33
APPENDIX B — SEQUENCE OF OPERATION EXAMPLES (CONT)
Table C — Fixed Dry-Bulb With DCV (CO
2
Sensor) — 2-Speed Fan In Conventional Mode (cont)
THERMOSTAT ECONOMIZER
CONTROL MODE OCCUPIED
OA GOOD TO
ECONOMIZE?
CO
2
Y1I Y2I Y1O Y2O
DAMPER
POSITION
EF (1 OR 2
)
a
a. Configure 3STG3 DLY under Advanced Settings to change to another set time.
HEAT PUMP
Cooling
Yes
No
SP On Off On Off VENT MIN L Off
SP On On On On VENT MIN L Off
Heating N/A
>SP Off Off Off Off
VENT MIN H to
VENT MAX H
On/Off
b
b. The controller energizes Exhaust Fan Relay 1 and Exhaust Fan Relay 2 if the damper position reaches Exhaust Fan 1 parameter setting and Exhaust Fan Relay 2
parameter setting respectively.
>SP On Off On Off
VENT MIN H to
VENT MAX H
On/Off
b
>SP On On On On
VENT MIN H to
VENT MAX H
On/Off
b
SP Off Off Off Off VENT MIN H Off
SP On Off On Off VENT MIN H Off
SP On On On On VENT MIN H Off
Cooling
No N/A N/A Off Off Off Off Closed Off
No Yes N/A
On Off Off Off Closed to 100% On
On On On On/Off
c
c. If Y2I is ON for less than a set time (15 minutes by default), then Relay 2 is OFF. If Y2I is ON for more than a set time and the OAT is greater than MAT setpoint (3MAT
SET), then Relay 2 energizes to allow Y2 pass-through to enable Cooling Stage 2.
100% On
No No N/A
On Off On Off Closed Off
On On On On Closed Off
Heating No N/A N/A
Off Off Off Off Closed Off
On Off On Off Closed Off
On On On On Closed Off
To Next Page
Loading...
