Mitsubishi Electric Y Series Manual page 218

FEATURES
218
• System outline of the HEX unit with Y-Series
OUTSIDE
Y outdoor unit
What makes the HEX unit unique with the Y/WY Series?
Hot water supply
HEX unit
CITY MULTI
Y/WY
Series
Cold water supply
HEX unit
CITY MULTI
Y/WY
Series
MACHINE ROOM
Tank
HEX unit
(procured locally)
1 2
Red
Indoor
Purple
unit
1 2
Green
Blue
Indoor
unit
The HEX unit is connected to the Y outdoor
INDOOR
unit with refrigerant pipes and to the water
tank with water pipes. It is not equipped with
a compressor.
Indoor unit
Green
Fan coil
Machine cooling
Blue
Refrigerant flow
From the outdoor unit, high pressure R410A gas
1
Hot water
refrigerant is delivered to the HEX unit and returns to
supply
the unit as low pressure 2-phase refrigerant.
Water supply
Water entering the HEX unit exchanges heat with the
2
Water
R410A refrigerant and circulates to heat the water
supply
inside the tank.
High pressure gas refrigerant
Low pressure 2-phase refrigerant
Refrigerant flow
From the outdoor unit, high pressure R410A liquid
1
Cold water
refrigerant is delivered to the HEX unit and returns to
supply
the unit as low pressure gas refrigerant.
Water supply
Water entering the HEX unit exchanges heat with the
2
Water
R410A refrigerant and circulates to cool the water
supply
inside the tank.
High pressure liquid refrigerant
Low pressure gas refrigerant
High pressure liquid refrigerant
Low pressure gas refrigerant