Carrier CRECOMZR103A00 - Appendix B - Sequence of Operation

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APPENDIX B — SEQUENCE OF OPERATION EXAMPLES
Table B — Fixed Dry-Bulb without DCV (CO
2
Sensor) — 2-Speed Fan
THERMOSTAT ECONOMIZER
CONTROL MODE OCCUPIED
OA GOOD TO
ECONOMIZE?
Y1I Y2I Y1O Y2O
DAMPER
POSITION
CONVENTIONAL
Cooling Yes
N/A Off Off Off Off Min Pos L
Yes
On Off Off Off Min Pos L to 100%
On On, <15 mins On Off Min Pos H to 100%
On On, >15 mins On On/Off
a
,
b
NOTE(S):
a. If Y2I is ON for more than a set time (15 minutes by default) and the OAT is greater than MAT setpoint (3MATSET), then Relay 2 energizes to allow Y2 pass-through to
enable Cooling Stage 2.
b. Configure 3STG3 DLY under Advanced Settings on page 27 to change to another set time.
Min Pos H to 100%
No
On Off On Off Min Pos L
On On On On Min Pos H
Heating Yes N/A Off Off Off Off Min Pos H
Cooling No
N/A Off Off Off Off Closed
Yes
On Off Off Off Closed to 100%
On On, <15 mins On Off Closed to 100%
On On, >15 mins On On/Off
a,b
Closed to 100%
No
On Off On Off Closed
On On On On Closed
Heating No N/A Off Off Off Off Closed
HEAT PUMP
Cooling Yes
N/A Off Off Off Off Min Pos L
Yes
On Off Off Off Min Pos L to 100%
On On, <15 mins On Off Min Pos H to 100%
On On, >15 mins On On/Off
a,b
Min Pos H to 100%
No
On Off On Off Min Pos L
On On On On Min Pos H
Heating Yes N/A
Off Off Off Off Min Pos H
On Off On Off Min Pos H
On On On On Min Pos H
Cooling No
N/A Off Off Off Off Closed
Yes
On Off Off Off Closed to 100%
On On, <15 mins On Off Closed to 100%
On On, >15 mins On On/Off
a,b
Closed to 100%
No
On Off On Off Closed
On On On On Closed
Heating No N/A
Off Off Off Off Closed
On Off On Off Closed
On On On On Closed