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LEGEND AND NOTES FOR TABLE 11
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
2
eters appear.
† When values are displayed, pressing and holding the
ton 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 Heating mode, the ERV terminal will be energized when the OA
is below the ERV OAT setpoint in the setpoint menu.
) sensor, then none of the DCV param-
or
NOTES:
STATUS OCCUPIED — The factory-standard Occupancy
1.
signal originates with a thermostat or other controller call for
indoor fan operation at UCB terminal G. This signal passes
through the Unit Control 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 Occu-
pancy schedule on the economizer damper position.
STATUS MA TEMP, SETPOINTS MAT SET — The W7220
2.
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 sen-
sor is designated as Supply Air Temperature (SAT) sensor.
SETPOINTS DRYBLB SET — This point is not displayed if a
3.
Return Air (differential) temperature sensor or an Outdoor Air en-
thalpy sensor is connected.
4.
SYSTEM SETUP parameters must be configured as noted for
Multi-Speed unit operation:
EQUIPMENT = CONV
AUX2 IN = W
FAN SPEED = 2SPEED
or
FAN SPEED = 2SP C/H
but-
NOTE: 3SPEED is not used on 48FC units.
35
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