Which circuits need to be supplied?

A heat pump installation may include a compressor, controls, circulation equipment and supplementary electric heating. Those loads are not necessarily supplied from one protective device. Write down the manufacturer’s required circuit arrangement before choosing a pre-assembled board.

The available WCED configurations differ. A board with two outgoing circuits is not automatically suitable for a system requiring a separate immersion-heater supply. Compare the actual component list and the selected variant.

Does every heat pump need the same Type B RCD?

No. Obtain the specific equipment’s residual-current requirements. Inverter-driven equipment can create residual-current characteristics that affect RCD selection, including frequency response. Do not infer the required RCD from “air source heat pump” alone.

A high-frequency Type B option is a particular specification, not a universal upgrade for every heat pump. Ask for the model datasheet and compare it with the equipment manufacturer’s requirements. Type B RCD and B-curve MCB describe different functions.

What do the board components do?

A fitted board reduces component sourcing, but still needs correct installation, verification and commissioning. It does not make every connected heat pump compatible.

Compare the listed WCED configurations

The standard heat pump unit offers three outgoing-device configurations. The high-frequency unit offers 16A and 25A selections and describes separate control and immersion supplies. Open the variant links below and confirm the complete component schedule before ordering.

Check mounting location as well as electrical ratings. An indoor enclosure must not be assumed suitable beside an outdoor heat-pump unit. Obtain dimensions, entry positions and the enclosure rating for the exact assembly.

Send this information with a product enquiry

• Heat pump make, model and installation manual.
• Single-phase or three-phase supply.
• Maximum input current and specified protective devices.
• RCD type and any frequency-response requirement.
• Control, immersion and backup-heater circuit requirements.
• Proposed board location and available mounting space.

If an EV charger or other major load shares the property, ask the designer to check total demand and supply capacity. A larger board does not increase the supply.

WCED models and exact product options

Choose a configuration below to open that option on the product page. Check the selected specification, current price and availability before adding it to your basket.

Common buying questions