T-H2-DV/T-H2-OS Service Manual
Ver. 1.01
74
CONFIDENTIAL
12-10. Operation time for unit rotation
The unit that turns on first is whichever unit the T-H2-DV/T-H2-OS decides is the primary unit.
The priority unit will rotate when it reaches 100 ON/OFF cycles or after 12 hours of operation.
NOTE: The priority unit is the unit that turns on first when there is a hot water demand.
When there is a black out and/or cut off for over 50 minutes, priority unit will switch back to
Unit #1.
Example: Four units of T-H2-DV/T-H2-OSs Rotation
A rotation occurs when:
ON/OFF cycles (×100 times) or Hours of operation (12 hours)
Unit
No.1
Unit
No.2
Unit
No.3
Unit
No.4
Priority Unit
1
2
3
4
Priority Unit
4
1
2
3
Priority Unit
3
4
1
2
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