Mitsubishi Electric LGH-15RVX-E Operating Instructions page 3

Operation (continued)
n LOSSNAY ENERGY RECOVERY VENTILATE
setting
Both fresh air supply and return air pass through the energy
recovery cores. Energy recovery ventilation makes the fresh air
temperature close to the indoor temperature in the winter and the
summer season.
Models LGH-15 to 100RVX-E Models LGH-150 and 200RVX-E
Damper
Exhaust air
Return air
Fresh air Supply air
Lossnay core
n BY-PASS VENTILATE setting
The fresh air passes through the Lossnay cores and the return
room air is exhausted direct. Lossnay By-pass ventilate is normally
operated during the spring/autumn season.
Models LGH-15 to 100RVX-E Models LGH-150 and 200RVX-E
Damper
Return air
Exhaust air
Fresh air Supply air
Lossnay core
Maintenance
Remove all dust and dirt on air filters and Lossnay cores at regular
intervals in order to prevent a deterioration in the Lossnay functions.
Guideline: Clean the air filters once a year.
(or when are indicated on the remote controller)
Clean the Lossnay cores once two year.
(Clean the Lossnay cores once a year if possible.)
(Frequency should be increased depending on the extent of dirt.)
Removing the parts
1) Maintenance cover
1. Remove the black screw.
2. Slide the fix piece to out side.
3. Open hinge wire.
Maintenance cover
Fix piece
Black screw
Hinge wire
Models LGH-150 and 200RVX-E have 2 fix pieces.
2) Lossnay cores
Take hold of the handle and draw the Lossnay cores out from the
main unit.
Lossnay core
Handle
Main unit
Air filter
Models LGH-15 to 100RVX-E Models LGH-150 and 200RVX-E
Damper
Exhaust air Return air
Supply air
Fresh air
Exhaust air
Return air
Fresh air
Supply air
Lossnay core
Damper
Exhaust air Return air
Fresh air Supply air
Exhaust air
Return air
Fresh air Supply air
Lossnay core
Handle Main unit
Lossnay
core
Air filter
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 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
l 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.
l When set to auto ventilation mode while using the pre-heater
function, the outdoor temperature may be detected as higher
and the mode may change to by-pass mode, even in winter.
3) Air filters
After pulling out the Lossnay cores, undo filter guides, then
remove the air filters, located at the bottom left and right of the
Lossnay cores, as below.
Filter stopper
Model LGH-15RVX-E: 1 core, 2 filters
Models LGH-25 to 100RVX-E: 2 cores, 4 filters
Models LGH-150 and 200RVX-E: 4 cores, 8 filters
CAUTION
l Bow filter stoppers a little to remove them from filter guide.
l Take filter stoppers careful not to break them.
Cleaning the parts
1) Air filters
Use a vacuum cleaner to remove light dust. To remove stubborn
dirt wash in a mild solution of detergent and lukewarm water.
(under 40˚C)
Vacuum cleaner
Air filter
CAUTION
l Never wash the filters in very hot water and never wash them
by rubbing them.
l Do not dry the filters by exposing them to a flame.
Eng-3
Filter guide