Installing The Device In An Npe-180A/240A Water Heater - Navien NPE-180A Installation Manual

WARNING
A mixing valve must be installed in the system in order to limit the DHW output
temperature and prevent scalding. Setting the mixing valve to 115–120℉ is
recommended.
Note
 Install a spring check valve for vertical pipe runs. Do not use a swing check valve
with vertical piping.
 Install either a spring check valve or a swing check valve in a horizontal pipe run.
 An outdoor sensor and a flow switch are supplied with the product.
 Use 18 AWG cables for thermostat wiring.
 Install NSF certified mixing valves and expansion tanks ONLY.
2.2 Installing the Device in an NPE-180A/240A Water
Heater
Follow the instructions to install the Navien ComfortAir
heater.
1. Turn off the power supply to the water heater.
2. Remove the water heater's front cover by loosening the four screws securing it
to the case.
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in an NPE-180A/240A water
Installing the Device 9