Grundfos ALPHA2 User Manual

6
3. Applications
Contents:
3.1 System types
3.2 Pumped liquids
3.3 System pressure
3.4 Relative air humidity (RH)
3.5 Enclosure class
3.6 Inlet pressure.
3.1 System types
Fig. 2 Pumped liquids and operating conditions
GRUNDFOS ALPHA2 is suitable for
• systems with constant or variable flows where it is desirable to
optimise the setting of the pump duty point
• systems with variable flow-pipe temperature
• systems where night setback is desired.
3.2 Pumped liquids
Clean, thin, non-aggressive and non-explosive liquids, not containing
solid particles, fibres or mineral oil. See fig. 2.
In heating systems, the water should meet the requirements of accepted
standards on water quality in heating systems, e.g. the German standard
VDI 2035.
In domestic hot-water systems, it is advisable to use GRUNDFOS
ALPHA2 pumps only for water with a degree of hardness lower than
approx. 14 °dH. For water with a higher degree of hardness, a direct-
coupled TPE pump is recommended.
TM03 8921 2707
Warning
The pump must not be used for the transfer of flammable liquids
such as diesel oil, petrol and similar liquids.

Grundfos ALPHA2 Specifications

General

Max Head	8 m
Voltage	230 V
Frequency	50/60 Hz
Type	Circulator Pump
Max. operating pressure	10 bar
Series	ALPHA2
Connection Type	Threaded
Protection Class	IP42
Liquid Temperature Range	2°C to 110°C
Energy Efficiency Index	≤ 0.23
Connection size	G 1 1/2
EEI	≤ 0.23