Mitsubishi Electric Fresh Master GUF-50RDH4 Installation Instructions Manual page 4

- Do not place a burning appliance in a place
where it is exposed directly to the air from the
Fresh Master.
- It could cause an accident as a result of incom-
plete 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
Prohibited
as acidic gases, alkaline gases, organic sol-
vent 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.
- When using the product where it is exposed to high temperatures
and humidity (40˚C) or higher, RH 80% or higher), or where fog
occurs frequently, moisture is likely to condense in the core, and may
result in condensation build up in the unit. The product should not be
used under such conditions.
- Outdoor air may enter the Fresh Master owing to the pressure
difference between indoor and outdoor or external winds even
when the product is not operated. It is recommended to install an
Electrically operated damper to block the outdoor air.
- In a cold weather area, an area with strong external winds or where
fog occurs frequently, cold outdoor air, external winds or fog may
be introduced into the product when its operation is stopped. It is
recommended to install an electrically operated damper.
Before operating the unit, make sure you read all
the "Safety precautions".
"Safety precautions" lists important points about
safety. Please be sure to follow them.
Symbols used in the text
Warning:
Describes precautions that should be observed to avoid the
risk of injury or death to the user.
Caution:
Describes precautions that should be observed to prevent dam-
age to the unit.
Symbols used in the illustrations
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Beware of electric shock. (This symbol is displayed on the
main unit label.) <Colour: Yellow>
Warning:
Carefully read the labels affixed to the main unit.
CAUTION
- Put on gloves during installation.
- It could cause injury.
- Make sure the power supply isolator is turned off on
the power distribution panel when Fresh Master 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 and 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
The instructions
given must be
or more) down toward the outdoor louvres from
followed.
Fresh Master, 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 (electrically
operated damper, lamp, monitoring unit, etc.) using
output signals of the Fresh Master, make sure to
install safety equipment for the external devices.
- It could cause fire, damage, etc. without safety equipment.
CAUTION
- When using the product in an environment where there is a window,
or opening near the outdoor louvre , where insects are likely to
gather around the interior or exterior light , take note that small
insects may intrude into the product.
- In a cold weather area, or others, 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, even if they are within the range of operating conditions.
Make sure to confirm the operating conditions and other precautions,
and do not use the product if dewing or freezing is anticipated.
* Example of dewing condition - Outdoor air: -5˚C or lower, dew-point
temperature at installation place: 10˚C or higher (When the indoor temperature
is 22˚C or higher with the relative humidity higher than 50%, or other)
1.1. Installation
After you have read this manual, keep it and the Installation
Manual in a safe place for easy reference whenever a question
arises. If the unit is going to be operated by another person,
make sure that this manual is given to him or her.
Warning:
- Never charge any types of refrigerant other than those speci-
fied by Mitsubishi Electric. Failure to follow this warning may
result in violation of law, or blowout, explosion or fire when
the product is used, serviced, or disposed of. The types of
refrigerant that can be used are specified in the manual sup-
plied with the product or on the product nameplate. Mitsubi-
shi Electric shall assume no liability for any damage, break-
down, malfunction, or accident resulting from the charging of
a refrigerant not specified by Mitsubishi Electric.
- The unit should not be installed by the user. Ask the dealer
or an authorized company to install the unit. If the unit is
installed improperly, water leakage, electric shock or fire may
result.
- Use only accessories authorized by Mitsubishi Electric and
ask your dealer or an authorized company to install them. If
accessories are installed improperly, water leakage, electric
shock or fire may result.
- The Installation Manual details the suggested installation
method. Any structural alteration necessary for installation
must comply with local building code requirements.
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