Lewden HPPI-R06W-AC25 PRO 6 Way Heat Pump IP20 Consumer Unit with C25 Type B-HP RCBO, B6 & B20 RCBOs and SPD

Purpose-Built Heat Pump Consumer Unit with Enhanced Type B-HP Protection

The Lewden HPPI-R06W-AC25 is a purpose-configured PRO Series 6 way consumer unit for modern air source heat pump (ASHP) installations. It combines a specialist 25A Type B-HP Heat Pump RCBO, B6 and B20 Type A RCBOs, a 100A main switch and built-in Type 2 surge protection within a compact enclosure.

Importantly, current product information identifies the included heat pump RCBO as a C25 device, rather than B25. The HPPI-R06W-AC25 is therefore particularly suited to compatible inverter-driven heat pumps where the manufacturer and electrical design call for a 25A C Curve enhanced Type B-HP RCBO capable of dealing with higher-frequency residual currents.

Key Features

• Lewden PRO Series heat pump consumer unit
• Product code HPPI-R06W-AC25
• 6 usable ways
• 9-module enclosure
• Designed for air source heat pump installations
• 25A C Curve Type B-HP Heat Pump RCBO included
• 30mA residual-current protection
• B6 Type A RCBO included
• B20 Type A RCBO included
• 100A main switch
• Built-in Type 2 Surge Protection Device
• Designed for inverter-driven heat pump compressors
• Enhanced high-frequency residual-current protection
• Designed for frequencies up to 20kHz and above
• Minimum tripping point of 150mA above 1kHz
• Spare ways for additional heat pump circuits
• Compact PRO Series enclosure
• Round cable-entry knockouts
• Suitable for glands, conduit, grommets and SWA termination
• 230V rated
• Top-hinged door

25A C Curve Type B-HP Heat Pump RCBO Included

At the heart of the HPPI-R06W-AC25 is Lewden's specialist 25A Heat Pump RCBO.

Current technical information specifies this as a C25 Heat Pump RCBO, providing dedicated circuit protection for the main heat pump supply.

The device combines residual-current, overload and short-circuit protection, providing the functionality of an RCBO while incorporating Lewden's specialist B-HP residual-current characteristics for compatible heat pump applications.

This integrated approach also avoids the need for a separate Type B RCCB and MCB arrangement.

Enhanced Protection for Inverter-Driven Heat Pumps

Modern air source heat pumps commonly incorporate inverter-driven compressors and sophisticated power electronics. Depending on their design, these systems can produce residual currents at considerably higher frequencies than conventional electrical loads.

Lewden specifies the HPPI-R06W-AC25 for ASHP installations with inverter-driven compressors operating at frequencies up to 20kHz and above, with a minimum tripping point of 150mA above 1kHz.

This makes the unit particularly relevant where the heat pump manufacturer requires enhanced Type B residual-current performance.

B6 Type A RCBO for ASHP Controls

The consumer unit is supplied with a 6A B Curve Type A RCBO intended for the ASHP control circuit.

Using an individual RCBO gives the control circuit its own residual-current and overcurrent protection, providing a clearly organised circuit arrangement within the dedicated heat pump consumer unit.

B20 Type A RCBO for Immersion Heater

A 20A B Curve Type A RCBO is also included and is intended for an associated immersion heater final circuit.

Together with the C25 Heat Pump RCBO, this creates a practical pre-populated configuration covering the main heat pump, controls and immersion heater while retaining capacity for additional circuits.

Built-In Type 2 Surge Protection

The HPPI-R06W-AC25 includes a Type 2 Surge Protection Device (SPD) to help safeguard connected equipment against transient voltage spikes.

This is particularly beneficial for modern heat pump installations containing sensitive electronic controls, inverter technology and other power-electronic components.

With the SPD already incorporated into the enclosure, there is no need to provide a separate external surge-protection enclosure for this function.

100A Main Switch

The consumer unit incorporates a 100A main switch / isolator, providing convenient isolation of the complete dedicated heat pump distribution unit.

Lewden's design uses dual screw terminals to provide secure termination of the incoming tails.

Six Usable Ways

The HPPI-R06W-AC25 provides 6 usable ways, giving installers useful flexibility beyond the supplied C25, B6 and B20 protective devices.

Lewden identifies the spare ways as suitable for additional heat pump-related circuits, including integral heater circuits, where required by the particular system.

Additional devices must be correctly selected according to the connected equipment, cable design and manufacturer's instructions.

Compact PRO Series Enclosure

Despite the comprehensive pre-populated configuration, the HPPI-R06W-AC25 uses Lewden's compact PRO Series enclosure.

The unit provides 6 usable ways across a 9-module enclosure and measures approximately 268mm high x 208mm wide x 109mm deep.

This compact footprint makes it particularly useful where a dedicated heat pump consumer unit is required but wall space is limited.

Installer-Friendly Cable Entry

The enclosure incorporates round knockouts designed to simplify professional cable entry and termination.

These can accommodate:

• Round cable glands
• Conduit
• Cable grommets
• SWA cable termination

This gives installers flexibility when integrating the consumer unit into different heat pump wiring arrangements.

• Brand: Lewden
• Range: PRO Series Heat Pump Consumer Unit
• Product Code: HPPI-R06W-AC25
• Product Type: Air Source Heat Pump Consumer Unit
• Number of Usable Ways: 6
• Number of Modules: 9
• Incoming Device: 100A Main Switch / Isolator
• Heat Pump RCBO: Included
• Heat Pump RCBO Rating: 25A
• Heat Pump RCBO Curve: C Curve
• Heat Pump RCBO Type: Type B-HP / Enhanced Type B
• Heat Pump RCBO Residual Current: 30mA
• Additional RCBO 1: 6A B Curve Type A RCBO
• Additional RCBO 2: 20A B Curve Type A RCBO
• Surge Protection: Yes
• SPD Type: Type 2
• Voltage Rating: 230V
• High-Frequency Application: Up to 20kHz and Above
• Minimum Tripping Point Above 1kHz: 150mA
• Dimensions: 268mm (H) x 208mm (W) x 109mm (D)
• Door Type: Top Hinged
• Cable Entry: Round Knockouts
• Primary Application: ASHP / Heat Pump Electrical Distribution
• Guarantee: 1 Year

These configuration details are listed for the exact HPPI-R06W-AC25 by a current UK distributor.

Suitable Applications

• Air Source Heat Pumps
• ASHP Installations
• Inverter-Driven Heat Pumps
• Heat Pumps Requiring Enhanced Type B Protection
• Dedicated Heat Pump Supplies
• Heat Pump Control Circuits
• Immersion Heater Circuits
• Integral Heat Pump Heater Circuits
• Domestic Heat Pump Installations
• Commercial Heat Pump Installations
• Renewable Heating Systems
• Low-Carbon Heating Installations
• Heat Pump Retrofit Projects
• New-Build Heat Pump Installations

Why Choose the Lewden HPPI-R06W-AC25?

The Lewden HPPI-R06W-AC25 provides a ready-configured electrical distribution solution for heat pump installations requiring specialist high-frequency residual-current protection.

Its key feature is the included 25A C Curve Type B-HP Heat Pump RCBO, designed for compatible inverter-driven heat pumps where enhanced Type B protection is specified. This is complemented by dedicated B6 and B20 Type A RCBOs for the ASHP controls and immersion heater circuit.

A 100A main switch and Type 2 SPD complete the principal protection package, while the 6 usable ways provide spare capacity for additional heat pump circuits.

Housed within a compact 268 x 208 x 109mm PRO enclosure, the HPPI-R06W-AC25 offers a neat way to combine heat pump protection, associated circuit protection, isolation and surge protection in one dedicated consumer unit.