Grundfos ALPHA2 15-50 130, Инструкция по установке и эксплуатации

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English (GB)
16
12. Pump settings and pump performance
12.1 Relation between pump setting and pump performance
Figure 15 shows the relation between pump setting and pump performance by means of curves. See also section
15. Performance
curves
.
Fig. 15 Pump setting in relation to pump performance
T
M
03
92
08
36
07
Setting Pump curve Function
AUTO
ADAPT
(factory setting)
Highest to lowest
proportional-pressure
curve
The AUTO
ADAPT
function enables ALPHA2 to control the pump performance automatically
within a defined performance range. See fig. 15:
• Adjusting the pump performance to the size of the system.
• Adjusting the pump performance to the variations in load over time.
In AUTO
ADAPT
, the pump is set to proportional-pressure control.
PP1
Lowest proportional-
pressure curve
The duty point of the pump will move up or down on the lowest proportional-pressure curve,
depending on the heat demand in the system. See fig. 15.
The head (pressure) is reduced at falling heat demand and increased at rising heat demand.
PP2
Highest proportional-
pressure curve
The duty point of the pump will move up or down on the highest proportional-pressure curve,
depending on the heat demand in the system. See fig. 15.
The head (pressure) is reduced at falling heat demand and increased at rising heat demand.
CP1
Lowest constant-
pressure curve
The duty point of the pump will move out or in on the lowest constant-pressure curve,
depending on the heat demand in the system. See fig. 15.
The head (pressure) is kept constant, irrespective of the heat demand.
CP2
Highest constant-
pressure curve
The duty point of the pump will move out or in on the highest constant-pressure curve,
depending on the heat demand in the system. See fig. 15.
The head (pressure) is kept constant, irrespective of the heat demand.
III Speed III
The pump runs at a constant speed and consequently on a constant curve.
In speed III, the pump is set to run on the maximum curve under all operating conditions.
See fig. 15.
Quick venting of the pump can be obtained by setting the pump to speed III for a short period.
See section
11.2 Venting the pump
.
II Speed II
The pump runs at a constant speed and consequently on a constant curve.
In speed II, the pump is set to run on the intermediate curve under all operating conditions.
See fig. 15.
I Speed I
The pump runs at a constant speed and consequently on a constant curve.
In speed I, the pump is set to run on the minimum curve under all operating conditions.
See fig. 15.
The pump changes to the curve for Automatic Night SetBack, i.e. absolute minimum
performance and power consumption, provided certain conditions are met. See section
9. Automatic Night SetBack
.
III
II
I
AUTO
ADAPT
AUTO
ADAPT
PP1
PP2
CP1
CP2
H
Q