Mitsubishi Electric Y Series Manual page 173

High sensible heat operation (during cooling)
Y-Series EP R2-Series EP WY-Series
Y-Series P R2-Series P WR2-Series
Evaporating temperature is controlled according to room temperature and humidity.
• Image of evaporating temperature control during high sensible heat operation in full cooling mode
Difference between indoor unit
Low
inlet temperature and set temperature
• Image of installation of locally-procured humidity sensors
CN3S
(Outdoor unit PAC-SC36NA-E
(Optional part)
control board)
Humidity
sensor
• Temperature and humidity conditions
Comfort level
Comfortable
temperature and
humidity
High sensible
heat operation
High humidity
High temperature
and humidity
In high sensible heat operation mode, air conditioners consume
less energy, thereby realizing cost savings.
With the installation of a locally-procured humidity sensor, the
Hi
evaporating temperature of the outdoor/heat source unit can be
(low humidity)
controlled optimally as shown below according to the difference
between the indoor unit inlet temperature and set temperature.
A wide range of temperature settings is available, from a low
Lo
evaporating temperature close to normal operation temperature to
(high humidity)
a high evaporating temperature to realize energy savings.
High
2
Control board
IC01 IC02
Humidity
sensor
Zone
in room
Comfortable
Comfortable zone
A little
humid
Comfortable zone
Uncomfortable
Comfortable zone
*Control board is to be
configured onsite.
Humidity
1
information
IC03
Humidity
sensor
**Humidity sensor → locally procured
Status of
outdoor unit
Comfortable and
energy-saving
operation even at low
compressor rotating
speed
Temperature
Compressor rotates at
medium speed to
reduce humidity
Temperature
Compressor rotates at
high speed to reduce
temperature and
humidity
Temperature
OUTDOOR UNIT FUNCTIONS
Humidity information is sent to
1
the control board.
The control board judges the
2
humidity information and sends a
HIGH/LOW signal to the outdoor
unit through CN3S. The outdoor
unit shifts the evaporating
temperature depending on the
information from the control
board.
Evaporating
temperature control
Temperature of
indoor unit refrigerant

is kept high

Low Difference between indoor unit
High
inlet temperature and set temperature
Temperature of
indoor unit refrigerant

is slightly reduced.

Low Difference between indoor unit High
inlet temperature and set temperature
Temperature of
indoor unit refrigerant

is greatly reduced.

Low Difference between indoor unit High
inlet temperature and set temperature
173
Hi
Lo
Hi
Lo
Hi
Lo