Navien NFB-175H, Руководство по установке, Страница: 34 / 135

34 Installing the System Piping
3.5.4 System Application - Air Handler System
Air Flow
Air Handler
System Pump
(Boiler Pump)
Make-up Water
Expansion Tank
Backflow preventer
Pressure reducing valve
Air Separator
Note
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System application drawings are intended to explain the system piping concept only.
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Install a filter in the system return to remove foreign objects from the system. Foreign objects inside
the system may result in abnormal system operation.
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Refer to “3.3 Filling the System” on page 28 for make-up water connections and refer to the
requirements of your local codes to ensure compliance.
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Air handlers with an internal pump shall be piped either with a crossover pipe at the AHU or in a
primary/secondary configuration with the boiler.
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Refer to the “3.6.9 Wiring Diagram - Air Handler” on page 45 for wiring connections.
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You can use a secondary piping configuration for the air handler system to maintain optimal flow
and heat capacity.