Performance Curves; Guide To Performance Curves; Curve Conditions - Grundfos ALPHA1 Manual De Instrucciones

14. Performance curves

14.1 Guide to performance curves

Each pump setting has its own performance curve (Q/H curve).
A power curve (P1 curve) belongs to each Q/H curve. The power curve shows the pump power consumption (P1) in Watt at a given Q/H
curve.
The P1 value corresponds to the value that can be read from the pump display. See fig. 18:
Fig. 18 Performance curves in relation to pump setting
Setting Pump curve
PP1 Lowest proportional-pressure curve
PP2
Highest proportional-pressure curve
(factory setting)
CP1 Lowest constant-pressure curve
CP2 Highest constant-pressure curve
III Constant speed, speed III
II Constant speed, speed II
I Constant speed, speed I
For further information about pump settings, see sections
7.4 Light fields indicating the pump setting
8. Setting the pump
11. Pump settings and pump performance.
POWER AUTO
ADAPT
H
P 1
ON
PP1 CP1
PP2 CP2
II
I
II
I

14.2 Curve conditions

The guidelines below apply to the performance curves on the
following pages:
• Test liquid: airless water.
The curves apply to a density of ρ = 983.2 kg/m
•
temperature of +60 °C.
• All curves show average values and should not be used as
guarantee curves. If a specific minimum performance is
required, individual measurements must be made.
• The curves for speeds I, II and III are marked.
• The curves apply to a kinematic viscosity of υ = 0.474 mm
(0.474 cSt).
III
Q
III
Q
3
and a liquid
2
/s
27