Carrier WeatherMaster 50HC*D08 Series - Sequence of Operation

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For damper minimum position settings and checkout menu
readings, see Table 9.
Table 9 — Damper Minimum Position Settings and Readings on Checkout Menu
SEQUENCE OF OPERATION
See Tables 10-17 for dry bulb and enthalpy sequence of
operation.
Table 10 — Dry Bulb Operation, No Demand Controlled Ventilation (DCV) (CO
2
Sensor) — 1 Speed Fan
*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.
Table 11 — Dry Bulb Operation, With Demand Controlled Ventilation (DCV) (CO
2
Sensor) — 1 Speed Fan
*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.
FAN SPEED
DEMAND CONTROLLED VENTILATION
(CO
2
SENSOR)
SETPOINTS CHECKOUT
1 NO MIN POS VMAX – HS
1NON/A N/A
2 NO MIN POS H VMAX – HS
2 NO MIN POS L VMAX – LS
1 YES VENT MIN VMIN – HS
1 YES VENT MAX VMAX – HS
2 YES VENT MIN H VMIN – HS
2 YES VENT MAX H VMAX – LS
2 YES VENT MIN L N/A
2 YES VENT MAX L N/A
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
DCV
OUTSIDE AIR
GOOD TO
ECONOMIZE?
Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED
Below
CO
2
Set
No
Off Off High 0-v/Off 0-v/Off VENTMIN Closed
On Off High 24-v/On 0-v/Off VENTMIN Closed
On On High 24-v/On 24-v/On VENTMIN Closed
Yes
Off Off High 0-v/Off 0-v/Off VENTMIN Closed
On Off High 0-v/Off 0-v/Off VENTMIN to Full-Open Closed to Full-Open
On On High 24-v/On 0-v/Off* VENTMIN to Full-Open Closed to Full-Open
Above
CO
2
Set
No
Off Off High 0-v/Off 0-v/Off VENTMIN to VENTMAX Closed
On Off High 24-v/On 0-v/Off VENTMIN to VENTMAX Closed
On On High 24-v/On 24-v/On VENTMIN to VENTMAX Closed
Yes
Off Off High 0-v/Off 0-v/Off VENTMIN to VENTMAX Closed
On Off High 0-v/Off 0-v/Off VENTMIN to Full-Open Closed to Full-Open
On On High 24-v/On 0-v/Off* VENTMIN to Full-Open Closed to Full-Open