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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 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
rameters appear.
†
When values are displayed, pressing and holding the
button 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.
Table 9 — Damper Minimum Position Settings and Readings on Checkout Menu
DEMAND CONTROLLED
VENTILATION
(CO
SENSOR)
2
NO
YES
Table 8 — Menu Structure* (cont)
PARAMETER
PARAMETER
DEFAULT
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
) sensor, then none of the DCV pa-
2
or
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
RANGE AND
†
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 complet-
ing 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
signal 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 Occupancy 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 en-
thalpy 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. For dry bulb operation with a 1 speed in-
door fan, with or without DCV, see Tables 10 and 11. For en-
thalpy operation with a 1 speed indoor fan, with or without
DCV, see Tables 12 and 13.
FAN SPEED
1
1
2
2
1
1
2
2
2
2
34
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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