Tech Data - Worcester Greenstar HIU Installation And Maintenance Instructions Manual

Appendix
Setting Maximum head (nominal)
Curve 1 4 m
Curve 2 5 m
Curve 3 6 m
Table 32 Modulating speed characteristics
The head (pressure) is reduced at falling heat demand and increased at
rising heat demand.
13.2

Tech data

Weight excluding packaging
Weight including packaging
Minimum inlet pressure to achieve
nominal DHW flow rate
DHW output (50°C @ 40 K rise)
DHW output (90°C primary, 60°C DHW)
Heating output
Maximum flow temperature of primary
circuit
Maximum flow temperature of heating
circuit
Maximum DHW temperature
Maximum operating pressure
pH value range, approx. (heating)
Maximum primary differential pressure
(with internal DPCV)
Maximum DHW volumetric flow rate
Maximum volumetric flow rate of primary
circuit
Max. ambient temperature
Expansion vessel
Expansion vessel charge
electric
Electrical power supply voltage
Frequency
Maximum power consumption
Standby power consumption
Appliance protection rating
Table 33 Heat interface unit specifications
28
Maximum P1 (nominal)
25 W
33 W
39 W
HIU (...) HIU K (...)
kg 31 33
kg 34 36
bar 1.5 2.0
kW 41.8 58.6
kW 52,3 73,3
kW 1 - 15
°C 70
°C 70
°C 60
bar 10
6 – 9.5
bar 4 (without internal
DPCV: 0,8)
L/min 15 21
l/s 0.35 0.38
°C 35
l 5
bar 0.75
AC V 230
Hz 50
W 41.3
W 3.1
IP X4D
HIU (...)
Potable Hot Water output
Volumetric flow rate of primary
circuit
Primary circuit return temperature
Primary circuit pressure loss
without heat meter
Primary circuit pressure loss with
heat meter
HIU E (...)
Potable Hot Water output
Volumetric flow rate of primary
circuit
Primary circuit return temperature
Primary circuit pressure loss
without heat meter
Primary circuit pressure loss with
heat meter
HIU KE (...)
Potable Hot Water output
Volumetric flow rate of primary
circuit
Primary circuit return temperature
Primary circuit pressure loss
without heat meter
Primary circuit pressure loss with
heat meter
1) DHW temperature 40°C with 30 K increase
2) DHW temperature 45°C with 35 K increase
3) DHW temperature 50°C with 40 K increase
Table 34 Measured temperatures and volumetric flow rates
Integrator
Temperature Sensor
Temperature sensors
Diameter
Cable length
Temperature range
Starting temperature differential 
Flow measurement cycle with mains supply
Permissible temperature
Operation (<35 °C has a positive effect on lifetime)
Storage (>35 °C max. 4 weeks)
Min. temperature difference min
Max. temperature difference max
Table 35 Heat meter integrator technical data
Temperature Sensor
Resistance 
Temperature
°C
29529 0
18787 10
12257 20
Table 36 Primary circuit NTC central heating flow and return
temperature sensor
Primary circuit
1) 2)
65 °C 70 °C 80 °C
kW 31.3 36.6 41.8
l/s 0.17 0.18 0.17
°C 19.3 21.9 22.3
kPa 14 16 15
kPa 20.5 24 21
kW 31.3 36.6 41.8
l/s 0.17 0.18 0.17
°C 19.3 21.9 22.3
kPa 22 26 22
kPa 28 33 30,5
kW 44.0 51.3 58.6
l/s 0.23 0.25 0.24
°C 18.6 20.8 21.1
kPa 37.4 45.1 41.3
kPa 51 61.5 56.4
PT500
Ø 5.2 mm
1.5 m
5...130 °C
0.125 K
1/8 s; with D-cell
battery: 1 s
5...55 °C
-25...60 °C
3 K
177K
Resistance 
Temperature
°C
8186 30
5586 40
3889 50
Greenstar – 6721852556 (2022/11)
3)