The TopControl Modular MAXI is an automatic expansion and pressure-maintaining device. The unit contains 2 VFD pumps (2x 100%) and an electronically controlled overflow valve. A separate EP storage tank is required.

The properties of the TopControl Modular MAXI:

• 2 VFD pumps (2x 100%)
• 1 electronically controlled overflow valve (1x 100%)
• At least 1 unpressurized expansion vessel needs to be added
• Operational pressure range up to 8.4 to 23.5 bar
• The maximum temperature at the point of connection: 70°C (over 70°C possible with auxiliary tank)
• Maximum safety temperature in the system: 110°C
• Maximum operating pressure (PN): 10 to 25 bar