8
Table 2 -- Menu Structure
a
(cont)
Menu Parameter
Parameter
Default
Value
Parameter
Range and Increment
b
EXPANDED PARAMETER NAME
Notes
CHECKOUT
DAMPER VMIN .HS n/a n/a P ositions OA damper to VMIN High Speed position
DAMPER VMAX .HS n/a n/a P ositions OA damper to VMAX High Speed position
DAMPER OPEN n/a n/a P os it ions OA damper to the full open posit ion.
DAMPER CLOSE n/a n/a P os it ions damper to the fully closed positi on
CONNECT Y1---O n/a n/a Cl ose s t h e Y1 --- O r e l a y ( Y1 --- O)
CONNECT Y2---O n/a n/a Cl ose s t h e Y2 --- O r e l a y ( Y2 --- O)
CONNECT AUX1O n/a n/a Ene rgi z e s the AUX1 O outp ut . If Aux se t ti ng 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.
d
S S Y S --- 2 4 V a c o u t . I s s u e s a s y s t e m a l a r m
ALARMS(_) Ala rm s disp lay only when they are active . The menu ti t le “ALA R MS(_)”
includes the number of acti ve alarms in parenthesis ( ).
MA T SENS ERR n/a n/a SUPPLY AI R TEMP ER ATURE SENSO R ERRO R
CO2 SENS E RR n/a n/a CO2 SENSOR ERROR
OA T SENS ERR n/a n/a OUTSIDE AIR TEMPERATURE SENSOR ERROR
OAT sensor connected at input terminals OA T
OA SYLK SE NS E RR n/a n/a OUTSIDE AIR TEMPERATURE SENSOR ERROR
OAT sensor connected on S --- bus
DA T SENS ERR n/a n/a DISCHARGE AIR TEMPERATURE SENSOR ERROR
SYS ALARM n/a n/a When A UX is set to SYS and there is any alarm (e.g., failed sensors,
etc.), the A UX terminal has 24 Vac out.
ACT UNDER V n/a n/a ACTUATOR VOLTAGE LOW
Voltag e received at actuator is below expected range
ACT OVER V n/a n/a ACTUATOR VOLTAGE HIGH
Voltag e received at actuator is above expected range
ACT STALLED n/a n/a ACTUATOR STALLED
Act uator stopped before reaching commanded posi t ion
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
2
) sensor, then none of the DCV parameters appear.
b
When values are displayed, pressing and hol ding the Y or B button causes the display to a u tomatically increment.
c
n/a = not applicable
d
ERV Operation: When in Cooling mode AND the conditions are NOT OK for economizing --- th e 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 S T A T U S --- > O C C U P I E D
– 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 OCC UPIED 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 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 TYPE = 2SPEED
LLECON--02SI
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