47
*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
b
y turning on the fan to high and opening the OA damper 100%
b
efore the first stage mechanical cooling is ena
b
led.
†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
b
een 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
b
y turning on the fan to high and opening the OA damper 100%
b
efore the first stage mechanical cooling is ena
b
led.
†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
b
een satisfied.
Table 18 — 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 CO
2
Set
No
OFF
OFF
LOW
0v/Off
0v/Off
VENTMIN
Closed
ON
OFF
LOW
24v/On
0v/Off
VENTMIN
Closed
ON
ON
HIGH
24v/On
24v/On
VENTMIN
Closed
Yes
OFF
OFF
LOW
0v/Off
0v/Off
VENTMIN
Closed
ON
OFF
LOW
0v/Off
0v/Off
VENTMIN to
Full-Open
Closed to Full-Open
ON
ON
HIGH
24v/On
0v/Off
VENTMIN to
Full-Open
Closed to Full-Open
Above CO
2
Set
No
OFF
OFF
LOW
0v/Off
0v/Off
VENTMIN to
VENTMAX
Closed
ON
OFF
LOW
24v/On
0v/Off
VENTMIN to
VENTMAX
Closed
ON
ON
HIGH
24v/On
24v/On
VENTMIN to
VENTMAX
Closed
Yes
OFF
OFF
LOW
0v/Off
0v/Off
VENTMIN to
VENTMAX
Closed
ON
OFF
LOW
0v/Off
0v/Off
VENTMIN to
Full-Open
Closed to Full-Open
ON
ON
HIGH
DELAY*
24v/On
0v/Off†
VENTMIN to
Full-Open
Closed to Full-Open
Table 19 — Enthalpy Operation without 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
NO CO
2
SENSOR
NO
OFF
OFF
LOW
0v/Off
0v/Off
MIN POS
Closed
ON
OFF
LOW
24v/On
0v/Off
MIN POS
Closed
ON
ON
HIGH
24v/On
24v/On
MIN POS
Closed
YES
OFF
OFF
LOW
0v/Off
0v/Off
MIN POS
Closed
ON
OFF
LOW
0v/Off
0v/Off
MIN POS to Full Open
Closed to Full-Open
ON
ON
HIGH
DELAY*
24v/On
0v/Off†
MIN POS to Full Open
Closed to Full-Open
Summary of Contents for 50LC 14
Page 26: ...26 Fig 34 50LC 14 26 Control Wiring Diagram...
Page 27: ...27 Fig 35 50LC 14 26 RTU Open Control Wiring Diagram...
Page 28: ...28 Fig 36 50LC 14 20 208 230V 3 Phase Power Wiring Diagram...
Page 29: ...29 Fig 37 50LC 24 26 208 230V 3 Phase Power Wiring Diagram...
Page 30: ...30 Fig 38 50LC 14 26 460V 575V 3 Phase Power Wiring Diagram...