Brochure & Sedification SheetsThe Grundfos ALPHA2 is a medium sized high-efficiency, variable speed circulator fitted with electronically commutated motor. Designed for circulating liquids in heating systems.
It features a constant pressure control mode and a proportional pressure control mode each with three settings, and constant pressure and proportional pressure AUTOADAPT. The constant and proportional pressure AUTOADAPT mode enables the pump to continuously adjust the pump performance to the actual heat demand, i.e. the size of the system and the changing heat demands during the year. The function will find the setting that provides optimal comfort with minimal energy consumption. It contributes to fast, safe and easy commissioning.
The one-button operation and LED display makes the selection of the settings easy.
ALPHA2 materials and design are resistant to blockage from magnetite found in hydronic systems.
ALPHA2 is complete with an integrated check-valve.
It is fitted with a terminal box for conduit connections.
| Product name |
ALPHA2 26-99F |
| Product No. |
99490916 |
| EAN |
5713829959309 |
Technical
| Head max |
32.48 ft |
| TF class |
110 |
| Approvals on nameplate |
UL |
Materials
| Pump housing |
Cast iron |
|
EN 1561 EN-GJL-150 |
| Impeller |
Composite |
Installation
| Range of ambient temperature |
32 .. 131 °F |
| Maximum operating pressure |
145.04 psi |
| Type of connection |
GF |
| Pipe connection |
1 1/4 |
| Pressure stage |
PN 10 |
| Port-to-port length |
6 1/2 in |
Liquid
| Pumped liquid |
Water |
| Liquid temperature range |
14 .. 203 °F |
| Selected liquid temperature |
140 °F |
| Density |
61.35 lb/ft³ |
Electrical data
| Power input - P1 |
3 .. 120 W |
| Main frequency |
60 Hz |
| Rated voltage |
1 x 115 V |
| Maximum current consumption |
0.05 .. 1.7 A |
| Enclosure class (IEC 34-5) |
IP42 |
| Insulation class (IEC 85) |
F |
| Built-in motor protection |
NONE |
| Thermal protec |
ELEC |
Others
| Net weight |
7.71 lb |
| Gross weight |
8.47 lb |
| Shipping volume |
0.28 ft³ |
| Sales region |
USA |
