Mitsubishi Electric Y Series Manual page 230

HOT WATER HEAT PUMPS
230
70ºC
High temperature
A "Flash Injection Circuit," which is designed for our ZUBADAN CITY MULTI air conditioning system for cold regions,
is incorporated in our new hot water heat pump. Through utilizing this advanced "Flash Injection Circuit" and the
latest high-efficiency compressor, the hot water heat pump is able to provide hot water of 70°C with the use of R407C
and with better retention of capacity at low outdoor temperatures.
Built-in
inverter-driven
scroll compressor
Highly
efficient
Backup
The hot water heat pump ensures an exceptionally high level of reliability through a backup function.* If either of the
compressors malfunctions, the other compressor maintains operation to avoid a complete stop of the system.
A rotation function is also available. When two or more units are in the system, the unit runs alternately, ensuring an optimum
product lifecycle for both component units.
*If the main circuit board malfunctions,
the backup function and rotation function
are not available.
*Capacity drops by 50%.
Operable even at
-20ºC
The hot water heat pump can be operated
at outdoor temp. between -20°C and
40°C.
It delivers precise comfort even on the
coldest days of the year.
Range of operation temperature
and outlet water temperature
80
-10 70
ºC /
70
60
-20 65
ºC / ºC
50
40
30
20
10
0
-30 -20 -10 0
outdoor temp. ºC DB
During defrosting, two compressors, which are
equipped within one unit, run alternately resulting
in less drop in outlet water temperature.
51dB A
(
Low sound pressure level
Lower sound pressure levels have been
achieved thanks to the development of
a new fan.
*Based on theoretical calculations for a distance of
10m.
Flash Injection Circuit
R407C
Air
HEX
LEV
HIC circuit
function
Backup
function
ºC
10 20 30 40 50
)
*
COP
Highly efficient
inverter-driven scroll
compressor
Water outlet
Plate
Water inlet
Comp.
LEV
A
Flash Injection Circuit
Rotation
Rotation
Backup
function
operation
Depending on settings, the rotation function is available
Wide
for units.
variety of external input/output
Various system configurations are available.
· Two external output for backup heater
· Analog input to control capacity
· Defrost signal
* Refer to the Data Book for other functions.
60Pa
External static pressure
Ducting can be connected to the inlet or outlet of the outdoor unit.
Either "60 Pa" or "0 Pa" can be selected.
Support
for open network
With the CRHV model, now allowing connection of an IT terminal, the
connection to the open network is now possible.
It will allow energy monitoring for the entire building including air
conditioners and other electric appliances.
It is also possible to control the water temperature and capacity of the
CRHV model.
Other
features
· The system is equipped with "Efficiency Priority Mode" and "Capacity
Priority Mode." "Capacity Priority Mode" is more effective when used with a
boiler because the boiler's fuel cost and CO
*COP 4.13
Over 4*
Outdoor temp.: 7ºC DB/ 6ºC WB
Outlet water temp.: 35ºC
High performance even at low outdoor temp.
Two-phase refrigerant is separated into liquid refriger-
ant and gas refrigerant at the point of A.
Liquid refrigerant, whose pressure is reduced by the
linear expansion valve (LEV), exchanges heat in the
HIC circuit and become gas-liquid two-phase refriger-
ant. This two-phase refrigerant flows into the injection
port in the compressor for controlling the increase of
the discharge temperature. Therefore the optimal
amount of refrigerant can be provided to the system
via the compressor, which makes it possible to
provide hot water of 70 ºC.
function
Compressors
run
alternately
* The factory setting is "0 Pa."
emissions can be reduced.
2