Criterion 6.1.1.1 Operating Limits

Criterion text:
Means shall be provided to protect the SWH system within the design limits of temperature and pressure.

Comments:
The differential controller high limit switch can be used to meet this requirement. (See Figure 1) (See also 6.3.5 High Temperature Control)

Figure 1

In systems not using a differential controller, proper system design and sizing may address the requirements of this criterion.

Installers must use the system components and plumbing strategy provided by the SRCC certified manufacturer (See Figure 2). Individual systems must also be sized for the specific load – family size.

Figure 2

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