Aisin AWGP180E1NHS User manual

621471-43050
Always read before installation.
Applicable models
A word to the person in charge of installation
This GHP OUTDOOR UNIT INSTALLATION INSTRUCTIONS provides the installation procedures and precautions
for those with a basic knowledge of gas heat pumps. Improper installation will not guarantee the unit’s full performance
potential and could even cause injury or damage to the unit.
Accurately, read and fully understand the contents of this manual before beginning the installation of the GHP out-
door unit, and install the GHP properly according to the content of this manual. If indoor units, a remote controller
or other options, sold separately, are also to be installed, read and fully understand the contents of those unit’s
manuals as well.
Outdoor unit
Gas type
Natural gas
Combination Multi type 15 ton (180.000 Btu/h) AWGP180E1NHS
Important reminder
Be sure to check the model code of the GHP outdoor unit before installation. (The model code is
written on the plate at the bottom-right position in the rear of the GHP. )
This unit must be installed by specially trained personnel.
The installation must be accurately performed in accordance with the contents of this manual.
Perform test operation within 3 months since installation of the GHP on the base.
After installation, always use the “Installation Check List” to perform the final inspection.
GHP OUTDOOR UNIT INSTALLATION INSTRUCTIONS
Combination Multi Type
[Model 15 ton (180.000 Btu/h)]
Aisin Gas Heat Pump Air Conditioner

2
�Safety Precautions
In this manual, the precautions to prevent injuries and damages that can occur if this unit is improperly installed are
divided into and covered under the “ Warning” and “ Caution” graphics. In addition, “symbols” are used to
indicate proper instructions. Follow these instructions carefully.
What “ Warning” and “ Caution” mean
What “symbols” mean
Warning If the items with this symbol shown in this manual are not adhered to, serious injury or
death could occur.
Caution If the items with this symbol shown in this manual are not adhered to, injury or damage to
the unit could occur.
This indicates prohibited actions.
This indicates actions or requirements that must be completed.

3
TABLE OF CONTENTS
Main Unit and Piping
Electrical
Test OperationReference
Main Unit and Piping
1.
Before Installing...........................................4
1-1. Acceptable Installation location
....................... 4
1-2. Combinations and capacities of
the outdoor units and indoor units .................. 5
1-3. Parts provided ................................................ 6
1-4. Locally required parts..................................... 6
2.
Transporting Outdoor Unit ...........................7
2-1. Checking the transporting route .....................7
2-2. Methods for transporting the outdoor unit.......7
2-3. Dimensions related to transporting
the outdoor unit...............................................7
3.
Installation...................................................8
3-1. Selecting the location for installation ..............8
3-2.Space required for installation ......................10
3-3. Foundation and anchor bolt specifications ....11
4. Refrigerant Piping......................................13
4-1. Outline diagram of refrigerant piping ............ 13
4-2. Refrigerant piping installation specifications..... 14
4-3. Refrigerant piping - Selecting branch pipes
and permissible lengths................................ 18
4-4. Precautions during the installation
of refrigerant piping...................................... 26
4-5. Notes for branch piping................................ 30
4-6. Stop valve connections and
opening/closing............................................31
4-7. Refrigerant vapor leakage test and
vacuuming.................................................... 32
4-8. Charging the refrigerant ...............................34
4-9. Refrigerant piping insulation and
heat retention...............................................35
4-10.How to secure refrigerant piping .................. 35
5. Fuel Gas Piping Installation......................37
6. Drain Piping Installation ............................38
7. How to Extend Exhaust Pipe ....................41
Electrical
8.
Summary of Electric Wire Installation........43
8-1. Opening for power supply wires/
signal wires................................................... 43
8-2. Wiring example.............................................44
8-3. Changing the supplied power
voltage to 208VAC ...............................................44
9.
Electric Wire Specifications and
Precautions ..............................................45
9-1. Power supply wire ........................................ 45
9-2. Signal wire between indoor/outdoor units,
outdoor/outdoor units, and between
combined outdoor units ................................ 46
9-3. Remote control wire .....................................47
10.
Power Supply Wiring Procedure............... 48
10-1.Wiring instruction.......................................... 48
10-2.Wiring length................................................ 50
10-3.Branch wiring ............................................... 51
After Installation
11. Check after Installation .............................52
Test Operation
12. Various Function Settings..........................53
12-1. A ddress setting method of the indoor and
outdoor units.................................................53
12-2.EEP dip switch setting.................................. 53
12-3.Gas type setting........................................... 56
12-4.Cool/heat collective address setting.............57
12-5.Low-noise address setting ........................... 59
12-6.Field settings with the remote controller....... 61
12-7.List of setting contents and mode numbers.......62
13. Remote Control.........................................64
13-1.Remote control with 2 remote controllers..... 64
13-2.Group control .............................................. 64
14. Test Operation...........................................65
14-1.Before starting test operation....................... 65
14-2.Process of the outdoor unit when turning
ON the power............................................... 65
14-3.When installing additional indoor/outdoor
units or replacing the indoor/outdoor unit
PCBs ............................................................69
Reference
15. Installation Check List ...............................71
(Reference) Troubleshooting ............................72
1. Error code display........................................ 72
2. Cancelling the error codes ........................... 74

4
1. Before Installing
1-1. Acceptable installation location
�Altitude: under 2624’ 8” (800m) above sea level
�Wind velocity: under 98’ 5” ft/s (30m/s), and in a place where the airflow does not directly go into the air
intake on the right side of the machine
�Distance from ocean: 6561’ 8” (2000m) or more

Main Unit and Piping
Electrical
Test OperationReference
5
1. Before Installing
1-2. Combinations and capacities of the outdoor units and indoor units
[Combined installation]
[Stand-alone installation]
In a combination in which the total capacity of the connected indoor units exceeds the capacity of the outdoor
unit, the performance of each indoor unit will be lower than its rated capacity when all indoor units are operated
simultaneously. Always strive to keep the total capacity of the indoor units within the outdoor unit capacity.
Permissible piping length is restricted up to 328ft (actual length), and total piping length is restricted up to
1148 ft when the total capacity of the connected outdoor unit exceeds 130% of rated capacity.
Connectable indoor units are 7.000 Btu/h to 96.000 Btu/h.
Important reminder
Install the indoor units that correspond to indoor air conditioning load.
Otherwise, the units frequently repeat start and stop. That could result in breakdown of the units.
The number and total capacity of the connected indoor units must be within the range shown
below.
Connecting indoor units out of this range could result in breakdown.
Outdoor unit Number of connectable
indoor units
Total capacity of connectable
indoor units
15 ton + 15 ton Up to 63 190.000 to 611.000 (Btu/h)
56.0 to 179.2 (kW)
Outdoor unit Number of connectable
indoor units
Total capacity of connectable
indoor units
15 ton Up to 50 95.000 to 382.000 (Btu/h)
28.0 to 112.0 (kW)

6
1-3.Parts provided
The following parts are provided with this outdoor unit. Check the contents.
1-4. Locally required parts
The following items are required for installing this GHP.
Parts required
Name
This manual (INSTALLAT ION INSTRUCTIONS)
Shape
Quantity 1
Name
) (inch)enildiuqil(recudeR) (inch)enilropav(recudeR
Shape
Quantity
2 type, each 1piece
(Inner diameter: 1-1/4”/ Outer diameter: 1-1/8”)
(Inner diameter: 1-1/8”/ Outer diameter: 1-1/4”)
1 type, 1piece
(Inner diameter: 5/8”/ Outer diameter: 1/2”)
Location provided Inside of refrigerant compartment
NotesSelect the proper reducer according to the refrigerant pipe diameter.
noitacilppAtraP
(3/8”×4pcs)tinuroodtuognillatsniroFtlobrohcnA
(3/8”×4pcs)tinuroodtuognillatsniroFtun,rehsaW
Suspension bolt (M10), nutFor installing indoor units (4 pcs per indoor unit)
Copper pipe (C1220T) For refrigerant piping (Refer to “4-3. Refrigerant piping - Selecting branch piping
and permissible lengths” on page 18)
Hard plastic (PVC: polyvinyl chloride)
pipe (VP) For outdoor unit drain (VP20, VP30, VP50)
(3/4 14 NPT)gnipipsagleufroF)PGS(epipleetS
Reinforced gas hoseFor fuel gas piping
Gas ValveFor fuel gas piping
Insulating material For refrigerant and drain pipe insulation
Power supply wire For electric power supply for indoor and outdoor units
(Refer to “9-1. Power supply wire” on page 45)
Signal wire between indoor and out-
door units
For communication between indoor and outdoor units
(Refer to “9-2. Signal wire between indoor-outdoor units, outdoor-outdoor units, and
between combined outdoor units” on page 46)
Remote control wire For connecting indoor unit and remote controller
(Refer to “9-3. Remote control wire” on page 47)
tinuroodtuoehtgnidnuorgroFeriwdnuorG
)A014R(gnigrahclanoitiddaroFtnaregirfeR
)01LN(seralfehtotgniylpparoFliotnaregirfeR
sepiphcnarbredaehroFepippmirC
Reducer (for combined installation) Get appropriate reducers locally.
INSTALLATION
INSTRUCTIONS

Main Unit and Piping
Electrical
Test OperationReference
7
2. Transporting Outdoor Unit
2. Transporting Outdoor Unit
2-1. Check the transporting route
�Make sure that the route to the installation site and any openings are large enough for the outdoor unit to be
transported through.
�Make sure that the route to the installation site has the strength to withstand the weight of the outdoor unit.
2-2. Methods for transporting the outdoor unit
�Use nylon slings rigged in the manner shown in the illustration below.
Protect the outdoor unit wherever necessary to prevent damage or deformity.
Take care so that the refrigerant piping or exhaust water drain hoses are not pinched.
�If a forklift is used for transport, spread the fork as wide as possible so that they fit in the opening at the bottom
of the unit (as shown in the illustration below). Insert the forks completely, taking care not to damage the unit
with the forks.
�Do not tilt the unit 30° or more. (Never tip the unit on its side)
2-3. Dimensions related to transporting the outdoor unit
(when the wooden blocks under the legs of the outdoor unit are removed)
WeighttinuroodtuO
66(W)×39-5/8(D)×85-7/8(H) (inch)
1676(W)×1006(D)×2180(H) (mm)
1675 lbs
(760 kg)
15 ton
Protect with
blanket or other
such material
Hook
Exhaust drain hose
3’ 4” (1m)
or more
space
Use 2 nylon slings
Caution
Prevent the unit from
deformation by the
nylon slings.
Fork
snoisnemidtropsnarT

8
3. Installation
3-1.Selecting the location for installation
*If there is no choice of installation location other than where the exhaust gas could flow into the room or could
cause harm to the surroundings, extend the exhaust pipe. refer to “7. How to extend exhaust pipe” on page 41
for details.
Warning
�Never install the outdoor unit at an indoor location.
�Never install the outdoor unit at a location where the exhaust gas could flow into the
room.
If the outdoor unit is installed near the intake/exhaust port to the room, window or ventilation
port, the exhaust gas could flow into the room and cause gas poisoning or an accident due to
lack of oxygen.
�Never install the outdoor unit in an area where flammable gas can be produced, flow
into, accumulate or leak, or where volatile flammable materials can be treated.
Installation at such locations could result in a fire or an explosion.
�Always install the outdoor unit at an outdoor area open to the atmosphere.
If the exhaust gas accumulates, it could cause gas poisoning or an accident due to lack of
oxygen.
Install the outdoor unit where adequate ventilation is provided.
�Make sure that the area where the outdoor unit is going to be installed is strong
enough to withstand the unit’s mass.
If the location is not strong enough, the outdoor unit could fall over and cause injury or accident.
�Always discharge the exhaust gas to the atmosphere at a location where the gas will
not cause adverse affects on the surrounding area.
If the exhaust gas is exhausted into the catch basin or ditch, it could be drawn into the room
and cause gas poisoning or accident due to lack of oxygen.
Caution
�Never install the outdoor unit at a location where its exhaust gas or air from its blower
fan will come in contact with plants or animals.
The exhaust gas or discharged air could cause harm to these plants or animals.
�When the outdoor unit is installed on the roof or at a high location, install a permanent
ladder or railings along the path to the unit, and install a fence or railings around the
unit for the worker.
If these devices are not installed, the worker could fall.

Main Unit and Piping
Electrical
Test OperationReference
9
3. Installation
Important reminder
�Always install the outdoor unit at a location where its operating noise and vibration will not cause
problems for those below or surrounding the unit. (This is especially important when installing in res-
idential areas.)
�Install the outdoor unit where the discharged air from the fan does not blow on nearby homes.
�Install the outdoor unit at a level location where rainwater does not penetrate and water does not
accumulate.
�Install the outdoor unit at a location where it will not be exposed to strong winds.
�The noise from the outdoor unit may cause an adverse effect on other electrical equipment. Always
install the unit at a location distant enough from the electrical equipments such as televisions, radios,
computers, telephones and their antennas, electrical wires, and signal wires.
�Install the outdoor unit at a location where heat from other equipment does not cause an adverse
effect on the unit.
�If the outdoor unit is installed in a heavy snowfall area, install the unit where accumulated snow
does not fall on the unit, and install the optional snow hood as well. Also make sure that the foun-
dation for the unit is high enough so as not to be affected by accumulated snow.
�Allocate the route for loading/unloading the equipment, materials and parts for maintenance at the
installation site (minimum route width: 47-1/4” (1200mm), maximum mass of equipment, materials
and parts: 551 Ibs (250 kg) ).
�Do not install the outdoor unit at a location where fallen leaves accumulate.

10
3-2.Space required for installation
1) Provide sufficient distance from flammable materials
2) Installation space
Provide ample space for inspection and maintenance taking the refrigerant and fuel gas piping into account.
Warning
�Install the outdoor unit in the proper distance from flammable items as required by the rel-
evant local and national regulations, and technical standards.
If the distance does not meet the requirements, it could result in a fire.
Caution
� The following drawings show the minimum installation space for providing room for intake air
and inspection and maintenance operations.
Insufficient space could result in injury to the maintenance personnel or damage to the equip-
ment.
weivpoTweivtnorF
Important reminder
�When 4 or more of outdoor units are installed in the same location, nearby walls or other objects
could obstruct air flow and cause short circuit.
To prevent a decline in performance and trouble due to
short circuit of airflow, larger installation space is necessary. Contact an authorized dealer for details.
6’ 7” (2m) or more
2-1/4’ (700 mm)
or more
Either A or B must be
4 in (100 mm) or more.
The other side must be
1-1/4’ (350 mm) or more.
4 in (100 mm)
or more
4 in
(100 mm)
or more 4 in (100 mm)
or more
4 in (100 mm)
or more
4 in (100 mm)
or more
1-3/4’ (500 mm)
or more
Provide space of
6’ 7” (2m) or more above
the unit.
2-1/4’ (700 mm) or more*1
1-1/4’ (350 mm)
or more
1-3/4’ (500 mm) or more
This space must be 4’ (1200 mm) or more when the
snow hood is mounted.
*1
When 5 or more units are installed in a row,
provide a service space for every 4 units.
*2

Main Unit and Piping
Electrical
Test OperationReference
11
3. Installation
3-3. Foundation and anchor bolt specifications
1) Foundation shape
The foundation must have sufficient strength in accordance with the drawings below. In order to protect the out-
door unit from rain, dust or damage, the height of the foundation must be 8 inch (200) from the ground.
The foundation must have grooves around itself that directs drain water to the drainage port.
The foundation must support the mass of the outdoor unit evenly and must be flat and smooth so that water will
not accumulate on the upper surface.
Never use a foundation that consists of more than one piece of block. Such a foundation will not provide neces-
sary strength.
Condensation water may drip from the bottom of the outdoor unit. Install a drain pan if the condensation water
could cause problems.
Warning
 The foundation must provide a firm and level surface for installing the outdoor unit so that the
outdoor unit does not tip over in the event of strong winds (gust, etc.) or earthquakes.
If the foundation strength is insufficient, the outdoor unit could tip over and cause fuel gas
leakage or injury.
Installation location/
Designed earthquake resistance
Foundation dimensions feet (mm) Anchor bolt spacing feet (mm)
abAB
Ground/
Horizontal 0.4G,Vertical0.2 G5-3/4’ (1750) 3’ 1/8” (956)
Important reminder
If the foundation is smaller than the specified dimensions or if the designed earthquake resis-
tance value needs to be higher than that shown in the table above, appropriate design change
such as connecting the foundation to the building (floor slab) with steel rods is necessary. Such
design changes should be done in accordance with the appropriate building equipment seismic
tolerance design and installation policy.
Anchor bolts
8 (200)
1-13/32 (35)
Drainage grooves
Chamfered corners
on the concrete
A
(Foundation concrete)
Anchor bolts
Length: inch (mm)
a or more
B
b or more
(Foundation concrete)
(Anchor bolt
spacing)
(Anchor bolt
spacing)
>snoisnemidnoitadnuoF<>noitallatsnidnuorG<
2’ 8” (841)4’ (1100)

12
2) Anchor bolts
Required anchor bolt pull out resistance strength
Never use a female mechanical anchor because its
pull out resistance strength is insufficient.
Warning
 Use anchor bolts that satisfy the specifications shown in the table below. Make sure the legs of
the outdoor unit are firmly secured with washers and bolts.
If the strength is insufficient, the unit could tip over and cause fuel gas leakage or injury.
Size 3/8”
Short-term permissi-
ble pull-out load 6.7kN or more
Type
• Male mechanical anchor
• Resin anchor
• Embedded anchor
Anchor bolt
(Required locally)
Nut/Washers
(Required locally)
Foundation

Main Unit and Piping
Electrical
Test OperationReference
13
4. Refrigerant Piping
4. Refrigerant Piping
4-1. Outline diagram of refrigerant piping
[Combined installation]
[Stand-alone installation]

14
4-2.Refrigerant piping installation specifications
�Follow the restriction shown in the table below when installing new refrigerant piping.
[Combined installation]
*1 Refrigerant piping diameter: From the outdoor unit to the Combination Multi connection kit.
*2 When total capacity of connected indoor unit exceeds 130% of rated capacity, restrict the permissible piping length
(actual length) to 328ft or less.
[Stand-alone installation]
*1 If the piping length exceeds 328ft, install pipes larger by one rank specified in ( ).
*2 When total capacity of connected indoor unit exceeds 130% of rated capacity, restrict the permissible piping length
(actual length) to 328ft or less.
Outdoor Unit
(Combination Multi)
Item
Refrigerant piping diameter *1
inch (mm)
Permissible piping
length (m)
Equivalent length/
Actual length
Permissible height
difference (m) Refrigerant
oil
Va por lineLiquid line
Outdoor unit is
higher
Outdoor unit is
lower
623’ 5”/541’ 4”
(190/165*2)
623’ 5”/541’ 4”
190/165*2
164’
(50)
131’ 2”
(40)
164’
(50)
131’ 2”
(40)
NL10
15 ton 1-1/8” (ø28.6) 5/8” (ø15.9)
Outdoor Unit
Item
Refrigerant main piping diameter
inch (mm)
Permissible piping
length (m)
Equivalent length/
Actual length
Permissible height
difference (m) Refrigerant
oil
Va por lineLiquid line
Outdoor unit is
higher
Outdoor unit is
lower
NL10
15 ton 1-1/8” (ø28.6)
*1(ø31.8)
5/8” (ø15.9)
3/4” *1(ø19.1)

O.D.1-1/4” - I.D.1-1/8”
Main Unit and Piping
Electrical
Test OperationReference
15
4. Refrigerant Piping
�Reducer selection for combined installation
Item Mark Name
Vapor
refrigerant
Reducer Provided with the
outdoor unit
Copper pipe Locally required
Liquid
refrigerant
Reducer Provided with the
outdoor unit
Copper pipe ø5/8” Locally required
Combination Malti
connection kit
㧙Sold separately
RemarkSpecification (inch)
I.D. 5/8” - O.D. 1/2”
1-1/8”
(inch)
(inch)
I. D. 1-1/4” I. D. 5/8” I. D. 1-1/4” I. D. 5/8”
connection

16
Precautions for combined installation
Arrange the refrigerant piping for both liquid and vapor between the outdoor units so that the piping is level or
has upward gradient to prevent the refrigerant oil from accumulating in the piping.
Connect the refrigerant piping between the outdoor units to the stop valve as shown in the following figure A or
B. Otherwise, the refrigerant oil can accumulate in the piping.
Be sure to install the Combination Multi connection kit “horizontally” for both vapor and liquid.
lacitreVlatnoziroH
Floor
surface
Correct Wrong Wrong
Floor
surface
Floor
surface
Floor
surface
Wrong Wrong
Floor
surface
Do not raise the refregiration
lines after the stop valve.

FOR VAPOR PIPING ONLY, a 8” or more
rise could be added if needed. (See below)
Main Unit and Piping
Electrical
Test OperationReference
17
4. Refrigerant Piping
�Secure straight portion for 26” (660 mm) or more after branching of the Combination Multi connection kit.
�FOR VAPOR PIPING ONLY, if the connection piping length is 6-1/2’ or more, add a 8” or more rise within
6-1/2’ from the Combination Multi connection kit.
6-1/2’ (2 m) or less
6-1/2’ (2 m) or less
6-1/2’ (2 m) or more
6-1/2’ (2 m)
or less
8 inch (200 mm)
6-1/2’ (2 m) or less
6-1/2’ (2 m) or more
26” (660 mm)
or more

18
4-3.Refrigerant piping - Selecting branch pipes and permissible lengths
[Combined installation]
*Follow the piping specification shown below when installing new refrigerant piping. As for renewal specification,
when reusing existing piping, confirm that the existing piping meets the pipe specification shown.
�Make sure that the total extension refrigerant piping length is 1706ft or less.
�If the refrigerant piping equivalent length exceeds 328ft, use pipes with diameters larger by one rank for liquid
piping only.
Example: 3/4” ×7/8” (ø19.1 ×ø22.2)×
�
This unit uses R410A. Limit pressure of O material pipe with 3/4” (ø19.1) diameter or larger is insufficient. Be sure
to use 1/2H or H material pipes with minimum thickness or thicker. For 3/4” (ø19.1) pipe only, however, as long
as the thickness is 1.05 mm or thicker, O materials can be used.
�Do not use a bent pipe with an external diameter of 1-1/8” (ø28.6) or larger.
�Method of refrigerant piping can be selected from line branching, header branching, and line-header combined
branching. Select the proper method according to the layout of indoor units.
�Refrigerant piping length and the height difference between indoor units should be arranged as short as possi-
ble.
�Re-branching after the header branching is not allowed.
* If the refrigerant piping
equivalent length exceeds
328ft, use pipes with
diameter larger by one rank
indicated in ( ) for liquid
piping only.
Piping specifications
Piping material: Phosphate deoxidized copper seamless air-conditioning pipe
Refrigerant piping specifications:
Note) Should not exceed the outdoor unit main piping diameter.
* Detailed parameter of indoor unit capacity
)mm(hcnissenkcihTretemaidretuO
inch (mm) TYPE ACR (D)TYPE ACR (A) TYPE K
2/8” (6.35)- 0.03 (0.76) -
3/8” (9.52) 0.03 (0.76)0.032 (0.81) 0.035 (0.89)
1/2” (12.7) 0.035 (0.89)0.032 (0.81) 0.049 (1.24)
5/8” (15.88)- 0.035 (0.89) 0.049 (1.24)
3/4” (19.05)- 0.042 (1.07) 0.049 (1.24)
7/8” (22.22)- 0.045 (1.14) 0.065 (1.65)
1-1/8” (28.57)- 0.05 (1.27) -
1-3/8” (34.92)- 0.055 (1.40) -
1-5/8” (41.28)- 0.06 (1.52) -
(1) Interval from outdoor unit to the first branch (Distance
Outdoor unit 15 ton
Vapor line; inch (mm) 1-1/8” (ø28.6)
Liquid line; inch (mm) 5/8” (ø15.9)
(3) Interval from branch to branch (Distance B, C)
Total capacity
of down flow
indoor units
(Btu/h)Less than
76,000
76,000 or more
less than 112,000
112,000 or more
less than 160,000
160,000 or more
less than 234,000
(kW) Less than 22.4 22.4 or more less than 33.0 47.0 or more less than 68.633.0 or more less than 47.0
Vapor line; inch (mm) 5/8” (ø15.9)7/8” (ø22.2)1-1/8” (ø28.6)
Liquid line; inch (mm) 3/8” (ø9.5) 1/2” (ø12.7) 5/8” (ø15.9)
(4) Interval from branch to indoor unit (Distance a, b, c, d, e, f)
Indoor unit *7, 9, 12,18M
24, 30, 36, 42, 48, 54M
Vapor line; inch (mm) 1/2” (ø12.7)5/8” (ø15.9)
Liquid line; inch (mm) 1/4” (ø 6.4)3/8” (ø 9.5)
Model 48M
Btu/h 48,000
kW 14.1
42M
42,000
12.3
54M
54,000
15.8
72M
72,000
21.1
96M
96,000
28.2
36M
36,000
10.6
30M
30,000
8.8
24M
24,000
7.0
18M
18,000
5.3
12M
12,000
3.5
9M
9,000
2.6
7M
7,000
2.1
(2) [Main piping] Between Combination Multi connection kit
and first branch (A on the following page)
Total capacity of outdoor unit (kW) 112.0
Va por line; inch (mm) 1-1/2” (ø38.1)
Liquid line; inch (mm) 3/4” (ø19.1) [7/8” (ø22.2)]*

Main Unit and Piping
Electrical
Test OperationReference
19
4. Refrigerant Piping
�Selecting branch piping and permissible piping length
Line branching
*When total capacity of connected indoor unit exceeds 130% of rated capacity, restrict the permissible piping
length (actual length) to 328ft.
Important Reminder
�In the case of header branching or line-header
combined branching, indoor units with capacity of
96.000 Btu/h or larger cannot be connected after the
header branching (c, d, e or f in the right figure).
Connect the indoor units with capacity of 96.000 Btu/h or
larger to line branching (a or b in the right figure).
Layout example
(When 6 indoor units are
connected)
Note:If there is a height differ-
ence between the loca-
tions of indoor and
outdoor units, apply a
small “trap pipes” only
on the vapor line at least
every 32’ 10”(10 m) as illustrated.
X: 32’ 10” (10 m) or less
Y: 32’ 10” (10 m) or less
H1: See below
H2: 13’ 1”(4 m) or less
Permissible
piping
length
Maximum piping length (L)
(Equivalent length/ Actual length) 623/541 ft (190/165 m or less)f+E+D+C+B+A+X
Maximum piping length after the first branch ()
B + C + D + E + f197 ft (60mor less)
Piping length difference after the first branch
(when “a” is the shortest length after the first
branch)
- a
131 ft (40mor less)
131 ft (40mor less)
49 ft (15mor less)
164 ft (50mor less)
Permissible
height
difference
Height difference between indoor unit and out-
door unit (H1)
When outdoor unit is higher than indoor unit
When outdoor unit is lower than indoor unit
Height difference between indoor units (h)
Branch
piping
Use “BHFP22P90” as the Combination Multi connection kit.
How to select the branch piping kit
•Refer to the following table to select the branch piping kit because the size of branching pipe varies
depending on the total capacity of connected indoor units (total capacity of the downstream indoor units).
Classification Branch piping kit type
First branch for outdoor
unit capacity (ton) 15 ton
Second branch and
after for downstream
indoor unit total capacity
(Btu/h)
less than 76.000
76.000 or more
and less than 112.000 KHRP26A33T
KHRP26A73T
KHRP26A22T
KHRP26A73T
112.000 or more and
and less than 234.000 KHRP26A72T
234.000 or more
Important reminder:
•Be sure to use the indoor unit piping and indoor branch piping that correspond to the indoor unit connecting
piping size.
•Always install the branch piping joint (both for vapor and liquid) so that the joint branches either horizontally
or vertically. (Refer to “4-5. Notes for branch piping” on page 30).
32’ 10”
(10 m)

20
Header branching
*When total capacity of connected indoor unit exceeds 130% of rated capacity, restrict the permissible piping
length (actual length) to 328ft.
Layout example
(When 6 indoor units are
connected)
Note:If there is a height differ-
ence between the loca-
tions of indoor and
outdoor units, apply a
small “trap pipes” only on
the vapor line at least
e
very 32’ 10” (10 m) as illustrated.
X: 32’ 10” (10 m) or less
Y: 32’ 10” (10 m) or less
H1: See below
H2: 13’ 1” (4 m) or less
Permissible
piping
length
Maximum piping length (L)
(Equivalent length/Actual length) f+A+X
Maximum piping length after the first branch ()
f197 ft (60mor less)
Piping length difference after the first branch
(when “a” is the shortest length after the first
branch)
- a
Permissible
height
difference
Height difference between indoor unit and out-
door unit (H1)
When outdoor unit is higher than indoor unit
When outdoor unit is lower than indoor unit
Height difference between indoor units (h)
Branch
piping
Use “BHFP22P90” as the Combination Multi connection kit.
How to select the header piping kit
•Connect crimp piping (locally required) to the branching points (on the indoor unit connection side) in
accordance with the number of connected indoor units.
•Refer to the header branching kit (sold separately) for the crimp piping size.
Total capacity of down-
stream indoor units (Btu/h) Header kit type Number of branches
less than 76.000
76.000 or more
and less than 112.000 KHRP26M33H
KHRP26M22H
Up to 8 branches
Up to 4 branches
112.000 or more
and less than 234.000 KHRP26M72H
KHRP26M73H234.000 or more
Important reminder:
•Be sure to use the header branching and indoor unit piping that correspond to the indoor unit connecting
piping size.
•Always install the header branching joint (both vapor and liquid sides) so that the joint branches
horizontally. (Refer to “4-5. Notes for branch piping” on page 30).
•Re-branching after the header branching is not allowed. Besides, the indoor unit with capacity of
96.000 Btu/h or larger can not be connected after the header branching.
32’ 10”
(10 m)
623/541 ft (190/165 m or less)
131 ft (40mor less)
131 ft (40mor less)
49 ft (15mor less)
164 ft (50mor less)