Digital microcontroller solar heating controller with temperature differential control, anti-freeze, and overheat protection functions.
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.
| Weight | Approx. 300 g |
|---|---|
| Dimensions | 117 x 32 x 57 mm |
| Temperature Range | -9.9 to 99.9°C |
| Sensor Type | NTC 10K, 1% B:3980/25°C |
| Power Supply | 90 ~ 240 Vca (external source included) |
| Relay Output | Max 1/2 CV at 127 Vca, 1 CV at 220 Vca |
| Resolution | 0.1°C |
| Controlled Pump | Water circulation pump |
The temperature range is -9.9 to 99.9°C.
It uses NTC 10K, 1% B:3980/25°C sensors.
The pump is controlled via a relay output with a maximum of 1/2 CV at 127 Vca and 1 CV at 220 Vca.
The resolution is 0.1°C.