Grundfos ALPHA1 15-40, Installation And Operating Instructions Manual

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English (GB)
27
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
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
.
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
3
and a liquid
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
2
/s
(0.474 cSt).
TM
04 253
4 260
8
AUTO
ADAPT
III
II
I
PP1
PP2
CP1
CP2
Q
P 1
H
Q
III
II
I
ON
POWER
Setting Pump curve
PP1 Lowest proportional-pressure curve
PP2
(factory setting)
Highest proportional-pressure curve
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