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Ball Valve
Check Valve
Expansion Tank
Check Valve
City Water Supply
* When the optional temperature sensor is installed, it must be insulated. The sensor wire may be extended by up to 100 ft
(30 m) using 22AWG wire.
External Recirculation with HotButton and NaviCirc (Optional)
The following diagram shows the basic operation of an NHW700 Series water heater recirculation system with
the NaviCirc.
Install the NaviCirc to the faucet farthest from the water heater. If installed in close proximity to
Note
●
the water heater, faucet pipes far away may not be properly heated.
For details, refer to the manual provided with the NaviCirc kit.
●
Push Button
Contact Signal
To Cold Water Inlet
DHW Return
(To Recirculation Inlet)
DHW Supply
(To Hot Water Fixtures)
Cold Water Line
NaviCirc is a circulation device for standard domestic hot water lines
without a recirculation system. It allows domestic hot water lines and
domestic cold water lines to connect to the NaviCirc and preheat hot water
lines by circulating hot and cold water through the NaviCirc. This prevents
hot water loss and heating time loss.
To prevent too much hot water from flowing into the cold water line, the
NaviCirc includes a feature that automatically blocks circulation when
reaching a temperature of approximately 95°F (35°C).
Push Button
Push Button
Contact Signal
Contact Signal
Temperature
Sensor*
Installing the Water Heater
31
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