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Figure 9 – LP-179-Z - NOTE: This drawing is meant to demonstrate system piping only. The installer is
responsible for all equipment and detailing required by local codes. In Massachusetts, you must install a
vacuum relief valve per 248 CMR. NOTE: For proper operation, it is important to pipe recirculation lines with
thermostatic mixing valve as shown above.
An ASSE 1017 thermostatic mixing valve MUST be installed when using outdoor reset. Failure to do so
could result in substantial property damage, serious injury, or death.
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