Table of Contents
Advertisement
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
) 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.
NOTES:
STATUS OCCUPIED — The factory-standard Occupancy sig-
1.
nal 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 con-
nector and to the W7220's OCC input terminal. An external time-
clock or relay is required to implement an Occupancy 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
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
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
or
button
FAN SPEED = 2SP H/C
NOTE: 3SPEED is not used on 582K units.
35
Advertisement
Table of Contents
