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FEATURES & SPECIFICATIONS
HeatNet Control V3 3.x
Page 10
KN-Series Plus Additional Features
To maximize efficiency, the KN-Series Plus control now engages a secondary heat
exchanger pump. A flow sensor monitors the flow through the stainless-steel
secondary heat exchanger. This preheats the system return water to decrease energy
consumption and increases the overall efficiency in excess of 95%.
Figure 2
Secondary HX Pump Relay R20
When a Heat Demand is generated, in addition to the System pump and Local
pump outputs, the Secondary Heat Exchanger pump relay (R20) is energized
via the K-10 Stage 3 relay. This, pre-heats the return water by diverting it
through the Secondary Heat Exchanger prior to entering the Primary Heat
Exchanger.
Figure 3
A
Current Switch Provides Proof of Secondary HX Pump Operation