eta System Separation Module, Operating Instructions Manual

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Secondary side characteristic curve Description
3.3 Secondary side characteristic
curve
Secondary side characteristic curves
Example: underfloor heating with 15 kW and 10 K
spread is attached on the secondary side. The
performance chart shows a flow rate of approx.
1.30 m³/h.
=> 1.30 m³/h a free residual pump head of 3.5 m
occurs on the secondary side with a pressure loss of
approx 1.6 m.
Performance chart
Free residual pump head
1 Pump head
2 Module pressure loss
3 Free residual pump head
Primary spread
Flow - return
Secondary spread
Flow - return
75 °C - 35 °C = 40 K 35 °C - 30 °C = 5 K
75 °C - 33 °C = 42 K 35 °C - 28 °C = 7 K
75 °C - 30 °C = 45 K 35 °C - 25 °C = 10 K
75 °C - 45 °C = 30 K 60 °C - 40 °C = 20 K