37
Table 8 — Menu Structure* (cont)
LEGEND
* Table 8 illustrates the complete hierarchy. Your menu parameters
may be different depending on your configuration. For example if
you do not have a DCV (CO
2
) sensor, then none of the DCV param-
eters appear.
† When values are displayed, pressing and holding the or but-
ton 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 Heating mode, the ERV terminal will be energized when the OA
is below the ERV OAT setpoint in the setpoint menu.
NOTES:
1. STATUS —> OCCUPIED — The factory-standard Occupancy
signal originates with a thermostat or other controller call for
indoor fan operation at UCB terminal G. This signal passes
through the Unit Control Board’s OCCUPANCY jumper 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 rooftop units, the economizer control sensor is located
downstream of the evaporator/indoor coil in the supply fan sec-
tion 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
enthalpy 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 9.
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
†
NOTES
ALARMS
(CONT)
SHUTDOWN ACTIVE N/A N/A AUX2 IN is programmed for SHUTDOWN and 24 V has been applied to
AUX2 IN terminal.
DMP CAL RUNNING N/A N/A DAMPER CALIBRATION ROUTINE RUNNING
If DCV Auto enable has been programmed, when the W7220 is complet-
ing a calibration on the dampers, this alarm will display. Wait until the cali-
bration 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.
DA SENS ALM N/A N/A 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.
SYS ALARM N/A N/A When AUX1-O is set to SYS and there is any alarm (e.g., failed sensors,
etc.), the AUX1-O terminal has 24 Vac out.
ACT UNDER V N/A N/A ACTUATOR VOLTAGE LOW
Voltage received by actuator is below expected range.
ACT OVER V N/A N/A ACTUATOR VOLTAGE HIGH
Voltage received by actuator is above expected range.
ACT STALLED N/A N/A ACTUATOR STALLED
Actuator stopped before achieving commanded position.
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 9 — Damper Minimum Position Settings and Readings on Checkout Menu
DEMAND CONTROLLED
VENTILATION
(CO
2
SENSOR)
SETPOINTS FAN SPEED CHECKOUT
NO
MIN POS 1 VMAX–HS
N/A 1 N/A
MIN POS H 2 VMAX–HS
MIN POS L 2 VMAX–LS
YES
VENT MIN 1 VMAX–HS
VENT MAX 1 VMAX–HS
VENT MIN H 2 VMAX–HS
VENT MAX H 2 VMAX–LS
VENT MIN L 2 N/A
VENT MAX L 2 N/A
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