DeltaTherm® HC MAX - A2W

The Resol DeltaTherm HC MAX is a next-generation hydronic heating and cooling controller designed with a powerful, intuitive human-interface platform. Engineered for versatility, it supports up to four independent hydronic heating/cooling circuits and comes equipped with 15 sensor inputs, two Grundfos VFS analog inputs, and two digital inputs. With 13 semiconductor relay outputs and an additional dry-contact output, it delivers robust, flexible control for even the most demanding radiant systems.

Because it’s a true human-interface controller, there’s no need to learn specialized program languages—saving you time, training costs, and installation complexity. The HCMAX puts advanced system logic at your fingertips, making professional-grade control accessible and efficient from day one.

Controlling of the Heating & cooling source(s), heating & cooling mixing, condensation prevention and zones -all in one controller!!

The DeltaTherm® HC MAX controller is  c LCus  certified and meets the demands of the UL 60730-1:2009 and CSA B60730.1:2002 standards.

Resol DeltaSol HC MAX  Controller Data Sheet     Resol DeltaTherm HC MAX  User Manual    

What is included in the package? 

Unlock the full potential of your heating system with our complete Resol DeltaTherm HC MAX controller kit. This premium package includes an outdoor sensor, a strap-on pipe sensor, and three high-precision cylindrical sensors—everything you need for a seamless installation. You’ll also receive a ready-to-build schematic diagram, a detailed electrical wiring diagram, and fully pre-installed programming on the controller, provided both on an SD card and as a printed hardcopy. It’s a turnkey solution designed to save you time, reduce setup complexity, and deliver reliable performance from day one.

Target Clients:

This solution is designed for homeowners and professionals using heat pumps who want full-house radiant heating and cooling control—whether or not they rely on Wi-Fi smart thermostats for room-by-room heating or cooling calls. For radiant cooling applications, proper condensation management is critical, and this system delivers exactly that. It provides precise mixing-valve control along with continuous room temperature and relative humidity monitoring, ensuring safe, efficient, and comfortable operation throughout the entire home

The Resol DeltaTherm HC MAX can operate two common types of heat pumps that feature external control via dry-contact terminals—managing both Heating/Cooling mode switchover and compressor enable/disable functions:

Type 1 Air-To Water HP                     Type 2 Air-To Water HP

This gives you seamless integration with most modern heat pump systems, ensuring precise, automated control without the need for additional interface modules. The result is a smarter, more responsive radiant heating and cooling setup that adapts instantly to your home’s comfort demands while protecting system efficiency and longevity.

Benefits:

• All-in-one intelligent control: Every major control function and logic is handled directly by the Resol DeltaTherm HCMAX—from heat pump management to radiant zone calls for both heating and cooling. No extra controllers or complicated integrations required.

• Compatible with your preferred smart thermostats: Homeowners can continue using the Wi-Fi smart thermostats they already love, while the HCMAX handles the heavy lifting behind the scenes.

• Affordable, easy-to-source components: All required auxiliary electrical parts are clearly specified and shown in our diagrams. They’re cost-effective, widely available, and simple to procure.

• Fast, frustration-free setup: With ready-to-build programming and complete schematic and wiring diagrams, you can get your system up and running quickly and confidently.