Carrier TC Supplement Manual page 20

Factory-installed economizers for rooftop units 3 to 27.5 nominal tons, related to california title 24
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Table 11 – Dry Bulb Operation No DCV (CO
Demand
Outside Air ---
Control Ventilation
Good to
(DCV)
economize?
None
No
None
Yes
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.
b
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.
c
Does not apply to KC/KCQ 04 ---06 or HC/HCQ/TC/TCQ 04 ---07 units
Table 12 – Dry Bulb Operation With DCV (CO
Demand
Outside Air ---
Control Ventilation
Good to
(DCV)
economize?
No
Below set
Yes
No
Above set
Yes
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.
b
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.
c
Does not apply to KC/KCQ 04 ---06 or HC/HCQ/TC/TCQ 04 ---07 units
Y1‐I
Y2-I
Fan Speed
Off
Off
Low
0-v/Off
On
Off
Low
24-v/On
On
On
High
24-v/On
Off
Off
Low
0-v/Off
On
Off
Low
0-v/Off
DELAY
On
On
High
24-v/On
Y1‐I
Y2-I
Fan Speed
Off
Off
Low
0-v/Off
On
Off
Low
24-v/On
On
On
High
24-v/On
Off
Off
Low
0-v/Off
On
Off
Low
0-v/Off
On
On
High
24-v/On
Off
Off
Low
0-v/Off
On
Off
Low
24-v/On
On
On
High
24-v/On
Off
Off
Low
0-v/Off
On
Off
Low
0-v/Off
DELAY
On
On
High
24-v/On
Sensor) - - 2 Speed Fan
2
Y1-O
Y2-O
Occupied
0-v/Off
MIN POS L
0-v/Off
MIN POS L
24-v/On
MIN POS H
0-v/Off
MIN POS L
0-v/Off
MIN POS L to Full- Open
b
a
0-v/Off
MIN POS H to Full- Open
Sensor) - - 2 Speed Fan
2
Y1-O
Y2-O
Occupied
0-v/Off
VENTMIN L
0-v/Off
VENTMIN L
24-v/On
VENTMIN H
0-v/Off
VENTMIN L
0-v/Off
VENTMIN L to Full- Open
a
0-v/Off
VENTMIN H to Full- Open
0-v/Off
VENTMIN L to VENTMAX
0-v/Off
VENTMIN L to VENTMAX
24-v/On
VENTMIN H to VENTMAX
0-v/Off
VENTMIN L to VENTMAX
0-v/Off
VENTMIN L to Full- Open
b
a
0-v/Off
VENTMIN H to Full- Open
20
c
Unoccupied
Closed
Closed
Closed
Closed
Closed to Full-Open
Closed to Full-Open
c
Unoccupied
Closed
Closed
Closed
Closed
Closed to Full-Open
Closed to Full-Open
Closed
Closed
Closed
Closed
Closed to Full-Open
Closed to Full-Open

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