Carrier 48GC 04-06 Series Service And Maintenance Instructions page 54

MENU PARAMETER
STG3 DLY
SD DMPR POS
DA LO ALM
DA HI ALM
DCVCAL ENA
ADVANCED
SETUP
MAT T CAL
(CONT)
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
MA T SENS ERR
ALARMS CO2 SENS ERR
OA SYLK T ERR
OA SYLK H ERR
RA SYLK T ERR
RA SYLK H ERR
Table 20 — W7220 Menu Structure
PARAMETER PARAMETER
DEFAULT RANGE AND
VALUE INCREMENT
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
45°F (7°C) 18°C) Incremented
by 5 deg.
70 to 180°F; (21 to
80°F (27°C) 82°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 in
5 minutes 1 minute
increments
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
54
a (cont)
b
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 3 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.
CO SENSOR ERROR
2
CO sensor has failed, gone out of range or become disconnected
2
— check wiring then replace sensor if the alarm continues.
OUTSIDE AIR S-BUS SENSOR ERROR
Outdoor air enthalpy sensor has failed or become disconnected —
check wiring then replace sensor if the alarm continues.
RETURN AIR S-BUS SENSOR ERROR
Return air enthalpy sensor has failed or become disconnected —
check wiring then replace sensor if the alarm continues.
NOTES
f