– 3 –
Air to Air Heat Exchanger with DX Coil Unit
Installation Manual
Air to Air Heat Exchanger with DX Coil Unit
Installation Manual
• Do not install the unit in a machinery factory or a chemical plant, where a toxic gas containing acid, alkali, an organic
solvent, or paint, or a gas containing a corrosive substance is generated. Gas poisoning or a fire may result.
• Do not install in a location where flammable gas may leaks are possible. If the gas leak and accumulate around the
unit, it may ignite and cause a fire.
• Install the unit so that the air discharge is located at least 1.5 m from the nearest fire alarm. Otherwise, when a fire
occurs, the fire alarm may be late to detect it, or may not detect it at all.
Installation
• Transport it by the truck or the forklift. Transport it by six people or more when the person transports it temporarily.
The waist etc. might be hurt when not following it.
• When transporting the Air to Air Heat Exchanger with DX Coil Unit, wear shoes with additional protective toe caps,
protective gloves, and other protective clothing.
• When transporting the Air to Air Heat Exchanger with DX Coil Unit, do not take hold of the bands around the packing
carton. You may injure yourself if the bands should break.
• When the Air to Air Heat Exchanger with DX Coil Unit is to be suspended, the designated hanging bolts (M12) and
nuts (M12) must be used
• Install the Air to Air Heat Exchanger with DX Coil Unit at enough strong place to withstand the weight of the unit. If
the strength is not enough, the unit may fall down resulting in injury
• Follow the instructions in the Installation Manual to install the Air to Air Heat Exchanger with DX Coil Unit. Failure to
follow these instructions may cause the product to fall down or topple over or give rise to noise, vibration, water
leakage, etc.
• Wear protective gloves and safety work clothing during installation, servicing and removal.
• Do not touch the aluminum fin of the Air to Air Heat Exchanger with DX Coil Unit or outdoor unit. You may injure
yourself if you do so. If the fin must be touched for some reason, first put on protective gloves and safety work
clothing, and then proceed.
• Tighten the flare nut with a torque wrench in the specified manner. Excessive tighten of the flare nut may cause a
crack in the flare nut after a long period, which may result in refrigerant leakage.
• When working at heights, put a sign in place so that no-one will approach the work location, before proceeding with
the work. Parts and other objects may fall from above, possibly injuring a person below.
• Before starting to install the Air to Air Heat Exchanger with DX Coil Unit, read carefully through the Installation
Manual, and follow its instructions to install the Air to Air Heat Exchanger with DX Coil Unit.
• Only a qualified installer (*1) or qualified service person (*1) is allowed to install the Air to Air Heat Exchanger with
DX Coil Unit. If the Air to Air Heat Exchanger with DX Coil Unit is installed by an unqualified individual, a fire, electric
shocks, injury, water leakage, noise and / or vibration may result.
• Upon completion of the installation work, check for the insulation resistance. Then conduct a test run to check that
the Air to Air Heat Exchanger with DX Coil Unit is operating properly.
• After the work has finished, be sure to use an insulation tester set (500V Megger) to check the resistance is 1M
Ω
or
more between the charge section and the non-charge metal section (Earth section). If the resistance value is low, a
disaster such as a leak or electric shock is caused at user's side.
• Before starting to install the Air to Air Heat Exchanger with DX Coil Unit, read carefully through the Installation
Manual, and follow its instructions to install the Air to Air Heat Exchanger with DX Coil Unit.
• Follow the instructions in the Installation Manual to install the Air to Air Heat Exchanger with DX Coil Unit. Failure to
follow these instructions may cause the product to fall down or topple over or give rise to noise, vibration, water
leakage, etc.
• Before operating the Air to Air Heat Exchanger with DX Coil Unit after having completed the work, check that the
electrical control cover, inspection cover and maintenance cover are closed, and set the circuit breaker to the ON
position. You may receive an electric shock if the power is turned on without first conducting these checks.
• Install the unit in the prescribed manner for protection against strong wind and earthquake. Incorrect installation may
result in the unit falling down, or other accidents.
• Attach an anti bird net or the like to the outside air intake. Remove any foreign object such as a nest; otherwise, an
oxygen shortage may occur in the room.
• Leave ample space between the outside air intake and the outlet for combustion gas. Otherwise, an oxygen shortage
may occur in the room.
• When metallic ducts pass through a wooden construction covered with a metal lath, wire lath, or metal plate, install
the ducts so that they are not electrically in contact with the metal parts of wooden construction. If a short circuit
occurs, a fire may result.
• Use the supplied or specified parts for installation. Otherwise, the unit falling down, water leakage, an electric shock,
or a fire may result.
• Perform anti-freezing work if the installation place is subject to freezing. Otherwise, the solenoid valve or pipes are
damaged and water leakage may result.
• Do not install the unit in a place where the outside temperature (especially around the unit or the air grill) falls below
0 °C. Otherwise, water in the pipes, in the humidifying element, or in the solenoid valve freezes and a breakdown or
water leakage may result.
• If the ducts pass through a fire protection zone, use a noncombustible duct and install a fire damper. The flame may
spread when a fire occurs.
• Install the ducts to the outside inclined downward so that rainwater does not enter the ducts. Otherwise, water will
enter the room and household goods will become wet.
• Insulate the ducts from heat using a heat insulator to prevent condensation. Otherwise, furniture may be damaged.
• If it is hot and humid in the ceiling cavity, install a ventilator. Otherwise, a fire or a short circuit may result.
• Install drain pipes to drain water securely referring to the Installation Manual. In addition, insulate the pipes from heat
to prevent condensation. Inappropriate piping results in water leaking into the room and the ceiling, floor or furniture
may be damaged.
Explanations given to user
• After the installation work, Follow the Owner's manual to explain to the customer how to use and maintain the unit.
• Do not place any combustion appliance in a place where it is directly exposed to the wind of Air to Air Heat Exchanger
with DX Coil Unit, otherwise it may cause imperfect combustion.
• For safety, turn off the unit if you do not use it for a long time. A fire or an electric shock may result due to insulation
degradation.
Relocation
• Only a qualified installer (*1) or qualified service person (*1) is allowed to relocate the Air to Air Heat Exchanger with
DX Coil Unit. It is dangerous for the Air to Air Heat Exchanger with DX Coil Unit to be relocated by an unqualified
individual since a fire, electric shocks, injury, water leakage, noise and / or vibration may result.
• For the refrigerant recovery work (collection of refrigerant from the pipe to the compressor), stop the compressor
before disconnecting the refrigerant pipe. If the refrigerant pipe is disconnected while the compressor is working with
the valve open, the compressor sucks air and the refrigeration cycle is overpressurized, which may cause a burst or
injury.
Refrigerant piping
• Install the refrigerant pipe securely during the installation work before operating the compressor. If the compressor is
operated with the valve open and without refrigerant pipe, the compressor sucks air and the refrigeration cycles is
over pressurized, which may cause a injury.
• Do not use any refrigerant different from the one specified for complement or replacement. Otherwise, abnormally
high pressure may be generated in the refrigeration cycle, which may result in a failure or explosion of the product or
an injury to your body.
• Only a qualified installer(*1) or qualified service person(*1) is allowed to do installation work. If installation is carried
out by an unqualified individual, a fire, electric shocks, injury, water leakage, noise and / or vibration may result.
Electrical wiring
• Use wiring that meets the specifications in the Installation Manual and the stipulations in the local regulations and
laws. Use of wiring which does not meet the specifications may give rise to electric shocks, electrical leakage,
smoking and / or a fire.
• Be sure to connect earth wire. (Grounding work)
• Incomplete earthing cause an electric shock.
• Do not connect earth wires to gas pipes, water pipes, lightning rods or earth wires for telephone wires
• After completing the repair or relocation work, check that the earth wires are connected properly.
• Install a circuit breaker that meets the specifications in the installation manual and the stipulations in the local
regulations and laws.
• Install the circuit breaker where it can be easily accessed by the agent.
• When installing the circuit breaker outdoors, install one which is designed to be used outdoors.
• 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, the Air to Air Heat Exchanger with DX Coil Unit falls to cool or heat, or water is
leaking) has occurred in the Air to Air Heat Exchanger with DX Coil Unit, do not touch the Air to Air Heat Exchanger
with DX Coil Unit yourself but set the circuit breaker to the OFF position, and contact a qualified service person (*1).
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 with DX Coil Unit in
the trouble status may cause mechanical problems to escalate or result in electric shocks, etc.
• Upon completion of the installation work, tell the user where the circuit breaker is located. If the user does not know
where the circuit breaker is, he or she will not be able to turn it off in the event that trouble has occurred in the Air to
Air Heat Exchanger with DX Coil Unit.
• Use the rated voltage. Otherwise, a fire or an electric shock may result.
• Connect power cords or connection wires securely so that the power supply cover is attached properly. Otherwise,
a fire or an electric shock may result.
• Do not install the unit or the switch in a humid place such as a bathroom. Otherwise, a fire or an electric shock may
result.
(*1) Refer to the “Definition of Qualified Installer or Qualified Service Person.”
5-EN
6-EN
+00ET99805001-2.book Page 3 Tuesday, July 26, 2011 1:39 PM
