Piping Diagrams - Midea Mini VRF MDV-V105W/DN1 Technical & Service Manual

R410A All DC Inverter Mini VRF

4. Piping Diagrams

High pressure
switch
Oil seperator
Oil return
capilary
Compressor
Low pressure
switch
Oil separator: used to separate oil from high pressure & temperature gas refrigerant, which is pumped out
from compressor. It makes the oil return back to each compressor very soon.
Low pressure liquid receiver & High pressure liquid receiver: It is used to store the liquid refrigerant and
oil; it can protect the compressor from liquid hammer.
4-way valve: Closed in cooling mode and open in heating mode
Electronic expansion valve: The opening is of the valve is regulated according to the discharge air
temperature of compressor, used to regulating refrigerant flow.
High Pressure Switch: When the discharge pressure of compressor is 4.2Mpa or higher, the protection
switch will be triggered, and if the discharge pressure is down to 3.3MPa, the protection switch will be
recovered.
Low Pressure Switch: When thegas pressureback to compressor is 0.14Mpa or lower, the protection switch
will be triggered, and if the discharge pressure is down to 0.3MPa, the protection switch will be recovered.
16
Condensor
Low pressure
liquid
accumulator can
Electronic
expansion
valve
High pressure
liquid
accumulator
can
MCAC-VTSM-2016-10
Evaporator
Electronic
expansion
valve
Specifications & Performance