Grundfos ALPHA1 Series User Manual

13
English (US)
8.5 Pump performance and operating mode selection
The hydraulic performance shown is without check valve.
TM06 8910 1417
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Q [US GPM]
0
2
4
6
8
10
12
14
16
18
20
[ft]
H
0
1
2
3
4
5
6
[m]
H
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Q [m³/h]
Constant Pressure III
Constant Pressure II
Constant Pressure I
17 18
Pos. Description
• Push-button for selection of pump setting
• Every time you press the push-button, the circulator setting is changed.
III
Constant pressure III
• The duty point of the pump will move left and right along the highest constant-pressure
curve depending on the water demand in the system.
II
Constant pressure II
• The duty point of the pump will move left and right along the middle constant-pressure
curve depending on the water demand in the system.
I
Constant pressure I
• The duty point of the pump will move left and right along the lowest constant-pressure
curve depending on the water demand in the system.

Grundfos ALPHA1 Series Specifications

General

Series	ALPHA1
Voltage	230 V
Temperature Range	2°C to 110°C
Max Operating Pressure	10 bar
Enclosure Class	IP42
Insulation Class	F
Type	Circulation Pump
Frequency	50 Hz
EEI (Energy Efficiency Index)	0.20
Material	Cast iron
Connection Size	1"