NANO VDR 2600, Instruction Book, Page: 22 / 96

The refrigerant enters evaporator (101b), where it withdraws heat from the compressed air by
further evaporation at constant pressure. The heated refrigerant leaves the evaporator and is
sucked in by refrigerant compressor (209) via liquid separator (207).
The dryers are provided with a sight-glass (211). The sight-glass allows the refrigerant flow in the
line to be checked. During normal operation, the liquid flow must be clear. In general, vapor bubbles
indicate a shortage of refrigerant. Note that fluctuations in the load may cause bubbles to pass in
the flow for a short time. The centre of the glass is provided with a moisture indicator which is green
when the liquid refrigerant is free of moisture. It will turn yellow when the refrigerant contains
moisture, indicating that the refrigerant dryer/filter (206) needs to be replaced.
Instruction book
20 2987 2020 00