Mitsubishi Electric LGH-50RVS-E Operating Instructions Manual page 4

n Display and Function button (PZ-62DR-E)
MENU RETURN SELECT
button button button
Function buttons
F1 F2 F3
Backlit LCD
ON/OFF lamp
ON/OFF
button
F4
n LOSSNAY HEAT RECOVERY VENTILATION
setting
Both fresh air supply and return air pass through the Lossnay cores.
Heat recovery ventilation makes the fresh air temperature close to
the indoor temperature in the winter and the summer season.
Return air
Supply air
n BY-PASS VENTILATION setting
The fresh air passes through the Lossnay cores and the return room
air is exhausted directly. By-pass ventilation is normally operated
during the spring/autumn season.
Return air
Supply air
n AUTOMATIC VENTILATION setting
The automatic ventilation mode automatically provides the correct
ventilation for the conditions in the room. The following shows the
effect "By-pass" ventilation will have under various conditions.
1. Reduces cooling load
If the air outside is cooler than the air inside the building during
the cooling season (such as early morning or at night), "By-pass"
ventilation will draw in the cooler outside air and reduce the cooling
load on the system.
2. Night purge
"By-pass" ventilation can be used to release hot air from inside the
building that has accumulated in buildings in a business district
during the hot summer season.
3. Office equipment room cooling
During cold season, fresh air can be drawn in and used as is to
cool rooms where the temperature has risen due to the use of
office equipment.
CAUTION
• In the case of "By-pass" ventilation, the supply air temperature
slightly rises more than the outside air temperature because of
the heat effect around the ducts or the unit motors.
Eng-4
Damper
Exhaust air
Fresh air
Lossnay core
Damper
Exhaust air
Fresh air
Lossnay core