Panasonic WU-144MF1U9E 3-Way Service Manual - Page 2

Important!, Special Precautions

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IMPORTANT! Please Read Before Starting This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently. For safe installation and trouble-free operation, you must: Carefully read this instruction booklet before beginning. Follow each installation or repair step exactly as shown. Observe all local, state, and national electrical codes. Pay close attention to all warning and caution notices given in this manual. WARNING This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death. CAUTION This symbol refers to a hazard or unsafe practice which can result in personal injury or product or property damage. If Necessary, Get Help These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions. In Case of Improper Installation The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to follow the instructions in this document. SPECIAL PRECAUTIONS WARNING When Wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM. • Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked. • Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death. • Ground the unit following local electrical codes. • Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard. • To prevent possible hazards from insulation failure, the unit must be grounded. When Transporting Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers. When Installing... Select an installation location which is rigid and strong enough to support or hold the unit, and select a location for easy maintenance. ...In a Room Properly insulate any tubing run inside a room to prevent "sweating" that can cause dripping and water damage to walls and floors. CAUTION Keep the fire alarm and the air outlet at least 5 feet away from the unit. ...In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration. ...In an Area with High Winds Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle. ...In a Snowy Area (for Heat Pump-type Systems) Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents. When Connecting Refrigerant Tubing • Ventilate the room well, in the event that is refrigerant gas leaks during the installation. Be careful not to allow contact of the refrigerant gas with a flame as this will cause the generation of poisonous gas. • Keep all tubing runs as short as possible. • Use the flare method for connecting tubing. • Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection. • Check carefully for leaks before starting the test run. WARNING • When performing piping work do not mix air except for specified refrigerant (R410A) in refrigeration cycle. It causes capacity down, and risk of explosion and injury due to high tension inside the refrigerant cycle. • Refrigerant gas leakage may cause fire. • Do not add or replace refrigerant other than specified type. It may cause product damage, burst and injury etc. • Do not leak refrigerant while piping work for an installation or re-installation, and while repairing refrigeration parts. Handle liquid refrigerant carefully as it may cause frostbite. i

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i
IMPORTANT!
Please Read Before Starting
This air conditioning system meets strict safety and
operating standards. As the installer or service person, it
is an important part of your job to install or service the
system so it operates safely and efficiently.
For safe installation and trouble-free operation, you
must:
Carefully read this instruction booklet before beginning.
Follow each installation or repair step exactly as shown.
Observe all local, state, and national electrical codes.
Pay close attention to all warning and caution notices
given in this manual.
WARNING
This symbol refers to a hazard or
unsafe practice which can result
in severe personal injury or death.
CAUTION
This symbol refers to a hazard or
unsafe practice which can result
in personal injury or product or
property damage.
If Necessary, Get Help
These instructions are all you need for most installation
sites and maintenance conditions. If you require help for a
special problem, contact our sales/service outlet or your
certified dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for
improper installation or maintenance service, including
failure to follow the instructions in this document.
SPECIAL PRECAUTIONS
WARNING
When Wiring
ELECTRICAL SHOCK CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
ONLY A QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD ATTEMPT TO
WIRE THIS SYSTEM.
Do not supply power to the unit until all wiring and tubing
•
•
are completed or reconnected and checked.
Highly dangerous electrical voltages are used in this
•
system. Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and
inadequate grounding can cause
accidental injury or
death
.
Ground the unit
following local electrical codes.
Connect all wiring tightly. Loose wiring may cause
•
overheating at connection points and a possible fire
hazard.
To prevent possible hazards from insulation failure,
•
the unit must be grounded.
When Transporting
Be careful when picking up and moving the indoor and
outdoor units. Get a partner to help, and bend your knees
when lifting to reduce strain on your back. Sharp edges or
thin aluminum fins on the air conditioner can cut your
fingers.
When Installing…
Select an installation location which is rigid and strong
enough to support or hold the unit, and select a location
for easy maintenance.
…In a Room
Properly insulate any tubing run inside a room to prevent
“sweating” that can cause dripping and water damage to
walls and floors.
CAUTION
Keep the fire alarm and the air
outlet at least 5 feet away from the
unit.
…In Moist or Uneven Locations
Use a raised concrete pad or concrete blocks to provide a
solid, level foundation for the outdoor unit. This prevents
water damage and abnormal vibration.
…In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a
metal frame. Provide a suitable air baffle.
…In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher
than drifting snow. Provide snow vents.
When Connecting Refrigerant Tubing
Ventilate the room well, in the event that is refrigerant
•
gas leaks during the installation. Be careful not to allow
contact of the refrigerant gas with a flame as this will
cause the generation of poisonous gas.
Keep all tubing runs as short as possible.
•
Use the flare method for connecting tubing.
•
Apply refrigerant lubricant to the matching surfaces of
•
the flare and union tubes before connecting them, then
tighten the nut with a torque wrench for a leak-free
connection.
Check carefully for leaks before starting the test run.
•
WARNING
When performing piping work do
•
not mix air except for specified
refrigerant (R410A) in refrigeration
cycle. It causes capacity down,
and risk of explosion and injury
due to high tension inside the
refrigerant cycle.
Refrigerant gas leakage may
•
cause fire.
Do not add or replace refrigerant
•
other than specified type. It may
cause product damage, burst and
injury etc.
Do not leak refrigerant while piping work for an
•
installation or re-installation, and while repairing
refrigeration parts.
Handle liquid refrigerant carefully as it may cause
frostbite.