Mitsubishi Electric LGH-15RVX3-E User manual

Eng-1
2303N22HHZA0012
Please read this manual carefully before use for proper and safe use.
Do not attempt to install the product by yourself.
LGH-15RVX3-E
LGH-25RVX3-E
LGH-35RVX3-E
LGH-50RVX3-E
LGH-65RVX3-E
LGH-80RVX3-E
LGH-100RVX3-E
LGH-160RVX3-E
LGH-200RVX3-E
Lossnay Energy Recovery Ventilator
MODELS:
Operating Instructions For the user

Eng-2
2303N22HHZA0012
1. Safety precautions
The following signs indicate that death or serious injury may be caused by failure to heed the precautions described below.
WARNING Incorrect handling could cause serious injury or death.
Prohibited
Do not turn the unit on or o󰀨 when ammable gas has leaked.
It could catch re or cause explosion with sparks released from electrical components.
Open windows to ventilate.
Do not
disassemble
Do not modify or disassemble.
It could cause re, electric shock or injury.
Do not wet
Do not apply water to the unit and remote controller.
Electrical shock can result.
Do not touch
Do not poke your ngers or sticks into the air intake and outlet while the product is operating.
Failure to heed this warning may result in injury.
Wet hands
prohibited
Do not operate with wet hands.
Electrical shock can result.
The instructions
given must be
followed.
Use the specied power supply and voltage.
Use of incorrect power supply could cause re or electric shock.
Make sure the power supply isolator is turned o󰀨 before starting maintenance.
It could cause electric shock or injury if it is turned on.
When any abnormal conditions (burning smell, water leakage or others) are observed, stop operation, turn o󰀨 the
power supply isolator and consult your dealer.
Continuing operation under such conditions could cause, electric shock, re, or damage.
Do not touch the product for at least 5 minutes after the power is shut o󰀨.
Electrical shock can result.
CAUTION Incorrect handling could cause injury or damage to property or household e󰀨ects.
Prohibited
Do not place a burning appliance in a place where it is exposed directly to the wind from Lossnay.
It could cause an accident as a result of incomplete combustion.
Do not operate with the “BY-PASS” when heating the room in winter.
Condensed water may drip from the unit and wet the surface of ceiling.
Do not use at a place where exposed to high temperatures (40˚C or higher), naked ames, or in environment with
heavy fumes.
It could cause re.
Do not use in an environment such as a chemical factory, where hazardous gases such as acidic gases, alkaline gases,
organic solvent fumes, paint fumes, or gases containing corrosive components are generated.
It could malfunction.
The instructions
given must be
followed.
Securely install parts after maintenance.
It could cause injury if parts fall.
Put on gloves during maintenance.
It could cause injury.
Make sure the power supply isolator is turned o󰀨 when Lossnay is not used for a long period of time.
It could cause electric shock, power leakage, or re as a result of deteriorated insulation.
When outdoor temperature becomes lower than -10˚C, the supply fan starts intermittent operation for defrosting
operation.
-10˚C to -15˚C : Intermittent operation 10min OFF, 60min ON.
-15˚C or less : Intermittent operation 55 min OFF, 5 min ON.
Other than EU countries:
This appliance is not intended for use by persons (including children) with reduced physical sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not
play with the appliance.
EU countries:
This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or
mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning
use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by children without supervision.

Eng-3
2303N22HHZA0012
Lossnay can be connected with Lossnay remote controller (PZ-62DR-EA/EB), and other Systems
(City Multi, Mr. Slim, Central controller (MELANS) )
Following shows the use of PZ-62DR-EA/EB. Please refer to the manuals for the other systems.
For connection of a Lossnay remote controller (PZ-62DR-EA/EB)
If the Lossnay’s operation is linked with the operation of an external device such as an air conditioner, the method of use will di󰀨er, so carry
out the appropriate operation in accordance with the following table. Also, please see the installation and user manual for the Lossnay remote
controller (PZ-62DR-EA/EB).
<Not connected to an external device>
Example of System Operation Function
Run using the remote
controller. If 2 remote controllers are used, the last touch has priority.
<Connected to an external device>
Lossnay unit can be turned
ON or OFF when the signal
from external device is
connected to Lossnay ON/
OFF terminal.
If you would like to turn ON the Lossnay alone while
the external device is OFF, operate it by the Lossnay
remote controller.
The fan speed is xed on fan speed 4. (factory
setting)
The ventilation mode is “Auto Ventilation Mode”.
Lossnay
Power Supply
Remote Controller
(Optional parts)
(PZ-62DR-EA/EB)
Lossnay
Power
Supply
External
device
Power Supply
Operation switch for the external device
Lossnay
Power Supply
Power Supply
Operation switch for the external device
External device
Remote Controller
(Optional parts)
(PZ-62DR-EA/EB)
3. Operation
2. Names of the parts
Models 15 to 100RVX3 Models 160 and 200RVX3
Control box
Lossnay core holder
Air lter
Lossnay core
Air supply fan
Maintenance cover
Fix piece
Damper plateAir exhaust fan
Lossnay core holder
Thermistor Air lter
Lossnay core
Maintenance cover
Control box
Air supply fan
Damper plate
Air exhaust fan
Fix piece
Thermistor

Eng-4
2303N22HHZA0012
nDisplay and Function button (PZ-62DR-EA/EB)
Backlit LCD
ON/OFF lamp
F1 F2 F3 F4
MENU
button RETURN button SELECT button ON/OFF
button
Function buttons
nAUTOMATIC VENTILATION setting
The automatic ventilation mode automatically provides the correct
ventilation for the conditions in the room. The following shows the
e󰀨ect “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. O󰀩ce 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 o󰀩ce
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 e󰀨ect around the ducts or the
unit motors.
nCO2sensor control
When CO2 sensor is connected, “Auto” fan speed can be selected.
In “Auto” mode, the fan speed changes automatically according to
the CO2sensor concentration.
Exhaust air
Fresh air
Lossnay core
Damper
Return air
Supply air
Exhaust air
Fresh air
Lossnay core
Damper
Return air
Supply air
Return air
Supply air
Exhaust air
Fresh air
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.
Fresh air
Exhaust air
Lossnay core
Damper
Return air
Damper
Return air
Supply air
Supply air
Lossnay core
Exhaust air
Fresh air Fresh air
Exhaust air Return air
Supply air
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 15 to 100RVX3 Models 160 and 200RVX3
Models 15 to 100RVX3 Models 160 and 200RVX3

Eng-5
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Remove all dust and dirt on air lters and Lossnay cores at regular
intervals in order to prevent a deterioration in the Lossnay functions.
Guideline:
Clean the air lters once a year. (or when are indicated on the
remote controller)
Clean the Lossnay cores once two years.
(Clean the Lossnay cores once a year if possible.)
(Frequency should be increased depending on the extent of dirt.)
WARNING
• Make sure the power supply isolator is turned o󰀨 before
starting maintenance.
It could cause electric shock or injury if it is turned on.
• Do not touch the product for at least 5 minutes after the power
is shut o󰀨.
Electrical shock can result.
• For vertical installation, observe 4.4 Additional precautions for
vertical installation.
CAUTION
• Put on gloves during maintenance.
It could cause injury.
• Securely install parts after maintenance.
It could cause injury if parts fall.
4.1 Removing the parts
1) Maintenance cover
1. Loosen the black screw of x piece.
2. Slide the x piece down.
3. Open hinge wire.
Note
• Don't forget to x Hinge wire and x piece after any procedure,
cleaning lters or cores.
2) Air lters
Withdraw air lters.
Models 15 to 100RVX3
Models 160 and 200RVX3
Fix piece
Maintenance coverBlack screw
Hinge wire
Lossnay core
Air lter
Air lter
4. Maintenance
Note
• When the unit is installed upside down, air lters are
positioned upper Lossnay cores.
3) Lossnay cores
Withdraw Lossnay cores.
Hold the handle and draw the Lossnay cores out from the unit.
Models 15 to 100RVX3
Models 160 and 200RVX3
4.2 Cleaning the parts
1) Air lters
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)
CAUTION
• Never wash the lters in very hot water and never wash them
by rubbing them.
• Do not dry the lters by exposing them to a ame.
• Replace the lter with a new one which can be got as an
optional parts.
2) Lossnay cores
Use a vacuum cleaner to suck up the dust and dirt on the exposed
surfaces of the Lossnay cores.
Use a soft brush only to clean exposed surface areas.
Do NOT wash in water.
CAUTION
• Do not use the hard nozzle of the vacuum cleaner. It may
damage the exposed surfaces of the Lossnay cores.
• Under no circumstances should the Lossnay cores be washed
in water.
Lossnay core
Lossnay core
Handle
Handle
Vacuum cleaner
Air lter
Vacuum cleaner
Lossnay core

Eng-6
2303N22HHZA0012
4.3 Assembly after maintenance
Bearing in mind the following points, assemble the parts following the
sequence for their removal in reverse. Check the x piece does not
slide o󰀨 the hinge wire by the black screw.
• Arrange the Lossnay core with the air lter side downward. When
the unit is installed upside down, air lters are positioned upper
Lossnay cores.
• The lter has front and back side. Set the arrow mark on the lters
as the air ow direction.
Note
• If are indicated on the remote controller, turn o󰀨 the
indication, after maintenance.
4.4 Additional precautions for vertical
installation
• When unit is installed vertically, follow below instructions. For
items not described in this section, follow the instructions in other
sections.
• Do not touch the unit where it is not related with the maintenance
work.
• Do not place anything on the unit.
• Do not lean on, or put your weight on the product. There is a risk of
product deformation or injury.
• When inserting or removing Lossnay cores, securely hold the
handle until the end and insert or remove them one by one.
Otherwise, some parts might be damaged.
Maintenance cover
Hinge wire
Fix piece Black screw

Eng-7
2303N22HHZA0012
If you hear strange sounds, if no air is blown out or if some other
trouble occurs, switch o󰀨 the power and contact your dealer. Consult
with your dealer concerning the cost of inspection or repair work.
Consult with your dealer about the after-sales services provided for
this Lossnay product.
6. After-sales servicing
5. Specications
Model name Input power
(W) Air volume Static pressure (Pa) Temperature exchange e󰀩ciency (%)
Noise (dB)
1.5 m below the unit Weight (kg)
(m3/h) (L/S)
LGH-15RVX3-E 55 150 42 120 73.5 27 20
LGH-25RVX3-E 75 250 69 120 75.5 30.5 22
LGH-35RVX3-E 120 350 97 160 75 30.5 30
LGH-50RVX3-E 185 500 139 150 70.5 35 33
LGH-65RVX3-E 245 650 181 150 72.5 37.5 41
LGH-80RVX3-E 343 800 222 170 75 39 47
LGH-100RVX3-E 438 1000 278 190 75.5 40 53
LGH-160RVX3-E 687 1600 444 170 75 41 96
LGH-200RVX3-E 855 2000 556 170 76.5 41.5 108
* The above values apply during Lossnay ventilation when the fan speed is set to Fan speed 4 at the rating pressure loss, 230 V / 50Hz and
horizontal installation.
* For the specications at the other frequency or voltages, contact your dealer.
* The values given in the table for the noise level reect the levels measured at a position 1.5 meters directly under the unit in an anechoic
chamber.
* Noise change or increase may occur because of the Bypass-Automatic function or Automatic fan speed change by timer setting and/or other
functions.
* Temperature Exchange e󰀩ciency (%) are based on winter condition.
* For detail specication, contact your dealer or check specication sheet.
* On-site commissioning measurements by pitot tube method could be as much 20% di󰀨erent from ISO test room conditions. If the measuring
point is close to sources of turbulence like bends, contractions and dampers etc, it is di󰀩cult to measure air volume correctly. A straight duct
length more than 10D (D=duct diameter) from the source of turbulence is recommended for correct measurement. On-site measurement should
therefore be performed in accordance with BSRIA guideline (Commissioning Air System. Application procedures for buildings AG3/89.3(2001))
Attentive inspection
Inspect your unit of good service!
Have you
noticed?
● Fan do not run when the unit is turned on.
● Abnormal noises or vibrations while the unit is running
● Retarded or irregular rotations
(Motors are component which requires maintenance.)
● Burnt odor
● Corroded or damaged mounting parts or location
Stop
running.
Turn o󰀨 the unit. Then,
contact your dealer for
prevention of failure or
hazard. The dealer should
appraise the possible cost.
■ Recommended inspection and maintenance
After several years of use, the following might occur. We recommend inspection and maintenance by a professional.
- Entry of dust due to deterioration of lters
- Abnormal noise or vibration due to the motor reaching the end of its service life
- Air leakage due to the Lossnay core reaching the end of its service life
The following are consumables:
- Motor
- Supply air lter
- Exhaust air lter
- Lossnay core
- Circuit board
- Thermistor
■ Repair costs include technical fee, cost of parts, (and business trip charges), etc.
HEAD OFFICE:
TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Mar. 2023

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