51
Table 7 — W7220 Menu Structure* (cont)
LEGEND
* 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
2
) sensor, then none of the DCV parameters
appear.
† When values are displayed, pressing and holding the or 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 Heat-
ing 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 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. SE
TPOINTS —> 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.
MENU PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
†
NOTES
CHECKOUT
DAMPER VMIN .HS N/A N/A Positions OA damper to VMIN High Speed position.
DAMPER VMAX .HS N/A N/A Positions OA damper to VMAX High Speed position.
DAMPER OPEN N/A N/A Position damper to the full open position.
DAMPER CLOSE N/A N/A Positions damper to the fully closed positi
on
CONNECT Y1
–O N/A N/A Closes the Y1-O relay (Y1-O)
CONNECT Y2–O N/A N/A Closes the Y2-O relay (Y2-O)
CONNECT AUX1O N/A N/A 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.
CONNECT EXH1 N/A N/A Closes the power exhaust fan 2 relay (EXH1)
ALARMS
Alarms display only when they are active. The menu title “ALARMS(#)” includes the number of active alarms in parenthesis ( ).
MA T SENS ERR N/A N/A SUPPLY AIR TEMPERATURE SENSOR ERROR
Mixed air sensor has failed or become disconnected - check wiring then
replace sensor if the alarm continues.
CO2 SENS ERR N/A N/A CO
2
SENSOR ERROR
CO
2
sensor has failed, gone out of range or become disconnected - check
wiring then replace sensor if the alarm continues.
OA T SENS ERR N/A N/A 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.
OA SYLK SENS ERR N/A N/A OUTSIDE AIR TEMPERATURE SENSOR ERROR
OAT sensor connected on S-bus.
RA
SYLK T ERR N/A N/A RETURN AIR S-BUS SENSOR ERROR
Return air enthalpy sensor has failed or become disconnected - check
wiring then replace sensor if the alarm continues.
RA SYLK H ERR N/A N/A
DA T SENS ERR N
/A N/A 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.
SYS ALARM N/A N/A When AUX is set to SYS and there is any alarm (e.g., failed sensors, etc.),
the AUX 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 ACTUATO
R VOLTAGE HIGH
Voltage received by actuator is above expected range.
ACT STALLED N/A N/A ACTUATOR STALLED
Actuator stopped before reaching commanded position.
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
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