Bosch Worcester Greenstar HIU E Installation And Maintenance Instructions Manual page 45

Key to Central heating performance chart, Figure 56:
[1] Supply volumetric flow rate [l/s] and [l/h].
[2] Supply flow temperature [ °C].
[3] Supply differential pressure [kPa] (Standard unit).
[4] Supply differential pressure [kPa] (Standard unit and heat
meter).
[5] Supply differential pressure [kPa] (Standard unit and Differential
pressure control valve).
[6] Supply differential pressure [kPa] (Standard unit, Differential
pressure control valve and heat meter).
Central heating example
The central heating performance chart, (figure 56, page 44) shows an
example for calculating the central heating performance.
• [a] [ °C] Supply temperature = 65 °C
• [b] 50/30 °C (15.0 kW) Return temperature = 34.8 °C
• [c] [l/s]/[l/h] Supply volumetric flow rate = 0.123l/s / 442.8l/
h
• [d] [kPa] Supply differential pressure
– [Standard unit] = 6.8kPa
– [Standard unit with heat metre] = 10.9kPa
– [Standard unit with Differential pressure control valve] =
11.2kPa
– [Standard unit with Differential pressure control valve and heat
meter] = 15.5kPa
6 720 808 928 (2017/06)
Commissioning
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