The model C pump, designed from scratch, can be operated and installed in all types of heating installations, where the flow rate is constant or variable. The pump has an electronically commutated ECM motor that has very high efficiency. This allows the pump to automatic adjustment of operating parameters to the installation in which it will be mounted. The pump can operate at different speeds when it is controlled by a low voltage PWM signal (modulated pulse width).
| Technical Data | |
| Power supply voltage | 1 x 230 50/60 Hz PE |
| Motor protection | The pump does not require external motor protection |
| Level of securitys | IPX4D |
| Relative air humidity | max 95 % |
| Insulation class | F |
| EEI | <0,20 |

| Pump type | L1 | L3 | L4 | B1 | B2 | H1 | H2 | H3 | G | Weight netto | Weight brutto |
| ALPHA1 L 25-40 180 | 180 | 88,3 | 71,6 | 46,3 | 46,4 | 25,3 | 102,1 | 127,4 | 1 1/2" | 1,9 | 2,1 |

| Weight [ kg ] | 2.1 |
| Height [ mm ] | 180 |
| Width [ mm ] | 93 |
| Depth [ mm ] | 127.400 |
| Thread type | External thread (GZ) |
| Outlet and inlet supply size [ inch ] | 6⁄4'' |
| Installation | Horizantal, Vertical, Internal |
| Max. working temperature [ 掳C ] | 95 |
| Min. working temperature [ 掳C ] | 2 |
| Max. operating pressure [ bar ] | 10 |
| Mains voltage [ V ] | 230 |
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