Carrier 50FCQ 04-07 Series Service And Maintenance Instructions page 50

MENU PARAMETER
EXH1 SET
SETPOINTS
(cont)
EXH2 SET
INSTALL
UNITS DEG
EQUIPMENT
AUX2 IN
FAN SPEED
SYSTEM
SETUP
i
FAN CFM
AUX1 OUT
OCC
FACTORY DEFAULT
MA LO SET
FREEZE POS
CO2 ZERO
CO2 SPAN
ADVANCED
SETUP
STG3 DLY
SD DMPR POS
DA LO ALM
Table 17 — W7220 Menu Structure
PARAMETER PARAMETER
DEFAULT RANGE AND
VALUE INCREMENT
0 to 100%;
50%
increment by 1
0 to 100%;
75%
increment by 1
01/01/10 N/A
°F °F or °C
CONV
CONV or
HP
Shutdown (SD)
Heat (W1)
W
HP(O)
HP(B)
2 speed 1 speed/2 speed
100 to 15000 cfm;
5000 cfm
increment by 100
NONE
ERV
NONE
EXH2
SYS
INPUT INPUT or ALWAYS
NO NO or YES
35°F to 65°F
45°F (7°C) (2°C to 18°C);
Increment by 1°F
CLO CLO or MIN
0 to 500 ppm;
0 ppm
Increment by 10
1000 to 3000 ppm;
2000 ppm
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
50
a (cont)
EXPANDED PARAMETER NAME
b
EXHAUST FAN STAGE 1 SETPOINT
Set point for OA damper position when exhaust fan 1 is powered
by the economizer.
With 2-speed fan units, Exh1 L (low speed fan) and Exh1 H (high
speed fan) settings are required. Default for Exh1 L is 65% and
Exh1 H is 50%.
EXHAUST FAN STAGE 2 SETPOINT
Set point for OA damper position when exhaust fan 2 is powered
by the economizer. Only used when AUX1 O is set to EHX2.
With 2-speed fan units, Exh2 L (low speed fan) and Exh2 H (high
speed fan) settings are required. Default for Exh2 L is 80% and
Exh2 H is 75%.
Display order = MM/DD/YY
Setting order = DD, MM, then YY.
Sets economizer controller in degrees Fahrenheit or Celsius.
CONV = conventional;
HP O/B = Enable Heat Pump mode. Use AUX2 I for Heat Pump
input from thermostat or controller.
In CONV mode:
SD = Enables configuration of shutdown (default);
W = Informs controller that system is in heating mode.
NOTE: If using 2-speed fan mode, you must program CONV
mode for W. Shutdown is not available in 2-speed fan mode.
In HP O/B mode:
HP(O) = energize heat pump on Cool (default);
HP(B) = energize heat pump on heat.
Sets the economizer controller for operation of 1-speed or
2-speed supply fan. The controller does not control the fan, but
positions the OA and RA dampers to heating or cooling mode.
NOTE: 2-speed fan option also needs Heat (W1) programmed in
AUX 2 In.
UNIT DESIGN AIRFLOW (cfm)
Enter only if using DCVCAL ENA = AUTO.
This is the capacity of the RTU. The value is found on the
nameplate label for the specific unit.
Select OUTPUT for AUX1 O relay:
• NONE = not configured (output is not used)
• ERV = Energy Recovery Ventilator
• EXH2 = second damper position 24 vac out for second exhaust
fan
• SYS = use output as an alarm signal
OCCUPIED MODE BY EXTERNAL SIGNAL
When using a setback thermostat with occupancy out (24 vac),
the 24 vac is input "INPUT" to the OCC terminal. If no occupancy
output from the thermostat, then change program to "ALWAYS"
OR add a jumper from terminal R to OCC terminal.
Resets all set points to factory defaults when set to YES. LCD
will briefly flash YES and change to NO but all parameters will
change to the factory default values.
SUPPLY AIR TEMPERATURE LOW LIMIT
Temperature to activate Freeze Protection (close damper or
modulate to MIN POS if temp falls below set 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
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 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.
NOTES
h
sensor start level.
2
sensor; e.g.: 500-1500 sensor
2
span.
2