50
*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.
*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.
ENTHALPY SETTINGS
When the OA temperature, enthalpy and dew point are below the
respective set points, the Outdoor Air can be used for economiz
-
ing. Figure 72 shows the new single enthalpy boundaries in the
W7220. There are 5 boundaries (set points ES1 through ES5),
which are defined by dry bulb temperature, enthalpy and dew
point.
Refer to Table 27 for ENTH CURVE set point values.
Fig. 72 — Single Enthalpy Curve Boundaries
Table 25 — 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
Table 26 — Enthalpy 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
ECONOMIZING
AVAILABLE
NOT AVAILABLE
ENTHALPY
RA
HUM (%RH)
RA
TEMP
TEMPERATURE
ABSOLUTE HUMIDITY
ES5
ES4
ES3
ES2
ES1
HL
P1
(T,RH)
P2 (T,RH)
SINGLE ENTHALPY
DUAL ENTHALPY
HIGH LIMIT
Содержание 547K
Страница 94: ...94 APPENDIX D WIRING DIAGRAMS Fig I 547K 04 06 Power Wiring Diagram 208 230 1 60 ...
Страница 95: ...95 APPENDIX D WIRING DIAGRAMS Fig J 547K 04 07 Power Wiring Diagram 208 230 3 60 ...
Страница 96: ...96 APPENDIX D WIRING DIAGRAMS Fig K 5047K 04 07 Power Wiring Diagram 460 575 3 60 ...