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MENU
PARAMETER
SHUTDOWN ACTIVE
DMP CAL RUNNING
DA SENS ALM
ALARMS
(CONT)
SYS ALARM
ACT UNDER V
ACT OVER V
ACT STALLED
LEGEND
CLO — Compressor Lockout
ERV — Energy Recovery Ventilator
LCD — Liquid Crystal Display
MA
— Mixed Air
MAT — Mixed Air Temperature
N/A
— Not Applicable
OA
— Outdoor Air
OAT — Outdoor Air Temperature
OCC — Occupied
RA
— Return Air
RAT — Return Air Temperature
RTU — Rooftop Unit
SYS — System
*
Table 10 illustrates the complete hierarchy. Your menu parameters
may be different depending on your configuration. For example if you
do not have a DCV (CO
) sensor, then none of the DCV parameters
2
appear.
† When values are displayed, pressing and holding the
causes the display to automatically increment.
** N/A = Not Applicable.
†† ERV Operation: When in cooling mode AND the conditions are NOT
OK for economizing - the ERV terminal will be energized. In the Heat-
ing mode, the ERV terminal will be energized when the OA is below
the ERV OAT setpoint in the setpoint menu.
Table 11 — Damper Minimum Position Settings and Readings on Checkout Menu
DEMAND CONTROLLED
VENTILATION
(CO
SENSOR)
2
NO
YES
Table 10 — Menu Structure* (cont)
PARAMETER
PARAMETER
DEFAULT
RANGE AND
VALUE
INCREMENT
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
or
button
SETPOINTS
MIN POS
N/A
MIN POS H
MIN POS L
VENT MIN
VENT MAX
VENT MIN H
VENT MAX H
VENT MIN L
VENT MAX L
39
†
AUX2 IN is programmed for SHUTDOWN and 24 V has been applied to AUX2
IN terminal.
DAMPER CALIBRATION ROUTINE RUNNING
If DCV Auto enable has been programmed, when the W7220 is completing a
calibration on the dampers, this alarm will display. Wait until the calibration is
completed and the alarm will go away. Must have OA, MA and RA sensors for
DCV calibration; set up in the Advanced setup menu.
DISCHARGE AIR TEMPERATURE SENSOR ALARM
Discharge air temperature is out of the range set in the ADVANCED SETUP
Menu. Check the temperature of the discharge air.
When AUX1-0 is set to SYS and there is any alarm (e.g., failed sensors, etc.),
the AUX1-0 terminal has 24 Vac out.
ACTUATOR VOLTAGE LOW
Voltage received by actuator is above expected range.
ACTUATOR VOLTAGE HIGH
Voltage received by actuator is below expected range.
ACTUATOR STALLED
Actuator stopped before achieving commanded position.
NOTES:
1.
STATUS —> OCCUPIED — The factory-standard Occupancy sig-
nal originates with a thermostat or other controller call for indoor
fan operation at CTB terminal G. This signal passes through the
Central Terminal Board's OCCUPIED jumper JMP1 to the
ECONO connector and to the W7220's OCC input terminal. An
external timeclock or relay is required to implement an Occu-
pancy schedule on the economizer damper position.
2.
STATUS —> MA TEMP, SETPOINTS —> MAT SET — The W7220
menu parameters and labels include designations MA, MAT and
Mixed Air for the economizer cooling control sensor. On these roof-
top units, the economizer control sensor is located downstream of
the evaporator/indoor coil in the supply fan section where this sensor
is designated as Supply Air Temperature (SAT) sensor.
3.
SETPOINTS —> DRYBLB SET — This point is not displayed if a
Return Air (differential) temperature sensor or an Outdoor Air enthal-
py sensor is connected.
4.
SYSTEM SETUP parameters must be configured as noted for 2-
Speed unit operation:
EQUIPMENT = CONV
AUX2 I = W
FAN SPEED = 2SPEED
For damper minimum position settings and checkout menu
readings, see Table 11. For dry bulb operation with a 1 speed
indoor fan, with or without DCV, see Tables 12 and 13. For en-
thalpy operation with a 1 speed indoor fan, with or without
DCV, see Tables 14 and 15.
FAN SPEED
1
1
2
2
1
1
2
2
2
2
NOTES
CHECKOUT
VMAX–HS
N/A
VMAX–HS
VMAX–LS
VMAX–HS
VMAX–HS
VMAX–HS
VMAX–LS
N/A
N/A
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