Carrier WeatherMaster 48HC Series Installation Instructions Manual page 46

MENU
SETPOINTS
(cont)
SYSTEM
SETUP
FACTORY DEFAULT
ADVANCED
SETUP
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Table 13 — W7220 Menu Structure* (cont)
PARAMETER
PARAMETER DEFAULT
VALUE
VENTMIN 2.25 V
ERV OAT SP †† 32°F (0°C)
EXH1 SET 50%
EXH2 SET 75%
INSTALL 01/01/10
UNITS DEG °F
EQUIPMENT CONV
AUX2 IN W
FAN SPEED 2 speed
FAN CFM 5000 cfm
AUX1 OUT NONE
OCC INPUT
NO
MA LO SET 45°F (7°C)
FREEZE POS CLO
CO2 ZERO 0ppm
CO2 SPAN 2000ppm
STG3 DLY 2.0h
SD DMPR POS CLO
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PARAMETER
RANGE AND
INCREMENT †
DCV MINIMUM DAMPER POSITION
2 to 10 vdc or 100
Displays only if a CO
to 9990 cfm
(ventilation min cfm) set point. This is the ventilation for less than
increment by 10
maximum occupancy of the space.
If OA, MA, RA, and CO
100 to 9990 cfm;
ENABLE is set to AUTO mode, the OA dampers are controlled
increment by 10
by CFM and displays from 100 to 9990 CFM.
With 2-speed fan units VENTMIN L (low speed fan) and
2 to 10 vdc VENTMIN H (high speed fan) settings are required. Default for
VENTMIN L is 2.5V and VENTMIN H is 2.25V
0°F to 50°F
ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR
(–18°C to 10°C);
TEMPERATURE SETPOINT
increment by
Only when AUX1 O = ERV
1 degree
EXHAUST FAN STAGE 1 SETPOINT
0 to 100%;
Set point for OA damper position when exhaust fan 1 is powered
increment by 1
by the economizer.
EXHAUST FAN STAGE 2 SETPOINT
0 to 100%;
Set point for OA damper position when exhaust fan 2 is powered
increment by 1
by the economizer. Only used when AUX1 O is set to EHX2.
Display order = MM/DD/YY
N/A
Setting order = DD, MM, then YY.
°F or °C Sets economizer controller in degrees Fahrenheit or Celsius
CONV CONV = conventional;
or HP O/B = Enable Heat Pump mode. Use AUX2 I for Heat Pump
HP input from thermostat or controller.
In CONV mode:
Shutdown (SD) SD = Enables configuration of shutdown (default);
Heat (W1) W = Informs controller that system is in heating mode.
HP(O) In HP O/B mode:
HP(B) 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
1 speed/2 speed speed supply fan. The controller does not control the fan, but
positions the OA and RA dampers to heating or cooling mode.
UNIT DESIGN AIRFLOW (CFM)
100 to 15000 cfm; Enter only if using DCVCAL ENA = AUTO
increment by 100 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 • NONE = not configured (output is not used)
ERV • ERV = Energy Recovery Ventilator
EXH2 • EXH2 = second damper position 24 vac out for second exhaust
SYS fan
• SYS = use output as an alarm signal
OCCUPIED MODE BY EXTERNAL SIGNAL
When using a setback thermostat with occupancy out (24 vac),
INPUT or ALWAYS 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
NO or YES will briefly flash YES and change to NO but all parameters will
change to the factory default values.
35°F to 65°F
SUPPLY AIR TEMPERATURE LOW LIMIT
(2°C to 18°C);
Temperature to activate Freeze Protection (close damper or
Increment by
modulate to MIN POS if temp falls below set value).
1 degree
FREEZE PROTECTION DAMPER POSITION
CLO or MIN Damper position when freeze protection is active (closed or MIN
POS).
0 to 500 ppm;
CO ppm level to match CO
2
Increment by 10
1000 to 3000 ppm; CO ppm span to match CO
2
Increment by 50 output would be 500 CO
COOLING STAGE 3 DELAY
0 min, 5 min, 15 Delay after stage 2 cool has been active. Turns on second stage
min, then 15 min of cooling when economizer is first stage call and mechanical
intervals. Up to cooling is second stage call. Allows three stages of cooling, 1
4 hrs or OFF 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
CLO or OPN 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.
46
EXPANDED PARAMETER NAME
Notes
sensor is connected. Used for Va
2
sensors are connected and DCV CAL
2
††
sensor start level.
2
sensor; e.g.: 500-1500 sensor
2
zero and 1000 CO span.
2 2