Bryant Preferred Series Installation Instructions Manual page 34

MENU PARAMETER
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 11 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 set point in the set point menu.
*** After 10 minutes without a command or mode change, the controller
will change to normal operation.
Table 12 — Damper Minimum Position Settings and Readings on Checkout Menu
FAN SPEED
1
Table 11 — W7220 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
or button
DEMAND CONTROLLED
VENTILATION
(CO SENSOR)
2
NO
YES
EXPANDED PARAMETER NAME
†
DAMPER CALIBRATION ROUTINE RUNNING
If DCV Auto enable has been programmed, this alarm will display
when the W7220 is completing a calibration on the dampers.
Wait until the calibration is completed and the alarm will go away.
Must have OA, MA and RA sensors for DCV calibration; set up is
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-O is set to SYS and there is any alarm (e.g., failed
sensors, etc.), the AUX1-O 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 OCCUPANCY jumper 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 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
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 12. For dry bulb operation with or without
DCV, see Tables 13 and 14. For enthalpy operation with or
without DCV, see Tables 15 and 16.
SETPOINTS
MIN POS
N/A
VENT MIN
VENT MAX
34
Notes
CHECKOUT
VMAX–HS
N/A
VMAX–HS
VMAX–HS