Cooling Operation For Outdoor Air Unit - Fujitsu Airstage VR-II Series Service Manual

3-2-2 Auto Changeover Heating / Cooling Operation for Outdoor air unit
[Function available Outdoor air unit(s)]
Connectable type : All Outdoor air units
Connectable type : Administrative outdoor air unit (Management Outdoor air unit).
Refer to the setting Method
Setting Method
1. Switch operation mode management to "Management by outdoor air unit" by RB unit DIP-SW.
2. Set the master outdoor air unit by wired remote controller.
3. Judge cooling/heating by the difference between the master outdoor air unit's setting temperature
and the suction airflow temperature
AUTO CHANGEOVER operation
Operation flow chart
START
Suction airflow temp.
Ts+9°F(+5°C) ?
NO
Suction airflow temp.
Ts- 9°F(-5°C) ?
HEATING OPERATION
Thermostat remains
YES
in OFF state for 6 minutes or
longer?
System stops
YES
or operation command other than
auto changeover operation?
YES
T Setting temperature
NO
:
S
YES
NO
NO
COOLING OPERATION
Thermostat remains
in OFF state for 6 minutes or
longer?
NO
System stops
or operation command other than
auto changeover operation?
NO
+1
03-04
YES
YES