Bosch Worcester Greenstar HIU E Installation And Maintenance Instructions Manual page 43

Key to Domestic hot water performance chart, Figure 55:
[1] Domestic hot water power output [kW].
[2] Supply return temperature.
[3] Supply flow temperature.
[4] Supply volumetric flow rate [l/s] and [l/h].
[5] Domestic hot water maximum volumetric flow rate [l/m].
[6] Supply differential pressure [kPa] (Standard unit).
[7] Supply differential pressure [kPa] (Standard unit and heat
meter).
[8] Supply differential pressure [kPa] (Standard unit and Differential
pressure control valve).
[9] Supply differential pressure [kPa] (Standard unit, Differential
pressure control valve and heat meter).
[10] Domestic hot water standard performance range.
[11] Domestic hot water high performance range
Domestic hot water example
The domestic hot water performance chart, (figure 55, page 42) shows
an example for calculating the domestic hot water performance.
• [a] [l/m] Domestic hot water flow rate = 12 l/m
• [b] Supply temperature
– 45 °C (Δ35K) flow = 65 °C
– 45 °C (Δ35K) return = 23 °C
• [c] [l/s]/[l/h] Supply volumetric flow rate = 0.168 l/s / 604.8
l/h
• [d] [kPa] Supply differential pressure
– [Standard unit] = 13.13 kPa
– [Standard unit with heat meter] = 21.2 kPa
– [Standard unit with Differential pressure control valve] = 22.35
kPa
– [Standard unit with Differential pressure control valve and heat
meter] = 29.4 kPa
6 720 808 928 (2017/06)
Commissioning
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