Criterion 6.3.4 System Failure Prevention

Criterion text:
The control subsystem shall be so designed that, in the event of a power failure or a failure of any of the system components, the temperatures or pressures developed in the SWH system shall not damage the system, or the building, or endanger its occupants.

Comments:
Installers must follow the manufacturer's SRCC approved installation instructions and design methods. A solar collector that continues to receive solar radiation after flow stops during a power failure can generate dangerous temperatures and pressures. During design review, the control strategy is evaluated to determine whether unsafe conditions could arise.

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