516 01 3604 04
Specifications subject to change without notice.
35
LEGEND
* Table 12 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
fan operation 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.
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 down
-
stream 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 SPEED = 2SPEED
For damper minimum position settings and checkout menu
readings, see Table 13. See Tables 14-21 for dry bulb and
enthalpy sequence of operation.
*With stage 3 delay (STG3 DLY) in Advanced setup menu, second stage of mechanical cooling Y2-O can be turned on after the delay if the calls for
Y1-I and Y2-I have not been satisfied.
ALARM
(cont)
SYS ALARM
N/A
N/A
When AUX1-O is set to SYS and there is any alarm (e.g., failed
sensors, etc.), the AUX1-O terminal has 24 Vac out.
ACT UNDER V
N/A
N/A
ACTUATOR VOLTAGE LOW
Voltage received by actuator is above expected range.
ACT OVER V
N/A
N/A
ACTUATOR VOLTAGE HIGH
Voltage received by actuator is below expected range.
ACT STALLED
N/A
N/A
ACTUATOR STALLED
Actuator stopped before achieving commanded position.
Table 12 —
Menu Structure* (cont)
MENU
PARAMETER
PARAMETER
DEFAULT
VALUE
PARAMETER
RANGE AND
INCREMENT
†
NOTES
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 13 — Damper Minimum Position Settings and Readings on Checkout Menu
DEMAND CONTROLLED VENTILATION
(CO
2
SENSOR)
FAN SPEED
SETPOINTS
CHECKOUT
NO
1
MIN POS
VMAX – HS
N/A
N/A
2
MIN POS H
VMAX – HS
MIN POS L
VMAX – LS
YES
1
VENT MIN
VMIN – HS
VENT MAX
VMAX – HS
2
VENT MIN H
VMIN – HS
VENT MAX H
VMAX – LS
VENT MIN L
N/A
VENT MAX L
N/A
Table 14 — Dry Bulb Operation, No Demand Controlled Ventilation (DCV) (CO
2
Sensor) — 1 Speed Fan
DCV
OUTSIDE AIR
GOOD TO
ECONOMIZE?
Y1-I
Y2-I
FAN SPEED
Y1-O
Y2-O
OCCUPIED
UNOCCUPIED
None
No
Off
Off
High
0-v/Off
0-v/Off
MIN POS
Closed
On
Off
High
24-v/On
0-v/Off
MIN POS
Closed
On
On
High
24-v/On
24-v/On
MIN POS
Closed
Yes
Off
Off
High
0-v/Off
0-v/Off
MIN POS
Closed
On
Off
High
0-v/Off
0-v/Off
MIN POS to Full-Open
Closed to Full-Open
On
On
High
24-v/On
24-v/Off* MIN POS to Full-Open
Closed to Full-Open
