En-
1-2. SPECIFICATIONS
1. BEFORE INSTALLATION
1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
• Be sure to read “THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY” before installing the air conditioner.
• Be sure to observe the warnings and cautions specified here as they include important items related to safety.
• After reading this manual, be sure to keep it together with the OPERATING INSTRUCTIONS for future reference.
Required Tools for Installation
Phillips screwdriver
Level
Scale
Utility knife or scissors
Torque wrench
Wrench (or spanner)
5/32 in. (4 mm) hexagonal
wrench
Flare tool for R40A
Gauge manifold for R40A
Vacuum pump for R40A
Charge hose for R40A
Pipe cutter with reamer
ENGLISH
CONTENTS
. BEFORE INSTALLATION ............................................................
2. OUTDOOR UNIT INSTALLATION ...............................................3
3. FLARING WORK AND PIPE CONNECTION ...............................5
4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN ......... 5
5. PUMPING DOWN ........................................................................7
Model
Power supply
Pipe length and height difference *, *2, *3, *4, *5, *6
Rated Voltage
Frequency Max. pipe length per indoor
unit / for multi-system
Max. height difference *7
Max. no. of bends per
indoor unit / for multi system Refrigerant adjustment A *8
MXZ-5B42NA
208 / 230 V
60 Hz
82 ft (25 m) / 262 ft (80 m)
49 ft (5 m)
25 / 80
.08 oz each 5 ft (20 g/m)
*1 Never use pipes with thickness less than specified. The pressure resist
-
ance will be insufficient.
*2 Use a copper pipe or a copper-alloy seamless pipe.
*3 Be careful not to crush or bend the pipe during pipe bending.
*4 Refrigerant pipe bending radius must be 4 in. (00 mm) or more.
*5 Insulation material : Heat resisting foam plastic 0.045 specific gravity
*6 Be sure to use the insulation of specified thickness. Excessive thickness
may cause incorrect installation of the indoor unit and insufficient thickness
may cause dew drippage.
*7 If the outdoor unit is installed higher than the indoor unit, max. height differ-
ence is reduced to 33 ft (0 m).
*8 If pipe length exceeds 97 ft (60 m), additional refrigerant (R40A) charge
is required. (No additional charge is required for pipe length less than
97 ft (60 m).)
Additional refrigerant (ft) = A × (pipe length (ft) - 97)
5
Additional refrigerant (m) = A × (pipe length (m) - 60)
n
Do not install the unit by yourself (user).
Incomplete installation could cause fire or electric shock, injury due to the unit
falling, or leakage of water. Consult the dealer from whom you purchased the
unit or a qualified installer.
n
Follow the instructions detailed in the installation manual.
Incomplete installation could cause fire or electric shock, injury due to the unit
falling, or leakage of water.
n
When installing the unit, use appropriate protective equipment and tools
for safety.
Failure to do so could cause injury.
n
Install the unit securely in a place that can bear the weight of the unit.
If the installation location cannot bear the weight of the unit, the unit could fall
causing injury.
n
Perform electrical work according to the installation manual and be sure
to use an exclusive circuit. Do not connect other electrical appliances to
the circuit.
If the capacity of the power circuit is insufficient or there is incomplete electrical
work, it could result in a fire or an electric shock.
n
Ground the unit correctly.
Do not connect the ground wire to a gas pipe, water pipe, lightning rod or
telephone ground. Defective grounding could cause electric shock.
n
Do not damage the wires.
Damaged wires could cause fire.
n
Be sure to shut off the main power when setting up the indoor P.C. board
or wiring.
Failure to do so could cause electric shock.
n
Use the specified wires to securely connect the indoor and outdoor units.
Attach the wires firmly to avoid applying stress to the terminal block.
Improper connection could cause fire.
n
Do not install the unit in a place where flammable gas may leak.
If gas leaks and accumulates around the unit, it could cause an explosion.
n
Do not use intermediate connection of the power cord or the extension
cord.Do not connect many devices to one AC outlet.
It could cause a fire or an electric shock.
n
Use the parts provided or specified parts for the installation work.
The use of defective parts could cause an injury or leakage of water due to a
fire, an electric shock, the unit falling, etc.
n
When plugging the power supply plug into the outlet, make sure that there
is no dust, blockage, or loose parts both in the outlet and on the plug.
Verify that the power supply plug is completely in the outlet.
If there is dust, blockage, or loose parts on the power supply plug or the outlet,
it could cause electric shock or fire. If loose parts are found on the power supply
plug, replace it.
n
Securely attach the electrical cover to the indoor unit and the service
panel to the outdoor unit.
If the electrical cover of the indoor unit and/or the service panel of the outdoor
unit are not attached securely, dust, water, etc. could collect in the unit and
could cause a fire or an electric shock.
n
When installing, relocating, or servicing the unit, make sure that no sub-
stance other than the specified refrigerant (R410A) enters the refrigerant
circuit.
Any presence of foreign substance such as air can cause abnormal pressure
rise and may result in explosion or injury. The use of any refrigerant other than
that specified for the system will cause mechanical failure, system malfunction,
or unit breakdown. In the worst case, this could lead to a serious impediment
to securing product safety.
n
Do not discharge the refrigerant into the atmosphere. Check that the
refrigerant gas does not leak after installation has been completed. If
refrigerant leaks during installation, ventilate the room.
If refrigerant comes in contact with a fire, harmful gas could be generated.
If refrigerant gas leaks indoors, and comes into contact with the flame of a fan
heater, space heater, stove, etc., harmful gases will be generated.
n
Use appropriate tools and piping materials for installation.
The pressure of R40A is .6 times higher than R22. Not using the appropri-
ate tools and materials, or improper installation could cause the pipes to burst
causing an injury.
n
When pumping down the refrigerant, stop the compressor before discon-
necting the refrigerant pipes.
If the refrigerant pipes are disconnected while the compressor is running and
the stop valve is open, air could be drawn in and the pressure in the refrigera
-
tion cycle could become abnormally high, causing the pipes to burst.
n
When installing the unit, securely connect the refrigerant pipes before
starting the compressor.
If the compressor is started before the refrigerant pipes are connected and the
stop valve is open, air could be drawn in and the pressure in the refrigeration
cycle could become abnormally high, causing the pipes to burst.
n
Fasten a flare nut with a torque wrench as specified in this manual.
If fastened too tight, a flare nut could break and cause refrigerant leakage.
n
Install the unit according to national wiring regulations.
n
Depending on the installation area, install a Ground Fault Interrupt (GFI)
circuit breaker.
If the Ground Fault Interrupt (GFI) circuit breaker is not installed, an electric
shock could occur.
n
Perform the drainage/piping work securely according to the installation
manual.
If there is defect in the drainage/piping work, water could drip from the unit,
and damage household items.
n
Do not touch the air inlet or the aluminum fins of the outdoor unit.
This could cause injury.
n
Do not install the outdoor unit where small animals may live.
If small animals enter the unit and damage its electrical parts, it could cause a
malfunction, smoke emission, or fire. Keep the area around the unit clean.
CAUTION
(Could lead to serious injury when operated incorrectly.)
WARNING
(Could lead to death or serious injury, etc.)
JG79A337H02_en.indd 1
2013/04/23 (火) 午後 2:55:52
