Mitsubishi Electric City Multi PEFY-P125VMH-E Specifications Page 8

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“2-pipe” system provides
Better Efficiency and Performance
Comparison example of piping connection sites
Outdoor Unit Outdoor Unit
Indoor Units Indoor Units
Solenoid Box
MITSUBISHI ELECTRIC OTHER MANUFACTURERS
BC Controller
CITY MULTI R2 3 Pipe System
= 2 sites = 3 sites
How does the R2/WR2 Heat Recovery System
operate on 2 Pipe’s?
The secret of CITY MULTI heat recov-
ery systems lies in the
The BC Controller houses a liquid/gas separator,
allowing the outdoor unit to deliver a mixture (2
phase) of hot gas for heating and liquid for cooling,
all through the same pipe. Three pipe systems
allocate a pipe to each of these phases. When this
mixture arrives at the BC Controller, it is separated
and the correct phase delivered to each indoor unit
depending on the individual requirement of either
heating or cooling.
BC Controller
T he world’s first and
the only “2-pipe” system
Heating=gas refrigerant
Cooling=liquid refrigerant
Meet the demand of
cooling / heating flexibly.
Indoor unit
2
1
R2/WR2 refrigerant circuit
3
High pressure and low pressure
decides the compressor frequency
and the mode of heat exchanger,
and control the amounts of heat
exchange.
Adjust the refrigerant flow by temperature
difference between inlet and outlet.
Gas-liquid 2-phase refrigerant from outdoor unit into
gas refrigerant and liquid refrigerant is divided by
gas-liquid separator in BC controller.
BC controller divides refrigerant to each indoor unit
properly in compliance with the operation mode of
each indoor unit.
High pressure
gas-liquid 2 phase
refrigerant
Outdoor unit
BC controller
Gas refrigerant
Gas
refrigerant
Liquid refrigerant
Heating Heating Cooling Cooling
Liquid
refrigerant
25°C 26°C 22°C 24°C
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