Nature's Comfort NCB-175, Инструкция по установке и эксплуатации

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Crimp the sheet metal to the edge of the heat exchanger (item G) using channel-lock pliers. This
not only forms a virtually airtight seal, but also supports the heat exchanger as well.
J. Adjusting Plenum Air Flow
The motors on most force air furnaces have three speeds to provide various rates of air movement.
Please consult a local furnace specialist if you want to change the airflow of an existing furnace
system.
K. Installing On An Existing Indoor Boiler
The NCB boiler may be connected to an existing boiler system. A water-to-water plate heat
exchanger is needed to transfer heat from the outdoor boiler to the indoor hydronic system so that
the two systems remain isolated (see next diagram).
As shown in the above figure, the two systems are totally isolated from each other so that the
existing hydronic system remains undisturbed and functions exactly as it did before. Water that
circulates through the outdoor boiler is never circulated through the home’s hydronic system or
vice-versa.
All pumps and controls remain essentially the same on the existing system but you will need to
keep the burner on the hydronic furnace from firing.
The electrical diagram on the next page shows a typical control setup for operating a 2 zone radiant
system for a new installation that does not use an existing hydronic furnace. Part numbers are
noted on each item for ordering from a Nature’s Comfort dealer.