Available Hydraulic Pressure; Central Heating Circulation Pump Characteristics - Bosch Worcester Greenstar HIU E Installation And Maintenance Instructions Manual

Commissioning
Operational status indication
When the circulation pump is running, LED1 is green. The four yellow
LEDs indicate the current power consumption (P1) as shown in
table 13. When the operation mode is active, all active LEDs are
constantly on in order to differentiate this mode. If the circulation pump
is stopped by an external signal, LED 1 flashes green.
Display Indication
One green LED Standby (only external
(flashing) controlled)
One green LED + Low performance
one yellow LED
One green LED + Medium low
two yellow LEDs performance
One green LED + Medium high
three yellow LEDs performance
One green LED + High performance
four yellow LEDs
Table 13 Operational status indication
6.6.3

Available hydraulic pressure

The residual hydraulic head available from the heat interface unit is
shown in figure 48 for all proportional pressure settings.
p
[mbar]
400
350
300
250
2
200
150
1
100
50
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Fig. 48 Available hydraulic pressure
[1] PP1: lowest proportional pressure curve.
[2] PP2: intermediate proportional pressure curve.
[3] PP3: highest proportional pressure curve.
The default setting is PP3: highest proportional pressure curve.
34
Performance in % of
P1 maximum
0
0 - 25
25 - 50
50 - 75
75 - 100
3
6720808928-58.1Wo
[l/min]
6.6.4

Central heating circulation pump Characteristics

Modulating speed characteristics
p H
[kPa] [m]
7
60
6
50
5
40
4
30
3
20
2
10 1
0 0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
0.0 0.1 0.2 0.3 0.4
P1
[W]
50
40
30
20
10
0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
Fig. 49 Modulating speed characteristics
[P] Head (kPA)
[H] Head (m)
[Q] Flowrate, (m3/h or l/s)
[P1] Power (W)
• PP1: lowest proportional pressure curve.
• PP2: intermediate proportional pressure curve.
• PP3: highest proportional pressure curve. (default setting)
Setting Maximum head (nominal)
Curve 1 4 m
Curve 2 5 m
Curve 3 6 m
Table 14 Modulating speed characteristics
The head (pressure) is reduced at falling heat demand and increased at
rising heat demand.
Q [m
3
0.5 0.6 0.7 0.8 0.9 1.0 Q [l/s]
Q [m
3
6720808928-23.1Wo
Maximum P1(nominal)
25 W
33 W
39 W
6 720 808 928 (2017/06)
/h]
/h]