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MENU
PARAMETER
VENTMIN
SETPOINTS
(cont)
ERV OAT SP
EXH1 SET
EXH2 SET
INSTALL
UNITS DEG
EQUIPMENT
AUX2 IN
FAN SPEED
SYSTEM
SETUP
FAN CFM
AUX1 OUT
OCC
FACTORY DEFAULT
MA LO SET
FREEZE POS
CO2 ZERO
CO2 SPAN
ADVANCED
SETUP
STG3 DLY
SD DMPR POS
Table 9 — W7220 Menu Structure* (cont)
PARAMETER
PARAMETER
DEFAULT
RANGE AND
VALUE
INCREMENT
2 to 10 vdc or 100
to 9990 cfm
increment by 10
2.25 V
100 to 9990 cfm;
increment by 10
2 to 10 vdc
0°F to 50°F
††
32°F (0°C)
(–18°C to 10°C);
increment by 1°F
0 to 100%;
50%
increment by 1
0 to 100%;
75%
increment by 1
01/01/10
°F
CONV
Shutdown (SD)
Heat (W1)
W
2 speed
1 speed/2 speed
100 to 15000 cfm;
5000 cfm
increment by 100
NONE
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;
0ppm
Increment by 10
1000 to 3000 ppm;
2000ppm
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
EXPANDED PARAMETER NAME
†
DCV MINIMUM DAMPER POSITION
Displays only if a CO
(ventilation min cfm) set point. This is the ventilation for less than
maximum occupancy of the space.
If OA, MA, RA, and CO
ENABLE is set to AUTO mode, the OA dampers are controlled
by CFM and displays from 100 to 9990 CFM.
With 2-speed fan units VENTMIN L (low speed fan) and
VENTMIN H (high speed fan) settings are required. Default for
VENTMIN L is 2.5V and VENTMIN H is 2.25V
ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR
TEMPERATURE SETPOINT
Only when AUX1 O = ERV
EXHAUST FAN STAGE 1 SETPOINT
Set point for OA damper position when exhaust fan 1 is powered
by the economizer.
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.
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:
SD = Enables configuration of shutdown (default);
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
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)
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
• 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),
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
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 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.
37
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
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