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MENU
PARAMETER
MA LO SET
FREEZE POS
CO2 ZERO
CO2 SPAN
STG3 DLY
SD DMPR POS
DA LO ALM
DA HI ALM
ADVANCED
SETUP
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
CHECKOUT
CONNECT Y1–O
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 appear on the
screen
ALARMS
MA T SENS ERR
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Table 9 — W7220 Menu Structure* (cont)
PARAMETER
PARAMETER
DEFAULT
RANGE AND
VALUE
INCREMENT
45°F
35 to 55°F;
Incremented by 10
CLO
CLO or MIN
0ppm
0 to 500 ppm;
Increment by 10
2000ppm
1000 to 3000 ppm;
Increment by 10
2.0h
0 min, 5 min,
15 min, then
15 min intervals.
Up to 4 hrs or OFF
CLO
CLO or OPN
45°F (7°C)
35 to 65°F; (2 to
18°C) Incremented
by 5 deg.
80°F (27°C)
70 to 180°F; (21 to
82°C) Incremented
by 5 deg.
MAN
MAN (manual)
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
5 Minutes
0 to 20 minutes in 1
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
N/A
N/A
Specifications subject to change without notice.
†
SUPPLY AIR TEMPERATURE LOW LIMIT
Temperature to achieve Freeze Protection (close damper and alarm if
temperature falls below setup value).
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
COOLING STAGE 3 DELAY
Delay after stage 2 cool has been active. Turns on second stage of
cooling when economizer is first stage and mechanical cooling is
second stage. 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. Set 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 3 RA, OA, and MA sensors.
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.
Position damper to the full open position.
Exhaust fan contacts enable during the DAMPER OPEN test. Make
sure you 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 — not 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 2 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.
2
††
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