Mitsubishi Electric LGH-50RVS-E User manual

English
Eng-1
Please read this manual carefully before use for proper and
safe use.
Do not attempt to install the product by yourself.
LGH-50RVS-E
LGH-80RVS-E
LGH-100RVS-E
Lossnay Heat Recovery Ventilator
MODELS:
Operating Instructions For the user
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 electric contractor.
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󰀨 on the power distribution panel 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 on the power distribution panel 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.
Contents
1. Safety precautions...........................................1
2. Names of the parts ..........................................3
3. Operation.........................................................3
4. Maintenance....................................................5
4.1 Removing the parts....................................5
4.2 Cleaning the parts......................................5
4.3 Assembly after maintenance......................6
5. Specications ..................................................7
6. After-sales servicing ........................................7
2105876H63701

Eng-2
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.
Do not use any detergent for maintenance and cleaning the unit. It may cause the damage of the drain pan.
It could cause water leakage.
When outdoor temperature becomes lower than 0˚C, the supply fan starts intermittent operation for defrosting
operation.
0˚C to -5˚C : Intermittent operation 10min OFF, 30min ON.
-5˚C or less : Intermittent operation 55 min OFF, 5 min ON.
Exhaust fan changes to fan speed 4 during supply fan stopping at 0 to -5˚C, or all condition at less than -5˚C.
Take precautions when using the product in a quiet location.
Rather 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
Lossnay can be connected with Lossnay remote controller (PZ-62DR-E), and other Systems (City
Multi, Mr. Slim, Central controller (MELANS) )
Following shows the use of PZ-62DR-E. Please refer to the manuals for the other systems.
For connection of a Lossnay remote controller (PZ-62DR-E)
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-E).
<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-E)
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-E)
3. Operation
2. Names of the parts
Exhaust air lter Supply air lter
Heat exchanger
(Lossnay core)
Maintenance cover for lters
Control box
Air supply fan Damper plate
Air exhaust fan
Maintenance cover for the
other parts
Drain catch basin
Backow stopper
Thermistor

Eng-4
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.
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.
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 in 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
• 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.
Damper
Return air
Supply air
Lossnay core
Exhaust air
Fresh air
Damper
Return air
Supply air
Lossnay core
Exhaust air
Fresh air
nDisplay and Function button (PZ-62DR-E)
Backlit LCD
ON/OFF lamp
F1 F2 F3 F4
MENU
button
RETURN
button
SELECT
button
ON/OFF
button
Function buttons

Eng-5
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 if they are dirty.
Clean the drain pan and Backow stoppers once a year. (Frequency
should be increased depending on their dirtiness.)
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.
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 for lters
Loosen four screws on the maintenance cover for lters.
2) Air lters
Draw the lters out from the unit.
Maintenance cover
for lters
Upper two screws are fastened
with keyhole tting, loosen them
enough to remove the cover.
Lower two screws have fall
protection washer, so they would
not come o󰀨 from the cover.
Maintenance cover
for lters
Air lter
4. Maintenance
3) Maintenance cover for the other parts
Remove it in the same way as maintenance cover for lters.
Maintenance cover for the other parts have also structure of
keyhole and fall protection screws.
4) Inner cover and motor cable
1. Pull out the upper part of the inner cover frontward and remove it
in the direction of the arrow in below picture.
2. Open the snap-in cable clamp and take out the motor cable from
it.
CAUTION
• In case of pulling out inner cover forcibly not following the
directions above, the styrol could be broken.
5) Lossnay cores
Hold the handle and draw the Lossnay cores out from the unit.
When pulling out the Lossnay cores, be sure the motor cable not
to be hooked. Otherwise, it might damage the motor, PCB and
Lossnay cores.
CAUTION
• Do not forcibly pull out the Lossnay cores while the motor
lead is hooked. The lead may be disconnected.
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.
Maintenance cover
for the other parts
Inner cover
Cable clamp
Motor cable
Lossnay core
Vacuum cleaner
Air lter

Eng-6
2) Lossnay cores
1. Use a vacuum cleaner to suck up the dust and dirt on the
exposed surfaces of the Lossnay cores.
2. Put the Lossnay core in a suitable vessel (e. g. a small tub or the
shower tray) and rinse the Lossnay core with clear water from all
sides.
3. Carefully clean the air inlets and housing thoroughly with a broad
soft brush.
4. Rinse the Lossnay core from all sides thoroughly with clear water.
5. Lift the Lossnay core from the vessel and remove the remaining
water inside the Lossnay core by rotating the Lossnay core
repeatedly.
6. Dry the Lossnay core with a dry cloth and put it back into the
ventilation unit. Operate the unit at least one day for drying inside
the core.
CAUTION
• Do not use the hard nozzle of the vacuum cleaner. It may
damage the exposed surfaces of the Lossnay cores.
• Do not wash with detergent or disinfect with solution. It may
damage the Lossnay cores.
3) Drain pan
1. Refer to 4.1 Removing the parts, and remove the air lters and
Lossnay cores.
2. Remove dirt on the drain pan, and water and dust adhered
around the drain discharge holes with a soft cloth.
CAUTION
• To prevent the materials from deteriorating, do not use paint
thinner, benzene, toluene and other solvents, detergents, or
nylon scrubbing brushes for cleaning.
• When oil or the like is adhering, wash it o󰀨 with lots of water.
If the drain pan is particularly dirty, wash it with warm water
(40˚C or less).
• When wiping the drain pan for cleaning, do not apply load to
the parts other than the core rail part. If a load is applied to
the drain pan, it can be damaged, resulting in water leakage.
• After cleaning, do not leave anything including cleaning
clothes or tools on the drain pan.
Vacuum cleaner (with
brush attachment)
Drain pan Check for dirt and dust that likely
causes the drain discharge hole
clogging on both the air supply and
exhaust sides, and then wipe and
clean the drain pan.
Core rail part
4) Backow stopper
1. Refer to 4.1 Removing the parts, and remove the air lters and
Lossnay cores.
2. After cleaning the drain pan, remove dirt accumulated in the
backow stoppers with a soft cloth or the like. Besides that,
remove dust if it clogged the backow stoppers.
3. To remove clogging of the backow stoppers, insert a cotton
swab or the like into the drain discharge holes. From the side
of the drain catch basin, check that the cotton swab is passing
through the backow stoppers.
CAUTION
• To prevent the materials from deteriorating, do not use paint
thinner, benzene, toluene and other solvents, detergents, or
nylon scrubbing brushes for cleaning.
• Pay attention not to damage the backow stoppers and drain
catch basin with the cotton swab. Besides that, if the cotton
swab is short, it can be dropped into the drain discharge
holes, and it can not be taken out from there.
• After cleaning, pour approximately 500 ml of water into both
the drain discharge holes to check that water can be drained
properly. When pouring water, pay attention not to splash
water inside the product, and be sure to wipe o󰀨 all puddles
after the work.
• After cleaning, do not leave anything including cleaning
clothes or tools on the drain pan.
• If the drain discharge holes are still clogged after the
cleaning, the backow stoppers must be replaced. If the
product is continuously used, it may cause defective water
drainage, resulting in water leakage. Be sure to contact the
dealer from whom you purchased the product.
4.3 Assembly after maintenance
Bearing in mind the above points, assemble the parts following the
sequence for their removal in reverse.
Drain pan
Drain discharge holes (Backow stopper positions)
Wipe o󰀨 dirt and dust on both the air supply and
exhaust sides.
Cotton swab
Backow stoppers
From the side of the drain catch basin, check
that the cotton swab is able to pass through both
backow stoppers. Make sure that a passage is
obtained through the backow stoppers.
Drain catch basin

Eng-7
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-50RVS-E 190 500 139 150 87 33 55
LGH-80RVS-E 325 800 222 170 82 36 63
LGH-100RVS-E 445 1000 278 190 82 37 73
* The above values apply during Lossnay ventilation when the fan speed is set to Fan speed 4 at the rating pressure loss and 230 V / 50 Hz.
* 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.
* Mitsubishi Electric measures products according to ISO 16494:2014, therefore P-Q curves are measured by chamber method.
* 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.
- Water leakage due to clogging of drain pipe
- 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
- Backow stopper
- 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