Trane Foundation EBC180, Installation, Operation And Maintenance Manual

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30 RT-SVX50J-EN
Table 8. Enthalpy operation with DCV (CO
2
sensor) - 1 speed fan
DCV
OA Good to
economize?
Y1-I Y2-I FAN SPD 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
(a)
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 (a)
VENTMIN to Full-Open Closed to Full-Open
(a) With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on 2nd stage of mechanical cooling Y2-O after the delay if the call for Y1-I and Y2-I have
not been satisfied.
Table 9. Dry bulb operation no DCV (CO
2
sensor) - 2 speed fan
DCV
OA Good to
economize?
Y1-I Y2-I FAN SPD 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 (a) 0-v/Off (b) MIN POS H to Full-Open Closed to Full-Open
(a) 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.
(b) With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on 2nd stage of mechanical cooling Y2-O after the delay if the call for Y1-I and Y2-I have
not been satisfied.
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