In the face of growing requirements for environmental protection and skyrocketing energy prices, replacing old, inefficient installation pumps is becoming a necessity. A universal replacement for worn-out, energy-consuming and damaged pumps in radiator installations, underfloor heating and boilers is the ALPHA1 L pump from Grundfos .
Universal pump for retrofitting and replacement
ALPHA1 L is the ideal choice when replacing an old or damaged circulation pump . Thanks to its compact design, the ability to be controlled using a PWM signal and operation at higher ambient temperatures, it is suitable for most heating installations with variable or constant flow rates . The universal design of the pump allows it to be installed in 95% of boilers equipped with Grundfos pumps, regardless of the brand of the boiler and without the need for additional equipment.
Grundfos GO Replace – a convenient way to find a replacement for your old pump
The intuitive Grundfos GO Replace application allows you to quickly find a replacement and replace your old circulation pump. Just take a photo or enter the catalog number of the pump to be replaced, and the application will indicate the best solution and preferred operating mode, calculate electricity savings, provide information on installation and connection, and generate a report containing the proposed replacement, its settings and information on estimated energy consumption. during the heating season.
Application of the ALPHA1 L pump
ALPHA1 L pumps are suitable for installations with constant or variable flow , where it is desired to optimize the pump operating point, and for installations with variable heating medium temperature.
ALPHA1 L pumps are particularly suitable for:
- installation in existing installations where the pressure difference across the pump is too high during periods of reduced demand,
- installation in new installations to ensure that the pump automatically adapts to demand without the use of bypass valves or similar expensive devices.
Check out the offer of Alpha1 L pumps at the Onninen wholesaler
Advantages of pump regulation
The heat demand of heated buildings varies with the time of day and may be different in different parts of the building. They are also influenced by individual changes to the settings of thermostatic radiator valves made by users. In such conditions , the pressure difference produced by the unregulated pump is too high when the heat demand is low . The result may be high energy consumption and uncontrolled operation of the installation.
The ALPHA1 L pump automatically regulates the pressure difference by adapting its operation to the actual heat demand without using additional devices. The ALPHA1 L pump is controlled by adjusting the pressure difference to the flow (proportional pressure and constant pressure control). Unlike uncontrolled pumps, the ALPHA1 L pump, operating in proportional pressure control mode, reduces the differential pressure in response to decreasing heat demand.
In an installation with an unregulated pump, an increase in pressure is often associated with the generation of noise by thermostatic radiator valves. The use of the ALPHA1 L pump significantly reduces this phenomenon.
The pump offers 3 regulation modes :
- heating system regulation mode,
- underfloor heating system regulation mode,
- constant speed control mode.
Convenient control and setting
ALPHA1 L is equipped with a clear control panel that allows you to quickly and easily set the pump operating mode . Using the button on the panel, you can select one of three constant-speed characteristics, radiator and floor installation control modes, or PWM signal control. Clear LED indicators on the panel indicate pump mode and status and display alarms.
Pump installation
In most cases, the installation of the ALPHA1 L pump is limited to mechanically installing the pump and connecting the power supply. The pump control box can be mounted in any position. The box is equipped with two electrical connections on one side: a supply voltage connection and a PWM signal connection. ALPHA1 L does not require bleeding before starting . Electrical power is connected to the pump via a hermetic plug included with each pump.
Technical data
- Supply voltage: 1 x 230V 50/60 Hz
- Qmax efficiency: 3.6 m 3 /h
- Lifting height Hmax: 6.5 m
- Installation pressure: PN 10
- Power consumption: 4-60W
- Sound pressure level : ≤ 43 dB(A)
- Temp. liquid: +2°C to +95°C
- Ambient temperature: 0°C to 55°C
- Degree of protection: IPX4D
- Insulation class: F
Check out the offer of Alpha1 L pumps at the Onninen wholesaler