Bryant Preferred Series Service And Maintenance Instructions page 60

MENU PARAMETER
FREEZE POS
CO2 ZERO
CO2 SPAN
STG3 DLY
SD DMPR POS
DA LO ALM
DA HI ALM
ADVANCED
SETUP (cont)
DCVCAL ENA
MAT T CAL
OAS T CAL
OA H CAL
RA T CAL
RA H CAL
DA T CAL
2SP FAN DELAY
DAMPER MINIMUM
POSITION
DAMPER OPEN
DAMPER CLOSE
CONNECT Y1–O
CHECKOUT***
CONNECT Y2–O
CONNECT AUX1–O
CONNECT EXH1
Alarms display only when they are active. The menu title "ALARMS(#)" includes the number of active alarms in parenthesis ( ).
When using SYLK bus sensors, "SYLK" will appear on the screen, and when using 20k OA temperature sensors, "SENS T" will
ALARMS
MA T SENS ERR
Table 27 — W7220 Menu Structure* (cont)
PARAMETER PARAMETER
DEFAULT RANGE AND
VALUE INCREMENT
CLO CLO or MIN
0 to 500 ppm;
0ppm
Increment by 10
1000 to 3000 ppm;
2000ppm
Increment by 50
0 min, 5 min,
15 min, then 15 min
2.0h
intervals. Up to
4 hrs or OFF
CLO CLO or OPN
NONE
35°F to 65°F
45°F (7°C)
(2°C to 18°C);
Increment by 5°F
NONE
70°F to 180°F
80°F (27°C)
(21°C to 82°C);
Increment by 5°F
MAN (manual)
MAN
AUTO
0.0°F ± 2.5°F
0.0°F ± 2.5°F
0% RH ±10% RH
0.0°F ± 2.5°F
0% RH ±10% RH
0.0°F ± 2.5°F
0 to 20 minutes in 1
5 Minutes
minute increments
N/A N/A
N/A N/A
N/A N/A
N/A N/A
N/A N/A
N/A N/A
N/A N/A
appear on the screen
N/A N/A
60
EXPANDED PARAMETER NAME
†
FREEZE PROTECTION DAMPER POSITION
Damper position when freeze protection is active (closed or MIN
POS).
CO ppm level to match CO
2
CO ppm span to match CO
2
output would be 500 CO zero and 1000 CO
2
COOLING STAGE 3 DELAY
Delay after stage 2 cool has been active. Turns on second stage
of cooling when economizer is first stage call and mechanical
cooling is second stage call. Allows three stages of cooling, 1
economizer and 2 mechanical.
OFF = no Stage 3 cooling
Indicates shutdown signal from space thermostat or unitary
controller. When controller receives 24 vac input on the SD
terminal in conventional mode, the OA damper will open if
programmed for OPN and OA damper will close if programmed
for CLO. All other controls, e.g., fans, etc. will shut off.
Used for alarm for when the DA air temperature is too low. Set
lower range of alarm, below this temperature the alarm will show
on the display.
Used for alarm for when the DA air temperature is too high. Sets
upper range of alarm; above this temperature, the alarm will
show on the display.
Turns on the DCV automatic control of the dampers. Resets
ventilation based on the RA, OA, and MA sensor conditions.
Requires all (RA, OA, MA, CO
This operation is not operable with a 2-speed fan unit.
SUPPLY AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration
temperature sensor.
OUTSIDE AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration
temperature sensor.
OUTSIDE AIR HUMIDITY CALIBRATION
Allows for operator to adjust for an out of calibration humidity
sensor.
RETURN AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration
temperature sensor.
RETURN AIR HUMIDITY CALIBRATION
Allows for operator to adjust for an out of calibration humidity
sensor.
DISCHARGE AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration
temperature sensor.
TIME DELAY ON SECOND STAGE ECONOMIZING
When in economizing mode, this is the delay for the high speed
fan to try to satisfy the call for second stage cooling before the
first stage mechanical cooling is enabled.
The checkout for the damper minimum position is based on the
system. See Table 28.
Position damper to the full open position.
Exhaust fan contacts enable during the DAMPER OPEN test.
Make sure to pause in the mode to allow exhaust contacts to
energize due to the delay in the system.
Positions damper to the fully closed position
Closes the Y1-O relay (Y1-O)
Closes the Y2-O relay (Y2-O)
Energizes the AUX output. If Aux setting is:
• NONE — no action taken
• ERV — 24 vac out. Turns on or signals an ERV that the
conditions are not good for economizing but are for ERV
operation. ††
• SYS — 24 vac out. Issues a system alarm
Closes the power exhaust fan 1 relay (EXH1)
SUPPLY AIR TEMPERATURE SENSOR ERROR
Mixed air sensor has failed or become disconnected - check
wiring, then replace sensor if the alarm continues.
Notes
sensor start level.
2
sensor; e.g.: 500-1500 sensor
2
span.
2
) sensors.
2