Maxiflame HB SOLAR XL solar group – double pipe for high flow systems

The Maxiflame HB SOLAR XL is a complete solar station designed for the control, circulation and management of the heat transfer fluid in solar thermal systems.

In practice, it is the operational heart of the solar system : the component that allows the heat to be transferred from the solar panels to the storage tank (boiler or buffer tank), ensuring efficiency, safety and consistent performance over time.

What it is and what it is used for

HB SOLAR XL is a high flow double tube solar group , designed for:

manage the heat produced by solar collectors
transfer it to the ACS boiler or inertial storage tank
check the flow and pressure of the circuit

In a solar thermal system, without this group:

heat is not distributed properly
the system loses efficiency
the risk of malfunctions increases

Where to use it

It is designed for:

advanced domestic solar thermal systems
systems with multiple solar collectors
systems for the production of domestic hot water (DHW)
systems with storage (puffer or boiler)

It is particularly suitable for:

large houses
accommodation facilities
centralized systems

In fact, it is designed for high flow and higher power systems

How it works

The operation is simple but fundamental:

Solar panels heat the heat transfer fluid

The HB SOLAR XL group activates the circulation pump

The hot fluid is transferred to the storage tank

The system regulates:

flow rate (flowmeter)
pressure
safety

Everything happens in a controlled and continuous manner.

The installation data sheet (attached) clearly shows the central role of the group between collectors and boiler.

Why it is advantageous

This module integrates into a single system:

circulation pump
flowmeter for flow control
safety valve and pressure gauge
venting systems and gravity brakes

In this way:

optimizes heat transfer
improves system efficiency
reduces consumption and waste
increases safety and durability over time

It is particularly advantageous in systems with multiple collectors or high flow rates, where precise and stable control is required.

Installation

The HB SOLAR XL group is installed between the solar collectors and the storage tank , becoming the central point of the solar circuit.

It mounts to the wall in a vertical position and connects:

to the panel circuit (solar flow and return)
to the accumulation (boiler or buffer)
to the regulation system (control unit, optional)

Installation must be performed by qualified personnel to ensure safety and correct operation.

TECHNICAL CHARACTERISTICS

Connections: 1”
Flowmeter range: 5–35 l/min
System power: up to 35 kW
Collector surface area: up to 70 m² (high flow)
Pump: Wilo Para 15/8 STG
Max pressure: 6–10 bar
Max temperature:
- flow rate: 140°C
- return: 120°C
Power supply: 230V
Dimensions: 377 x 440 x 220 mm

NB: FOR FURTHER DETAILS WE RECOMMEND VIEWING THE TECHNICAL DATA SHEET ATTACHED.

WARRANTY

The warranty is the official Maxiflame Italia one and lasts 2 years.

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