AquaMAX G270VE Series - Manual (Page 30)

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Two Temperature Zone Plumbing Diagram
Circulated Hot Water Flow & Return Systems
For circulated hot water flow and return systems, a temperature limiting
device can only be installed on a dead leg which branches off the circulated
hot water flow and return pipe.
Warning: Installing a temperature limiting device in the circulated flow
and return pipe work, or circulating tempered water from a temperature
limiting device may cause water to be delivered to ablution areas at a
temperature exceeding the requirements of AS/NZS 3500.4.