Grundfos ALPHA2 L Installation And Operating Instructions Manual
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Grundfos ALPHA2 L Installation And Operating Instructions Manual

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GRUNDFOS INSTRUCTIONS
ALPHA2 L
Model C
Installation and operating instructions

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Summary of Contents for Grundfos ALPHA2 L

  • Page 1 GRUNDFOS INSTRUCTIONS ALPHA2 L Model C Installation and operating instructions...

  • Page 2: Table Of Contents

    Technical data Data and operating conditions Dimensions Performance curves 10.1 Guide to performance curves 10.2 Curve conditions 10.3 Performance curves, ALPHA2 L, XX-40 10.4 Performance curves, ALPHA2 L, XX-60 Accessories 11.1 Unions 11.2 Insulating shells 11.3 ALPHA plugs Disposing of the product...

  • Page 3: Notes

    1.3 Notes 3. Installing the product The symbols and notes below may appear in Grundfos 3.1 Mechanical installation installation and operating instructions, safety instructions and service instructions. 3.1.1 Mounting the product Observe these instructions for explosion-proof products. A blue or grey circle with a white graphical symbol indicates that an action must be taken.

  • Page 4: Positioning The Pump

    3.2 Positioning the pump 3.3.3 Changing the control box position WARNING Pressurised system Minor or moderate personal injury - Before dismantling the pump, drain the system or close the isolating valves on either side of the pump. The pumped liquid may be scalding hot and under high pressure.

  • Page 5: Electrical Installation

    4. Electrical installation 4.1 Assembling the plug WARNING Step Action Illustration Electric shock 7 mm Death or serious personal injury Fit the cable gland - Switch off the power supply before starting any and plug cover to work on the product. Make sure that the power 12 mm the cable.

  • Page 6: Dismantling The Plug

    4.2 Dismantling the plug 5. Starting up the product 5.1 Before startup Step Action Illustration Do not start the pump until the system has been filled with liquid and vented. Make sure that the required minimum inlet pressure is available at the pump inlet. See section 9.

  • Page 7: Venting The Pump

    7. Control functions. 6.1.1 Model type These installation and operating instructions cover ALPHA2 L. The pump must not run dry. The model type is stated on the packaging and nameplate. See figs 10. You cannot vent the system through the pump. See section 6.

  • Page 8: Applications

    Maximum input power P1 [W] WARNING Biological hazard 6.4.2 Type key Death or serious personal injury Example: ALPHA2 L 25 - 60 180 - In domestic hot-water systems, the temperature of Code Explanation the pumped liquid must always be according to local legislation.

  • Page 9: Control Functions

    7. Control functions 7.3 Light fields indicating the pump setting The pump has different performance settings which you can 7.1 Elements on the operating panel select between with the button. See fig. (2). Every time you press the button , the pump setting is changed. The pump setting is indicated by light fields in the display.

  • Page 10: Control Modes

    7.4 Control modes 7.4.2 Pump setting for one-pipe heating systems 7.4.1 Pump setting for two-pipe heating systems Fig. 16 Selection of pump setting for system type Fig. 14 Selection of pump setting for system type Recommended and alternative pump settings according to fig. Recommended and alternative pump settings according to fig.
  • Page 11 7.4.3 Pump setting for underfloor heating systems Fig. 18 Selection of pump setting for system type Recommended and alternative pump settings according to fig. Pump setting System type Recommended Alternative Underfloor Constant-pressure Constant curve/constant heating curve, CP1 or CP2 * speed, I, II or III * See section 10.1 Guide to performance...

  • Page 12: Pump Performance

    7.5 Pump performance Relation between pump setting and pump performance. Figure shows the relation between pump setting and pump performance by means of curves. See also section 10. Performance curves. Fig. 20 Pump setting in relation to pump performance Setting Pump curve Function Lowest...

  • Page 13: Fault Finding The Product

    8. Fault finding the product WARNING Electric shock Death or serious personal injury - Switch off the power supply before starting any work on the product. Make sure that the power supply cannot be accidentally switched on. WARNING Pressurised system Minor or moderate personal injury - Before dismantling the pump, drain the system or close the isolating valves on either side of the...

  • Page 14: Technical Data

    9. Technical data 9.1 Data and operating conditions Supply voltage 1 x 230 V ± 10 %, 50 or 60 Hz, PE Motor protection The pump requires no external motor protection. Enclosure class IPX4D Insulation class Relative humidity Maximum 95 % RH System pressure Maximum 1.0 MPa, 10 bar, 102 m head Liquid temperature...

  • Page 15: Dimensions

    9.2 Dimensions Dimensional sketches and table of dimensions. Fig. 21 ALPHA2 L Dimensions Pump type ALPHA1 25-40 G1 1/2 ALPHA1 25-60 G1 1/2 ALPHA1 25-60 G1 1/2 ALPHA1 32-40 ALPHA1 32-60...

  • Page 16: Performance Curves

    10. Performance curves 10.1 Guide to performance curves Each pump setting has its own performance curve. A power curve, P1, belongs to each performance curve. The power curve shows the pump power consumption in watt at a given performance curve. The P1 value corresponds to the value that you can read from the pump display.

  • Page 17: Performance Curves, Alpha2 L

    10.3 Performance curves, ALPHA2 L, XX-40 Q [m³/h] Q [m³/h] Fig. 23 ALPHA2 L, XX-40 Setting Min. 0.04 Max. 0.18...
  • Page 18 10.4 Performance curves, ALPHA2 L, XX-60 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 Q [m³/h] 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 Q [m³/h]...

  • Page 19: Accessories

    11. Accessories 11.1 Unions Product numbers, unions Ball valve with Union nut with internal Union nut with Ball valve with internal compression Union nut with soldering fitting threads external threads threads fitting ∅22 ∅28 ∅18 ∅22 ∅28 ∅42 1 1/4 1 1/4 1 1/4 25-xx...

  • Page 20: Insulating Shells

    98091787 environmentally sound way: 1. Use the public or private waste collection service. 2. If this is not possible, contact the nearest Grundfos company or service workshop. The crossed-out wheelie bin symbol on a product means that it must be disposed of separately from household waste.
  • Page 21 Tel. +359 2 49 22 200 Fax. +359 2 49 22 201 email: bulgaria@grundfos.bg Romania Grundfos Pompe România SRL S-PARK BUSINESS CENTER, Clădirea etaj 2, Str. Tipografilor, Nr. 11-15, Sector 1, Cod 013714, Bucuresti, Romania, Tel: 004 021 2004 100 E-mail: romania@grundfos.ro...
  • Page 22 99977511 03.2021 ECM: 1309945 www.grundfos.com...

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