Brochure & Specification SheetsThe Grundfos ALPHA 1 is a high-efficiency, variable speed circulator fitted with electronically commutated motor. Designed for hot water recirculation systems.
It features a constant pressure control mode with three settings. The intuitive one-button operation and LED display makes the selection of the settings easy. The large LED display shows the current energy consumption in Watts and estimated flow in gallons per minute.
ALPHA1 materials and design are resistant to blockage from magnetite found in hydronic systems.
The robust startup enables ALPHA1 to continuously attempt to restart – indefinitely – in blocked rotor conditions.
ALPHA1 is complete with an integrated check-valve, and nut captures for flanges.
For power connection two options are available with either line cord or terminal box for conduit connections.
| Product name |
ALPHA1 15-55SF/LC |
| Product No. |
99287250 |
| EAN |
5713826610241 |
Technical
| Head max |
18.05 ft |
| TF class |
110 |
| Approvals on nameplate |
ETL, FCC, NSF |
Materials
| Pump housing |
Stainless steel |
|
EN 1.4308 |
| Impeller |
Composite |
Installation
| Range of ambient temperature |
32 .. 104 °F |
| Maximum operating pressure |
145.04 psi |
| Type of connection |
GF |
| Pipe connection |
1 1/2 |
| Pressure stage |
PN 10 |
| Port-to-port length |
6 1/2 in |
Liquid
| Pumped liquid |
Water |
| Liquid temperature range |
35.6 .. 230 °F |
| Selected liquid temperature |
140 °F |
| Density |
61.35 lb/ft³ |
Electrical data
| Power input - P1 |
5 .. 45 W |
| Main frequency |
60 Hz |
| Rated voltage |
1 x 115 V |
| Maximum current consumption |
0.1 .. 0.65 A |
| Enclosure class (IEC 34-5) |
IP42 |
| Insulation class (IEC 85) |
F |
| Built-in motor protection |
NONE |
| Thermal protec |
ELEC |
Others
| Net weight |
5.75 lb |
| Gross weight |
6.51 lb |
| Shipping volume |
0.28 ft³ |
| Sales region |
USA |
