Navien NFB‑C Series User Manual

69Installing a Cascade System
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System Application #4 - Cascade System with DHW Indirect Tank
12” (30 cm)
maximum
Sub2
Sub1
Main
Temperature
sensors (required)
Cold water
Supply
Return
Back flow preventor
Expansion tank
Cold water
DHW
Indirect tank
Aquastat
Air separator
Note
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Connect the aquastat on the DHW indirect tank to the main unit.
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Connect the DHW pump to the main unit.
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Depending on the installation environment, the supply top and return top piping option can be applied.
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System Application #5 - Cascade System with DHW Indirect Tank
Sub2
Sub1Main
Cold water
Supply
Indirect tank
Aquastat
Cold water
DHW
Return
Dirt collector
Hydro/Air separator
Back flow preventor
Expansion tank
Temperature
sensors (required)
Note
Ɣ
Connect the aquastat on the DHW indirect tank to the main unit.
Ɣ
Connect the DHW pump to the main unit.
Ɣ
Depending on the installation environment, the supply top and return top piping option can be applied.

Navien NFB‑C Series Specifications

General

Brand	Navien
Model	NFB‑C Series
Category	Boiler
Language	English