Ahu Application With; Communication (Optional) - Navien NPE-180A2 Installation Manual

8.9 AHU Application with RS-485 Communication (optional)
This application is designed to work with the single unit ONLY.
Note
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The air handler must also be compatible with RS-485 communication features. Consult with the
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air handler manufacturer for additional guidelines and instructions.
Thermostat
Air Eliminator
For details, contact the AHU manufacturer.
System application drawings are intended to explain the system piping concept only. Refer to
Note
"7.5.1.3 Setting the Application" on page 100 for communication setting.
NPE-A2 Series
Water Heater
COMM Cable
Circulator
Air Purge Valve
Expansion Tank
A/C or H/P
Condensing Unit
Outdoor Sensor
DHW Cold Water Recirculation
Supply Supply
Mixing
Valve
Check Valve
Water
Appendixes 139