Precautions for Safety
• Carefully read Owner's Manual before starting the Air to Air Heat Exchanger. There are many important things to
keep in mind for daily operation.
• Ask for installation to be performed by the dealer or a professional. Only a qualified installer (*1) is able to install an
Air to Air Heat Exchanger. If a non-qualified person installs an Air to Air Heat Exchanger, it may result in problems
such as fire, electric shock, injury, water leakage, noise and vibration.
Transportation and storage
• When transporting the Air to Air Heat Exchanger, wear shoes with protective toe caps, protective gloves, and other
• When transporting the Air to Air Heat Exchanger, do not take hold of the bands around the packing carton. You may
injure yourself if the bands should break.
• When stacking the packing cartons for storage or transportation, heed the precautions written on the packing cartons.
Failure to heed the precautions may cause the stack to collapse.
• The Air to Air Heat Exchanger should be transported in stable condition. If any part of the product broken, contact
• Use a hand track or forklift to carry the unit. When carrying it by human power, have four persons or more; otherwise,
you may strain your back.
• Only a qualified installer(*1) or qualified service person(*1) is allowed to carry out the electrical work of the Air to Air
Heat Exchanger. Under no circumstances must this work be done by an unqualified individual since failure to carry
out the work properly may result in electric shocks and/or electrical leaks.
• After the installation work has been completed, have the installer explain about the circuit breaker positions. In the
event that trouble has occurred in the Air to Air Heat Exchanger, set the circuit breaker to the OFF position, and
contact a service person.
• Do not install the Air to Air Heat Exchanger in a location that may be subject to a risk of expire to a combustible gas.
If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.
• Use the company-specified products for the separately purchased parts. Use of non-specified products may result in
fire, electric shock, water leakage or other trouble. Have the installation performed by a professional.
• Confirm that earthing is performed correctly.
• Before opening the electrical control cover or inspection cover of the Air to Air Heat Exchanger, set the circuit breaker
to the OFF position. Failure to set the circuit breaker to the OFF position may result in electric shocks through contact
with the interior parts. Only a qualified installer(*1) or qualified service person(*1) is allowed to remove the electrical
control cover or inspection cover of the Air to Air Heat Exchanger and do the work required.
• Inside the Air to Air Heat Exchanger are high-voltage areas and rotating parts. Due to the danger of electric shocks
or of your fingers or physical objects becoming trapped in the rotating parts, do not remove the electrical control cover
or inspection cover of the Air to Air Heat Exchanger. When work involving the removal of these parts is required,
contact a qualified installer or a qualified service person.
• Do not move or repair any unit by yourself. Since there is high voltage inside the unit, you may get electric shock
when removing the cover and main unit.
• Use of a stand more than 50 cm high to clean the filter or heat exchange element of the Air to Air Heat Exchanger or
to carry out other such jobs constitutes working at heights. Due to the danger of falling off the stand and injuring
yourself while working at heights, this kind of work should not be done by unqualified individuals. When this kind of
work must be carried out, do not do it yourself but ask a qualified installer or a qualified service person to do it for you.
• Do not place any combustion appliance in a place where it is directly exposed to the wind of Air to Air Heat Exchanger,
otherwise it may cause imperfect combustion.
• Do not insert your finger or a stick into the air intake or outlet.
Doing so may result injury as the fan is rotating at high speed inside the unit.
• When you have noticed that some kind of trouble (such as when an error display has appeared, there is a smell of
burning, abnormal sounds are heard, water is leaking) has occurred in the Air to Air Heat Exchanger, do not touch
the Air to Air Heat Exchanger yourself but set the circuit breaker to the OFF position, and contact a qualified service
person. Take steps to ensure that the power will not be turned on (by marking "out of service" near the circuit breaker,
for instance) until qualified service person arrives. Continuing to use the Air to Air Heat Exchanger in the trouble
status may cause mechanical problems to escalate or result in electric shocks or other trouble.