40
*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 sec-
ond stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.
†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 14 — 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 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 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
Summary of Contents for Preferred 549J 04
Page 4: ...4 Fig 2 549J 04 06 Units Built On and After 4 15 2019...
Page 5: ...5 Fig 3 549J 04 06 Units Built Prior to 4 15 2019...
Page 6: ...6 Fig 4 549J 04 06 Corner Weights and Clearances...
Page 7: ...7 Fig 5 549J 04 06 Base Rail Details...
Page 8: ...8 Fig 6 549J 04 06 Thru the Base Charts...
Page 23: ...23 Fig 41 Electro Mechanical Control Wiring 208 230v 460v...
Page 24: ...24 Fig 42 Electro Mechanical Control Wiring 575v...
Page 25: ...25 Fig 43 Electro Mechanical Power Wiring 208 230 1 60...
Page 26: ...26 Fig 44 Electro Mechanical Power Wiring 208 230 3 60...
Page 27: ...27 Fig 45 Electro Mechanical Power Wiring 460 3 60...
Page 28: ...28 Fig 46 Electro Mechanical Power Wiring 575 3 60...
