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MENU
PARAMETER
DAMPER VMIN .HS
DAMPER VMAX .HS
DAMPER OPEN
DAMPER CLOSE
CONNECT Y1–O
CHECKOUT
CONNECT Y2–O
CONNECT AUX1O
CONNECT EXH1
Alarms display only when they are active. The menu title "ALARMS(#)" includes the number of active alarms in parenthesis ( ).
MA T SENS ERR
CO2 SENS ERR
OA T SENS ERR
OA SYLK SENS ERR
ALARMS
RA SYLK T ERR
RA SYLK H ERR
DA T SENS ERR
SYS ALARM
ACT UNDER V
ACT OVER V
ACT STALLED
LEGEND
ACT — ACTUATOR
CLO — COMPRESSOR LOCKOUT
DA
— DISCHARGE AIR
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 7 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 7 — 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
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
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
51
†
Positions OA damper to VMIN High Speed position.
Positions OA damper to VMAX High Speed position.
Position damper to the full open position.
Positions damper to the fully closed position
Closes the Y1-O relay (Y1-O)
Closes the Y2-O relay (Y2-O)
Energizes the AUX1O output. If Aux setting is:
• NONE — not action taken
• ERV — 24 Vac out. Turns on or signals an ERV that the conditions are
not good for economizing but are for ERV operation.
• SYS — 24 Vac out. Issues a system alarm.
Closes the power exhaust fan 2 relay (EXH1)
SUPPLY AIR TEMPERATURE SENSOR ERROR
Mixed air sensor has failed or become disconnected - check wiring then
replace sensor if the alarm continues.
CO
SENSOR ERROR
2
CO
sensor has failed, gone out of range or become disconnected - check
2
wiring then replace sensor if the alarm continues.
OUTSIDE AIR TEMPERATURE SENSOR ERROR
OAT sensor connected at input terminals OAT. Outdoor air temperature
sensor has failed or become disconnected - check wiring then replace if
the alarm continues.
OUTSIDE AIR TEMPERATURE SENSOR ERROR
OAT sensor connected on S-bus.
RETURN AIR S-BUS SENSOR ERROR
Return air enthalpy sensor has failed or become disconnected - check
wiring then replace sensor if the alarm continues.
DISCHARGE AIR TEMPERATURE SENSOR ERROR
Discharge air temperature is out of the range set in the ADVANCED
SETUP Menu. Check the temperature of the discharge air.
When AUX is set to SYS and there is any alarm (e.g., failed sensors, etc.),
the AUX terminal has 24 Vac out.
ACTUATOR VOLTAGE LOW
Voltage received by actuator is below expected range.
ACTUATOR VOLTAGE HIGH
Voltage received by actuator is above expected range.
ACTUATOR STALLED
Actuator stopped before reaching commanded position.
NOTES:
1.
STATUS —> OCCUPIED — The factory-standard Occupancy sig-
nal originates with a thermostat or other controller call for indoor
operation at ISC terminal G. This signal passes through the Inte-
grated Staging Control 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 TYPE = 2SPEED
W7220 ECONOMIZER MODULE WIRING
Use Fig. 69 and Tables 8 and 9 to locate the wiring terminals for
the Economizer module. See Fig. 70 and 71 for sensor and con-
trols connections.
NOTES
††
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