEED COOLING ventilation
50
NOTES
from CO
sensor. Invalid if not connected,
2
2
is not used. If using 2 speed with 1 heat and
is not used. Set for
2
is not used. IF using 2 speed with 1 heat and
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Troubleshooting
