Bryant Preferred Series Service And Maintenance Instructions page 58

MENU PARAMETER
RA TEMP
RA HUM
IN CO2
DCV STATUS
DAMPER OUT
ACT POS
ACT COUNT
ACTUATOR
STATUS
(cont)
EXH1 OUT
EXH2 OUT
ERV
MECH COOL ON
or
HEAT STAGES ON
FAN SPEED
W (HEAT IN)
MAT SET
LOW T LOCK
DRYBLB SET
SETPOINTS
ENTH CURVE
DCV SET
MIN POS
Table 27 — W7220 Menu Structure* (cont)
PARAMETER PARAMETER
DEFAULT RANGE AND
VALUE INCREMENT
_ _ . _ °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
N/A 0 to 100%
N/A 1 to 65,535
OK/Alarm (on
N/A
Alarm menu)
OFF ON/OFF
OFF ON/OFF
OFF ON/OFF
0 0, 1, or 2
N/A LOW or HIGH
N/A ON/OFF
38°F to 70°F
53°F (12°C) (3°C to 21°C);
increment by 1°F
–45°F to 80°F
32°F (0°C) (–43°C to 27°C);
increment by 1°F
48°F to 80°F
63°F (17°C) (9°C to 27°C);
increment by 1°F
ES1,ES2,ES3,ES4,
ES3
or ES5
500 to 2000 ppm;
1100ppm
increment by 100
2.8 V 2 to 10 vdc
58
EXPANDED PARAMETER NAME
†
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.***
Displays actual position of actuator
Displays number of times actuator has cycled.
1 cycle equals 180 degrees of actuator movement in any
direction.
Displays ERROR if voltage or torque is below actuator range.
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
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
ENERGY RECOVERY VENTILATOR
Output of AUX1 O terminal; displays only if AUX1 O = ERV
ON = 24 vac output
OFF = No Output
Displays stage of mechanical cooling that is active.
Displays the stage of heat pump heating that is active.
SUPPLY FAN SPEED
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.
SUPPLY AIR SETPOINT
The economizer will modulate the OA damper to maintain the
mixed air temperature at the set point
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.
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.
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.
DEMAND CONTROLLED VENTILATION
Displays only if CO sensor is connected. Set point for Demand
2
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.
VENTILATION MINIMUM POSITION
Displays ONLY if a CO sensor is NOT connected.
2
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.
Notes
2
from CO sensor. Invalid if not
2 2