Double Back-Up Function - Vrvii; Duty Cycling - Vrvii & Vrv-Wii; Special Oil Equalising Technology - Daikin VRV II Series Technical Data Manual

3 High reliability
3-2

Double back-up function - VRVII

In the event of a compressor malfunction, the remotely controlled or field set back-up function in the outdoor unit in question (and also between
different outdoor units) will allow emergency operation of another compressor in order to maintain 8 hour maximum interim capacity
3-3 Duty cycling - VRVII & VRV-WII
The cyclical start-up sequence of multiple outdoor unit systems equalises compressor duty and extends operating life.
3
3-4

Special oil equalising technology

The incorporation of this technology ensures that the optimum quantity of oil is contained in each outdoor unit module in order to maintain compressor
reliability. Automatic checks are carried out every 6 minutes on the number of compressors in operation and also to ascertain that there is enough oil to
keep them running.
Each compressor in a VRVII outdoor unit is equipped with an internal oil equalising circuit, comprising an oil separator and oil return circuit. This ensures
that the maximum quantity of oil is returned to the compressor case before entering the REFNET piping network.
10
• VRVII & VRV-WII features
• Systems • VRVII & VRV-WII features