58
STATUS
(cont)
RA TEMP
_ _ . _ °F
(or _ _ . _ °C)
0°F to 140°F
(–18°C to 60°C)
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
RA HUM _ _ % 0 to 100%
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
IN CO2 _ _ _ ppm 0 to 2000 ppm
SPACE/RETURN AIR CO
2
Displays value of measured CO
2
from CO
2
sensor. Invalid if not
connected, short or out of range. May be adjusted in Advanced
menu by Zero offset and Span.
DCV STATUS N/A ON/OFF
DEMAND CONTROLLED VENTILATION STATUS
Displays ON if above set point and OFF if below set point, and
ONLY if a CO
2
sensor is connected.
DAMPER OUT 2.0v 2.0 to 10.0v Displays voltage output to the damper actuator.***
ACT POS N/A 0 to 100% Displays actual position of actuator
ACT COUNT N/A 1 to 65,535
Displays number of times actuator has cycled.
1 cycle equals 180 degrees of actuator movement in any
direction.
ACTUATOR N/A
OK/Alarm (on
Alarm menu)
Displays ERROR if voltage or torque is below actuator range.
EXH1 OUT OFF ON/OFF
EXHAUST STAGE 1 RELAY OUTPUT
Displays ON when damper position reaches programmed
percentage set point.
Output of EXH1 terminal:
ON = relay closed
OFF = relay open
EXH2 OUT OFF ON/OFF
EXHAUST STAGE 2 RELAY OUTPUT
Output of AUX1 O terminal
Displays ON when damper position reaches programmed
percentage set point.
ON = 24 vac output
OFF = No output
Displays only if AUX1 O = EXH2
ERV OFF ON/OFF
ENERGY RECOVERY VENTILATOR
Output of AUX1 O terminal; displays only if AUX1 O = ERV
ON = 24 vac output
OFF = No Output
MECH COOL ON
or
HEAT STAGES ON
0 0, 1, or 2
Displays stage of mechanical cooling that is active.
Displays the stage of heat pump heating that is active.
FAN SPEED N/A LOW or HIGH
SUPPLY FAN SPEED
Displays speed setting of fan on a 2-speed fan unit.
W (HEAT IN) N/A ON/OFF
HEAT DEMAND STATUS
Displays status of heat demand on a 2-speed fan unit.
SETPOINTS
MAT SET 53°F (12°C)
38°F to 70°F
(3°C to 21°C);
increment by 1°F
SUPPLY AIR SETPOINT
The economizer will modulate the OA damper to maintain the
mixed air temperature at the set point
LOW T LOCK 32°F (0°C)
–45°F to 80°F
(–43°C to 27°C);
increment by 1°F
COMPRESSOR LOW TEMPERATURE LOCKOUT
Set point determines outdoor temperature when the mechanical
cooling cannot be turned on. Commonly referred to as the
Compressor lockout. At or below the set point, the Y1-O and Y2-
O will not be energized on the controller.
DRYBLB SET 63°F (17°C)
48°F to 80°F
(9°C to 27°C);
increment by 1°F
OA DRY BULB TEMPERATURE CHANGEOVER SETPOINT
Dry bulb set point will only appear if using dry bulb changeover.
Set point 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.
ENTH CURVE ES3
ES1,ES2,ES3,ES4,
or ES5
ENTHALPY CHANGEOVER CURVE
ES curve will only appear if using enthalpy changeover.
Enthalpy boundary “curves” for economizing using single
enthalpy. See page 65 for description of enthalpy curves.
DCV SET 1100ppm
500 to 2000 ppm;
increment by 100
DEMAND CONTROLLED VENTILATION
Displays only if CO
2
sensor is connected. Set point for Demand
Controlled Ventilation of space. Above the set point, the OA
dampers will modulate open to bring in additional OA to maintain
a space ppm level below the set point.
MIN POS 2.8 V 2 to 10 vdc
VENTILATION MINIMUM POSITION
Displays ONLY if a CO
2
sensor is NOT connected.
With 2-speed fan units, MIN POS L (low speed fan) and MIN
POS H (high speed fan) settings are required. Default for MIN
POS L is 3.2V and MIN POS H is 2.8V.
Table 27 — W7220 Menu Structure* (cont)
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
†
EXPANDED PARAMETER NAME
Notes
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