Service Manual

03-04
+1
3-2-2 Auto Changeover Heating / Cooling Operation for Outdoor air unit
Operation flow chart
START
Suction airflow temp.
Suction airflow temp.
Ts+9°F(+5°C) ?
COOLING OPERATION
HEATING OPERATION
YES
YES
NO
NO
NO
NO
YES
YES
AUTO CHANGEOVER operation
TS : Setting temperature
Ts- 9°F(-5°C) ?
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
Thermostat remains
in OFF state for 6 minutes or
longer?
System stops
or operation command other than
auto changeover operation?
NO
NO
Thermostat remains
in OFF state for 6 minutes or
longer?
System stops
or operation command other than
auto changeover operation?
YES
YES
Connectable type : All Outdoor air units
[Function available Outdoor air unit(s)]
Connectable type : Administrative outdoor air unit (Management Outdoor air unit).
Refer to the setting Method