Mitsubishi Electric LGH-50RVS-E Installation Instructions Manual page 3

CAUTION
Incorrect handling could cause injury or damage to property or household effects.
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 flames, or in environment with
combustible fumes.
It could cause fire.
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.
Prohibited
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 affect choking of the drain pipe. In that case, choose hoods or louvers which
have repellent net.
It could cause water leakage.
Put on gloves during installation.
It could cause injury.
Make sure the power supply isolator is turned off when Lossnay is not used for a long period of time after the
installation.
It could cause electric shock, power leakage, or fire as a result of deteriorated insulation.
Always use the specified suspension bolts, nuts and washers or correctly rated wire / chain hangers.
Use of hardware with insufficient 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, fire, or damage to household property.)
The control box cover must be closed after the installation.
Dust or humidity may cause power leakage or fire.
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 fire, 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 flow is maximum or
minimum, and set Lossnay inlet air temperature to 2 - 13˚C.
Otherwise it could fall the supply fan into intermittent operation.
The instructions
Install the duct heater separated from the product by a distance of 2 m or more.
given must be
Failure to do so may result in fire or equipment damage due to the transmission of residual heat from the heater.
followed.
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 flow side.
It may cause drain over flow 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 difference 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-3