Mitsubishi Electric LGH-50RVS-E User manual

Eng-1
English
MODELS:
Lossnay Heat Recovery Ventilator
LGH-50RVS-E
LGH-80RVS-E
LGH-100RVS-E
Installation Instructions
For use by dealer/contractor
This product needs to be installed properly in order to ensure
maximum functionality as well as safety.
Please be sure to read this installation manual before starting the
installation.
lInstallation must be performed by a dealer or installation contractor.
Please note that improper installation may cause malfunction or
accident.
“Operating Instructions” and this manual must be handed over to
the customer after completing the installation.
Contents
1. Safety precautions...........................................2
2. Outline drawings..............................................5
3. Standard installation examples........................6
4. Installation method ..........................................7
4.1 Hanging the Lossnay unit...........................7
4.2 Duct works .................................................8
4.3 Drain pipe work ..........................................9
4.4 Electrical installation.................................10
5. Function settings ...........................................17
6. Check points after installation work...............29
7. Trial operation................................................30
2105876H63801

Eng-2
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.
Do not disassemble
Do not modify or disassemble.
It could cause re, electric shock or injury.
Prohibition of use
in bath or shower
room
The Lossnay unit and remote controller should not be installed where it is highly humid, like a bathroom, or other wet place.
It could cause electric shock or power leakage.
The surrounding air condition of the unit shall be between 0 and 40˚C, and the dew point of the ambient air shall be
lower than 11˚C in winter (e.g. 20˚C 56%RH or less).
It could cause electric shock, power leakage or water leakage.
Connect the
grounding wire.
Connect the product properly to ground.
Malfunctioning or power leaks can cause electrical shock.
The instructions
given must be
followed.
Use the specied power supply and voltage.
Use of incorrect power supply or voltage could cause re or electric shock.
Select a place with su󰀩cient strength and install the main unit securely.
It could cause injury or death.
Wiring work must be performed by qualied professionals, and be implemented safely and securely in accordance
with appropriate standards and regulations.
Poor connection or improper wiring work could cause electric shock or re.
Make sure to install an all-pole electric leakage isolator securely. All supply circuits must be disconnected before
obtaining access to the terminal devices. Use the specied cable size and connect the cables securely to prevent
disconnection when they are pulled.
If there is a defect in the connection, there is a possibility of re.
Select an adequate place for the opening to introduce outdoor air, where it will not intake the exhaust fumes like
combustion gas, or others, and there is no risk of blockage.
Shortage of fresh air could put the room in a state of oxygen deciency.
A duct made of steel must be installed with care not to be connected electrically with metal, wire, stainless steel
plate, or others.
It could cause re when power leakage occurs.
It is prohibited to use the unit where salt, sulphur or hot spring steam damage is expected.
It could cause re, electric shock or injury.
Do not touch the product for at least 5 minutes after the power is shut o󰀨.
It could cause electric shock.

Eng-3
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 air from the Lossnay unit.
It could cause an accident as a result of incomplete combustion.
Do not use at a place where it is exposed to high temperatures (40˚C or higher), naked ames, or in environment with
combustible 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 cause malfunction.
Do not install this product in a place where it is exposed to ultraviolet light.
UV may damage covering insulation.
Do not install any booster fan to the downstream side of the fan of the product.
Avoid to install air inlets and outlets where insects are likely to gather like a place near interior or exterior lights. They
could be intrude inside the unit and a󰀨ect choking of the drain pipe. In that case, choose hoods or louvers which
have repellent net.
It could cause water leakage.
The instructions
given must be
followed.
Put on gloves during installation.
It could cause injury.
Make sure the power supply isolator is turned o󰀨 when Lossnay is not used for a long period of time after the
installation.
It could cause electric shock, power leakage, or re as a result of deteriorated insulation.
Always use the specied suspension bolts, nuts and washers or correctly rated wire / chain hangers.
Use of hardware with insu󰀩cient strength could result in the product dropping.
The outside ducts must be tilted at a gradient (1/30 or more) down toward the outdoor louvres from Lossnay, and
properly insulated.
The entry of rain water may cause power leakage, re, or damage to household property.)
The control box cover must be closed after the installation.
Dust or humidity may cause power leakage or re.
When connecting external devices (electric heater, damper, lamp, monitoring unit, etc.) using output signals of the
Lossnay unit, make sure to install safety equipment for the external devices.
It could cause re, damage, etc. without safety equipment.
When using this unit in the area where the outdoor temperature often becomes lower than 0˚C, a pre-heater is
recommended to install at OA duct.
Select a duct heater in compliance with local and national laws, regulations, and standards.
Choose a OA pre-heater which can control the heater outlet air temperature even both the air ow is maximum or
minimum, and set Lossnay inlet air temperature to 2 - 13˚C.
Otherwise it could fall the supply fan into intermittent operation.
Install the duct heater separated from the product by a distance of 2 m or more.
Failure to do so may result in re or equipment damage due to the transmission of residual heat from the heater.
The absolute humidity of RA shall be lower than 0.0139kg/kg(DA) in winter and the relative humidity of RA shall be
lower than 90%RH through the year.
* Examples of the absolute humidity 0.0139kg/kg(DA) are 20.7˚C 90%RH, 25˚C 70%, 30˚C 50% etc.
The unit shall be installed horizontally. The tolerance is ±0.5°.
Do not put positive pressure on the drain pipe from drain out ow side.
It may cause drain over ow from the unit.
Install weather louver or "Weather cover" for OA inlet & EA outlet to prevent rainwater from entering the Lossnay unit.
Ducts to outdoor (OA and EA) shall decline by 1/30 or more downward to outdoor.
Make sure to install all accessaries for drain work and decline 1/100 for drain pipe.
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.
In cold area or strong wind area, outdoor air may enter the unit because of the pressure di󰀨erence or external wind
even when the unit stops. It is recommended to install an electrically operated damper to block outdoor air in such
cases.
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.

Eng-4
CAUTION Incorrect handling could cause injury or damage to property or household e󰀨ects.
The instructions
given must be
followed.
In cold weather areas, even if they are within the range of operating conditions, dewing or freezing could occur on
the main unit, where the duct is connected, or other sections, depending on the conditions of outdoor air and indoor
temperature and moisture. Make sure to check the operating conditions and other precautions, and do not use the
product if dewing or freezing is anticipated.
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-5
2. Outline drawings
Accessory parts
Screws x16 Duct connecting anges x4 Slim-Lossnay connection cable (gray: two wires) x1
Special screws x4 Backow stopper x2 Stopper holder x1 Drain catch basin x1
Unit (mm)
Model Dimensions Ceiling suspension
xture pitch
Nominal
diameter
Duct connecting ange Duct pitch Weight
(kg)
Weight with
maximum drain water
A B C D E F G H J K L
LGH-50RVS-E 974 946 969 1001 32 200 192 208 83 692 127 120 55 67
LGH-80RVS-E 1185 997 1179 1051 55 250 242 258 82 683 157 161 63 77
LGH-100RVS-E 1185 1224 1179 1279 55 250 242 258 82 910 157 161 73 89
EA
(exhaust air outlet)
Air exhaust fan
OA
(outside air intake)
Heat exchanger, Air
lter, High-E󰀩ciency
lter, Fan, Drain pan
maintenance space
More than 600
Air lters
Heat exchanger
(Lossnay core)
In the case of xed ceiling (not grid ceiling),
150 mm or more for drain maintenance
Inspection
opening
450 x 450
or more
Control box
Maintenance cover for lters (Upper)
Maintenance cover for the other parts (Lower)
Air supply fan
RA
(return air)
SA
(supply air)
By-pass damper plate
High-E󰀩ciency lter (sold separately) position
Ceiling suspension xture (4-13 X 20 oval)
Power supply opening
150 to 250
Alternative duct position
Drain catch basin
Backow stopper
Ceiling
O.D φ32