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- Last added
- 2026-11-06
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THOLZ MMZ1 304 N – P 743 Solar Heating Controller User Manual
The THOLZ MMZ1 304 N – P 743 is a digital microcontroller designed for solar heating applications. It controls water circulation based on the temperature difference between solar collectors and a thermal reservoir. It includes anti-freeze and overheat protection features. The unit features an LCD display, programmable temperature settings, and relay output for pump control. Installation requires a technician and compliance with NBR5410 electrical standards.
The controller operates in automatic, manual, or off modes. It uses two NTC sensors and a relay output to control a pump. Temperature settings can be adjusted for comfort, anti-freeze, and overheat protection. The display shows temperatures or the temperature differential, and the unit has programmable parameters accessible via a dedicated key and increment/decrement buttons. This manual is written in Portuguese.
Covers: Characteristics · Specifications · Presentation · Operation Mode · Temperature Indication · Level 1 Programming (User Access)
Latest THOLZ manuals
THOLZ MMZ1 304 N – P 743 Solar Heating Controller User Manual
User Manual 2 pages · 1.3 MB · PTDigital microcontroller solar heating controller with temperature differential control, anti-freeze, and overheat protection functions.
Which document do I need?
User Manual
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in THOLZ manuals
What is the temperature range of the controller?
The temperature range is -9.9 to 99.9°C.
From: THOLZ MMZ1 304 N – P 743 Solar Heating Controller User Manual
What type of sensors does the controller use?
It uses NTC 10K, 1% B:3980/25°C sensors.
From: THOLZ MMZ1 304 N – P 743 Solar Heating Controller User Manual