Room unit for ACD03, ACD04

Product detailed description

Room unit ARU 5, ARU 10, and ARU 30 for the ACD03, ACD04 weather-compensating control.

- works on the basis of serial communication (it is not a classic room thermostat). It senses the temperature of the space where it is installed.

ARU5 - temperature sensor
ARU10 - without display
ARU30 - touch display

Note: To connect a second or third ARU30 room unit, a 12 V DE06-12 or MEAN WELL GS06E-3P1J power supply must be purchased separately.

Frequently Asked Questions

• How can I check that the “Room Unit for ACD03, ACD04” fits my exact appliance? The most reliable way is to compare the exact type/catalogue designation on your appliance's nameplate (boiler, storage tank, water heater) with the compatibility stated directly in this product's name (Atmos brand) and in its technical parameters above. If in doubt, send us the exact type designation of your appliance (including the serial number, if available) - we will gladly verify compatibility for you.
• Why is it important to use the original/compatible part rather than a universal replacement? Parts such as gaskets, sensors or safety elements (safety valves, thermal fuses) are usually dimensioned exactly to the parameters of the specific appliance (pressure, temperature, sensor resistance) - the wrong part can cause reduced function, leaks, or in the case of safety elements, a real safety risk.
• Does this part have to be installed by a professional? For simpler, mechanical parts (e.g. gaskets, covers, small accessories with no connection to electricity, gas or the pressure system) a handy DIYer can usually manage the replacement after disconnecting the appliance from power and the system. However, for any work on the gas, electrical or pressure parts of the appliance (e.g. sensors directly in the combustion chamber, safety valves, electrical modules) we always recommend a service technician - especially since such work could affect the validity of the warranty on the whole appliance.
• How do I know this part is worn and needs replacing? Common signs are visible wear/cracking (for gaskets and rubber parts), water or flue gas leaking at the part, an error message on the control display (for sensors and electronic modules), or a clearly reduced function of the appliance (e.g. irregular burning in burner parts). If in doubt, the safest option is to have a service technician assess the condition during the regular annual inspection.
• Is it worth keeping this part at home as a spare? For parts that are subject to regular wear (gaskets, fuses, small mechanical parts) and whose failure would mean an outage of heating or hot water, keeping a spare on hand is a sensible precaution - especially for an older appliance for which the part may be harder to source quickly.