6 reasons to install SCALA2 correctly
The compact, self-priming and fully integrated pump
Source: grundfos.com
Correct installation of the Grundfos SCALA2 water pressure system is key to ensuring optimal performance, energy savings and a long service life. This article explains why it is essential to follow good installation practices and how to do so, based on the official SCALA2 guide.
Why is it important to install SCALA2 correctly?
SCALA2 is a compact, self-priming pump designed to increase water pressure in homes. Proper installation ensures:
Optimal performance: Avoids problems such as low pressure or irregular flows.
System protection: Prevents costly damage to the motor or impeller.
Energy efficiency: Maximizes savings with an Energy Efficiency Index (EEI) ≤0.23, according to Grundfos.
Safety and compliance: Complies with local plumbing regulations.
This article details the six main reasons to install SCALA2 correctly, a step-by-step guide, common mistakes to avoid, maintenance tips and answers to frequently asked questions.
The 6 main reasons to install SCALA2 correctly
1. Optimal performance
Incorrect installation can cause low water pressure or irregular flows, affecting the experience of faucets, showers or appliances. SCALA2 can provide up to 3 m³/h of flow and constant pressure in homes up to 3 floors and 8 faucets. If the pipes are not properly connected or there is air in the system, the pressure may be insufficient, reducing comfort. Following the official instructions ensures optimal performance and a smooth user experience.
2. Damage prevention
Poor installation can cause cavitation, a phenomenon where air bubbles form in the water due to low pressure. When these bubbles collapse, they erode the impeller and motor, causing damage that can require costly repairs or pump replacement. Proper installation, with a properly primed pump and properly sized piping, prevents cavitation and extends the life of the system.
3. Energy efficiency
SCALA2 stands out for its energy efficiency, with an EEI ≤0.23, thanks to the permanent magnet motor and variable speed control. These technologies allow the pump to adjust consumption according to demand, reducing electricity bills. An inadequate installation, such as a poorly leveled pump or faulty connections, can cause SCALA2 to work harder than necessary, increasing energy consumption and decreasing efficiency.
4. Preventing leaks and water damage
SCALA2 mechanical seals are designed to prevent leaks, but poor installation can compromise this safety. Leaks waste water and can cause structural damage, such as damp or flooding. For example, a poorly adjusted connection can cause water leaks that affect floors or walls. Using approved flexible hoses and ensuring that connections are well sealed is essential to prevent these problems.
5. Compliance with regulations
Each region has specific plumbing codes that must be followed to avoid penalties or legal issues. SCALA2 must meet requirements such as electrical safety and drinking water quality. For example, electrical connections must be made by a licensed electrician, and the pump must be installed according to local regulations. The official documentation details these requirements to ensure a safe and compliant installation.
6. Constant water pressure
Stable pressure is vital for the proper functioning of appliances and installations such as washing machines, dishwashers or pressure showers. SCALA2 automatically adjusts the motor speed according to demand, maintaining a constant pressure even when several taps are open. Incorrect installation can cause pressure fluctuations, affecting performance and comfort. Following good practices ensures an optimal user experience.
How to achieve maximum performance and efficiency in SCALA2
Want to optimize the performance and efficiency of your SCALA2? Simply pre-charge the pressure in the integrated pressure tank in three easy steps.
Watch our short video to see how it’s done.
How to install SCALA2 correctly
How to install SCALA2 correctlyThis guide is based on official Grundfos documentation. Always refer to the manual and consider a professional for complex tasks.
Preparation
Review the documentation
Get familiar with the technical specifications of the SCALA2, such as a maximum flow rate of 3 m³/h, pressure of up to 45 m and electrical requirements of 200-240 V. Download the manual here.Choose a suitable location
SCALA2 is IPX4 rated, allowing for indoor or outdoor installations. Avoid direct exposure to sunlight or rain if outdoors. Make sure there is space for maintenance and a nearby drain for possible initial leaks.Check the power supply
Verify that the voltage and frequency match the manual. Electrical connections must be made by a licensed electrician.Prepare the tools
You will need wrenches, pliers, Teflon tape (if there are no flat joints) and a voltage tester. Do not use wrenches to tighten connections, as you may damage the housing.Gather the materials
Includes pipes, fittings, valves and flexible hoses approved for drinking water.
SCALA2 pump installation
The SCALA2 is a smart pressure pump for domestic use that offers a constant supply of water with quiet and efficient operation. This guide covers all the steps necessary for a correct, safe and durable installation.
1. Disconnect the power supply
Before starting the installation, it is essential to disconnect the electrical supply to the area where the pump will be installed. This avoids possible accidents or electrical risks during assembly.
2. Install the pump
Install the SCALA2 securely in the chosen location, ensuring that it is level and stable. It is recommended to place it on an anti-vibration rubber base to reduce noise and vibration during operation. This measure also helps to protect the pump and extend its service life.
3. Connect the pipes
Pump connections should be hand-tightened only. Do not use tools such as wrenches, as this may cause excessive stress on the pump housing, which may crack it and void the warranty.
Install the necessary pipes, fittings and valves to ensure proper water circulation within the system. Both the suction and discharge connections can be adjusted ±5° to facilitate connection.
If the length of the suction pipe exceeds 10 metres or if the suction height is greater than 4 metres, the diameter must be greater than 2.5 cm (1″). This ensures proper operation and prevents pressure drops.
The discharge side connection must be connected to a straight horizontal pipe. Using a straight section before any bend helps to reduce friction losses and stabilizes the flow. All pipes must be securely fixed to avoid unnecessary vibrations and stresses.
To transport drinking water safely, it is recommended to use flexible hoses approved by Grundfos. These hoses comply with the Water Regulation Advisory Scheme (WRAS) for use with cold and hot water, and are resistant to kinking, abrasion and crushing.
Use Teflon tape or suitable sealants on threaded connections to prevent leaks. Do not apply sealing tape to connections with flat gasket, as is the case with Grundfos flexible hoses.
Consult the SCALA2 technical catalog for general precautions applicable to suction and discharge pipes.
4. Check connections
Once all the pipes are connected, check that the joints between the pump, pipes and valves are tight and secure. A pressure gauge can be used to check the pressure and detect possible leaks or irregularities in the system.
5. Prime the pump
Once all the pipes are connected, check that the joints between the pump, pipes and valves are tight and secure. A pressure gauge can be used to check the pressure and detect possible leaks or irregularities in the system.
6. Start and check the pump
Reconnect the power supply and check the operation of the pump. Start-up should be done with the highest consumption point of the system open to eliminate air from the circuit and allow the pump to fill with water.
Check for abnormal noises, vibrations or leaks. It is important to monitor the system to ensure that it operates within the desired parameters.
It is normal for the mechanical seal to leak slightly during the first start-up, until its contact surfaces are fully lubricated. For this reason, it is recommended to install the pump near a drain or in a collection tray connected to a drain (as indicated in step 2).
7. Adjust the tank precharge pressure
Adjust the pre-charge pressure to 70% of the setpoint, but never above this threshold. For more specific information on this adjustment, see the label on the top of the pump or access the practical guide provided by Grundfos.
Common mistakes to avoid
Stressing the pump with pipes: The pipes must not exert pressure on the pump, as this can damage it.
Exposure to the weather: Protect SCALA2 from sun and rain if it is outside.
Poorly submerged suction pipe: It must be at least 0.5 m submerged to avoid dry runs.
Improper electrical connections: Hire an authorized electrician.
Careless handling: Avoid dropping the pump, as it may break.
SCALA2 maintenance
To keep your SCALA2 in good condition, check the air pressure in the tank annually (approximately 25 psi). Check for leaks or abnormal noises. If you detect any problems, consult the manual or contact Grundfos technical service. Some users have reported problems such as leaking mechanical seals, but these are usually covered by the warranty if installed correctly.
Frequently Asked Questions (FAQ)
Can I install SCALA2 myself?
Yes, following the manual, but electrical connections require a professional.
What is the SCALA2 warranty?
- The warranty is 24 months from installation or 30 months from manufacture, whichever comes first. Please check with your local dealer (Grundfos Warranty).
What maintenance does SCALA2 need?
Check the tank pressure annually and make sure there are no leaks.
What to do if SCALA2 fails?
Check the control panel. If the light is red or yellow, restart the pump. If it persists, contact a professional.
How do I know if I need a pressure booster?
If you have low pressure when several taps are open, SCALA2 may be the solution.
Additional resources
This free 15-minute online course introduces the applications and benefits of the SCALA2 system, including the concept of perfect water pressure.