Hitachi PC-ARFG2-Z - 22.1 Backup System Setting Items

22. Backup System Setting
40
A16381H9HF
3. Backup operation in high load
If there is a dierence between the room temperature and the setting temperature (
※
1), the standby refrigerant
systems start to operate.
System Example
Procedure of high load backup operation
Rotation Cycle Time
System1
System2
Operation
Standby
30Mins
Standby
Operation
Operation
High load backup startup
Standby
Operation
High load backup operationȤ2
※
1: Cooling/Heating: 2
o
C to 5
o
C(2
o
F to 5
o
F).
※
2: When the high load backup operation is nished, it turns into the rotation operation.
All standby systems are in operation.
22.1 Backup System Setting Items
1. Enable/Disable Backup System
This function is to enable/disable rotation operation.
Enable: Start rotation operation.
Disable: Rotation operation is invalid.(Default)
2. Rotation Cycle Time
Rotation cycle time can be set from "9 hours"(default), "24 hours", "48 hours", "72 hours" and "96 hours".
3. No. of Refrig. Systems to Operate
System Example
System 1 System 2
System 1 System 2
System 4System 3