Mitsubishi Electric PEFY-WL06NMAU-A User manual

GBFE
INSTALLATION MANUAL
For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner unit.
MANUAL DE INSTALACIÓN
Para un uso seguro y correcto, lea detalladamente este manual de instalación antes de montar la unidad de aire acondicionado.
MANUEL D’INSTALLATION
Veuillez lire le manuel d’installation en entier avant d’installer ce climatiseur pour éviter tout accident et vous assurer d’une utilisation correcte.
Air-Conditioners
INDOOR UNIT
PEFY-WL06,08,12,15,18,24,27,30,36,48NMAU-A

2
1 1.4
[Fig. 1.4.1]
A
AAir vent valve

3
3 3.2
[Fig. 3.2.1]
Min. 300 [11-
13/16
]
Min.10 [7/16]
G
A
H
AC
B
D
[Fig. 3.2.2]
GH
I
F
700 [27-
9/16
]
450 [17 -
3/4
]
475 [18- 3/4 ]450
[17-
3/4 ]
Q
50−150
[2]−[5
-
15/16 ]450 [17-
3/4 ]
450 [17-
3/4
]
100−200
[3-
15/16 ]−[7- 7/8
]
Min.
300 [11-
13/16
]
P
E
A
D
[Fig. 3.2.3]
H
G
Min. 20 [13/16]
Min.10 [7/16]
B
C
A
B
J
[Fig. 3.2.4]
P
50 [2]
R
777 [30- 5/8 ]
450 [17-
3/4
]
475 [18- 3/4 ]
700 [27-
9/16
]50 [2]
Min. 300 [11-
13/16
]
E
A
I
J
F
G H
450
[17- 3/4 ]
100−200
[3-
15/16 ]−[7- 7/8
]
[Fig. 3.2.5]
777 [30- 5/8 ]
S
50 [2]
50 [2]
P
700 [27-
9/16
]
Min. 300 [11-
13/16
]
G H
K
F
A
I
AElectric box HIntake air
BCeiling IBottom of indoor unit
CCeiling beam JAccess door 3
DAccess door 2 (450 mm x 450 mm [17-3/4 in x 17-3/4 in]) KAccess door 4
EAccess door 1 (450 mm x 450 mm [17-3/4 in x 17-3/4 in])
FMaintenance access space
GSupply air
(Unit: mm [in])
Model P Q R S
PEFY-WL06,08,12NMAU-A 700
[27-9/16] 50–150 [2]–[5-15/16] 800 [31-1/2] 1300 [51-3/16]
PEFY-WL15NMAU-A 900
[35-7/16] 150–250 [5-15/16]–[9-7/8] 1000 [39-3/8] 1500 [59-1/16]
PEFY-WL18,24,27,30NMAU-A 1100
[43-5/16] 250–350 [9-7/8]–[13-13/16] 1200 [47-1/4] 1700 [66-15/16]
PEFY-WL36NMAU-A 1400
[55-1/8] 400–500 [15-3/4]–[19-11/16] 1500 [59-1/16] 2000 [78-3/4]
PEFY-WL48NMAU-A 1600
[63] 500–600 [19-11/16]–[23-5/8] 1700 [66-15/16] 2200 [86-5/8]
(Unit: mm [in])
(Viewed from the direction of the arrowA)
(Viewed from the direction of the arrow B)
(Viewed from the direction of the arrow B)

4
4 4.1
[Fig. 4.1.1]
YX
LW
A
Z
5 5.1
[Fig. 5.1.1]
B
A
[Fig. 5.1.2]
C
D
C
E
D
6 6.2
[Fig. 6.2.1]
41 [1-5/8]
67 [2-11/16]
60 [2-3/8]
239 [9-7/16]
357 [14-1/16]
30 [1-3/16]
217 [8-9/16]
171 [6-3/4]B
A
ACenter of gravity
AUnit body
BLifting machine C Nuts(eldsupply)
DWashers (square) (accessory)
E M10hangingbolt(eldsupply)
ADrain pipe (O.D. ø32 mm [1-1/4 in])
BDrain pipe (O.D. ø32 mm [1-1/4 in], spontaneous draining)
(Unit: mm [in])

5
6.3
[Fig. 6.3.1]
C
B
A
L
D
DD
E
K
M
B
HI
Max. 20 m [65 ft]
1.5-2 m [5-7 ft]
G
FFF
B
J
O
N
F
Max. 300 mm [11-13/16 in]
[Fig. 6.3.2]
B
CD DG
F
E
H
A
35
[1-13/32]
32
[1-1/4]25
[1]
6.4
[Fig. 6.4.1]
A
B
F
C
D
E
[Fig. 6.4.2]
○Correct piping
×Wrong piping
AInsulation (9 mm [3/8 in] or more)
BDownward slope (1/100 or more)
CSupport metal
KAir bleeder
LRaised
MOdor trap
Grouped piping
DO. D. ø32 mm [1-1/4 in] PVC TUBE
EMake it as large as possible. About 10 cm [3-15/16 in].
FIndoor unit
GMake the piping size large for grouped piping.
HDownward slope (1/100 or more)
IO. D. ø38 mm [1-1/2 in] PVC TUBE for grouped piping.
(9 mm [3/8 in] or more insulation)
JUp to 700 mm [27-9/16 in]
NDrain hose (accessory)
OHorizontal or slightly upgradient
A Indoor unit
B Tie band (accessory)
C Visible part
D Insertion margin
E Drain hose (accessory)
F Drainpipe(O.D.ø32mm[1-1/4in]PVCTUBE,eldsupply)
G Insulatingmaterial(eldsupply)
H Tie band (accessory)
(Unit: mm [in])
AInsert pump's end 2 to 4 cm
[13/16 to 1-5/8 in].
BRemove the water supply port.
CAbout 2500 cc
DWater
EFilling port
FScrew
SWE
<Indoor controller board>

6
7 7.2
[Fig. 7.2.1]
F
E
D
C
B
A
G
[Fig. 7.2.2]
A
CB
C
67 [2-11/16]
60 [2-3/8]
30 [1-3/16]
171 [6-3/4]
[Fig. 7.2.3]
DDDDD
F
D
AB
E
*1
CWater pipework is screw
connections
Note:
*1 Connection of multiple indoor units with one connection (or joint pipe)
• Total capacity of connectable indoor units: Less than 30
• Number of connectable indoor units: Maximum 3 Sets
• Selection of water piping
Select the size according to the total capacity of indoor units to be installed
downstream.
• Please group units that operate on 1 branch.
[Fig. 7.2.4]
C
B ED
E
A
ALocally procured insulating material for pipes
BBind here using band or tape.
CDo not leave any opening.
DLap margin: more than 40 mm
E Insulatingmaterial(eldsupply)
FUnit side insulating material
GDepending on the type of joint selected, a gap may be
left between the pipe cover on the unit side and the
joint.Ifthisisthecase,llthegapwithanotherpipe
cover (not supplied).
(Unit: mm [in])
AWater pipe: To HBC unit
BWater pipe: From HBC unit
CPipe-holding sheet metal
ATo outdoor unit
BEnd connection (brazing)
CHBC unit
DIndoor unit
E Twinningpipe(eldsupply)
FUp to three units for 1 branch hole; total capacity:
below 30 (but in same mode, cooling/heating)
AIndoor unit
BWater pipe: From HBC unit.
CWater pipe: To HBC unit
D Strainer(40meshormore)(eldsupply)
E Shuto󰀨valve(eldsupply)

7
8
[Fig. 8.0.1]
A
B
G
F
A
CE
D
A
BG
CE
A
F

D
[Fig. 8.0.2]
A
B
[Fig. 8.0.4]
C
D
[Fig. 8.0.3]
9 9.1 9.2
[Fig. 9.1.1]
A B
CCCC
D
C
~208, ~230
V
[Fig. 9.2.1]
TB5 TB15 TB5 TB15
SM1M2 SM1M2
TB3
M1M2 21 21
AA
B
CC
[Fig. 9.2.2]
ADuct
BAir inlet
CAccess door
DCanvas duct
ECeiling surface
FAir outlet
GLeave distance enough to
prevent short cycle
<A> In case of rear inlet
<B> In case of bottom inlet AFilter
BBottom plate
CNail for the bottom inlet
DNail for the rear inlet
AGround-fault interrupter
BLocal switch/Wiring breaker
CIndoor unit
DPull box
ATerminal block for indoor
transmission cable
BTerminal block for outdoor
transmission cable
CRemote controller
TB5 TB5
SM1M2 SM1M2
TB3
M1M2
AA
B
CC

8
9.2
[Fig. 9.2.3]
2
S
M2
M1
A
B
D
1
DC10 − 13
V
AB
12
L1 L2
C
[Fig. 9.2.4]
D
A
S
M2
M1
B
1
2
L1 L2
DC24−30 V
(A,B)
12 C
9.3
[Fig. 9.3.1] [Fig. 9.3.2]
C
D
E
[Fig. 9.3.3]
L
M
KJ
J
G
F
I
H
[Fig. 9.3.4]
N
PP
OO
N
L1 L2 M1 M2 S 1 2
[Fig. 9.3.5]
M2 SM1
A
B
C
E
D
9.5
[Fig. 9.5.1]
ANon-polarized
BTB15
CRemote Controller
DTB5
A
B
AScrew holding cover (1pc)
BCover
CTerminal box
DKnockout hole
ERemove
FUse PG bushing to keep the weight of the cable and external force from being
applied to the power supply terminal connector. Use a cable tie to secure the cable.
G Power source wiring K Side frame
H Use ordinary bushing L Knockout hole (for power source wiring)
I Transmission wiring M Washer (round) (accessory)
J Conduit
NTerminal block for power source
OTerminal block for indoor transmission
PTerminal block for remote controller
A Terminal block
B Round terminal
C Shield wire
D The earth wire from two cables is connected together to the S terminal. (Dead-end connection)
E Insulation tape (To keep the earth wire of the shielded cable from coming in contact with the transmission terminal)
SW21
SW11
SW12
SW14
<Indoor controller board>

9
Note: If you use other remote controllers, refer to either Installation Manual or Initial Setting Manual that comes with the controller to be used.
1. Safety precautions
1.1. Before installation and electric work
►Before installing the unit, make sure you read all the “Safety
precautions”.
►The “Safety precautions” provide very important points
regarding safety. Make sure you follow them.
Symbols used in the text
Warning:
Describes precautions that should be observed to prevent danger of injury or
death to the user.
Caution:
Describes precautions that should be observed to prevent damage to the unit.
Symbols used in the illustrations
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts. (This symbol is
displayed on the main unit label.) <Color: yellow>
: Beware of electric shock (This symbol is displayed on the main unit label.)
<Color: yellow>
Warning:
Carefully read the labels a󰀩xed to the main unit.
Warning:
• Ask the dealer or an authorized technician to install the air conditioner.
- Improper installation by the user may result in water leakage, electric shock, or
re.
• This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience
and knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their safety.
• Install the air unit at a place that can withstand its weight.
- Inadequate strength may cause the unit to fall down, resulting in injuries.
• Use the specied cables for wiring. Make the connections securely so that
the outside force of the cable is not applied to the terminals.
- Inadequateconnectionandfasteningmaygenerateheatandcauseare.
• Prepare for typhoons and other strong winds and earthquakes and install
the unit at the specied place.
- Improper installation may cause the unit to topple and result in injury.
• Always use an air cleaner, humidier, electric heater, and other accessories
specied by MITSUBISHI ELECTRIC CORPORATION.
- Ask an authorized technician to install the accessories. Improper installation by
theusermayresultinwaterleakage,electricshock,orre.
• Never repair the unit. If the air conditioner must be repaired, consult the
dealer.
- Iftheunitisrepairedimproperly,waterleakage,electricshock,orremay
result.
• If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualied persons in order to avoid a hazard.
• Do not touch the heat exchanger ns.
- Improper handling may result in injury.
• When handling this product, always wear protective equipment.
EG: Gloves, full arm protection namely boiler suit, and safety glasses.
- Improper handling may result in injury.
• Install the air conditioner according to this Installation Manual.
- Iftheunitisinstalledimproperly,waterleakage,electricshock,orremay
result.
• Have all electric work done by a licensed electrician according to “Electric
Facility Engineering Standard” and “Interior Wire Regulations” and the
instructions given in this manual and always use a special circuit.
- If the power source capacity is inadequate or electric work is performed
improperly,electricshockandremayresult.
• Keep the electric parts away from water (washing water etc.).
- Itmightresultinelectricshock,catchingreorsmoke.
• Securely install the outdoor unit terminal cover (panel).
- If the terminal cover (panel) is not installed properly, dust or water may enter the
outdoorunitandreorelectricshockmayresult.
• When moving and reinstalling the air conditioner, consult the dealer or an
authorized technician.
- Iftheairconditionerisinstalledimproperly,waterleakage,electricshock,orre
may result.
• Do not reconstruct or change the settings of the protection devices.
- If the pressure switch, thermal switch, or other protection device is shorted
andoperatedforcibly,orpartsotherthanthosespeciedbyMITSUBISHI
ELECTRICCORPORATIONareused,reorexplosionmayresult.
• To dispose of this product, consult your dealer.
• Do not use a leak detection additive.
• The installer and system specialist shall secure safety against leakage
according to local regulation or standards.
- The instructions in this manual may be applicable if local regulations are not
available.
• Pay a special attention to the place, such as a basement, etc. where
refrigeration gas can stay, since refrigeration is heavier than the air.
• Children should be supervised to ensure that they do not play with the
appliance.
• This appliance is intended to be used by expert or trained users in shops, in
light industry and on farms, or for commercial use by lay persons.
Contents
1. Safety precautions.................................................................................................9
1.1. Before installation and electric work..................................................... 9
1.2. Before getting installed....................................................................... 10
1.3. Before getting installed (moved) - electrical work .............................. 10
1.4. Before starting the test run................................................................. 10
2. Indoor unit accessories .......................................................................................10
3. Selecting an installation site................................................................................10
3.1. Install the indoor unit on a ceiling strong enough to sustain its
weight................................................................................................. 10
3.2. Securing installation and service space..............................................11
3.3. Connecting indoor units to outdoor units.............................................11
4. Fixing hanging bolts .............................................................................................11
4.1. Fixing hanging bolts............................................................................11
5. Installing the unit ..................................................................................................11
5.1. Hanging the unit body.........................................................................11
5.2. Conrmingtheunit’spositionandxinghangingbolts .......................11
6. Connecting drain pipes........................................................................................12
6.1. Drainpipespecications ....................................................................12
6.2. Drain pipe........................................................................................... 12
6.3. Drain piping work ............................................................................... 12
6.4. Conrmingdraindischarge ................................................................12
7. Connecting water pipe.........................................................................................13
7.1. Important notes on water pipework installation.................................. 13
7.2. Water pipe insulation.......................................................................... 13
7.3. Water treatment and quality control ................................................... 14
8. Duct work ............................................................................................................ 15
9. Electrical wiring ................................................................................................... 16
9.1. Power supply wiring...........................................................................16
9.2. Connecting remote controller, indoor and outdoor transmission
cables................................................................................................. 17
9.3. Connecting electrical connections...................................................... 18
9.4. ExternalI/Ospecications.................................................................. 18
9.5. Selecting the external static pressure................................................18
9.6. Setting addresses .............................................................................. 19
9.7. Sensing room temperature with the built-in sensor in a remote
controller ............................................................................................19
9.8. Changing the power voltage setting................................................... 19
9.9. Electrical characteristics..................................................................... 19

10
1.2. Before getting installed
Caution:
• Do not install the unit where combustible gas may leak.
- If the gas leaks and accumulates around the unit, an explosion may result.
• Do not use the air conditioner where food, pets, plants, precision
instruments, or artwork are kept.
- The quality of the food, etc. may deteriorate.
• Do not use the air conditioner in special environments.
- Oil,steam,sulfuricsmoke,etc.cansignicantlyreducetheperformanceofthe
air conditioner or damage its parts.
• When installing the unit in a hospital, communication station, or similar
place, provide su󰀩cient protection against noise.
- The inverter equipment, private power generator, high-frequency medical
equipment, or radio communication equipment may cause the air conditioner
to operate erroneously, or fail to operate. On the other hand, the air conditioner
maya󰀨ectsuchequipmentbycreatingnoisethatdisturbsmedicaltreatmentor
image broadcasting.
• Do not install the unit on a structure that may cause leakage.
- When the room humidity exceeds 80% or when the drain pipe is clogged,
condensation may drip from the indoor unit. Perform collective drainage work
together with the outdoor unit, as required.
• The indoor models should be installed the ceiling over than 2.5 m [9 ft]
from oor.
1.3. Before getting installed (moved) -
electrical work
Caution:
• Ground the unit.
- Do not connect the ground wire to gas or water pipes, lightning rods, or
telephone ground lines. Improper grounding may result in electric shock.
• Install the power cable so that tension is not applied to the cable.
- Tensionmaycausethecabletobreakandgenerateheatandcauseare.
• Install a leak circuit breaker, as required.
- If a leak circuit breaker is not installed, electric shock may result.
• Use power line cables of su󰀩cient current carrying capacity and rating.
- Cablesthataretoosmallmayleak,generateheat,andcauseare.
• Use only a circuit breaker and fuse of the specied capacity.
- A fuse or circuit breaker of a larger capacity or a steel or copper wire may result
inageneralunitfailureorre.
• Do not wash the air conditioner units.
- Washing them may cause an electric shock.
• Be careful that the installation base is not damaged by long use.
- If the damage is left uncorrected, the unit may fall and cause personal injury or
property damage.
• Install the drain piping according to this Installation Manual to ensure
proper drainage. Wrap thermal insulation around the pipes to prevent
condensation.
- Improper drain piping may cause water leakage and damage to furniture and
other possessions.
• Be very careful about product transportation.
- Only one person should not carry the product if it weighs more than 20 kg [45
LBS].
- Some products use PP bands for packaging. Do not use any PP bands for a
means of transportation. It is dangerous.
- Donottouchtheheatexchangerns.Doingsomaycutyourngers.
- Whentransportingtheoutdoorunit,suspenditatthespeciedpositionson
the unit base. Also support the outdoor unit at four points so that it cannot slip
sideways.
• Safely dispose of the packing materials.
- Packing materials, such as nails and other metal or wooden parts, may cause
stabs or other injuries.
- Tear apart and throw away plastic packaging bags so that children will not play
with them. If children play with a plastic bag which was not torn apart, they face
theriskofsu󰀨ocation.
1.4. Before starting the test run
Caution:
• 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.
• Do not touch the switches with wet ngers.
- Touchingaswitchwithwetngerscancauseelectricshock.
• Do not operate the air conditioner with the panels and guards removed.
- Rotating, hot, or high-voltage parts can cause injuries.
• Do not turn o󰀨 the power immediately after stopping operation.
- Alwayswaitatleastveminutesbeforeturningo󰀨thepower.Otherwise,water
leakage and trouble may occur.
• When water has been supplied to the water pipework, purge the system of
air. The details of air purging can be found separately in the water circuit
maintenance manual.
- Details are described in “Instructions for debris removal operation” under
Troubleshooting in the Service Handbook for the HBC.
- Refer to Fig. 1.4.1 for the position of the air vent valve on the indoor unit.
[Fig. 1.4.1] (P.2)
AAir vent valve
2. Indoor unit accessories
The unit is provided with the following accessories:
Part No. Accessories Qty.
1 Tie band 4
2 Drain hose 2
3 Washer (square) 8
Part No. Accessories Qty.
4 Installation manual 1
5 Operation manual 1
6 Washer (round) 2
3. Selecting an installation site
• Selectasitewithsturdyxedsurfacesu󰀩cientlydurableagainsttheweightof
unit.
• Before installing unit, the routing to carry in unit to the installation site should be
determined.
• Selectasitewheretheunitisnota󰀨ectedbyenteringair.
• Selectasitewheretheowofsupplyandreturnairisnotblocked.
• Select a site where refrigerant piping can easily be led to the outside.
• Select a site which allows the supply air to be distributed fully in room.
• Do not install unit at a site with oil splashing or steam in much quantity.
• Donotinstallunitatasitewherecombustiblegasmaygenerate,owin,
stagnate or leak.
• Do not install unit at a site where equipment generating high frequency waves (a
high frequency wave welder for example) is provided.
• Donotinstallunitatasitewhereredetectorislocatedatthesupplyairside.
(Fire detector may operate erroneously due to the heated air supplied during
heating operation.)
• When special chemical product may scatter around such as site chemical plants
and hospitals, full investigation is required before installing unit. (The plastic
components may be damaged depending on the chemical product applied.)
• If the unit is run for long hours when the air above the ceiling is at high
temperature/high humidity (dew point above 26°C [79°F]), dew condensation
may be produced in the indoor unit. When operating the units in this condition,
add insulation material (10-20 mm [13/32 to 13/16 in]) to the entire surface of the
indoor unit to avoid dew condensation.
3.1. Install the indoor unit on a ceiling strong
enough to sustain its weight
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 causing injuries.

11
3.2. Securing installation and service space
Secure enough access space to allow for the maintenance, inspection, and
replacement of the motor, fan, drain pump, heat exchanger, and electric box in one
of the following ways.
Select an installation site for the indoor unit so that its maintenance access space
will not be obstructed by beams or other objects.
(1) When a space of 300 mm [11-13/16 in] or more is available below the unit
between the unit and the ceiling (Fig. 3.2.1)
• Create access door 1 and 2 (450 x 450 mm [17-3/4 x 17-3/4 in] each) as shown
in Fig. 3.2.2. (Access door 2 is not required if enough space is available below
the unit for a maintenance worker to work in.)
(2) When a space of less than 300 mm [11-13/16 in] is available below the unit
between the unit and the ceiling (At least 20 mm [13/16 in] of space should be left
below the unit as shown in Fig. 3.2.3.)
• Create access door 1 diagonally below the electric box and access door 3
below the unit as shown in Fig. 3.2.4.
or
• Create access door 4 below the electric box and the unit as shown in Fig.
3.2.5.
[Fig. 3.2.1] (P.3)
[Fig. 3.2.2] (Viewed from the direction of the arrow A) (P.3)
[Fig. 3.2.3] (P.3)
[Fig. 3.2.4] (Viewed from the direction of the arrow B) (P.3)
[Fig. 3.2.5] (Viewed from the direction of the arrow B) (P.3)
AElectric box BCeiling
CCeiling beam
DAccess door 2 (450 mm x 450 mm [17-3/4 in x 17-3/4 in])
EAccess door 1 (450 mm x 450 mm [17-3/4 in x 17-3/4 in])
FMaintenance access space GSupply air
HIntake air IBottom of indoor unit
JAccess door 3 KAccess door 4
3.3. Connecting indoor units to outdoor units
For connecting indoor units to outdoor units, refer to the outdoor unit installation
manual.
4. Fixing hanging bolts
4.1. Fixing hanging bolts
[Fig. 4.1.1] (P.4)
ACenter of gravity
(Give site of suspension strong structure.)
Hanging structure
• Ceiling: The ceiling structure varies from building to one another. For detailed
information, consult your construction company.
• If necessary, reinforce the hanging bolts with anti-quake supporting members as
countermeasures against earthquakes.
*
UseM10forhangingboltsandanti-quakesupportingmembers(eldsupply).
Center of gravity and Product Weight
Model name W (mm [in]) L (mm [in]) X (mm [in]) Y (mm [in]) Z (mm [in]) Product Weight (kg [lb])
PEFY-WL06NMAU-A 643 [25-5/16] 754 [29-11/16] 330 [13] 300 [11-13/16] 130 [5-1/8] 21 [47]
PEFY-WL08NMAU-A 643 [25-5/16] 754 [29-11/16] 330 [13] 300 [11-13/16] 130 [5-1/8] 21 [47]
PEFY-WL12NMAU-A 643 [25-5/16] 754 [29-11/16] 330 [13] 300 [11-13/16] 130 [5-1/8] 21 [47]
PEFY-WL15NMAU-A 643 [25-5/16] 954 [37-9/16] 340 [13-3/8] 375 [14-3/4] 130 [5-1/8] 25 [55]
PEFY-WL18NMAU-A 643 [25-5/16] 1154 [45-7/16] 325 [12-13/16] 525 [20-11/16] 130 [5-1/8] 30 [67]
PEFY-WL24NMAU-A 643 [25-5/16] 1154 [45-7/16] 325 [12-13/16] 525 [20-11/16] 130 [5-1/8] 30 [67]
PEFY-WL27NMAU-A 643 [25-5/16] 1154 [45-7/16] 325 [12-13/16] 525 [20-11/16] 130 [5-1/8] 30 [67]
PEFY-WL30NMAU-A 643 [25-5/16] 1154 [45-7/16] 325 [12-13/16] 525 [20-11/16] 130 [5-1/8] 30 [67]
PEFY-WL36NMAU-A 643 [25-5/16] 1454 [57-1/4] 330 [13] 675 [26-9/16] 130 [5-1/8] 37 [82]
PEFY-WL48NMAU-A 643 [25-5/16] 1654 [65-1/8] 332 [13-1/16] 725 [28-9/16] 130 [5-1/8] 41 [91]
5. Installing the unit
5.1. Hanging the unit body
►Bring the indoor unit to an installation site as it is packed.
►To hang the indoor unit, use a lifting machine to lift and pass through the
hanging bolts.
[Fig. 5.1.1] (P.4)
AUnit body
BLifting machine
[Fig. 5.1.2] (P.4)
C Nuts(eldsupply)
DWashers (square) (accessory)
E M10hangingbolt(eldsupply)
5.2. Conrming the unit’s position and xing
hanging bolts
► Ensure that the hanging bolt nuts are tightened to x the hanging bolts.
►To ensure that drain is discharged, be sure to hang the unit at level using
a level.
Caution:
Install the unit in horizontal position. If the side with drain port is installed
higher, water leakage may be caused.

12
6. Connecting drain pipes
6.1. Drain pipe specications
Drain pipe O.D. ø32 mm [1-1/4 in]
6.2. Drain pipe
[Fig. 6.2.1] (P.4)
ADrain pipe (O.D. ø32 mm [1-1/4 in])
BDrain pipe (O.D. ø32 mm [1-1/4 in], spontaneous draining)
6.3. Drain piping work
• Ensure that the drain piping is downward (pitch of more than 1/100) to the
outdoor (discharge) side. Do not provide any trap or irregularity on the way.
• Ensure that any cross-wise drain piping is less than 20 m [65 ft] (excluding
thedi󰀨erenceofelevation).Ifthedrainpipingislong,providemetalbracesto
prevent it from waving. Never provide any air vent pipe. Otherwise drain may be
ejected.
• Use a hard vinyl chloride pipe O.D. ø32 mm [1-1/4 in] for drain piping.
• Ensure that collected pipes are 10 cm [3-15/16 in] lower than the unit body’s
drain port.
• Do not provide any odor trap at the drain discharge port.
• Put the end of the drain piping in a position where no odor is generated.
• Do not put the end of the drain piping in any drain where ionic gases are
generated.
[Fig. 6.3.1] (P.5)
○Correct piping
×Wrong piping
AInsulation (9 mm [3/8 in] or more)
BDownward slope (1/100 or more)
CSupport metal
KAir bleeder
LRaised
MOdor trap
Grouped piping
DO.D. ø32 mm [1-1/4 in] PVC TUBE
EMake it as large as possible. About 10 cm [3-15/16 in].
FIndoor unit
GMake the piping size large for grouped piping.
HDownward slope (1/100 or more)
IO. D. ø38 mm [1-1/2 in] PVC TUBE for grouped piping. (9 mm [3/8 in] or more
insulation)
JUp to 700 mm [27-9/16 in]
NDrain hose (accessory)
OHorizontal or slightly upgradient
1. Insert the drain hose (accessory) into the drain port (insertion margin: 32 mm
[1-1/4 in]).
(The drain hose must not be bent more than 45° to prevent the hose from
breaking or clogging.)
(Attachthehosewithglue,andxitwiththeband(accessory).)
2. Attachthedrainpipe(O.D.ø32mm[1-1/4in]PVCTUBEPV-25,eldsupply).
(Attachthepipewithglue,andxitwiththeband(accessory).)
3. Perform insulation work on the drain pipe (O.D. ø32 mm [1-1/4 in] PVC TUBE
PV-25) and on the socket (including elbow).
4. Check the drainage. (Refer to [Fig. 6.4.1])
5. Attachtheinsulatingmaterial,andxitwiththeband(accessory)toinsulatethe
drain port.
[Fig. 6.3.2] (P.5)
AIndoor unit
BTie band (accessory)
CVisible part
DInsertion margin
EDrain hose (accessory)
F Drainpipe(O.D.ø32mm[1-1/4in]PVCTUBE,eldsupply)
G Insulatingmaterial(eldsupply)
HTie band (accessory)
6.4. Conrming drain discharge
►Make sure that the drain-up mechanism operates normally for discharge
and that there is no water leakage from the connections.
• Besuretoconrmtheabovebeforeceilingworkisdoneinthecaseofanew
construction.
1. Remove the water supply port cover on the same side as the indoor unit piping.
2. Fillwaterintothefeedwaterpumpusingafeedwatertank.Inlling,besureto
put the end of the pump or tank in a drain pan. (If the insertion is incomplete,
watermayowoverthemachine.)
3. Perform the test run in cooling mode, or connect the connector to the ON side of
SWE on the Indoor controller board. (The drain pump and the fan are forced to
operate without any remote controller operation.) Make sure using a transparent
hose that drain is discharged.
SWE SWE
OFF ON OFF ON
< OFF > < ON >
4. Afterconrmation,cancelthetestrunmode,andturno󰀨themainpower.Ifthe
connector is connected to the ON side of SWE, disconnect it and connect it to
the OFF side, and attach the water supply port cover into its original position.
SWE SWE
OFF ON OFF ON
< ON > < OFF >
[Fig. 6.4.1] (P.5)
AInsert pump's end 2 to 4 cm [13/16 to 1-5/8 in].
BRemove the water supply port.
CAbout 2500 cc
DWater
EFilling port
FScrew
[Fig. 6.4.2] (P.5)
<Indoor controller board>

13
7. Connecting water pipe
Please observe the following precautions during installation.
7.1. Important notes on water pipework
installation
• The water pressure resistance of the water pipes in the heat source unit is 1.0
MPa [145 psi].
• Please connect the water pipework of each indoor unit to the correct port on the
HBC. Failure to do so will result in incorrect running.
• Please list the indoor units on the naming plate in the HBC unit with addresses
and end connection numbers.
• If the number of indoor units are less than the number of ports on the HBC, the
unused ports can be capped. Without a cap, water will leak.
• Use the reverse-return method to insure proper pipe resistance to each unit.
• Provide some joints and bulbs around inlet/outlet of each unit for easy
maintenance, checkup, and replacement.
• Installasuitableairventonthewaterpipe.Afterowingwaterthroughthepipe,
vent any excess air.
• Securethepipeswithmetaltting,positioningtheminlocationstoprotectpipes
against breakage and bending.
• Do not confuse the water intake and outlet piping. Error code 5102 will appear
on the remote controller if a test run is performed with the pipework installed
incorrectly (inlet connected to outlet and vice versa).
• This unit doesn’t include a heater to prevent freezing within tubes. If the water
owisstoppedonlowambient,drainthewaterout.
• The unused knockout holes should be closed and the refrigerant pipes, water
pipes,powersourceandtransmissionwiresaccessholesshouldbelledwith
putty.
• Installwaterpipesothatthewaterowratewillbemaintained.
• Wrap sealing tape as follows.
1 Wrap the joint with sealing tape following the direction of the threads
(clockwise), do not wrap the tape over the edge.
2 Overlap the sealing tape by two-thirds to three-fourths of its width on each
turn.Pressthetapewithyourngerssothatitistightagainsteachthread.
3 Do not wrap the 1.5th through 2nd farthest threads away from the pipe end.
• If there is a risk of freezing, carry out a procedure to prevent it.
• When connecting heat source unit water piping and on site water piping, apply
liquid sealing material for water piping over the sealing tape before connection.
• Do not use steel pipes as water pipes.
- Copper pipes are recommended.
• Install a strainer (40 mesh or more) on the pipe next to the valve to remove the
foreign matters.
• Be sure to provide anti-dew condensation treatment on the inlet and outlet of
the water pipes and on the valve. Provide an appropriate treatment on the end
surfaceofthedewproongmaterialtokeepcondensationout.
• When water has been supplied to the water pipework, purge the system of
air. The details of air purging can be found separately in the water circuit
maintenance manual.
• Leave the pipe-holding sheet metal as it is ([Fig. 7.2.2] Ⓒ). If the pipe is
connected without the sheet metal in place, undue force may be applied to the
pipe, and the pipe may become deformed.
• Be sure to braze the water pipes after covering a wet cloth to the insulation
pipes of the units in order to prevent them from burning and shrinking by
heat.
• Install the unit so that external force is not applied to the water pipes.
7.2. Water pipe insulation
1. Connect the water pipes of each indoor unit to the same (correct) end connection
numbers as indicated on the indoor unit connection section of each HBC unit. If
connected to wrong end connection numbers, there will be no normal operation.
2. List indoor unit model names in the name plate on the HBC unit control box (for
identicationpurposes),andHBCunitendconnectionnumbersandaddress
numbers in the name plate on the indoor unit side.
Seal unused end connections using cover caps (sold separately). Not replacing
on end cap will lead to water leakage.
3. Be sure to add insulation work to water piping by covering water pipework
separately with enough thickness heat-resistant polyethylene, so that no gap is
observed in the joint between indoor unit and insulating material, and insulating
materialsthemselves.Wheninsulationworkisinsu󰀩cient,thereisapossibilityof
condensation, etc. Pay special attention to insulation work in the ceiling plenum.
[Fig. 7.2.1] (P.6)
ALocally procured insulating material for pipes
BBind here usin g band or tape.
CDo not leave any opening.
DLap margin: more than 40 mm
E Insulatingmaterial(eldsupply)
FUnit side insulating material
GDepending on the type of joint selected, a gap may be left between the pipe cover on
theunitsideandthejoint.Ifthisisthecase,llthegapwithanotherpipecover(not
supplied).
[Fig. 7.2.2] (P.6)
AWater pipe: To HBC unit
BWater pipe: From HBC unit
CPipe-holding sheet metal
• Insulation materials for the pipes to be added on site must meet the following
specications:
HBC unit 20 mm [13/16 in] or more
-indoor unit
• Thisspecicationisbasedoncopperforwaterpiping.Whenusingplastic
pipework, choose a thickness based on the plastic pipe performance.
• Installation of pipes in a high-temperature high-humidity environment, such as
thetopoorofabuilding,mayrequiretheuseofinsulationmaterialsthickerthan
theonesspeciedinthechartabove.
• Whencertainspecicationspresentedbytheclientmustbemet,ensurethat
theyalsomeetthespecicationsonthechartabove.
4. Expansion vessel
Install an expansion vessel to accommodate expanded water. (circuit protection
valve set pressure: 600 kPa [87 psi])
Expansion vessel selection criteria:
• The water containment volume of the HBC.
• The maximum water temperature is 60°C [140°F].
• The minimum water temperature is 5°C [41°F].
• The circuit protection valve set pressure is 370-490 kPa [53-71 psi].
• The circulation pump head pressure is 0.24 MPa [35 psi].
5. Leakproof the water pipework, valves and drain pipework. Leakproof all the
way to, and include pipe ends so that condensation cannot enter the insulated
pipework.
6. Apply caulking around the ends of the insulation to prevent condensation getting
between the pipework and insulation.
7. Add a drain valve so that the unit and pipework can be drained.
8. Ensure there are no gaps in the pipework insulation. Insulate the pipework right
up to the unit.
9. Ensure that the gradient of the drain pan pipework is such that discharge can
only blow out.
10. HBC water pipe connection sizes
Model name Connection size Pipe size Water
volume(ℓ)
Water inlet Water
outlet Water out Water return
PEFY-WL06NMAU-A
O.D.
22 mm O.D. 22 mm
I.D.
≥20mm
[13/16 in]
I.D.
≥20mm
[13/16 in]
0.9
PEFY-WL08NMAU-A 0.9
PEFY-WL12NMAU-A 0.9
PEFY-WL15NMAU-A 1.2
PEFY-WL18NMAU-A 2.1
PEFY-WL24NMAU-A
I.D.
≥30mm
[1-3/16 in]
I.D.
≥30mm
[1-3/16 in]
2.1
PEFY-WL27NMAU-A 2.1
PEFY-WL30NMAU-A 2.1
PEFY-WL36NMAU-A 2.7
PEFY-WL48NMAU-A 3.7
[Fig. 7.2.3] (P.6)
ATo outdoor unit
BEnd connection (brazing)
CHBC unit
DIndoor unit
E Twinningpipe(eldsupply)
FUp to three units for 1 branch hole; total capacity: below 30 (but in same mode,
cooling/heating)
Note:
*1 Connection of multiple indoor units with one connection (or joint pipe)
• Total capacity of connectable indoor units: Less than 30
• Number of connectable indoor units: Maximum 3 Sets

14
• Selection of water piping
Select the size according to the total capacity of indoor units to be installed
downstream.
• Please group units that operate on 1 branch.
11. Please refer to the [Fig. 7.2.4] when connecting the water supply.
[Fig. 7.2.4] (P.6)
AIndoor unit
BWater pipe: From HBC unit
CWater pipe: To HBC unit
D Strainer(40meshormore)(eldsupply)
E Shuto󰀨valve(eldsupply)
12. Installashuto󰀨valveandstrainerinaplacethatiseasytooperateandmakes
maintenance work easy.
13. Applyinsulationtotheindoorunitpipework,strainer,shuto󰀨valve,andpressure
reducing valve.
14. Please do not use a corrosion inhibitor in the water system.
7.3. Water treatment and quality control
To preserve water quality, use the closed type of water circuit. When the circulating
water quality is poor, the water heat exchanger can develop scales, leading
to a reduction in heat-exchange power and possible corrosion. Pay careful attention
to water processing and water quality control when installing the water
circulation system.
• Removing of foreign objects or impurities within the pipes.
During installation, make sure that foreign objects, such as welding fragments,
sealant particles, or rust, do not enter the pipes.
• Water Quality Processing
1 Depending on the quality of the cold-temperature water used in the air
conditioner, the copper piping of the heat exchanger may corrode.
Regular water quality processing is recommended.
If a water supply tank is installed, keep air contact to a minimum, and keep
thelevelofdissolvedoxygeninthewaternohigherthan1mg/ℓ.
2 Water quality standard
Items
Low to mid-range tem-
perature water system Tendency
Recirculat-
ing water
[20<T<60°C]
[68<T<140°F]
Make-up
water Corro- sive
Scale-
form-
ing
Stand-
ard
items
pH (25°C) [77°F] 7.0–8.0 7.0–8.0 〇 〇
Electric
conductivity
(mS/m)
(25°C) [77°F] 30 or less
[300 or less] 30 or less
[300 or less]
〇 〇
(µ s/cm)
(25°C) [77°F]
Chloride
ion (mgCl-/ℓ) 50 or less 50 or less 〇
Sulfate ion (mg SO42-/ℓ) 50 or less 50 or less 〇
Acid consumption (pH4.8) 50 or less 50 or less 〇
(mg CaCO
3
/ℓ)
Total
hardness
(mg CaCO
3
/ℓ) 70 or less 70 or less 〇
Calcium
hardness
(mg CaCO
3
/ℓ) 50 or less 50 or less 〇
Ionic silica (mg SiO2/ℓ) 30 or less 30 or less 〇
Refer-
ence
items
Iron (mgFe/ℓ) 1.0 or less 0.3 or less 〇 〇
Copper (mgCu/ℓ) 1.0 or less 0.1 or less 〇
Suldeion (mg S2-/ℓ) not to be
detected not to be detected 〇
Ammonium
ion (mg NH4+/ℓ) 0.3 or less 0.1 or less 〇
Residual
chlorine (mgCl/ℓ) 0.25 or less 0.3 or less 〇
Free car-
bon dioxide (mg CO2/ℓ) 0.4 or less 4.0 or less 〇
Ryzner stability inde 6.0–7.0 – 〇 〇
Reference: Guideline of Water Quality for Refrigeration and Air Conditioning
Equipment. (JRA GL02E-1994)
3 Consult with a specialist about water quality control methods and calculations
before using anti-corrosive solutions.
4 When replacing a previously installed air conditioning device (even when only
theheatexchangerisbeingreplaced),rstconductawaterqualityanalysis
and check for possible corrosion.
Corrosion can occur in cold-water systems even if there has been no prior
signs of corrosion.
If the water quality level has dropped, adjust water quality before replacing
the unit.

15
8. Duct work
• In connecting duct, insert canvas duct between unit and duct.
• Use incombustible material for duct parts.
• Providefullinsulationtoinletductangeandoutletducttopreventcondensation.
• Besuretochangethepositionofairltertothepositionwhereitcanbeserviced.
[Fig. 8.0.1] (P.7)
<A>In case of rear inlet
<B>In case of bottom inlet
ADuct BAir inlet
CAccess door DCanvas duct
ECeiling surface FAir outlet
GLeave distance enough to prevent short cycle
• Procedure for changing the rear inlet to the bottom inlet.
Caution:
When the duct is connected to the inlet at the bottom of the unit, the sound
pressure level will be greater by approximately 10 dB than when the duct is
connected to the inlet at the back of the unit.
For this reason, it is recommended to connect the duct to the back inlet. When
using the inlet at the bottom of the unit, o󰀨set the position of the inlet on the
indoor unit relative to the inlet on the ceiling as shown in Figures <A> and <B>
to minimize noise.
[Fig. 8.0.2] (P.7)
AFilter BBottom plate
1. Removeairlter.(Firstremovelterlockscrew.)
2. Remove the bottom plate.
3. Fit the bottom plate to the rear of the body. [Fig. 8.0.3] (P.7)
(Positionoflug-holesontheplateisdi󰀨erentfromthoseforrearinlet.)
4. Fitltertotheundersideofthebody.
(Becarefulofwhichsideoftheltertot.)[Fig. 8.0.4] (P.7)
[Fig. 8.0.4] (P.7)
CNail for the bottom inlet DNail for the rear inlet
Caution:
• To reduce the risk of injury from metal sheet edges, wear protective gloves.
• Keep the distance between the inlet grille and the fan over 850 mm
[33-1/2 in].
If it is less than 850 mm [33-1/2 in], install a safety guard not to touch the
fan.
• Install su󰀩cient thermal insulation to prevent condensation forming on
outlet duct anges and outlet ducts.
• To avoid electrical noise interference, do not run transmission lines at the
bottom of the unit.
• The noise from the intake will increase dramatically if intake is tted
directly beneath the main body. Intake should therefore be installed as far
away from the main body as possible.
Particular care is required when using it with bottom inlet specications.
When the plate is attached on
the rear side, it exceeds the
height of the rear body panel.
Replicate the plate along the slit
when there is not enough room
above for the entire unit.
Screw holes are hidden under
the insulation. Screw through
the insulation to screw the plate
down.

16
9. Electrical wiring
Precautions on electrical wiring
Warning:
Electrical work should be done by qualied electrical engineers in accordance
with “Engineering Standards For Electrical Installation” and supplied
installation manuals. Special circuits should also be used. If the power circuit
lacks capacity or has an installation failure, it may cause a risk of electric
shock or re.
1. Be sure to install an earth leakage breaker to the power.
Use an earth leakage breaker with a sensitivity of less than 30 mA 0.1 s.
2. Install the unit to prevent that any of the control circuit cables (remote controller,
transmission cables) is brought in direct contact with the power cable outside the
unit.
3. Ensure that there is no slack on all wire connections.
4. Some cables (power, remote controller, transmission cables) above the ceiling
may be bitten by mice. Use as many metal pipes as possible to insert the cables
into them for protection.
5. Never connect the power cable to leads for the transmission cables. Otherwise
the cables would be broken.
6. Be sure to connect control cables to the indoor unit, remote controller, and the
outdoor unit.
7. Put the unit to the ground on the outdoor unit side.
8. Select control cables from the conditions given in page 16.
9. Perform wiring in compliance with the safety regulations detailed in UL1995.
Caution:
• Be sure to put the unit to the ground on the outdoor unit side. Do not
connect the earth cable to any gas pipe, water pipe, lightening rod, or
telephone earth cable. Incomplete grounding may cause a risk of electric
shock.
• If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualied persons in order to avoid a hazard.
Transmission cable specications Transmission cables ME Remote controller cables MA Remote controller cables
Type of
cable
Shielding wire (2-core)
CVVS, CPEVS or MVVS
Use UL wire rated 300 V.
Sheathed 2-core cable (CVV, shielded
CVVS, CPEVS or MVVS)
Use UL wire rated 300 V.
Sheathed 2-core cable
Use UL wire rated 300 V.
Cable
diameter More than 1.25 mm2 [AWG 16] 0.3 – 1.25 mm2[AWG 22 – 16]
(0.75 – 1.25 mm2[AWG 18 –16])*10.3 – 1.25 mm2[AWG 22 – 16] (0.75 – 1.25 mm2[AWG 18 –16])*1
Remarks
Max length: 200 m [656 ft]
Maximum length of transmission lines for centralized control and indoor/outdoor
transmission lines (Maximum length via indoor units): 500 m [1640 ft] MAX
The maximum length of the wiring between power supply unit for
transmission lines (on the transmission lines for centralized control) and each
outdoor unit and system controller is 200 m [656 ft].
When 10 m [32 ft] is exceeded, use
cableswiththesamespecicationas
transmission cables. Max length: 200 m [656 ft]
*1 Connected with simple remote controller. CVVS, MVVS: PVC insulated PVC jacketed shielded control cable
CPEVS: PE insulated PVC jacketed shielded communication cable
CVV: PVC insulated PVC sheathed control cable
9.1. Power supply wiring
• Use dedicated power supplies for the outdoor unit and indoor unit.
• Bear in mind ambient conditions (ambient temperature, direct sunlight, rain water, etc.) when proceeding with the wiring and connections.
• The wire size is the minimum value for metal conduit wiring. If the voltage drops, use a wire that is one rank thicker in diameter. Make sure the power-supply voltage does
not drop more than 10%.
• Specicwiringrequirementsshouldadheretothewiringregulationsoftheregion.
• Power supply cords of appliances shall not be lighter than design 245 IEC 57, 227 IEC 57, 245 IEC 53 or 227 IEC 53.
• A switch with at least 3 mm contact separation in each pole shall be provided by the Air conditioner installation.
• Wiring size must comply with the applicable local and national codes.
• Use copper supply wires.
Use UL wires rated 300 V or more for the power supply cords.
• Install a ground wire longer than other cables.
• Toensureall-pole-disconnectionfromthemainpowersupply,makesuretoprovideadisconnectionincorporatedinthexedwiringroutedtotheunitduringinstallation.
[Fig. 9.1.1] (P.7)
AGround-fault interrupter
BLocal switch/Wiring breaker
CIndoor unit
DPull box
Total operating current of the Indoor unit Minimum wire thickness (mm2/AWG) Breaker for wiring (NFB) Ground-fault interrupter *1
Main cable Branch Ground Capacity Fuse
F0 = 15 A or less *22.1/14 2.1/14 2.1/14 15 15 15 15 A current sensitivity *3
F0 = 20 A or less *23.3/12 3.3/12 3.3/12 20 20 20 20 A current sensitivity *3
F0 = 30 A or less *25.3/10 5.3/10 5.3/10 30 30 30 30 A current sensitivity *3
Apply to IEC61000-3-3 about Max. Permissive System Impedance.
*1 The Ground-fault interrupter should support Inverter circuit.
The Ground-fault interrupter should combine using of local switch or wiring breaker.
*2 Please take the larger of F1 or F2 as the value for F0.
F1 = Total operating maximum current of the indoor units × 1.2
F2 = {V1 × (Quantity of indoor unit 1)/C} + {V1 × (Quantity of indoor unit 2)/C} + {V1 × (Quantity of indoor unit 3)/C} +…
Indoor unit V1 V2
PEFY-WL·NMAU-A 18.6 3.0

17
• V1 and V2
V1andV2arebreakercoe󰀩cient.
V1:Breakercoe󰀩cientofratedcurrent
V2:Breakercoe󰀩cientofcurrentsensitivity
ThevaluesV1andV2di󰀨erfromdependingonthemodel.Therefore,pleaserefertoinstallationmanualofeachmodel.
• C: Multiple of tripping current at tripping time 0.01 s
Please pick up “C” from the tripping characteristic of the breaker.
<Example of “F2” calculation>
*Condition PEFY-WL·NMAU-A × 6, C = 8 (refer to right sample chart)
F2 = 18.6 × 6/8
= 13.95
➞15 A breaker (Tripping current = 8 × 15A at 0.01 s)
*3 Current sensitivity is calculated using the following formula.
G1 = V2 × (Quantity of indoor unit 1) + V2 × (Quantity of indoor unit 2) + V2 × (Quantity of indoor unit 3)
+ … + V3 × (Wire length [km])
<Example of “G1” calculation>
*Condition: PEFY-WL·NMAU-A × 5
V2 of PEFY-WL·NMAU-A = 3.0, Wire thickness and length: 1.5 mm2(AWG14) 0.2 km
G1 = 3.0 × 5 + 48 × 0.2
= 24.6
As a result, current sensitivity is 30 mA 0.1 sec or less.
G1 Current sensitivity Wire thickness V3
30 or less 30 mA 0.1 sec or less 1.5 mm248
100 or less 100 mA 0.1 sec or less 2.5 mm256
4.0 mm266
Warning:
• Be sure to use specied wires for connections and ensure no external force is imparted to terminal connections. If connections are not xed rmly, heating or
re may result.
• Be sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct current.
Caution:
• Some installation sites may require attachment of an earth leakage breaker for the inverter. If no earth leakage breaker is installed, there is a danger of electric
shock.
• Do not use anything other than the correct capacity breaker and fuse. Using fuse, wire or copper wire with too large capacity may cause a risk of malfunction
or re.
Notes:
• This device is intended for the connection to a power supply system with a maximum permissible system impedance (Refer to IEC61000-3-3.) at the interface
point (power service box) of the user’s supply.
• The user must ensure that this device is connected only to a power supply system which fulls the requirement above.
If necessary, the user can ask the public power supply company for the system impedance at the interface point.
• Backup operation
Even when the electrical work has not been completed, the fan and the drain pump can be operated by connecting the jumper (SWE) on the control board to the ON-side
and energizing the terminal block.
SWE SWE
OFF ON OFF ON
Reconnect the SWE on the control board to the OFF-side upon completion of all work.
9.2. Connecting remote controller, indoor
and outdoor transmission cables
• Connect indoor unit TB5 and outdoor unit TB3. (Non-polarized 2-wire)
The“S”onindoorunitTB5isashieldingwireconnection.Forspecications
about the connecting cables, refer to the outdoor unit installation manual.
• Install a remote controller following the manual supplied with the remote
controller.
• Connect the “1” and “2” on indoor unit TB15 to a MAremote controller.
(Non-polarized 2-wire)
• Connect the “M1” and “M2” on indoor unit TB5 to a M-NET remote controller.
(Non-polarized 2-wire)
• Connect the remote controller’s transmission cable within 10 m [32 ft] using a
0.75 mm2[AWG 18] core cable. If the distance is more than 10 m [32 ft], use a
1.25 mm2[AWG 16] junction cable.
[Fig. 9.2.1] (P.7) MA Remote controller
[Fig. 9.2.2] (P.7) M-NET Remote controller
ATerminal block for indoor transmission cable
BTerminal block for outdoor transmission cable
CRemote controller
• DC 10 to 13 V between 1 and 2 (MA remote controller)
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
[Fig. 9.2.3] (P.8) MA Remote controller
[Fig. 9.2.4] (P.8) M-NET Remote controller
ANon-polarized BTB15
CRemote Controller DTB5
• The MA remote controller and the M-NET remote controller cannot be used at the
same time or interchangeably.
~ 208/230 V
Indoor
unit 1 Indoor
unit 1 Indoor
unit 2 Indoor
unit 3 Indoor
unit 3
20
C
1086432
1
0.01
0.1
1
10
60
600
6000
SAMPLE
Tripping Time [s]
Rated Tripping current (x)
Sample chart

18
Note:
Ensure that the wiring is not pinched when tting the terminal box cover.
Pinching the wiring may cut it.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
• Fixpowersourcewiringtocontrolboxbyusingbu󰀨erbushingfortensileforce.
(PG connection or the like.) Connect transmission wiring to transmission terminal
block through the knockout hole of control box using ordinary bushing.
• After wiring is complete, make sure again that there is no slack on the
connections, and attach the cover onto the control box in the reverse order
removal.
9.3. Connecting electrical connections
Please identify the model name of the operation manual attached on the terminal
box cover with that shown on the rating name plate.
1. Remove the screw (1pc) holding the cover to dismount the cover.
[Fig. 9.3.1] (P.8)
AScrew holding cover (1pc) BCover
2. Open knockout holes
(Recommend to use a screwdriver or the like for this work.)
[Fig. 9.3.2] (P.8)
CTerminal box DKnockout hole
ERemove
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
3. Fixpowersourcewiringtoterminalboxbyusingbu󰀨erbushingfortensileforce.
(PG connection or the like.) Connect transmission wiring to transmission terminal
block through the knockout hole of terminal box using ordinary bushing.
[Fig. 9.3.3] (P.8)
FUse PG bushing to keep the weight of the cable and external force from being applied
to the power supply terminal connector. Use a cable tie to secure the cable.
GPower source wiring HUse ordinary bushing
ITransmission wiring JConduit
KSide frame LKnockout hole (for power source wiring)
MWasher (round) (accessory)
4. Connect the power source, Earth, transmission and remote controller wiring. The
dismounting of the terminal box is not needed.
[Fig. 9.3.4] (P.8)
NTerminal block for power source
OTerminal block for indoor transmission
PTerminal block for remote controller
[Shield wire connection]
[Fig. 9.3.5] (P.8)
ATerminal block BRound terminal
CShield wire
DThe earth wire from two cables is connected together to the S terminal. (Dead-end
connection)
EInsulation tape (To keep the earth wire of the shielded cable from coming in contact
with the transmission terminal)
5. After wiring is complete, make sure again that there is no slack on the
connections, and attach the cover onto the terminal box in the reverse order of
removal.
Caution:
Wire the power supply so that no tension is imparted. Otherwise
disconnection, heating or re result.
Notes:
• Do not pinch the cables or wires when attaching the terminal box cover.
Doing so may cause a risk of disconnection.
• When accommodating the terminal box, make sure that the connectors on
the box side are not removed. If removed, it cannot operate normally.
9.4. External I/O specications
Caution:
1. Wiring should be covered by insulation tube with supplementary insulation.
2. Use relays or switches with IEC or equivalent standard.
3. The electric strength between accessible parts and control circuit should
have 2750 V or more.
9.5. Selecting the external static pressure
Five levels of external static pressure are available for selection.
Set the setting either by using the switches on the control board (SW21-1, SW21-2, and SW21-5) or from the function selection screen on the remote controller.
[Fig. 9.5.1] (P.8)
<Indoor controller board>
Notes:
• When the static pressure setting was set from the remote controller, the actual setting and the switch setting on the control board may not match because the
latest setting from the remote controller overrides the previous setting. To check the latest static pressure setting, check it on the remote controller, not on the
switch.
• If the static pressure setting for the duct is lower than that for the unit, the fan of the unit may repeat start/stop, and the outdoor unit may remain in a stopped
state. Match the static pressure settings for the unit to that for the duct.
►To set the external static pressure with the switches on the control board
External static pressure SW21-1 SW21-2 SW21-5 Initial setting
0.14 in. WG
(35 Pa) OFF OFF OFF
0.20 in. WG
(50 Pa) ON OFF OFF ○
0.28 in. WG
(70 Pa) OFF ON ON
0.4 in. WG
(100 Pa) OFF OFF ON
0.60 in. WG
(150 Pa) ON OFF ON

19
►To set the external static pressure from the function selection screen on the remote controller
Follow the instructions below and the instructions detailed in the remote controller manual for how to set the switches.
1. Set the function setting No. 32 (Switch setting/Function selection) to “2”.
2. Set the function setting No. 8 and No. 10 to appropriate values, according to the external static pressure.
Selection Function setting No. Initial
setting Current setting
No. 32
Switch setting 1 ○
Function selection 2
External static
pressure
Function
setting No. Initial setting Current
setting
No. 8 No. 10
0.14 in. WG
(35 Pa) 2 1
0.20 in. WG
(50 Pa) 3 1 ○
0.28 in. WG
(70 Pa) 1 2
0.4 in. WG
(100 Pa) 2 2
0.60 in. WG
(150 Pa) 3 2
[Important]
Be sure to write down the settings
for all functions in the “Current
setting” row if any of the initial
settings has been changed.
9.6. Setting addresses
(Be sure to operate with the main power turned OFF.)
[Fig. 9.5.1] (P.8)
<Indoor controller board>
• There are two types of rotary switch setting available: setting addresses 1 to 9
and over 10, and setting branch numbers.
1 How to set addresses
Example: If Address is “3”, remain SW12 (for over 10) at “0”, and match
SW11(for 1 to 9) with “3”.
2 How to set branch numbers SW14 (Series R2 only)
The branch number assigned to each indoor unit is the port number of the
BC controller to which the indoor unit is connected.
Leave it to “0” on the non-R2 series of units.
• The rotary switches are all set to “0” when shipped from the factory. These
switches can be used to set unit addresses and branch numbers at will.
• The determination of indoor unit addresses varies with the system at site. Set
them referring to the Data Book.
9.7. Sensing room temperature with the built-
in sensor in a remote controller
If you want to sense room temperature with the built-in sensor in a remote controller,
set SW1-1 on the control board to “ON”. The setting of SW1-7 and SW1-8 as
necessaryalsomakesitpossibletoadjusttheairowatatimewhentheheating
thermometer is OFF.
9.8. Changing the power voltage setting
(Be sure to operate with the main power turned OFF.)
[Fig. 9.5.1] (P.8)
Please set the switch SW21 according to the power voltage.
• Set SW21-6 to OFF side when the power supply is 230 volts.
• When the power supply is 208 volts, set SW21-6 to ON side.
9.9. Electrical characteristics
Symbols : MCA : Max. Circuit Amps ( = 1.25 × FLA) FLA : Full LoadAmps
IFM : Indoor Fan Motor Output : Fan motor rated output
Model Indoor Unit IFM
Hz Volts Voltage range MCA (A) Output (kW) FLA (A)
PEFY-WL06NMAU-A
60 Hz 208–230 V 188 to 253 V
1.75 0.085 1.40
PEFY-WL08NMAU-A 1.75 0.085 1.40
PEFY-WL12NMAU-A 2.13 0.085 1.70
PEFY-WL15NMAU-A 2.88 0.121 2.30
PEFY-WL18NMAU-A 2.81 0.121 2.25
PEFY-WL24NMAU-A 2.88 0.121 2.30
PEFY-WL27NMAU-A 2.88 0.121 2.30
PEFY-WL30NMAU-A 2.88 0.121 2.30
PEFY-WL36NMAU-A 4.25 0.300 3.40
PEFY-WL48NMAU-A 4.38 0.300 3.50

20
Remarque : Si vous utilisez d’autres commandes à distance, reportez-vous au manuel d’installation ou au manuel de paramétrage initial fourni avec la commande à
distance à utiliser.
1. Précautions de sécurité
1.1. Avant l’installation et les travaux
électriques
► Avant d’installer l’unité, lisez attentivement toutes les
« Précautions de sécurité ».
►Les « Précautions de sécurité » fournissent des points très
importants concernant la sécurité. Veillez bien à les suivre.
Symboles utilisés dans le texte
Avertissement :
Décrit les précautions qui doivent être prises pour éviter les risques de blessure
ou de mort de l’utilisateur.
Attention :
Décrit les précautions qui doivent être prises pour éviter d’endommager l’unité.
Symboles utilisés dans les illustrations
: Indique une action qui doit être évitée.
: Indique des instructions importantes à suivre.
: Indique un élément à mettre à la terre.
: Indique des précautions à prendre lors du maniement de pièces tournantes. (Ce
symboleesta󰀩chésurl’étiquettedel’unitéprincipale.)<Couleur:jaune>
:Dangerd’électrocution(Cesymboleesta󰀩chésurl’étiquettedel’unité
principale.) <Couleur : jaune>
Avertissement :
Lisez attentivement les étiquettes apposées sur l’unité
principale.
Avertissement :
• Demandez à votre revendeur ou à un technicien agréé d’installer le
climatiseur.
- Une installation incorrecte par l’utilisateur peut entraîner une fuite d’eau, une
électrocution ou un incendie.
• Cet appareil n’a pas été conçu pour être utilisé par des personnes (y
compris des enfants) ayant des capacités physiques, sensorielles ou
mentales réduites, ou un manque d’expérience et de connaissances, à moins
qu’elles ne soient surveillées ou formées à son utilisation par une personne
responsable de leur sécurité.
• Installez l’unité de climatisation sur une structure capable de supporter son
poids.
- Autrement, l’unité risque de tomber et de blesser quelqu’un.
• Utilisez les câbles spéciés pour le câblage. Assurez-vous que les
branchements sont e󰀨ectués correctement de façon à ce que la force
externe du câble ne s’applique pas aux bornes.
- Unbranchementetunexationinadéquatspeuventgénérerdelachaleuret
provoquer un incendie.
• Prenez toutes les mesures nécessaires pour parer aux éventuels typhons
ou autres vents forts ainsi que les tremblements de terre, et installez l’unité
à l’endroit spécié.
- L’unité pourrait tomber et par conséquent blesser quelqu’un si l’installation n’est
pase󰀨ectuéecorrectement.
• Utilisez toujours les ltres à air, humidicateurs, chau󰀨ages électriques et
autres accessoires spéciés par MITSUBISHI ELECTRIC CORPORATION.
- Demandez à un technicien agréé d’installer les accessoires. Une installation
incorrecte par l’utilisateur peut entraîner une fuite d’eau, une électrocution ou
un incendie.
• Ne réparez jamais l’unité. Si le climatiseur doit être réparé, consultez le
revendeur.
- Une réparation incorrecte de l’unité peut entraîner une fuite d’eau, une
électrocution ou un incendie.
• Si le câble d’alimentation est endommagé, il doit être remplacé par
le fabricant, son agent de service après-vente ou une personne de
qualication similaire an d’éviter tout risque.
• Ne touchez pas les ailettes de l’échangeur de chaleur.
- Toute manipulation incorrecte pourrait provoquer des blessures.
• Lors de la manipulation de ce produit, veillez à toujours porter des
équipements de protection.
Par ex. : Gants, combinaison de travail et lunettes de sécurité.
- Toute manipulation incorrecte pourrait provoquer des blessures.
• Installez le climatiseur conformément à ce manuel d’installation.
- Une installation incorrecte de l’unité peut entraîner une fuite d’eau, une
électrocution ou un incendie.
• Demandez à un électricien qualié d’e󰀨ectuer l’installation électrique
conformément aux « Normes techniques des installations électriques » et
les « Réglementations sur le câblage intérieur » ainsi que les instructions
de ce manuel, et utilisez toujours un circuit spécial.
- Si la source d’énergie est inadéquate ou les travaux électriques sont exécutes
incorrectement, un risque d’électrocution et d’incendie peut en résulter.
• Maintenez les pièces électriques à l’écart de l’eau (eau de lavage, etc.).
- Celapourraitprovoqueruneélectrocution,uneinammationoudelafumée.
• Mettez fermement en place le couvercle des bornes de l’unité extérieure
(panneau).
- Si le couvercle des bornes (panneau) n’est pas mis en place correctement, de
la poussière ou de l’eau peut pénétrer dans l’unité extérieure et provoquer un
risque d’incendie ou d’électrocution.
• Veuillez consulter votre revendeur ou un technicien agréé lors du
déplacement et de l’installation du climatiseur dans un endroit di󰀨érent.
- Une installation incorrecte du climatiseur peut entraîner une fuite d’eau, une
électrocution ou un incendie.
• Ne reconstruisez pas ou ne changez pas les congurations des dispositifs
de protection.
- Si le pressostat, l’interrupteur thermique, ou autre dispositif de protection
estcourt-circuitéetforcé,ousidespiècesautresquecellesspéciéespar
MITSUBISHI ELECTRIC CORPORATION sont utilisées, un incendie ou une
explosion peut en résulter.
Table des matières
1. Précautions de sécurité.......................................................................................20
1.1. Avant l’installation et les travaux électriques...................................... 20
1.2. Avant de procéder à l’installation.......................................................21
1.3. Avant de procéder à l’installation (déplacement) - travaux
électriques.......................................................................................... 21
1.4. Avant de commencer l’essai..............................................................21
2. Accessoires de l’unité intérieure..........................................................................21
3. Sélection d’un lieu d’installation ..........................................................................22
3.1. Installationdel’unitéintérieuresurunplafondsu󰀩samment
résistant pour supporter son poids..................................................... 22
3.2. Espace requis pour l’installation et pour l’entretien............................ 22
3.3. Association des unités intérieures et des unités extérieures ............. 22
4. Fixation des boulons de suspension...................................................................22
4.1. Fixation des boulons de suspension..................................................22
5. Installation de l’unité............................................................................................23
5.1. Suspension de l’unité.........................................................................23
5.2. Véricationdelapositiondel’unitéetxationdesboulonsde
suspension.........................................................................................23
6. Raccordement des tuyaux d’écoulement............................................................23
6.1. Spécicationsdutuyaud’écoulement................................................ 23
6.2. Tuyau d’écoulement........................................................................... 23
6.3. Travaux de raccordement du tuyau d’écoulement............................. 23
6.4. Véricationdel’écoulement ...............................................................23
7. Raccordement de la canalisation d’eau ..............................................................24
7.1. Remarques importantes sur l’installation de la canalisation d’eau..... 24
7.2. Isolation de la canalisation d’eau.......................................................24
7.3. Traitement de l’eau et contrôle de la qualité de l’eau......................... 25
8. Raccords des conduits........................................................................................26
9. Câblage électrique .............................................................................................. 26
9.1. Câblage de l’alimentation électrique.................................................. 27
9.2. Raccordement des câbles de la commande à distance et des
câbles de transmission intérieurs et extérieurs.................................. 28
9.3. Raccordement des connexions électriques ....................................... 29
9.4. SpécicationsE/Sexternes ...............................................................29
9.5. Sélection de la pression statique extérieure ...................................... 29
9.6. Congurationdesadresses ...............................................................30
9.7. Détection de la température ambiante à l’aide du capteur intégré
de la commande à distance...............................................................30
9.8. Modicationduréglagedelatensiond’alimentation .........................30
9.9. Caractéristiques électriques..............................................................30