E n-1
1-2. SPECIFICATIONS
1-1. THE FOLLOW ING SHOULD ALW AYS 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 arnings and cautions specified here as they include important items related to safety.
• After reading this manual, be sure to keep it together ith the OPERATING INSTRUCTIONS for future reference.
Required Tools for Installation
Phillips scre driver
Level
Scale
Utility knife or scissors
Torque w rench
W rench (or spanner)
5/32 in. (4 mm) hexagonal
w rench
Flare tool for R410A
Gauge manifold for R410A
Vacuum pump for R410A
Charge hose for R410A
Pipe cutter w ith reamer
ENGLISH
CONTENTS
1. BEFORE INSTALLATION
............................................................1
2. OUTDOOR UNI T I NSTALLATI ON ...............................................3
3. FLARING WORK AND PIPE CONNECTION
...............................5
4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN
......... 5
5. PUMPING DOWN
........................................................................7
Model
Pow er supply
Pipe length and height difference *1, *2, *3, *4, *5, *6, *8
Rated Voltage
Frequency Max. pipe length per indoor unit /
for multi-system
Max. height
difference
Max. no. of bends per indoor unit /
for multi system
Refrigerant
adjustment A *7
MXZ-2C20NA2
208 / 230 V
60 Hz
82 ft. (25 m) / 164 ft. (50 m)
49 ft. (15 m)
25 / 50
1.08 oz each 5 ft.
(20 g/m)
*1 Never use pipes ith thickness less than specified. The pressure resistance
ill 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. (100 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.
■
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 ater. Consult the dealer from hom you purchased the
unit or a qualified installer.
■
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 ater.
■
W hen installing the unit, use appropriate protective equipment and tools
for safety.
Failure to do so could cause injury.
■
Install the unit securely in a place that can bear the w eight of the unit.
I f the installation location cannot bear the w eight of the unit, the unit could fall
causing injury.
■
Perform electrical w ork 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 po er circuit is insufficient or there is incomplete electrical
ork, it could result in a fire or an electric shock.
■
Ground the unit correctly.
Do not connect the ground w ire to a gas pipe, w ater pipe, lightning rod or
telephone ground. Defective grounding could cause electric shock.
■
Do not damage the w ires.
Damaged ires could cause fire.
■
Be sure to shut off the main pow er w hen setting up the indoor P.C. board
or w iring.
Failure to do so could cause electric shock.
■
Use the specified ires to securely connect the indoor and outdoor units.
Attach the ires firmly to avoid applying stress to the terminal bloc .
Improper connection could cause fire.
■
Do not install the unit in a place here flammable gas may lea .
If gas leaks and accumulates around the unit, it could cause an explosion.
■
Do not use intermediate connection of the pow er cord or the extension
cord. Do not connect many devices to one AC outlet.
It could cause a fire or an electric shock.
■
Use the parts provided or specified parts for the installation or .
The use of defective parts could cause an injury or leakage of ater due to a
fire, an electric shock, the unit falling, etc.
■
W hen plugging the pow er supply plug into the outlet, mak e sure that there
is no dust, block age, or loose parts both in the outlet and on the plug.
Verify that the pow er supply plug is completely in the outlet.
If there is dust, blockage, or loose parts on the po er supply plug or the outlet,
it could cause electric shock or fire. If loose parts are found on the po er supply
plug, replace it.
■
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, w ater, etc. could collect in the unit and
could cause a fire or an electric shock.
■
W hen installing, relocating, or servicing the unit, mak e sure that no substance
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 ill cause mechanical failure, system malfunction,
or unit breakdo n. In the orst case, this could lead to a serious impediment
to securing product safety.
■
Do not discharge the refrigerant into the atmosphere. Check that the
refrigerant gas does not leak after installation has been completed. If
refrigerant leak s during installation, ventilate the room.
If refrigerant comes in contact ith a fire, harmful gas could be generated.
If refrigerant gas leaks indoors, and comes into contact ith the flame of a fan
heater, space heater, stove, etc., harmful gases ill be generated.
■
Use appropriate tools and piping materials for installation.
The pressure of R410A is 1.6 times higher than R22. Not using the appropri-
ate tools and materials, or improper installation could cause the pipes to burst
causing an injury.
■
W hen pumping dow n the refrigerant, stop the compressor before discon-
necting the refrigerant pipes.
I f the refrigerant pipes are disconnected w hile the compressor is running and
the stop valve is open, air could be dra n in and the pressure in the refrigera
-
tion cycle could become abnormally high, causing the pipes to burst.
■
W hen installing the unit, securely connect the refrigerant pipes before
starting the compressor.
I f the compressor is started before the refrigerant pipes are connected and the
stop valve is open, air could be dra n in and the pressure in the refrigeration
cycle could become abnormally high, causing the pipes to burst.
■
Fasten a flare nut ith a torque rench as specified in this manual.
If fastened too tight, a flare nut could break and cause refrigerant leakage.
■
Install the unit according to national w iring regulations.
■
Be sure to install a Ground Fault Interrupt (GFI) circuit break er.
Failure to install a Ground Fault Interrupt (GFI) circuit breaker may result in
electric shock or fire.
■
Perform the drainage/piping w ork securely according to the installation manual.
If there is defect in the drainage/piping ork, ater could drip from the unit,
and damage household items.
■
Do not touch the air inlet or the aluminum fins of the outdoor unit.
This could cause injury.
■
Do not install the outdoor unit w here small animals may live.
I f 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 w hen operated incorrectly.)
WARNING
(Could lead to death or serious injury, etc.)
1. BEFORE INSTALLATION
*7 I f pipe length exceeds 131.2 ft. (40 m), additional refrigerant (R410A) charge
is required. (No additional charge is required for pipe length less than 131.2 ft.
(40 m).)
Additional refrigerant (ft.) = A × (pipe length (ft.) - 131.2)
5
Additional refrigerant (m) = A × (pipe length (m) - 40)
*8 The piping specification table does not provide a minimum line set length.
Ho ever, indoor units ith connected piping length less than 10 ft. (3m) could
produce intermittent noise during normal system operation in very quiet envi
-
ronments. Please be aw are of this important information w hen installing and
locating the indoor unit w ithin the conditioned space.
Note:
When connecting the MFZ-KJ series indoor unit(s) to this outdoor unit, charge additional refrigerant according to the instructions in the table belo .
No. of MFZ-KJ indoor units
Pipe length ( L )
40 m or less
More than 40 m
1 unit
100 g additional (Total 2800 g)
100 g + {(L -40) m x 20 g/m)}
2 units
200 g additional (Total 2900 g)
200 g + {(L -40) m x 20 g/m)}
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