e n
1
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D o n o t i n s t a l l t h e u n i t b y y o u rs e l f ( u s e r) .
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.
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P e rfo rm t h e i n s t a l l a t i o n s e c u re l y re fe rri n g t o t h e i n s t a l l a t i o n m a n u a l .
Incomplete installation could cause fire or electric shock, injury due to the unit
falling, or leakage of ater.
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h e n i n s t a l l i n g t h e u n i t , u s e a p p ro p ri a t e p ro t e c t i v e e q u i p m e n t a n d t o o l s
fo r s a fe t y .
Failure to do so could cause injury.
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I n s t a l l t h e u n i t s e c u re l y i n a p l a c e w h i c h c a n b e a r t h e w e i g h t o f t h e u n i t .
If the installation location cannot bear the w eight of the unit, the unit could fall
causing injury.
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P e rfo rm e l e c t ri c a l w o rk a c c o rd i n g t o t h e i n s t a l l a t i o n m a n u a l a n d b e s u re t o
u s e a n e x c l u s i v e c i rc u i t . D o n o t c o n n e c t o t h e r e l e c t ri c a l a p p l i a n c e s t o t h e
c i rc u i t .
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.
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D o n o t d a m a g e t h e w i re s b y a p p l y i n g e x c e s s i v e p re s s u re w i t h p a rt s o r
s c re w s .
Damaged ires could cause fire.
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B e s u re t o c u t o ff t h e m a i n p o w e r i n c a s e o f s e t t i n g u p t h e i n d o o r P . C .
b o a rd o r w i ri n g w o rk s .
Failure to do so could cause electric shock.
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Use the specified ires to connect the indoor and outdoor units securely
and attach the ires firmly to the terminal bloc connecting sections so
t h e s t re s s o f t h e w i re s i s n o t a p p l i e d t o t h e s e c t i o n s .
Incomplete connecting and securing could cause fire.
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Do not install the unit in a place here inflammable gas may lea .
If gas leaks and accumulates in the area around the unit, it could cause an
explosion.
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D o n o t u s e i n t e rm e d i a t e c o n n e c t i o n o f t h e p o w e r c o rd o r t h e e x t e n s i o n
c o rd a n d d o n o t c o n n e c t m a n y d e v i c e s t o o n e A C o u t l e t .
It could cause a fire or an electric shock due to defective contact, defective
insulation, exceeding the permissible current, etc.
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Be sure to use the parts provided or specified parts for the installation
w o rk .
The use of defective parts could cause an injury or leakage of ater due to a
fire, an electric shock, the unit falling, etc.
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W h e n p l u g g i n g t h e p o w e r s u p p l y p l u g i n t o t h e o u t l e t , m a k e s u re t h a t t h e re i s
n o d u s t , c l o g g i n g , o r l o o s e p a rt s i n b o t h t h e o u t l e t a n d t h e p l u g . M a k e s u re
t h a t t h e p o w e r s u p p l y p l u g i s p u s h e d c o m p l e t e l y i n t o t h e o u t l e t .
If there is dust, clogging, or loose parts on the pow 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.
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A t t a c h t h e e l e c t ri c a l c o v e r t o t h e i n d o o r u n i t a n d t h e s e rv i c e p a n e l t o t h e
o u t d o o r u n i t s e c u re l y .
If the electrical cover of the indoor unit and/or the service panel of the outdoor
unit are not attached securely, it could result in a fire or an electric shock due
to dust, w ater, etc.
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h e n i n s t a l l i n g , re l o c a t i n g , o r s e rv i c i n g t h e u n i t , m a k e s u re t h a t n o s u b -
stance other than the specified refrigerant (R410A) enters the refrigerant
c i rc u i t .
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.
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D o n o t d i s c h a rg e t h e re fri g e ra n t i n t o t h e a t m o s p h e re . I f re fri g e ra n t l e a k s
d u ri n g i n s t a l l a t i o n , v e n t i l a t e t h e ro o m .
If refrigerant comes in contact ith a fire, harmful gas could be generated. Refriger
-
ant leakage may cause suffocation. Ventilate the room.
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C h e c k t h a t t h e re fri g e ra n t g a s d o e s n o t l e a k a ft e r i n s t a l l a t i o n h a s b e e n
c o m p l e t e d .
If refrigerant gas leaks indoors, and comes into contact ith the flame of a fan
heater, space heater, stove, etc., harmful substances ill be generated.
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U s e a p p ro p ri a t e t o o l s a n d p i p i n g m a t e ri a l s fo r i n s t a l l a t i o n .
The pressure of R410A is 1.6 times more than R22. Not using appropriate
tools or materials and incomplete installation could cause the pipes to burst
or injury.
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h e n p u m p i n g d o w n t h e re fri g e ra n t , s t o p t h e c o m p re s s o r b e fo re d i s c o n -
n e c t i n g t h e re fri g e ra n t p i p e s .
If 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 refrigeration cycle
could become abnormally high. This could cause the pipes to burst or injury.
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h e n i n s t a l l i n g t h e u n i t , s e c u re l y c o n n e c t t h e re fri g e ra n t p i p e s b e fo re
s t a rt i n g t h e c o m p re s s o r.
If the compressor is started before the refrigerant pipes are connected and
hen the stop valve is open, air could be dra n in and the pressure in the
refrigeration cycl e could become abnormally high. This could cause the pipes
to burst or injury.
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Fasten a flare nut ith a torque rench as specified in this manual.
If fastened too tight, a flare nut may break after a long period and cause
refrigerant leakage.
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T h e u n i t s h a l l b e i n s t a l l e d i n a c c o rd a n c e w i t h n a t i o n a l w i ri n g re g u l a t i o n s .
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G ro u n d t h e u n i t c o rre c t l y .
Do not connect the ground to a gas pipe, w ater pipe, lightning rod or telephone
ground. Defective grounding could cause electric shock.
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B e s u re t o i n s t a l l a G ro u n d F a u l t I n t e rru p t ( G F I ) c i rc u i t b re a k e r.
Failure to install a Ground Fault Interrupt (GFI) circuit breaker may result in
electric shock or fire.
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h e n o p e n i n g o r c l o s i n g t h e v a l v e b e l o w fre e zi n g t e m p e ra t u re s , re fri g -
e ra n t m a y s p u rt o u t fro m t h e g a p b e t w e e n t h e v a l v e s t e m a n d t h e v a l v e
b o d y , re s u l t i n g i n i n j u ri e s .
1-2. SPECIFICATIONS
1-1. THE FOLLO ING SHOULD AL A S BE OBSERVED FOR SAFET
• 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.
CAUTION
(Could lead to serious injury in particular environments hen operated incorrectly.)
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P e rfo rm t h e d ra i n a g e / p i p i n g w o rk s e c u re l y a c c o rd i n g t o t h e i n s t a l l a t i o n
m a n u a l .
If there is defect in the drainage/piping ork, ater could drop from the unit,
soaking and damaging household goods.
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Do not touch the air inlet or the aluminum fins of the outdoor unit.
This could cause injury.
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D o n o t i n s t a l l t h e o u t d o o r u n i t w h e re s m a l l a n i m a l s m a y l i v e .
If small animals enter and touch the electric parts inside the unit, it could
cause a malfunction, smoke emission, or fire. Also, advise user to keep the
area around the unit clean.
WARNING
(Could lead to death, serious injury, etc.)
Required Tools for Installation
Phillips scre driver
Level
Scale
Utility knife or scissors
Torque w rench
Wrench (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 UNIT INSTALLATION ............................................... 4
3. FLARING WOR AND PIPE CONNECTION
............................... 5
4. PURGING PROCEDURES, LEA TEST, AND TEST RUN
......... 6
5 . PUMPING DOWN ........................................................................ 7
Model
Pow er supply
Pipe length and height difference
*1, *2, *3, *4, *5, *6, *7, *8
Rated Voltage
Frequency
Max. pipe length per indoor
unit / for multi-system
Max. height difference
Max. no. of bends per in-
door unit / for multi system Refrigerant adjustment A *7
MXZ-3C24NA3
MXZ-3C30NA3
MXZ-4C36NA3
208 / 230 V
60 Hz
82 ft. (25 m) / 230 ft. (70 m)
49 ft. (15 m)
25 / 70
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.
*7 If pipe length exceeds 98 ft. (30 m), additional refrigerant (R410A) charge
is required. (No additional charge is required for pipe length less than 98 ft.
(30 m).)
Additional refrigerant (ft.) = A ×
(pipe length (ft.) – 98)
5
Additional refrigerant (m) = A × (pipe length (m) – 30)
*8 When connecting t o PAA-A18 units, be sure to provide the total piping length
of 33 ft (10 m) or more and change the gas pipe diameter to
ø
5/8 inch (15.88
mm).
1. BEFORE INSTALLATION
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