Mitsubishi Electric Y Series Manual page 216

FEATURES
216
ATW Unit - Booster Unit
PWFY-P100VM-E-BU
Benefiting from the heat recovery operation of the CITY MULTI R2/WR2 system, the
booster unit converts energy from the air to higher temperatures suitable for supplying
hot water with virtually no wasted energy.
Connectable to
CITY MULTI
R2/WR2 Series
• System outline
OUTSIDE
R2 outdoor unit
What makes the booster unit unique?
Booster unit
1
CITY MULTI
R2/WR2
BC controller
Series
Red High pressure gas refrigerant
Orange High pressure 2-phase refrigerant
Green High pressure liquid refrigerant
Blue Low pressure gas refrigerant
Applications
Sanitary water,
shower, etc.
MACHINE ROOM INDOOR
BC controller Indoor unit
Booster unit
Tank
(procured locally)
COMP
Hot water
supply
3
2
Water supply
Indoor
unit
Operation
Up to 70°C
The booster unit is connected to a BC
controller with refrigerant pipes and to the
water tank with water pipes. The waste heat
from cooling operation is utilized in the
heating operation for providing hot water.
Red High pressure gas refrigerant
Orange High pressure 2-phase refrigerant
Green High pressure liquid refrigerant
Blue Low pressure gas refrigerant
Refrigerant flow
From the BC controller, high pressure R410A gas
1
refrigerant is delivered to the Booster unit to exchange
heat with the low pressure R134a liquid refrigerant
circulating through and returns to the BC controller
2
as a high pressure liquid refrigerant.
Refrigerant R134a circulates inside the two plate heat
2
exchangers inside the unit.
Temperature rises as low pressure R134a gas refrigerant
is compressed by the compressor and becomes a high
pressure gas refrigerant.
Water supply
3 Water entering the Booster unit exchanges heat with
high pressure R134a gas refrigerant. The hot water
circulates to heat the water inside the tank, to be used
for showers, sanitary water, etc.