Bryant 551J Series, Installation Instructions Manual

Page: 33 / 56

33
Table 11 – Enthalpy Operation No DCV (CO
2
Sensor) -- 1 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 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
None 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 0-v/Off* MIN POS 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.
Table 12 – Enthalpy Operation With DCV (CO
2
Sensor) -- 1 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 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 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 L to VENTMAX Closed
On On High 24-v/On 24-v/On VENTMIN H to VENTMAX Closed
Yes
Off Off High 0
-v/Off
0-v/Off VENTMIN L to VENTMAX Closed
On Off High 0-v/Off 0-v/Off VENTMIN to Full-Open Closed to Full-Open
On On High
DELAY [
24-v/On
0-v/Off* VENTMIN 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.