Navien CH-180 Installation Manual - page 47
Outdoor Temperature Sensor (Optional):
Outdoor Temperature Sensor Installation
Outdoor Temperature Sensor Installation Guidelines
Pull the terminal block out
Attach the body to the wall with screws/anchors provided
Run wire into the body through grommet opening
Connect wires to the terminal block
Reinstall the terminal block into the Attach the cap to the body
Attach the cap to the body
Avoid areas with temperature fluctuations caused by direct sunlight, and not
representative of true outdoor temperature.
Best location is on North or Northeast side of structure under eave or shielded from
direct sunlight.
Avoid placing sensor in close proximity of heat sources that may affect correct
temperature sensing. (fans, exhausts, vents, lights)
Use 18 gauge wiring (thermostat wiring) with no splices. (except at unit harness
connection with yellow leader wire)
Caution should be taken to avoid potential electromagnetic interference (EMI) by
routing separately from potential sources such as line voltage wiring. When
necessary, shielded cable may be used.
The unit is a water resistant device, but any damage to the device may require
replacing the entire component.
Avoid placing sensor in area subjected to excessive moisture.
Make sure wiring connections are secure before closing the cap.
References for the data and temperature of sensor are on the back of this page.
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OUTDOOR TEMPERATURE SNESOR