Grundfos ALPHA1 L Series User Manual

English (GB)
22
10.2 Dimensions, ALPHA1 L 25-65
Fig. 26 ALPHA1 L 25-65
11. Performance curves
11.1 Guide to performance curves
Each pump has its own performance curve.
A power curve, P1, belongs to each performance curve. The
power curve shows the pump power consumption in watt at a
given performance.
11.2 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  = 983.2 kg/m
3
and a liquid
temperature of 60 °C.
• All curves show average values and must 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
 = 0.474 mm
2
/s
(0.474 cSt).
• The EEI values obtained according to EN 16297 part 3.
TM07 1316 1218
H2H1
H4
H3
B4
L3
B2B1
B3
G
L4
L
Pump type
Dimensions [mm]
L L3 L4B1B2B3B4H1H2H3H4 G
ALPHA1 L 25-65 130 89 45 54 54 72 47 25 102 47 149 G 1 1/2

Grundfos ALPHA1 L Series Specifications

General

Pump Type	Circulator
Series	ALPHA1 L
Max Head	6 m
Voltage	230 V
Frequency	50/60 Hz
Liquid Temperature Range	2°C to 110°C
Max Operating Pressure	10 bar
Insulation Class	F
Enclosure Class	IP42
Application	Heating systems
Control Modes	Proportional pressure, constant pressure
EEI	0.20
Material	Cast iron
Power Input	Varies by model (e.g., ALPHA1 L 25-40 180: 3-22 W)
Pipe Connection	G 1 1/2