Carrier 50FC 08-16 Series Service And Maintenance Instructions page 53

MENU PARAMETER
MA LO SET
FREEZE POS
CO2 ZERO
CO2 SPAN
STG3 DLY
SD DMPR POS
DA LO ALM
ADVANCED
DA HI ALM
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
Table 12 — W7220 Menu Structure
PARAMETER PARAMETER
DEFAULT RANGE AND
VALUE INCREMENT
f
35 to 55°F;
45°F Incremented by
10
CLO CLO or MIN
0 to 500 ppm;
0ppm Increment by
10
1000 to 3000
2000ppm ppm; Increment
by 10
0 min, 5 min,
15 min, then
2.0h 15 min
intervals. Up to
4 hrs or OFF
CLO CLO or OPN
35 to 65°F;
(2 to 18°C)
45°F (7°C)
Incremented by
5 deg.
70 to 180°F;
(21 to 82°C)
80°F (27°C)
Incremented by
5 deg.
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
5 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
a,b,c,d,e
EXPANDED PARAMETER NAME
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 sensor start level.
2 2
CO ppm span to match CO sensor.
2 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.
53
NOTES
††