Bryant 549J Series, Installation Instructions Manual

Page: 35 / 52

35
Table 18 – Dry Bulb Operation No DCV (CO
2
Sensor) -- 2 Speed Fan
Demand
Controlled
Ventilation
(DCV)
Outside Air ---
Good to
economize?
Y1
‐
I Y2-I Fan Speed Y1-O Y2-O Occupied Unoccupied
None No
Off Off Low 0-v/Off 0-v/Off MIN POS L Closed
On Off Low 24-v/On 0-v/Off MIN POS L Closed
On On High 24-v/On 24-v/On MIN POS H Closed
None Yes
Off Off Low 0-v/Off 0-v/Off MIN POS L Closed
On Off Low 0-v/Off 0-v/Off MIN POS L to Full-Open Closed to Full-Open
On On High
DELAY [
24-v/On
0-v/Off * MIN POS H to Full-Open Closed to Full-Open
*
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1---I and Y2---I
have not been satisfied.
[ With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second
stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.
Table 19 – Dry Bulb Operation With DCV (CO
2
Sensor) -- 2 Speed Fan
Demand
Controlled
Ventilation
(DCV)
Outside Air ---
Good to
economize?
Y1
‐
I Y2-I Fan Speed Y1-O Y2-O Occupied Unoccupied
Below set
No
Off Off Low 0-v/Off 0-v/Off VENTMIN L Closed
On Off Low 24-v/On 0-v/Off VENTMIN L Closed
On On High 24-v/On 24-v/On VENTMIN H Closed
Yes
Off Off Low 0-v/Off 0-v/Off VENTMIN L Closed
On Off Low 0-v/Off 0-v/Off VENTMIN L to Full-Open Closed to Full-Open
On On High 24-v/On 0-v/Off* VENTMIN H to Full-Open Closed to Full-Open
Above set
No
Off Off Low 0-v/Off 0-v/Off VENTMIN L to VENTMAX Closed
On Off Low 24-v/On 0-v/Off VENTMIN L to VENTMAX Closed
On On High 24-v/On 24-v/On VENTMIN H to VENTMAX Closed
Yes
Off Off Low 0-v/Off 0-v/Off VENTMIN L to VENTMAX Closed
On Off Low 0-v/Off 0-v/Off VENTMIN L to Full-Open Closed to Full-Open
On On High
DELAY [
24-v/On
0-v/Off * VENTMIN H to Full-Open Closed to Full-Open
*
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1---I and Y2---I
have not been satisfied.
[ With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second
stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.