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CHECKOUT
DAMPER VMIN .HS
DAMPER VMAX .HS
DAMPER OPEN
DAMPER CLOSE
CONNECT Y1 ---O
CONNECT Y2 ---O
CONNECT AUX1O
ALARMS(_)
MA T SENS ERR
CO2 SENS ERR
OA T SENS ERR
OA SYLK SENS ERR
DA T SENS ERR
SYS ALARM
ACT UNDER V
ACT OVER V
ACT STALLED
a
Table 2 illustrates the complete hierarchy. your menu parameters may be different depending on your configuration.
For example if you do not have a DCV (CO
b
When values are displayed, pressing and holding the Y or B button causes the display to automatically increment.
c
n/a = not applicable
d
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.
Menu Notes
1
STATUS ---> OCCUPIED
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.
STATUS -> MA TEMP , SETPOINTS -> MAT SET – The W7220 menu parameters and labels include designations MA , MAT and Mixed Air
2
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.
SETPOINTS -> DRYBLB SET – This point is not displayed if a Return Air (differential) temperature sensor or an Outdoor Air enthalpy
3
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
Downloaded from
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Table 2 - - Menu Structure
Parameter
Parameter
Default
Value
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
) sensor, then none of the DCV parameters appear.
2
– The factory-standard Occupancy signal originates with a thermostat or other controller call for indoor fan operation
search engine
a
(cont)
Parameter
b
Range and Increment
Positions OA damper to VMIN High Speed position
Positions OA damper to VMAX High Speed position
Positions OA 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:
S NONE --- not action taken
S ERV --- 24 Vac out. Turns on or signals an ERV that the
conditions are not good for economizing but are good for
ERV operation.
S SYS --- 24 Vac out. Issues a system alarm
Alarms display only when they are active. The menu title "ALARMS(_)"
includes the number of active alarms in parenthesis ( ).
SUPPLY AIR TEMPERATURE SENSOR ERROR
CO2 SENSOR ERROR
OUTSIDE AIR TEMPERATURE SENSOR ERROR
OAT sensor connected at input terminals OAT
OUTSIDE AIR TEMPERATURE SENSOR ERROR
OAT sensor connected on S--- bus
DISCHARGE AIR TEMPERATURE SENSOR ERROR
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 at actuator is below expected range
ACTUATOR VOLTAGE HIGH
Voltage received at actuator is above expected range
ACTUATOR STALLED
Actuator stopped before reaching commanded position
8
EXPANDED PARAMETER NAME
Notes
d
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