21 Outdoor unit sound reduction To manually set the time for low noise operation, the external control adaptor DTA104A61/62/63 can be used. Standard 5 low sound steps All of our VRV 5 outdoor units have standard 5 low sound steps to reduce the sound pressure down to 39 dB(A) via a field setting. For areas where there are stringent limitations to sound levels, the outdoor unit sound level can be easily reduced. Capacity* % Load % Operation Sound dBA Example for VRV IV+ heat pump, factory setting. 100% 50% 8 hrs 10 hrs Night mode Starts Night mode Ends Night mode Step 1 Step 2 Peak in the outdoor temperature Ensure optimal IAQ using CO2 sensors Enough fresh air is needed to create an enjoyable environment, but ventilating constantly is leading to energy waste. Therefore an optional CO2 sensor regulates the ventilation system to provide the needed fresh air to the room, avoiding over-ventilation and saving energy. Example of CO2 sensor operation in a meeting room: CO2 level Ventilation amount Fixed ventilation rate Morning meeting Lunch time Meeting 7 8 9 10 11 12 13 14 15 16 17 18 19 hour Decrease in air volume and more energy saving compared to fixed ventilation rate Increase in air volume and better comfort compared to fixed ventilation rate When many people are in the room, more fresh air is brought in to maintain comfortable CO2 levels. When fewer people are in the room, energy is saved by bringing in less fresh air. 9 AM 5 PM 12 PM Low operation sound level
RkJQdWJsaXNoZXIy MTE0MTkzMg==