Thermostat - 33ET+

Range

The 33ET+ electronic thermostat is available for water control and ventilation. For water control, it acts on valves with 230V TOR thermal motors. For ventilation, it can be used with either:

• 3-speed 230V AC motor
• 3-speed 0-10 V EC motor

The 33ET+ thermostat range comprises the following models:

• 33ET+A for a 2-pipe AC motor
• 33ET+B for a 4-pipe AC motor
• 33ET+C for a 2-pipe EC motor + electrical heater
• 33ET+D for a 4-pipe EC motor

The thermostat is designed for flush mounting, screwing into a standard 60 mm flush-mounting box.

It can also be surface-mounted using the supplied accessory.

Features & Benefits

• Manual or automatic switching between heating and cooling.
• Four operating modes: Comfort, Economy, Frost Protection, and Off.
• Power supply: 230 V
• Manual or automatic three-speed fan control.
• Weekly programming.
• Changeover via sensor or dry contact.
• Electrical heater (33ET+C only for a two-pipe, two-wire system).
• It has a potential-free input for a window contact.

Accessories

• The change-over probe kit: enables the automatic detection of the changeover from heating to cooling mode (and vice versa) in two-pipe systems. The kit includes a probe, a 2.5-meter cable, Faston lugs, and an adapter. This essential device ensures automatic mode changeover according to the temperature of the water circulating in the system.

• Surface Mounted Box: Used for installing the thermostat on the surface of a wall when flush-mounting is not possible. Ensures clean, discreet, and protected wall mounting.

• Relay kit: Mandatory for controlling electrical heater up to 2,000W.