Mitsubishi Electric Mr. SLIM PUZ-A NHA3 Series User manual

bse
Mr.SLiM
Air-Conditioners
PUZ-A-NHA3, PUZ-A-NHA3-BS
PUY-A:-NHA3, PUY-A:NHA3-BS
INSTALLATION MANUAL SOR INST SELES
For safe and correct use, read this manual and the indoor unit installation manual thoroughly before installing
the air-conditioner unit.
MANUEL
D’INSTALLATION
Avant d’installer le climatiseur, lire attentivement ce manuel, ainsi que le manuel d’installation de l'appareil Frangais
intérieur pour une utilisation sire et correcte
MANUAL DE INSTALACION
Para un uso correcto y seguro, lea detalladamente este manual y el manual de instalacién de la unidad interior
antes de instalar la unidad de aire acondicionado.

Contents
1. Safety precautions 00.0.0. eee 2
2. Installation location 00... ee 3
3. Installing the outdoor unit... tee 4
4. Installing the refrigerant piping... 2.00.0... 0.0 cc ee 5
5. Drainage piping work .. 0.00. ee 7
1. Safety precautions
6. Electrical work 2.0.0. 7
7. TOStTUn octet eee 9
8. Special Functions 0.000.000. eee 10
9. System control (Fig. 9-1) 20... eee 1
> Before installing the unit, make sure you read all the “Safety precau-
tions”.
> Please report to or take consent by the supply authority before connec-
tion to the system.
AN Warning:
Describes precautions that must be observed to prevent danger of injury or
death to the user.
A\ Caution:
Describes precautions that must be observed to prevent damage to the unit.
After installation work has been completed, explain the “Safety Precautions,”
use,and maintenance of the unit to the customer according to the information in the
Operation Manual and perform the test run to ensure normal operation. Both the
Installation Manual and Operation Manual must be given to the user for keeping.
These manuals must be passed on to subsequent users.
© : Indicates a part which must be grounded.
A Warning:
Carefully read the labels affixed to the main unit.
AN Warning:
« The unit must not be installed by the user. Ask a dealer or an authorized
technician to instali the unit. If the unit is installed incorrectly, water
leakage,electric shock, or fire may result.
For installation work, follow the instructions in the Installation Manual and
use tools and pipe components specifically made for use with R410A re-
frigerant. The R410A refrigerant in the HFC system is pressurized 1.6 times
the pressure of usual refrigerants. If pipe components not designed for
R410A refrigerant are used and the unit is not installed correctly, the pipes
may burst and cause damage or injuries. In addition, water leakage, electric
shock, or fire may result.
The unit must be installed according to the instructions in order to mini-
mize the risk of damage from earthquakes, typhoons, or strong winds. An
incorrectly installed unit may fall down and cause damage or injuries.
The unit must be securely installed on a structure that can sustain its
weight. If the unit is mounted on an unstable structure, it may fall down and
cause damage or injuries.
If the air conditioner is installed in a small room, measures must be taken
to prevent the refrigerant concentration in the room from exceeding the
safety limit in the event of refrigerant leakage. Consult a dealer regarding
the appropriate measures to prevent the allowable concentration from be-
ing exceeded. Should the refrigerant leak and cause the concentration limit
to be exceeded, hazards due to lack of oxygen in the room may result.
Ventilate the room if refrigerant leaks during operation. If refrigerant comes
into contact with a flame, poisonous gases will be released.
All electric work must be performed by a qualified technician according to
local regulations and the instructions given in this manual. The units must
be powered by dedicated power lines and the correct voltage and circuit
breakers must be used. Power lines with insufficient capacity or incorrect
electrical work may result in electric shock or fire.
Use C1220 copper phosphorus, for copper and copper alloy seamless
pipes, to connect the refrigerant pipes. If the pipes are not connected cor-
rectly, the unit will not be properly grounded and electric shock may result.
Use only specified cables for wiring. The connections must be made se-
curely without tension on the terminals. If the cables are connected or in-
stalled incorrectly, overheating or fire may result.
The terminal block cover panel of the outdoor unit must be firmly attached.
If the cover panel is mounted incorrectly and dust and moisture enter the
unit, electric shock or fire may result.
When installing or moving the air conditioner, use only the specified refrig-
erant (R410A) to charge the refrigerant lines. Do not mix it with any other
refrigerant and do not allow air to remain in the lines. Air enclosed in the
lines can cause pressure peaks resulting in a rupture and other hazards.
Use only accessories authorized by Mitsubishi Electric and ask a dealer or
an authorized technician to install them. If accessories are incorrectly in-
stalled, water leakage, electric shock, or fire may result.
Do not alter the unit. Consult a dealer for repairs. If alterations or repairs are
not performed correctly, water leakage, electric shock, or fire may result.
The user should never attempt to repair the unit or transfer it to another
location. If the unit is installed incorrectly, water leakage, electric shock,
or fire may result. If the air conditioner must be repaired or moved, ask a
dealer or an authorized technician.
After installation has been completed, check for refrigerant leaks. If refrig-
erant leaks into the room and comes into contact with the flame of a heater
or portable cooking range, poisonous gases will be released.
1.1. Before installation
A\ Caution:
Do not use the unit in an unusual environment. If the air conditioner is
installed in areas exposed to steam, volatile oil (including machine oil), or
sulfuric gas, areas exposed to high salt content such as the seaside, or
areas where the unit will be covered by snow, the performance can be sig-
nificantly reduced and the internal parts can be damaged.
Do not install the unit where combustible gases may leak, be produced,
flow, or accumulate. If combustible gas accumulates around the unit, fire or
explosion may result.
The outdoor unit produces condensation during the heating operation.
Make sure to provide drainage around the outdoor unit if such condensa-
tion is likely to cause damage.
When installing the unit in a hospital or communications office, be prepared
for noise and electronic interference. Inverters, home appliances, high-
frequency medical equipment, and radio communications equipment can
cause the air conditioner to malfunction or breakdown. The air conditioner
may also affect medical equipment, disturbing medical care, and communi-
cations equipment, harming the screen display quality.
1.2. Before installation (relocation)
A\ Caution:
« Be extremely careful when transporting the units. 2 or more persons are
needed to handle the unit, as it weighs 20 kg, 44 Ibs or more. Do not grasp
the packaging bands. Wear protective gloves to remove the unit from the
packaging and to move it, as you can injure your hands on the fins or the
edge of other parts.
« Be sure to safely dispose of the packaging materials. Packaging materials,
such as nails and other metal or wooden parts may cause stabs or other
injuries.
The base and attachments of the outdoor unit must be periodically
checked for looseness, cracks or other damage. If such defects are left
uncorrected,the unit may fall down and cause damage or injuries.
Do not clean the air conditioner unit with water. Electric shock may result.
Tighten all flare nuts to specification using a torque wrench. If tightened too
much, the flare nut can break after an extended period and refrigerant can
leak out.

1. Safety precautions
1.3. Before electric work
A\ Caution:
¢ Be sure to install circuit breakers. If not installed, electric shock may result.
¢ For the power lines, use standard cables of sufficient capacity. Otherwise, a
short circuit, overheating, or fire may result.
« When installing the power lines, do not apply tension to the cabies. If the
connections are loosened, the cables can snap or break and overheating or
fire may result.
¢ Be sure to ground the unit. Do not connect the ground wire to gas or water
pipes, lighting rods, or telephone grounding lines. If the unit is not properly
grounded, electric shock may result.
¢ Use circuit breakers (ground fault interrupter, isolating switch (+B fuse),
and molded case circuit breaker) with the specified capacity. If the circuit
breaker capacity is larger than the specified capacity, breakdown or fire
may result.
1.4. Before starting the test run
ZX Caution:
« Turn on the main power switch more than 12 hours before starting opera-
tion. Starting operation just after turning on the power switch can severely
damage the internal parts. Keep the main power switch turned on during
the operation season.
¢ Before starting operation, check that all panels, guards and other protective
parts are correctly installed. Rotating, hot, or high voltage parts can cause
injuries.
« Do not touch any switch with wet hands. Electric shock may result.
Do not touch the refrigerant pipes with bare hands during operation. The
refrigerant pipes are hot or cold depending on the condition of the flowing
refrigerant. If you touch the pipes, burns or frostbite may result.
After stopping operation, be sure to wait at least five minutes before turn-
ing off the main power switch. Otherwise, water leakage or breakdown may
result.
1.5. Using R410A refrigerant air conditioners
AX Caution:
« Use C1220 copper phosphorus, for copper and copper alloy seamless
pipes, to connect the refrigerant pipes. Make sure the insides of the pipes
are clean and do not contain any harmful contaminants such as sulfuric
compounds, oxidants, debris, or dust. Use pipes with the specified thick-
hess. (Refer to page 5) Note the following if reusing existing pipes that car-
ried R22 refrigerant.
- Replace the existing flare nuts and flare the flared sections again.
- Do not use thin pipes. (Refer to page 5)
« Store the pipes to be used during installation indoors and keep both ends
of the pipes sealed until just before brazing. (Leave elbow joints, etc. in
their packaging.) If dust, debris, or moisture enters the refrigerant lines, oil
deterioration or compressor breakdown may result.
« Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration
oil applied to the flared sections. If mineral oil is mixed in the refrigeration
oil, oil deterioration may result.
2. Installation location
Do not use refrigerant other than R410A refrigerant. If another refrigerant is
used, the chlorine will cause the oil to deteriorate.
Use the following tools specifically designed for use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant. Contact your
nearest dealer for any questions.
Tools (for R410A
manifold Flare tool
hose Size
Vacuum
Electronic scale
Gas leak detector
T wrench
« Be sure to use the correct tools. If dust, debris, or moisture enters the re-
frigerant lines, refrigeration oil deterioration may result.
« Do not use a charging cylinder. If a charging cylinder is used, the composi-
tion of the refrigerant will change and the efficiency will be lowered.
©
Fig. 2-1
w A12, A18 (inchy ML A24, A30, A36, A42 (inch)
ah
x oh
aah
aN’
“Ys
oO
6
oo)
N
>
“
6. nD
2
<i,
gre
ab
Fig. 2-2
2.1. Refrigerant pipe (Fig. 2-1)
> Check that the difference between the heights of the indoor and outdoor
units, the length of refrigerant pipe, and the number of bends in the pipe
are within the limits shown below.
@Pipe length ®Height ©Number of
Models .
(one way) difference bends (one way)
A12, A18 Max. 30 m, 100 ft | Max. 30 m,100 ft Max. 15
A24,A30,A36,A42 | Max. 50m, 165 ft | Max. 30 m,100 ft Max. 15
* Height difference limitations are binding regardiess of which unit, indoor or out-
door, is positioned higher.
© Indoor unit
® Outdoor unit
2.2. Choosing the outdoor unit installation location
+ Avoid locations exposed to direct sunlight or other sources of heat.
Select a location from which noise emitted by the unit will not inconvenience
neighbors.
Select a location permitting easy wiring and pipe access to the power source and
indoor unit.
Avoid locations where combustible gases may leak, be produced, flow, or accu-
mulate.
Note that water may drain from the unit during operation.
Select a level location that can bear the weight and vibration of the unit.
Avoid locations where the unit can be covered by snow. In areas where heavy
snow fall is anticipated, special precautions such as raising the installation loca-
tion or installing a hood on the air intake must be taken to prevent the snow from
blocking the air intake or blowing directly against it. This can reduce the airflow
and a malfunction may result.
Avoid locations exposed to oil, steam, or sulfuric gas.
Use the transportation handles of the outdoor unit to transport the unit. If the unit
is carried from the bottom, hands or fingers may be pinched.
2.3. Outline dimensions (Outdoor unit) (Fig. 2-2)
The figure in parenthesis is for A42 model.

2. Installation location
Fig. 2-5
2.4. Ventilation and service space
2.4.1. Windy location installation
When installing the outdoor unit on a rooftop or other location unprotected from the
wind, situate the air outlet of the unit so that it is not directly exposed to strong winds.
Strong wind entering the air outlet may impede the normal airflow and a malfunction
may result.
The following shows three examples of precautions against strong winds.
@ Face the air outlet towards the nearest available wall about 50 cm, 19-11/16 inch
away from the wall. (Fig. 2-3)
® Install an optional air outlet guide and air guide if the unit is installed in a location
where strong winds from a typhoon, etc. may directly enter the air outlet. (Fig. 2-4)
@Air outlet guide
® Position the unit so that the air outlet blows perpendicularly to the seasonal wind
direction, if possible. (Fig. 2-5)
Wind direction
3. Installing the outdoor unit
2.4.2. When installing a single outdoor unit (Refer to the last page)
Minimum dimensions are as follows, except for Max., meaning Maximum dimen-
sions, indicated.
The figures in parentheses are for A42 models.
Refer to the figures for each case.
@® Obstacles at rear only (Fig. 2-6)
@® Obstacles at rear and above only (Fig. 2-7)
@® Obstacles at rear and sides only (Fig. 2-8)
+ 350mm, 13-25/32 inch for A12, A18
@® Obstacles at front only (Fig. 2-9)
+ When using an optional air outlet guide, the clearance for A42 models is 500 mm,
19-11/16 inch or more.
® Obstacles at front and rear only (Fig. 2-10)
+ When using an optional air outlet guide, the clearance for A42 models is 500 mm,
19-11/16 inch or more.
© Obstacles at rear, sides, and above only (Fig. 2-11)
* 350mm, 13-25/32 inch for A12, A18
» Do not install the optional air outlet guides for upward airflow.
2.4.3. When installing multiple outdoor units (Refer to the last page)
Leave 350 mm, 13-25/32 inch for A18 and 10 mm, 13/32 inch for A24-A42 space
or more between the units.
@® Obstacles at rear only (Fig. 2-12)
@® Obstacles at rear and above only (Fig. 2-13)
» No more than three units must be installed side by side. in addition, leave space as shown.
» Do not install the optional air outlet guides for upward airflow.
@® Obstacles at front only (Fig. 2-14)
+ When using an optional air outlet guide, the clearance for A42 models is 1000 mm,
39-3/8 inch or more.
@® Obstacles at front and rear only (Fig. 2-15)
+ When using an optional air outlet guide, the clearance for A42 models is 1000 mm,
39-3/8 inch or more.
® Single parallel unit arrangement (Fig. 2-16)
* When using an optional air outlet guide installed for upward airflow, the clearance is 500
(1000) mm, 19-11/16 (39-3/8) inch or more.
© Multiple parallel unit arrangement (Fig. 2-17)
+ When using an optional air outlet guide installed for upward airflow, the clearance is 1000
(1500) mm, 39-3/8 (59-1/16) inch or more.
@® Stacked unit arrangement (Fig. 2-18)
» The units can be stacked up to 2 units high.
+ No more than two stacked units must be installed side by side. in addition, leave space as
shown.
(inch)
Lo ©
| ©
m A12, A18 @ A24-A42
Max.
23/32
for
A12,
A18
Max,
1-3/16
for
A24-A42
® M10(3/8”)bolt
Base
© As long as possible.
© Vent
® Set deep in the ground.
@ A12, A18 M A24-A42 (inch)
19-1116 lin. 25-1932 49.44/46 / 23-5/8 Min. 14346 © 23-5/8
t
|
.
L
tt
{|
| I ye | les || ry I |ol§
| | | a | | | =
a ee a i si ow
se] oO
Min. 13-25/32 | | g Min. 13/32 | |_| al
6-29/32 §-29/32] 6-7/8 6-718]
3-4/2 37-13/32
Fig. 3-1
* Be sure fo install the unit in a sturdy, level surface to prevent rattling noises dur-
ing peration. (Fig. 3-1)
<Foundation specifications>
Foundation bolt
Thickness of concrete
Length of bolt
Weight-bearing capacity
M10 (3/8")
120 mm, 4-23/32 inch
70 mm, 2-3/4 inch
320 kg, 264 lbs
* Make sure that the length of the foundation bolt is within 30 mm, 1-3/16 inch of
the bottom surface of the base.
* Secure the base of the unit firmly with four-M10 foundation bolts in sturdy locations.
Installing the outdoor unit
* Do not block the vent. If the vent is blocked, operation will be hindered and break-
down may result.
* In addition to the unit base, use the installation holes on the back of the unit to at-
tach wires, etc., if necessary to install the unit. Use self-tapping screws (#5 = 15
mm, 13/16 * 19/32 inch or less) and install on site.
AN Warning:
« The unit must be securely installed on a structure that can sustain its
weight. If the unit is mounted on an unstable structure, it may fall down and
cause damage or injuries.
¢ The unit must be installed according to the instructions in order to minimize
the risk of damage from earthquakes, typhoons, or strong winds. An incor-
rectly installed unit may fall down and cause damage or injuries.

4. Installing the refrigerant piping
4.1. Precautions for devices that use R410A refrigerant
« Refer to page 3 for precautions not included below on using air condition-
Oo © ers with R410A refrigerant.
¢ Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration
oil applied to the flared sections.
« Use C1220 copper phosphorus, for copper and copper alloy seamless
® Liquid pipe pipes, to connect the refrigerant pipes. Use refrigerant pipes with the thick-
Gas pipe hesses specified in the table to the below. Make sure the insides of the
© Inslation pipes are clean and do not contain any harmful contaminants such as sul-
© Taping furic compounds, oxidants, debris, or dust.
AN Warning:
When installing or moving the air conditioner, use only the specified refriger-
Fig. 4-1 ant (R410A) to charge the refrigerant lines. Do not mix it with any other refrig-
Ig. 4- erant and do not allow air to remain in the lines. Air enciosed in the lines can
cause pressure peaks resulting in a rupture and other hazards.
A12, A18 A24-A42
96.35 mm, 1/4inch 99.52 mm, 3/8 inch
thickness 0.8 mm, 1/32 inch thickness 0.8 mm, 1/32 inch
Gas pipe 912.7 mm, 1/2 inch 915.88 mm, 5/8 inch
(inch) thickness 0.8 mm, 1/32 inch thickness 1.0 mm, 3/64 inch
Liquid pipe
« Do not use pipes thinner than those specified above.
4.2. Connecting pipes (Fig. 4-1) (Fig. 4-2)
When commercially available copper pipes are used, inslate both the liquid and
gas pipes separately with commercially available insulation materials (heat-resis-
tant to 100 °C, 212 °F or more, thickness of 12 mm, 1/2 inch or more). (Fig. 4-1)
* The indoor parts of the drain pipe should be wrapped with polyethylene foam insu-
lation materials (specific gravity of 0.03, thickness of 9 mm, 23/64 inch or more).
90°+
0.5°
[Fig. 4-2]
* Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening
flare nut. ©
® Flare cutting dimensions
Flare nut tightening torque + Use 2 wrenches to tighten piping connections. ®
+ Use leak detector or soapy water to check for gas leaks after connections are
completed.
+ Apply refrigerating machine oil over the entire flare seat surface. ©
+ Use the flare nuts for the following pipe size. ©
A12, A18 A24 - A42
Gas side Pipe size (mm, inch) | @12.7, 1/2” 215.88, 5/8”
Liquid side Pipe size (mm, inch) | 26.35, 1/4” 29.52, 3/8”
Fig. 4-2
*1: The flare nut is attached to its pipe.
*2: The flare nut is in the outdoor unit accessory.
® (Fig. 4-1) at :
- - Do not use the flare nut attached. If it is used, a gas leakage or even a pipe ex-
Copper pipe O.D. Flare dimensions traction may occur.
2A dimensions + When bending the pipes, be careful not to break them. Bend radii of 100 mm,
(mm) (inch) (mm) (inch) 3-15/16 inch to 150 mm, 5-27/32 inch are sufficient.
G6.35 1/4” 8.7-9.1 | 11/82 - 23/64 * Make sure the pipes do not contact the compressor. Abnormal noise or vibration
29.52 3/8” 12.8-13.2 | 1/2 - 33/64 may result.
212.7 1/2” 16.2-16.6 | 41/64 - 21/32 @ Pipes must be connected starting from the indoor unit.
215.88 5/8” 19.3-19.7 | 49/64 - 25/32 Flare nuts must be tightened with a torque wrench.
@ Flare the liquid pipes and gas pipes and apply a thin layer of refrigeration oil
(Applied on site).
(Fig. 4-1)
Copper pipe O.D. Flare nut O.D. Tightening torque 4.3. Refrigerant piping (Fig. 4-3)
(mm) (inch) (mm) (inch) (N-m) (ft-lbs)
26.35 1/4” 17 43/64 14-18 10-13 @ For A12, A18
29.52 3/8” 22 7/8 34-42 25 - 30 Remove the service panel © (1 screw).
212.7 1/2” 26 1 - 3/64 49 - 61 35 - 44 @ For A24-A42
215.88 5/8” 29 1 - 9/64 68 - 82 49-59 Remove the service panel © (3 screws) and the front piping cover ® (2 screws)
and rear piping cover © (2 screws).
mM A112, A18 M A24-A42 @® Perform refrigerant piping connections for the indoor/outdoor unit when the out-
door unit's stop valve is completely closed.
® Vacuum-purge air from the indoor unit and the connection piping.
@® After connecting the refrigerant pipes, check the connected pipes and the indoor
unit for gas leaks. (Refer to 4.4 Refrigerant pipe airtight testing method)
@® Vacuumize the refrigerant lines through the service port of the liquid stop valve
and then open the stop valves completely (for both the liquid and gas stop
valves). This will completely connect the refrigerant lines of the indoor and out-
door units.
+ If the stop valves are left closed and the unit is operated, the compressor and
control valves will be damaged.
+ Use a leak detector or soapy water to check for gas leaks at the pipe connec-
tion sections of the outdoor unit.
* Do not use the refrigerant from the unit to purge air from the refrigerant lines.
« After the valve work is completed, tighten the valve caps to the correct torque:
20 to 25 N-m, 14 to 18 ft-lbs (200 to 250 kgf-cm).
Failure to replace and tighten the caps may result in refrigerant leakage. In
addition, do not damage the insides of the valve caps as they act as a seal to
® Front piping cover
Piping cover
© Stop valve
© Service panei
® Bend radius : 100 mm, 3-15/16 inch-150 mm, 5-27/32 inch prevent refrigerant leakage.
. ® Use sealant to seal the ends of the thermal insulation around the pipe connec-
Fig. 4-3 tion sections to prevent water from entering the thermal insulation.
5

4. Installing the refrigerant piping
®
CO ®
\ } ©
<Q
©
© Local pipe
® Sealed, same way for gas side
@ Stop valve <Liquid side> © Pipe cover
® Stop valve <Gas side> @® Do not use a wrench here.
© Service port Refrigerant leakage may result.
© Open/Close section © Use 2 wrenches here.
(2)
* The figure to the left is an example only.
The stop valve shape, service port po-
sition, etc., may vary according to the
model.
* Turn section @ only.
(Do not further tighten sections ® and
together.)
© Charge hose
© Service port
Fig. 4-7
4.4. Refrigerant pipe airtight testing method
(1} Connect the testing tools.
* Make sure the stop valves @ © are closed and do not open them.
+ Add pressure to the refrigerant lines through the service port © of the liquid stop valve
©.
(2} Do not add pressure to the specified pressure all at once; add pressure little by little.
@® Pressurize to 0.5 MPa (5 kgf/cm2G), wait 5 minutes, and make sure the pressure does
not decrease.
@® Pressurize to 1.5 MPa (15 kgf/cm2G), wait 5 minutes, and make sure the pressure
does not decrease.
® Pressurize to 4.15 MPa (41.5 kgffem2G) and measure the surrounding temperature
and refrigerant pressure.
(3) If the specified pressure holds for about one day and does not decrease, the pipes have
passed the test and there are no leaks.
+ If the surrounding temperature changes by 1 °C, the pressure will change by about 0.03
MPa (0.3 kgf/cm2G). Make the necessary corrections.
(4) If the pressure decreases in steps (2) or (3), there is a gas leak. Look for the source of
the gas leak.
4.5. Stop valve opening method
(1) Gas side of A24-A42 (Fig. 4-5)
@® Remove the cap, pull the handle toward you and rotate 1/4 turn in a counter-
clockwise direction to open.
@® Make sure that the stop valve is open completely, push in the handle and rotate
the cap back to its original position.
(2) Liquid side of A24-A42 and Gas/Liquid side of A12, A18 (Fig. 4-6)
@ Remove the cap and turn the valve rod counterclockwise as far as it will go with
the use of a 4 mm hexagonal wrench. Stop turning when it hits the stopper.
(@6.35, 1/4 inch: Approximately 4.5 revolutions) (#9.52, 3/8 inch: Approximately
10 revolutions)
@® Make sure that the stop valve is open completely, push in the handle and rotate
he cap back to its original position.
® Valve @® Double spanner section
® Unit side (Do not apply a spanner other than to this sec-
© Operation section tion. Doing so would cause refrigerant leaks.)
© Cap @ Seal section
© Locai pipe side (Seal the end of the heat insulation material at
© Pipe cover the pipe connection section with whatever seal
© Service port material you have on hand so that water does
® Wrench hole not infiltrate the heat insulation material.)
®© Handle
Refrigerant pipes are protectively wrapped for A24-A42
* The pipes can be protectively wrapped up to a diameter of #90 mm, 3-35/64
inch before or after connecting the pipes. Cut out the knockout in the pipe cover
following the groove and wrap the pipes.
Pipe inlet gap for A24-A42
* Use putty or sealant to seal the pipe inlet around the pipes so that no gaps
remain.(If the gaps are not closed, noise may be emitted or water and dust will
enter the unit and breakdown may result.)
Precautions when using the charge valve (Fig.4-7)
Do not tighten the service port too much when installing it, otherwise, the valve
core could be deformed and become loose, causing a gas leak.
After positioning section ® in the desired direction, turn section @ only and tighten it.
Do not further tighten sections ® and © together after tightening section @.
4.6. Addition of refrigerant
« Additional charging is not necessary if the pipe length does not exceed 20 m, 70 ft
for A12-A36, 30 m 100 ft for A42.
* If the pipe length exceeds the specified length above, charge the unit with addi-
tional R410A refrigerant according to the permitted pipe lengths in the chart below.
* When the unit is stopped, charge the unit with the additional refrigerant through
the liquid stop vaive after the pipe extensions and indoor unit have been vacu-
umized.
When the unit is operating, add refrigerant to the gas check valve using a
safety charger. Do not add liquid refrigerant directly to the check valve.
* After charging the unit with refrigerant, note the added refrigerant amount on
the service label (attached to the unit).
Refer to the “1.5. Using R410A refrigerant air conditioners” for more information.
* Be careful when installing multiple units. Connecting to an incorrect indoor unit
can lead to abnormally high pressure and have a serious effect on operation per-
formance.
Max pipe Max height Additional refrigerant charging amount (kg/oz)
Model lonath tiifference 20m | 25m | 27m ] 30m | 335m | 366m] 40m | 43m | 455m | 488m] 50m
g 70 ft 80 ft 90 ft 100 ft 110 ft 120 ft 130 ft 140 ft 150 ft 160 ft 165 ft
A12, A18 30m, 100f | 30m, 100 ft o | ORG Ka) Ott ka) OT kg) _ - _ _ _ - -
0.17 kg | 0.34kg | 0.51 kg | 0.68kg | 0.85kg | 1.02kg | 1.19 kg | 1.36 kg | 1.53 kg | 1.70 kg
A24, A30, A36 50 m, 166 ft 30 m, 100 ft Q 6 oz 12 oz 18 oz 24 oz 30 oz 36 oz 42 oz 48 oz 54 oz 60 oz
0.17 kg | 0.34kg | 0.51 kg | 0.68kg | 0.85kg | 1.02 kg | 1.19 kg
Ade 50 m, 165 ft 30 m, 100 ft 0 0 0 0 6 oz 12 0z 18 oz 24 oz 30 oz 36 oz 42 oz

4. Installing the refrigerant piping
A24, A36 : A+B+C 350m, 165 ft
Fig. 4-8
5. Drainage piping work
| B-C |S 8m, 26 ft
4.7. For twin combination (For A24, A36 only)
Refrigerant piping limitation of length, height difference are shown in the figure. (Fig.
4-8)
® Indoor unit
Outdoor unit
© Multi distribution pipe (option)
® Height difference (Indoor unit-Outdoor unit) Max. 30 m, 100 ft
® Height difference (Indoor unit-Indoor unit) Max. 1m, 3 ft
Outdoor unit drainage pipe connection
When drain piping is necessary, use the drain socket or the drain pan (option).
A12, A18 | A24-A42
Drain socket PAC-SG61DS-E
Drain pan PAC-SG63DP-E | PAC-SG64DP-E
6. Electrical work
6.1. Outdoor unit (Fig. 6-1, Fig. 6-2) m A12, A18
@® Remove the service panel.
® Wire the cables referring to the Fig. 6-1 and the Fig. 6-2.
® indoor unit
Outdoor unit
© Remote controller
© Main switch (Breaker)
® Earth
® Earth terminal
Terminal block
© Clamp
© Service panel
® Wire the cables so that they do not
contact the center of the service
panel or the gas valve.
Fig. 6-2

@ A1i2, A18
TERMINAL BED aba ?
|
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CABLE STRAP
CORD COVER
CONDUIT COVER
ls
TTT
[ LT
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ee
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SERVICE PANEL
@ A24-A42
CONDUIT PLATE : accessory

6. Electrical work
6.2. Field electrical wiring
Outdoor unit model A12 Ai8 A24 A30 A36 A42
Outdoor unit power supply Single, 208/230 V, 60 Hz | Single, 208/230 V, 60 Hz | Single, 208/230 V, 60 Hz | Single, 208/230 V, 60 Hz | Single, 208/230 V, 60 Hz | Single, 208/230 V, 60 Hz
Breaker size *4 15A 415A 25A 30A 30A 30A
Minimum circuit ampacity 13A 138A 18A 25A 25A 26A
Maximum rating of overcurrent protective device 15A 20A 30A 40A 40A 40A
Outdoor unit power supply 2 « Min. AWG 14 2x Min. AWG 14 2x Min. AWG 12 2 «x Min. AWG 10 2x Min. AWG 10 2x Min. AWG 10
> ‘ Outdoor unit power supply earth 1 x Min. AWG 14 41 = Min. AWG 14 4 x= Min. AWG 12 1 x Min. AWG 10 4 x Min. AWG 10 4 = Min. AWG 10
5 < 8 indoor unit-Outdoor unit *{| 3x AWG 16 (polar) 3 x AWG 16 (polar) 3 x AWG 16 (polar) 3 x AWG 16 (polar) 3 x AWG 16 (polar) 3 x AWG 16 (polar)
= Indoor unit earth 4 1 x Min. AWG 16 41 x Min. AWG 16 4 x Min. AWG 16 1 x Min. AWG 16 41 x Min. AWG 16 4 x Min. AWG 16
Remote controfler-Indoor unit *2| 2 x AWG 22 (Non-polar) | 2 x AWG 22 (Non-polar) | 2 x AWG 22 (Non-polar) | 2 x AWG 22 (Non-polar) | 2 x AWG 22 (Non-polar) | 2 x AWG 22 (Non-polar)
Outdoor unit L1-L2 *3 AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V
3 2 Indoor unit-Outdoor unit S1-S2 *3 AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V
3 8 [Indoor unit-Outdoor unit S2-S3 *3 DC 24V DC 24V DC 24V DC 24V DC 24V DC 24V
Remote controller-Indoor unit *3 DC 12V DC 12V DC 12V DC 12V DC 12V DC 12V
*
= . Max. 45 m, 147 ft
if 2.5 mm? used, Max. 50 m, 164 ft
if 2.5 mm? used and S3 separated, Max. 80 m, 262ft
*2. The 10 m, 30 ft wire is attached in the remote controller accessory. Max 1500 ft
*3. The figures are NOT always against the ground. wo
$3 terminal has DC 24 V against $2 terminal. However between S3 and $1, these terminals are NOT electrically insulataed by the transformer or other device.
*4, Use earth leakage breaker (NV}
Notes: 1. Wiring size must comply with the applicable local and nationai code.
2. Use copper supply wires.
3. Use wires rated 600V or more for the power supply cables and the indoor/outdoor unit connecting cables.
4. Install an earth longer than other cables.
208/230V
Single phase
lsolator
3 poles isolator
$1 $1
A-Control $2
Outdoor Unit
$3
$2 A-Control
Indoor Unit
A
$3
AN Warning:
In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power
line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, $3 terminals when the power
is energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.
7. Test run
7.1. Before test run
» After completing installation and the wiring and piping of the indoor and
outdoor units, check for refrigerant leakage, looseness in the power supply
or control wiring, wrong polarity, and no disconnection of one phase in the
supply.
> Use a 500-volt megohmmeter to check that the resistance between the
power supply terminals and ground is at least 1.0MQ.
» Do not carry out this test on the control wiring (low voltage circuit) terminals.
Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0MQ.
Insulation resistance
After installation or after the power source to the unit has been cut for an extended
period, the insulation resistance will drop below 1 MQ due to refrigerant accumulat-
ing in the compressor. This is not a malfunction. Perform the following procedures.
1. Remove the wires from the compressor and measure the insulation resistance of
the compressor.
2. If the insulation resistance is below 1 MQ, the compressor is faulty or the resis-
tance dropped due the accumulation of refrigerant in the compressor.
3. After connecting the wires to the compressor, the compressor will start to warm
up after power is supplied. After supplying power for the times indicated below,
measure the insulation resistance again.
* The insulation resistance drops due to accumulation of refrigerant in the com-
pressor. The resistance will rise above 1 MQ after the compressor is warmed
up for two to three hours.
(The time necessary to warm up the compressor varies according to atmo-
spheric conditions and refrigerant accumulation.)
* To operate the compressor with refrigerant accumulated in the compressor, the
compressor must be warmed up at least 12 hours to prevent breakdown.
4. If the insulation resistance rises above 1 MQ, the compressor is not faulty.
4\Caution:
« The compressor will not operate unless the power supply phase connection
is correct.
«Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power switch can result
in severe damage to internal parts. Keep the power switch turned on during the
operational season.
> The followings must be checked as well.
* The outdoor unit is not faulty. LED1 and LED2 on the control board of the outdoor
unit flash when the outdoor unit is faulty.
* Both the gas and liquid stop valves are completely open.
* A protective sheet covers the surface of the DIP switch panel on the control board of
the outdoor unit. Remove the protective sheet to operate the DIP switches easily.
* Make sure that the all of the SW5 DIP switches for function changes on the con-
trol board of the outdoor unit are set to OFF. If all of the SW5 switches are not set
to OFF, record the settings and then set ail of the switches to OFF. Begin recov-
ering the refrigerant. After moving the unit fo a new location and completing the
test run, set the SW5 switches to the previously recorded settings.

7. Test run
7.2. Test run
7.2.1. Using SW4 in outdoor unit
1) PUH Type, PUZ Type
SWw4-1 ON . .
Sw42 OFF Cooling operation
SWw4-1 ON : .
Sw4.2 ON Heating operation
2) PUY Type
Swat ON Cooling operation
SW4-2 ON or OFF
* After performing the test run, set SW4-1 to OFF.
8. Special Functions
+ After power is supplied, a small clicking noise may be heard from the inside of
the outdoor unit. The electronic expansion valve is opening and closing. The unit
is not fauity.
* A few seconds after the compressor starts, a clanging noise may be heard from
the inside of the outdoor unit. The noise is coming from the check valve due to
the small difference in pressure in the pipes. The unit is not faulty.
The test run operation mode cannot be changed by DIP switch SW4-2 during
the test run. (To change the test run operation mode during the test run, stop
the test run by DIP switch SW4-1. After changing the test run operation mode,
resume the test run by switch SW4-1.)
7.2.2. Using remote controller
Refer to the indoor unit installation manual.
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CNDM
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© Outdoor unit control board
® Max. 10 m, 33 ft
® Circuit diagram example (low noise mode)
® On-site arrangement
© External input adapter (PAC-SC36NA)
8.1. Low noise mode (on-site modification) (Fig. 8-1)
By performing the following modification, operation noise of the outdoor unit can be
reduced by about 3-4 dB.
The low noise mode will be activated when a commercially available timer or the
contact input of an ON/OFF switch is added to the CNDM connector (option) on the
control board of the outdoor unit.
* The capacity may be insufficient according to the outdoor temperature and condi-
tions, etc.
@ Complete the circuit as shown when using the external input adapter (PAC-
SC36NA). (Option)
@® SW1 ON: Low noise mode
SW1 OFF: Normal operation
® © ©
procs cssaen \ pocscscsen \
: 3 a: : e Fig. 8-2
owe
Orange
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of
.
tena too CNDM
©
® Circuit diagram example (Demand function) © External input adapter (PAC-SC36NA)
® On-site arrangement ® Outdoor unit control board
® Max. 10 m, 33 ft
8.2. Demand function (on-site modification) (Fig. 8-2)
By performing the following modification, energy consumption can be reduced to 0
-100% of the normal consumption.
The demand function will be activated when a commercially available timer or the
contact input of an ON/OFF switch is added to the CNDM connector (option) on the
control board of the outdoor unit.
@ Complete the circuit as shown when using the external input adapter
(PAC-SC36NA). (Option)
@® By setting SW7-1 and SW7-2 on the control board of the outdoor unit, the ener-
gy consumption (compared to the normal consumption) can be limited as shown
below.
Sw7-1 SW7-2
OFF OFF
SW2 ON
ON OFF
OFF ON
8.3. Refrigerant collecting (pump down)
Perform the following procedures to collect the refrigerant when moving the indoor
unit or the outdoor unit.
@ Supply power (circuit breaker).
* When power is supplied, make sure that “CENTRALLY CONTROLLED?” is not
displayed on the remote controller. If “CENTRALLY CONTROLLED” is dis-
played, the refrigerant collecting (pump down) cannot be completed normally.
® After the gas stop valve is closed, set the SWP switch on the control board of the
outdoor unit to ON. The compressor (outdoor unit) and ventilators (indoor and
outdoor units) start operating and refrigerant collecting operation begins. LED1
and LED2 on the contro! board of the outdoor unit are lit.
* Only set the SWP switch (push-button type) to ON if the unit is stopped. How-
ever, even if the unit is stopped and the SWP switch is set to ON less than
three minutes after the compressor stops, the refrigerant collecting operation
cannot be performed. Wait until compressor has been stopped for three min-
utes and then set the SWP switch to ON again.
10
@® Because the unit automatically stops in about two to three minutes after the
refrigerant collecting operation (LED1 and LED2 are lit), be sure to quickly close
the gas stop valve. When LED1 and LED2 are lit and the outdoor unit is stopped,
open the liquid stop valve completely, and then repeat step 2 after three minutes
have passed.
* If the refrigerant collecting operation has been completed normally (LED1 and
LED2 are lit), the unit will remain stopped until the power supply is turned off.
@® Turn off the power supply (circuit breaker).