SLIMDUCT RD
TM
SLIMDUCT
Design & Installation Guide
Design & Installation Guide
INABA DENKO PRODUCTS DIVISION
OVERSEAS SALES DEPARTMENT
inabadenko-overseas@gr-inaba.com
http://www.INABA-DENKO.com/
CAT NO.201211
TM
Ell
Bracket
Wall Penetration Construction
Installation Step / Duct
Specifications
Caution
SLIMDUCT RD Design & Installation Manual
Caution
SLIMDUCT RD Design and Installation
INABA DENKI offers SLIMDUCT RD to meet the ever more sophisticated needs of comfortable environment
and space.
SLIMDUCT RD enables to fit multiple linesets into a simple container. SLIMDUCT RD is an innovative
lineset ducting system for VRF installations to accommodate the diversified requirements such as the less
space and construction period while enhanced the sleek appearance.
“SLIMDUCT RD Design & Installation”manual is a guide for the proper and reasonable use. Read through
the manual to make comfortable environment and space.
For all SLIMDUCT RD series
Refer to“SLIMDUCT RD Design & Installation”manual before use.
SLIMDUCT RD IS NOT WATERPROOF. To waterproof, use RDB DUCT BASEPLATE, RSP WALL PLATE
or RSB WALL SLEEVE and seal all penetrations with weatherproof sealant or putty.
For SLIMDUCT RD - WALKWAY type
Do not walk on SLIMDUCT RD Walkway type on a regular basis as it was designed only as a walkway to
facilitate periodic maintenance of AC outdoor unit at irregular intervals.
Coupler
Do not walk on the joint and end of ducts where anti-slip tape is not coated.
Baseplate
Reducer
Attach brackets to RDWN duct only at cross strut, not at coupler. For Ells, REWN, RFWN & RTWN, attach
brackets to all standard and supplementary cross struts and anchor them to roof surface. For Cross, RXWN,
attach 3 brackets to bottom plate.
Telescopic Coupler
Always wear gloves and a helmet for your safety when walking on RDWN duct.
Depending on the frequency of use, the anti-slip may wear away over a period of 5 to 8 years. Always
replace the RDWN duct cover whenever any of the edges become torn up or the surface shows signs of
wear.
For SLIMDUCT RD-ZA series
Although ZAM, like hot dip galvanizing, is subject to white rust, this will actually form a protective coating
and will not materially affect the corrosion resistance.
Although ZAM, like hot dip galvanizing, is subject to black tarnishing, this will not materially affect the
corrosion resistance.
Connection with AC Outdoor Units
Black soot on the welded part of screws at duct inside is not pro-oxidant and has no problem in use.
Although the edges may show early traces of red rust as they are exposed to the elements, over a period of
several months these will become coated with a zinc based film which leaches from the base layer and will
change to a grayish black, providing a high level of corrosion protection for the edges.
Always use safety protection gear（drop cloth, gloves & goggles）during installation.
Inevitable abrasion or scratching which might happen during manufacturing process will not materially affect
the corrosion resistance, as base steel would never be exposed.
When cutting duct on site, always repair cut edges with a coat of Zinc Chromate paint（ZN-AL）
.
Caution 1
SLIMDUCT RD Design & Installation Manual
Bracket
Ell
Coupler
■ Caution during Handling
1）Do not damage the surface of the duct or fittings.
2）Do not store the duct or fittings directly on bare ground. When storing on ground, always use a spacer
material other than wood to elevate the product.
3）Avoid handling piled-up product in rain.
4）Cover all material before and after installation with a protective cover to prevent any damage from any
alkaline liquids or metal shavings from copper pipe cutting operations nearby.
Wall Penetration Construction
■ White Rust on ZA Type Duct
The coating layer on high grade corrosion resistant hot dip galvanized steel sheet contains Zinc which
offers a higher degree of ionization, preventing white rust（Zinc Hydroxide）from eroding the base steel at
cut edges and at any point where the surface has been damaged by abrasion or scratching.
The surface of the coating layer reacts to carbon dioxide and water in air and is formed zinc oxide（white
rust）which protects the surface of the metal coating and suppresses the progress of corrosion. The zinc
oxide（white rust）is formed evenly over the surface of the metal coating.
In the case of accelerating to be formed by dew condensation etc. and damaging the surface protection,
the zinc oxide（white rust）is formed in a limited area in a short time of two hours.
It is important not to damage the surface protection coating during installation and storage in order to
maintain long term corrosion resistance.
Installation Step / Duct
■ Change in Appearance of ZA Type
The surface of a high grade corrosion resistant hot dip galvanized steel sheet is formed of a precise coat
of oxide which protects the surface of the metal coating and comprises 2 layers as follows :
1. A film of Zinc which contains Magnesium & Aluminum.
2. A second film of Zinc which contains Magnesium.
The thin film makes zinc glitter by the transmitted light. Over a period and environmental influence, the coat
of oxidize will thicken and not allow the light to pass through, so the surface of the metal coating will
change into grayish black. The phenomenon is called black tarnishing.
Specifications
For SLIMDUCT RD-ZA series
Caution
Caution
Telescopic Coupler
Licensing
Baseplate
Caution 2
Connection with AC Outdoor Units
Read the following condition before use of the data on this catalog. When you do not agree with this condition,
do not use the data. In your using data, we assume you consented to this licensing condition.
Use the data on this catalog exclusively with the design study for INABA DENKO products.
The data on this catalog is not guaranteed the specification of INABA DENKO products. Inaba Denki
Sangyo shall not be liable for any loss or damage either special or consequential arising out of any use,
function, or service of the data on this catalog.
Values shown in the drawing and list on this catalog are for reference purposes only, and all figures shown
are not guaranteed.
Data in this catalog is subject to change for product improvement without notice.
Any falsification, reprinting, or distribution is strictly prohibited without permission from the catalog
administrator.
Take full responsibility for your actions to use this catalog.
Reducer
■ Caution during Storage
1）Store the product in ventilated indoor.
2）When storing outside, always elevate the product from well drained ground.
3）If material is stored outside, protect from rain with a waterproof cover and remove this when rain stops. If
material is to be shipped by ocean freight, do not permit material to become exposed to sea water
during shipping, handling or storage at dockside.
4）When storing piled-up product, always use a spacer material other than wood to elevate the product and
make more room between product and ground.
Caution
SLIMDUCT RD Design & Installation Manual
Specifications
Specifications
Material
Installation Step / Duct
Material
Surface
Treatment
Salt
Tolerance
Coating Volume
Tensile Strength
Stretch
−
Salt Resistant
Specification
190g/m2
or more
at one side
274.6N/mm2
（28kgf/mm2）
or more
28%
or more
High Grade Corrosion Resistant Hot Dip
Galvanized Steel Sheet ZAM
Zinc
6% Aluminium
3% Magnesium
（ ）
Wall Penetration Construction
Maximum Load Capacities
a. Maximum Load for Duct Base and Brackets
SLIMDUCT RD Capacity（per 2M）
Item
2 Meter bracket spacing RZ BRACKET
1 Meter bracket spacing RZ BRACKET
SLIMDUCT RD
Bracket
SLIMDUCT RD
Bracket:RZ
（RZB+RZM）
Bracket:RZ（RZB+RZM）
1010
Telescopic Coupler
Coupler
Ell
Duct size
1010
2020
RD-150
12548N（1280kgf）
9387N（958kgf）
RD-300
5281N（ 539kgf）
3929N（401kgf）
RD-450
3448N（ 352kgf）
2546N（260kgf）
RD-600
2513N（ 256kgf）
1837N（187kgf）
RD-900
1552N（ 158kgf）
1102N（112kgf）
RD-450H
3396N（ 347kgf）
2494N（255kgf）
RD-600H
2461N（ 251kgf）
1785N（182kgf）
RD-900H
3076N（ 314kgf）
2231N（228kgf）
b. Maximum Load for Duct Cover
Condition : Data is based on complete assembly of base and cover, and in case of size 450 & 600,
additional reinforcement plate.
Cover Loading
Baseplate
Reducer
Specification
per 1m2
Stress level on 200m × 100mm loading plate
Standard Type
4,903N/m2（500kgf/m2）or less
98N
（10kgf）or less
Walkway Type
49,030N/m2（5,000kgf/m2）or less
980N
（100kgf）or less
Connection with AC Outdoor Units
c. Maximum Load for Brackets
When brackets are fastened with 4 bolts tightened to the torque
specification in column 1, column 2 shows the maximum allowable
load before the RZM & RZB bracket/riser combination will shift and
fail.
1
Torque
Shift Starting Load（4 bolts）
29.4J
（300kg-cm）
6,374N
（650kgf）
Load
SLIMDUCT RD Design & Installation Manual
Caution
Installation Step / Duct
Specifications
Installation Step
・Make pipe shaft and wall penetration hole.
2. Set bracket
・Select the size of bracket.
・Assemble RZM and RZB bracket / riser.
・Set the bracket in place.
3. Fix temporarily
・Fix the base of duct and fittings temporarily.
・Cut the duct if required.
・Apply anti-rust treatment.
4. Secure the base
・Secure the bracket and the base of duct and fittings.
・Select coupler.
・Fix coupler.
・Install END CAP REC.
5. Piping
・Attach RAH HANGER SUPPORT for SLIMDUCT UD, RZY
DOUPLEX BRACKET, and RDK RD LINESET SUPPORT STRUT.
・Install the piping inside the channel formed by the base.
・Put RAH HANGER SUPPORT for SLIMDUCT UD.
・Fit in SLIMDUCT UD and make branch.
6. Lock in place the cover
・Lock in place the covers of duct and fittings.
・Install WALL FLANGE RWP.
7. Finish
・Seal all penetrations with weatherproof sealant or putty.
Installation Step / Duct
1. Create wall inlet
Wall Penetration Construction
Bracket
Ell
Coupler
Duct Size Selection
Duplex
Reducer
Ref
Standard
（simplex）
Telescopic Coupler
To select the duct size, refer the condition of wall inlet
（pipe shaft etc.）
, diameter and quantity of pipe, space for
ducting and maintenance, and application.
2 applications of standard（simplex）and duplex enable
SLIMDUCT RD to be customized.
Design the layout of SLIMDUCT RD Walkway type RDWN
to facilitate periodic maintenance of AC outdoor unit at
irregular intervals.
Refer the table for lineset capacity of SLIMDUCT RD on the website.
Baseplate
Caution Use RZY with L or LL type of RZB and RZM for duplex mountings.
This is an optional accessory except size 900.
■ Duct Section
（mm）
Width
A
Height
B
Cover
C
150
300
300H
450
450H
600
600H
900
900H
150
300
300
450
450
600
600
900
900
111
131
251
131
251
131
251
131
251
−
20
20
20
20
20
20
20
20
150
300∼600
Connection with AC Outdoor Units
Duct size
2
Caution
SLIMDUCT RD Design & Installation Manual
Specifications
Wall Penetration Construction
Installation at Pipe Shaft or Wall Penetration
Installation Step / Duct
SLIMDUCT RD IS NOT WATERPROOF. For external use, SLIMDUCT RD is required the waterproof
treatment as follows.
Caution
Installation A
These methods are given only as examples. Follow detail instructions of a site supervisor.
Size 150 : WALL FLANGE RWP
Wall Penetration Construction
For size 150, use WALL FLANGE
RWP and 45°VERTICAL ELL RCF
to waterproof at wall penetration.
Seal the wall penetration with
mortar or putty, and caulk all
lateral and longitudinal seams and
screw heads of WALL FLANGE
RWP.
Installation B
A
Caulking
WALL FLANGE
（RWP）
Putty + Caulking
or
Mortar + Caulking
VERTICAL ELL
（RC / RCF）
VERTICAL ELL
（RC / RCF）
WALL FLANGE
（RWP）
Size 300∼900（H）: CUT-OFF WALL PLATE RSP-A with WALL FLANGE RWP
Use in combination with CUT-OFF WALL PLATE RSP-A, WALL FLANGE RWP, 45°VERTICAL ELL
RCF for waterproof.
Unit：
（mm）
CUT-OFF WALL PLATE
Bracket
B
（RSP-A）
300
450
600
300H
450H
600H
900H
Ell
1. Create an opening referring to its
dimensions list at right.
VERTICAL ELL
（RC / RCF）
Coupler
Height
of opening
Size
WALL FLANGE
（RWP）
118
238
Width
of opening
300
450
600
300
450
600
900
※ Height of opening is under review.
B
D
＜900H＞
Unit：
（mm）
Size
A
B
C
D
300
364
160
450
54 310 192 514
600
664
400
300H
364
160
450H 117 310 312.4 514
600H
664
400
312
117
C
＜300
（H）・450
（H）・600
（H）
＞
A
Telescopic Coupler
2. Drill holes for the tapping
screws or hammer anchor
bolts against openings.
The hole pitch size is shown
in the right.
320
485
650
964
Baseplate
Reducer
3. Screw into 2 places of center top and
4. Set the base of Wall Flange, Vertical Ell, and Duct,
bottom of RSP-A.
second install the piping inside the channel formed by the
For size 900H, tighten screws at total 4
base, finally lock in place the covers of each segment.
places as each 2 places of top and
WALL FLANGE Cover
CUT-OFF
bottom.
WALL PLATE
Connection with AC Outdoor Units
VERTICAL ELL Cover
WALL FLANGE Base
VERTICAL ELL Base
5. Apply caulking treatment all lateral and
longitudinal seams and screw heads of
CUT-OFF WALL PLATE RSP-A and
WALL FLANGE RWP with waterproof
sealant.
Caulking
Caulking
3
Caulking
WALL FLANGE RWP
SLIMDUCT RD Design & Installation Manual
Caution
Bracket
Specifications
Bracket Size Selection
■ Bracket Selector Table : 150
AC
outdoor unit
Duct
Pipes
Base
Height
280mm∼480mm
480mm∼710mm
710mm∼940mm
Wall Penetration Construction
Item No.
RZ-150-M
RZ-150-L
RZ-150-LL
Bracket
Installation Step / Duct
Size 300∼900 gives the required height to select the combination
of 5 sizes of bracket RZM（S/MS/MM/M/L）and 4 sizes of riser
RZB（S/M/ML/L）
.
Size 150 has 3 sizes of a single prefabricated bracket（M/L/LL）
.
Select the combination of bracket and riser referring to the height
of obstruction, AC outdoor unit, and pipe outlet.
■ Bracket Selector Table : 300
（H）
・450
（H）
・600
（H）
・900
（H）
Height
（mm） RZM-S Type
950
RZM-MS Type
940
850
800
790
750
750
RZB-L
650
600
640
590
RZB-L
630
RZB-ML
600
RZB-L
RZB-L
540
540
540
540
540
350
480 RZB-ML
450
P
380
200
150
350
330
RZB-M
320
RZB-M
270
RZB-M
230
350
RZB-S
330
330
350
※Notation
RZB-S
280
230
270
H2
230
RZB-○
RZB-S
180
480
180
H1
RZB-S
Telescopic Coupler
250
480
RZB-M
RZB-ML
350
480
RZB-ML
420
400
RZB-ML
300
540
RZB-S
Coupler
P
RZB-M
530
Ell
550
400
306
456
626
926
RZB-L
730
700
450
■ Anchor Interval
RZM-L Type
900
Riser
（RZB）
Size
RZM-M Type
500
Bracket
（RZM）
300
450
600
900
RZM-MM Type
Bracket
●To select the combination of
bracket and riser which gives
the required height, refer to the
list at right.
●If several combinations of
bracket and riser give the
desired height, the combination
found in the column closest to
the height will give the most
practical selection.
●The combination of S Type RZB
Risers and S Type RZM
Brackets is only used for vertical
wall mounted applications.
H2
Bracket（RZM）
H1
Riser（RZB）
130
100
■ Duplex Installation
Height of RZY : H1
BRACKET for RD DUCT RZM-L/LL
Reducer
H1（ using standard duct RD）
＝160mm∼（H−250）mm
● H1
（ using H type duct RD）
＝160mm∼（H−350）mm
●
RISER for RZM BRACKET RZB
H1
H
DUPLEX BRACKET RZY
Baseplate
Maximum Load
Torque
29.4N・m
（300Kg・cm）
Connection with AC Outdoor Units
When brackets are fastened with 4 bolts tightened to the torque
specification in column 1, column 2 shows the maximum
allowable load before the RZM & RZB bracket/riser combination
will shift and fail.
Load
Shift Starting Load（4 bolts）
6,374N
（650Kgf）
4
Specifications
Caution
SLIMDUCT RD Design & Installation Manual
Installation Step / Duct
Installation Interval and Anchorage Position
Caution
Bracket installation position shown in this catalog is general description.
The number and position of brackets is to be changed depending on shape and size of
ells or installation methods. Decide the proper bracket spacing referring to the page of
each fitting in this catalog.
a. Installation Interval
Wall Penetration Construction
The basic installation of bracket is at the
interval of 1,010mm or 2,020mm.
Adjust the bracket space in accordance
with the piping weight.
※Take 1,010mm interval for the installation of
SLIMDUCT RD Walkway type. Attach brackets to
RDWN duct only at cross strut, not at coupler.
※For Duct, secure brackets at 2 places. Attach
brackets to Coupler（RSJ-A/RFJ-A）in the
bracket interval of 2,020mm.
AC
outdoor
unit
b. Bracket Anchorage Position
Bracket
Bracket can fix with cross strut, duct base, coupler（only with stand fixed plate）
, supplementary
cross struts, and bottom plate. The place of bracket will change depending on duct size or
application.
■ Installation on Duct
Ell
Installation on cross strut
Installation on duct joint
W3/8 Hex bolt
Coupler
W3/8 Hex bolt
Stand fixed plate
provided with COUPLER
Telescopic Coupler
Cross strut
Bracket
W3/8 Hex nut
Bracket
W3/8 Hex nut
■ Installation on ELL
Reducer
A
Installation Cross
Strut
Baseplate
Attach two brackets on cross strut of FLAT
ELL.（Bracket can be attached to the cross
strut with a built-in locknut only by tightening
screws.）
※ Refer Walkway type to Installation D.
Installation B Joint /
Supplementary Cross Strut
Attach brackets to the joint of duct and fittings
with stand fixed plate provided with couplers.
Install a bracket on supplementary cross strut
of ells to prevent deflection. RZ-150 can be
used for this purpose.
Supplementary cross strut
Connection with AC Outdoor Units
Cross strut
Stand fixed plate
5
SLIMDUCT RD Design & Installation Manual
Caution
Specifications
C
Installation Baseplate
Size 150
Installation Step / Duct
For size 150 ells, attach brackets to the included
baseplate. Use RZ-150 or other size of RZM &
RZB bracket/riser combination.
Wall Penetration Construction
D
Installation Walkway
Type
For Walkway type Ells, REWN, RFWN & RTWN,
Attach 3 brackets to all cross struts（including
supplementary cross struts）
.
Bracket
Supplementary cross strut
Ell
Coupler
Telescopic Coupler
Light & durable
Versatile mounting block for pipes,
cables or condensers
Multiple Use Support System
PLABASE
RECYCROCK
Reducer
Resin Pocket for Duct Brackets
Baseplate
PB-120
Connection with AC Outdoor Units
PB-100
4 sizes : Length 150∼600mm
150 type
500 type
6
Specifications
Caution
SLIMDUCT RD Design & Installation Manual
E
Installation CROSS
Size 900 : RX-900
（H）& RXWN-900
（H）
Installation Step / Duct
This fitting can be used as 90°FLATT ELL or TEE. Close unused openings with the attached plates.
① Preliminary set brackets RZM & RZB.
※RX-900（Ｈ）
Bracket RZ
（option）
Wall Penetration Construction
Set 2 brackets（RZM + RZB）
.
※RXWN-900（Ｈ）
Bracket RZ
（option）
Set 3 brackets（RZM + RZB）
.
926
450
926
600
450
② Attach the included baseplate to brackets with W3/8”bolts.
Baseplate
Bracket
※RX-900（Ｈ）
Baseplate
※RXWN-900（Ｈ）
③ Fix corner posts to the included baseplate with M6 hex bolts.
※RX-900（Ｈ）
※RXWN-900（Ｈ）
Corner post
Telescopic Coupler
Coupler
Ell
Corner post
④ Connect duct with more than 10mm insertion into cross base at each end（10mm ∼ 40mm）
.
※RX-900（Ｈ）
※RXWN-900（Ｈ）
Baseplate
Baseplate
Reducer
Baseplate
Caution
Baseplate
Connection with AC Outdoor Units
For application to connect the smaller size
branch duct to cross, install RXR
REDUCER SIZE 900（option）first.
REDUCER RXR
※Height of stand for RX / RXWN is 30mm lower than ducting.
※Seal the gap between cross and duct with caulk or putty.
※For duct RD to insert into cross, attach RDH REINFORCEMENT PLATE for DUCT at end.
7
SLIMDUCT RD Design & Installation Manual
Caution
Specifications
Installation F
VERTICAL ELL + RZC
■ Height of Bracket
Caution
●
●
●
●
Installation Step / Duct
Creating a vertical offset in duct, RZC BRACKET ATTACHMENT PLATE for VERTICAL ELL is
attached to bracket.
Calculate the height of bracket（H2）to select the bracket size using formula and table below.
The formula to calculate exact height of bracket is different between 45°and 90°vertical ell.
Table 1 shows the figures using RSJ-A.
When it is difficult to find the accurate level difference between two elbows, use the adjustable
TELESCOPIC COUPLER RSS shown in Table 2.
Refer dimensions of ells on page 9-10.
Size 300∼600（H）: 90°VERTICAL ELL
Size 900（H）: 90°VERTICAL ELL
Wall Penetration Construction
90°OUTSIDE VERTICAL ELL RCO
Duct RD
90°INSIDE VERTICAL ELL RCI
30
Bracket
Bracket 1
A
30
H2
Size B : with Coupler RSJ-A
130
250
130
250
130
250
430
550
430
550
430
550
P1
Size
900
900H
■ Table 2
H1
H−30
H−30
P2
P3
P4
H2
H3
P1
H−598 H−568
（180）
H−718 H−688
P2
210
240
P3
190
250
P4
（210）
（240）
Telescopic Coupler
Size A
Coupler
Size
300
300H
450
450H
600
600H
Ell
Bracket RZ
■ Table 1
H3
H
Duct RD
H1
Bracket 2
※Values shown in the list are for reference purpose only.
Size A
130
250
130
250
130
250
RSS-1
RSS-2
RSS-3
430∼530
550∼650
430∼530
550∼650
430∼530
550∼650
530∼630
650∼750
530∼630
650∼750
530∼630
650∼750
630∼730
750∼850
630∼730
750∼850
630∼730
750∼850
Reducer
Size
300
300H
450
450H
600
600H
Size B: with Telescopic Coupler RSS
Baseplate
45°VERTICAL ELL
■ Table 1
Bracket 2
Bracket 1
300
300H
450
450H
600
600H
900H
■ Table 2
Size B :
Size
with Coupler RSJ-A
A
130
250
130
250
130
250
250
193
228
193
228
193
228
228
Size
Size A
300
300H
450
450H
600
600H
900H
130
250
130
250
130
250
250
Connection with AC Outdoor Units
Size
Size B: with Telescopic Coupler RSS
RSS-1
RSS-2
RSS-3
193∼263
228∼298
193∼263
228∼298
193∼263
228∼298
228∼298
263∼333
298∼368
263∼333
298∼368
263∼333
298∼368
298∼368
333∼403
368∼438
333∼403
368∼438
333∼403
368∼438
368∼438
8
Caution
SLIMDUCT RD Design & Installation Manual
Specifications
Ell
Dimensions
Installation Step / Duct
Two or more consecutive ells connection may raise some deviation.
Dimension 1 FLAT ELL + RSJ-A
Unit : ㎜
45°FLAT ELL RF : Top View
90°FLAT ELL RE : Top View
Wall Penetration Construction
Size
150
300
300H
450
450H
600
600H
900
900H
Caution
A
150
300
300
450
450
600
600
B
370
720
720
870
870
1020
1020
Refer to Dimension 2
Size 900
（H）differs in form.
Caution
90°VERTICAL ELL RC : Side View
Ell
Bracket
Size
150
300
300H
450
450H
600
600H
900
900H
Coupler
Caution
Size
150
300
300H
450
450H
600
600H
900
900H
C
350
700
700
850
850
1000
1000
A
110
130
250
130
250
130
250
B
330
430
550
430
550
430
550
A
150
300
300
450
450
600
600
B
155
389
389
433
433
484
484
Refer to Dimension 2
Size 900
（H）differs in form.
45°VERTICAL ELL RCF : Side View
C
310
410
530
410
530
410
530
Size
150
300
300H
450
450H
600
600H
900H
Refer to Dimension 2
A
110
130
250
130
250
130
250
250
B
145
193
228
193
228
193
228
228
Unit : ㎜
1217
Baseplate
980
※ Use RX-900
（H）as flat ell for size 900
（H）
.
90°VERTICAL ELL RC-900
（H）: Side View
A
30
Size
900
900H
A
138
258
30
A
B
C
B
598
718
C
558
678
40
900
900
45°FLAT ELL RF-900
（H）: Top View
548
900
Reducer
990
900
Telescopic Coupler
90°FLAT ELL RX-900
（H）: Top View
Connection with AC Outdoor Units
C
332
444
528
444
528
444
528
528
Size 900
（H）differs in form.
Dimension 2 Size 900
9
C
355
919
919
1050
1050
1148
1148
SLIMDUCT RD Design & Installation Manual
Caution
Caution
Specifications
Dimension 3 FLAT ELL + RSS
Unit : ㎜
Size 900
（H）can use RSS only with RCF-900H due to the different shape.
90°FLAT ELL RE : Top View
300
300H
450
450H
600
600H
A
300
300
450
450
600
600
45°FLAT ELL RF : Top View
B
720∼ 820
820∼ 920
920∼1020
720∼ 820
820∼ 920
920∼1020
870∼ 970
970∼1070
1070∼1170
870∼ 970
970∼1070
1070∼1170
1020∼1120
1120∼1220
1220∼1320
1020∼1120
1120∼1220
1220∼1320
C
Size
700
300
700
300H
850
450
850
450H
1000
600
1000
600H
90°VERTICAL ELL RC : Side View
300
450
600H
130
250
130
250
450
600
600
B
430∼530
530∼630
630∼730
550∼650
650∼750
750∼850
430∼530
530∼630
630∼730
550∼650
650∼750
750∼850
430∼530
530∼630
630∼730
550∼650
650∼750
750∼850
C
410
300H
530
450
410
450H
530
600
410
600H
530
900H
RSS
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
A
130
250
130
250
130
250
250
B
193∼263
263∼333
333∼403
228∼298
298∼368
368∼438
193∼263
263∼333
333∼403
228∼298
298∼368
368∼438
193∼263
263∼333
333∼403
228∼298
298∼368
368∼438
250∼298
320∼368
390∼438
Dimension 4 FLAT ELL + RFJ-A/RSJ-A + DUCT
C
444∼514
514∼584
584∼654
528∼598
598∼668
668∼738
444∼514
514∼584
584∼654
528∼598
598∼668
668∼738
444∼514
514∼584
584∼654
528∼598
598∼668
668∼738
560∼598
620∼668
690∼738
Telescopic Coupler
600
250
450
Coupler
450H
130
300
C
919∼ 989
989∼1059
1059∼1129
919∼ 989
989∼1059
1059∼1129
1050∼1120
1120∼1190
1190∼1260
1050∼1120
1120∼1190
1190∼1260
1148∼1218
1218∼1288
1288∼1358
1148∼1218
1218∼1288
1288∼1358
Ell
300H
A
300
B
389∼459
459∼529
529∼599
389∼459
459∼529
529∼599
433∼503
503∼573
573∼643
433∼503
503∼573
573∼643
484∼554
554∼624
624∼694
484∼554
554∼624
624∼694
Bracket
300
RSS
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
A
45°VERTICAL ELL RCF : Side View
Size
Size
RSS
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
Wall Penetration Construction
RSS
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
Installation Step / Duct
Size
Unit : ㎜
45°FLAT ELL RF : Top View
300, 300H
x = 2 × W ー 570
L = W + 530
H
150
L
Size
Connection with AC Outdoor Units
W
Formula
x = 2 × W ー 239.7
L = W + 200
x
x
L
45°VERTICAL ELL RCF : Side View
Baseplate
Size
Reducer
Use table below to calculate exact length of diagonal duct required to produce desired offset.
x indicates the length of duct which is cut duct RD to suit.
Formula
450, 450H
x = 2 × W ー 632
L = W + 617
150
x = 2 × H ー 255
L = H + 187
600, 600H
x = 2 × W ー 704.5
L = W + 664
300, 450, 600
x = 2 × H ー 291.8
L = H + 251
900, 900H
x = 2 × W ー 685.9
L = W + 705.9
300H, 450H, 600H, 900H
x = 2 × H ー 342.4
L = H + 300
※Size 900 & 900H require an extra 20mm to be added to duct length to allow for 10mm insertion into elbow at each end.
10
Caution
SLIMDUCT RD Design & Installation Manual
Specifications
Coupler
Installation Step
Installation Step / Duct
COUPLER RSJ-A
①Attach RSJ base at 20mm space
between each duct end.
Wall Penetration Construction
Every RSJ base is
provided with ditch guide
which can be aligned
with its inner cover to
prevent RSJ inner cover
from sliding down when
it is mounted vertically.
Install ditch guide of RSJ base
facing upward.
②To connect RZ brackets on the joint,
use RSJ included stand fixed plate.
Use stand fixed plate only when
bracket is attached at the joint.
M6 Flange nut
Bush
Truss screw M6×15L
3 bolt × 25L
W 8
Stand fixed plate
Coupler
Ell
Bracket
20㎜
Telescopic Coupler
③After lineset installation, insert RSJ
inner cover into ditch guide and
upper part of duct base.
Inner cover
Inner cover
Baseplate
Reducer
Ditch guide
Connection with AC Outdoor Units
④Place duct cover and fix RSJ outer
cover.
Truss screw M6×20L
Resin washer
Outer cover
11
SLIMDUCT RD Design & Installation Manual
Caution
Specifications
FREE COUPLER RFJ-A
20㎜
Install ditch guide of RFJ base
facing upward.
Resin washer
Truss screw M6×20L
Wall Penetration Construction
Every RFJ base is
provided with ditch guide
which can be aligned
with its inner cover to
prevent RFJ inner cover
from sliding down when
it is mounted vertically.
Installation Step / Duct
①Make 20mm space between each duct
end and attach 2 pieces of RFJ base
to hold from both sides of duct.
※For vertical application, use RFJ exclusively
with direct to wall.
②To connect RZ brackets on the joint,
use RFJ included stand fixed plate.
Use stand fixed plate only when
bracket is attached at the joint.
3 bolt × 25L
W 8
Stand fixed plate
Bracket
Ell
Coupler
Inner cover
Ditch guide
Telescopic Coupler
③After lineset installation, insert RSJ
inner cover into ditch guide and
upper part of duct base.
Inner cover
Reducer
Baseplate
④Place duct cover and fix RFJ outer
cover.
Truss screw M6×20L
Resin washer
Connection with AC Outdoor Units
Outer cover
12
Caution
SLIMDUCT RD Design & Installation Manual
Specifications
Telescopic Coupler
Installation Step
Installation Step / Duct
TELESCOPIC COUPLER RSS
①Place temporarily or install duct / ell. Select the suitable RSS according to the differential level B
from pipe shaft (between the inner surface bottom of RWP base flange and bottom of latitudinal
duct) or the space L between ducts / ells.
Space between ducts
L（mm）
Wall Penetration Construction
TELESCOPIC COUPLER Item No.
RSS-300-1/450-1/600-1/900-1
20∼120
RSS-300-2/450-2/600-2/900-2
120∼220
RSS-300-3/450-3/600-3/900-3
220∼320
RSS-300H-1/450H-1/600H-1/900H-1
20∼120
RSS-300H-2/450H-2/600H-2/900H-2
120∼220
RSS-300H-3/450H-3/600H-3/900H-3
220∼320
Bracket
※Refer to page 10 to calculate the size of RSS from the height B of diagonal duct.
Coupler
Ell
Space between ducts L（mm）
L
Reducer
Telescopic Coupler
L
Baseplate
②Attach RSS base to duct or ell base.
Set RSS ditch guide at the center of joint opening.
45°VERTICAL ELL Base
Connection with AC Outdoor Units
COUPLER Base
20㎜
L
M6 Flange nut
TELESCOPIC COUPLER RSS Base
Ditch guide
Bush
Truss screw M6×20L
45°VERTICAL ELL Base
13
SLIMDUCT RD Design & Installation Manual
Caution
Specifications
③Install RSS baseplate
and bracket.
TELESCOPIC COUPLER Baseplate
Flat washer
M6 Hex nut
Installation Step / Duct
W 3 8 Hex bolt ×25L
Resin washer
Hex bolt M6×12L
Stand fixed plate
W 3 8 Flat washer
W 38 Hex nut
BRACKET ATTACHMENT
PLATE for VETICAL ELL
Wall Penetration Construction
W 3 8 Flat washer
W 3 8 Hex nut
※Caution : TELESCOPIC COUPLER Baseplate
Cut
Bracket
When connecting RSS to 2m or 1m lengths of duct RD or to
45°
elbow RCF, the included baseplate can be used. If RSS
needs to be connected to any other fitting, RSS baseplate will
have to be purpose processed on site. Use bracket to support
RSS baseplate.
Ell
Coupler
④After lineset installation, insert RSS
inner cover into ditch guide and upper
part of duct base.
Inner cover
Telescopic Coupler
Reducer
⑤Place duct cover and install RSS outer
cover and its splint.
WALL FLANGE Cover
Baseplate
45°VETICAL ELL Cover
Outer cover
Connection with AC Outdoor Units
Truss screw M6×20L
Resin washer
Duct cover
Resin washer
Truss screw
M6×20L
14
Caution
SLIMDUCT RD Design & Installation Manual
Specifications
Reducer
Installation Step
Installation Step / Duct
REDUCER RR［Except : RR-300H-150, RR-450H-300, RR-600H-300］
①Install bracket to secure with a
corresponding φ12 hole on end of
RD bigger duct. Attach RR base to
duct base as shown in the right.
Bigger duct
Truss screw
M6×15L
Wall Penetration Construction
Bush
REDUCER Base
3
W 8 bolt ×25L
Bracket
M6 Flange nut
②Attach smaller duct to RR base.
After lineset installation, insert RR
inner cover into ditch guide.
Ell
Bigger duct
Coupler
Inner cover
Bush
Telescopic Coupler
Truss screw
M6×15L
Ditch guide
Reducer
Smaller duct
Baseplate
③Place duct cover and fix RR outer
cover.
Truss screw
M6×20L
Resin washer
Connection with AC Outdoor Units
Outer cover
Ditch guide
Smaller duct
15
SLIMDUCT RD Design & Installation Manual
Caution
Specifications
REDUCER RR : RR-300H-150, RR-450H-300, RR-600H-300
Installation Step / Duct
①Install bracket to secure with a
corresponding φ12 hole on end of
RD bigger duct. Attach RR base to
duct base as shown in the right.
Bigger duct
3
W 8 bolt ×25L
REDUCER
Base（left）
Bush
Wall Penetration Construction
Truss screw
M6×15L
REDUCER Base（right）
Bracket
②Insert smaller duct into RR base.
After lineset installation, place
smaller duct cover first.
Ell
Smaller duct cover
Coupler
REDUCER Base
Telescopic Coupler
Smaller duct
Reducer
③Attach RR cover to bigger duct and
lock them in place with duct cover
to complete the installation.
Bigger duct cover
Baseplate
REDUCER cover
Resin washer
M6×15L
Bush
Connection with AC Outdoor Units
Truss screw
Truss screw
M6×15L
16
Specifications
Caution
SLIMDUCT RD Design & Installation Manual
CROSS Size 900 : RX
（W）
-900
（H）
, RCI-900
（H）
, RCO-900
（H）
Wall Penetration Construction
Installation Step / Duct
①Place two CROSS RX
（W）side by
side.
Connection betwen cross parts
Bracket
RX-900
（H）
Coupler
Ell
10
Telescopic Coupler
②Fix RXJ between CROSS RX
（W）
.
Caution
Connection with AC Outdoor Units
Baseplate
Reducer
To waterproof, seal all top surface seams
of box-shaped cross with weatherproof
sealant or putty.
COUPLER SIZE 900 RXJ
17
SLIMDUCT RD Design & Installation Manual
Caution
Baseplate
Specifications
Installation Step
RD DUCT BASEPLATE RDB : Before lineset installation
Installation Step / Duct
1. 1m or 2m DUCT
Attach COUPLER RSJ/RFJ base at 20mm space between each duct end.
Place Baseplate A, B, and Coupler Baseplate inside the duct and fasten them in order with
included bolts as shown below.
Caution ・Baseplate B is a directional plate.
・Do not use Coupler Baseplate for
duct RD on bracket.
Baseplate
（B）
Baseplate
（A）
Wall Penetration Construction
applications to mount the end of
Coupler
Baseplate
2m Duct
M6 Hex nut
Flat washer
Bracket installation at duct end
When connecting brackets to the end of duct,
the bracket can be used as a baseplate
without Coupler Baseplate.
Coupler
Baseplate
3
W 8 bolt × 25L
Duct base
Resin washer
＊Screw bolts at 4
corners of each
BASEPLATE;
24 bolts in total.
Bracket
Stand fixed plate
Baseplate
（B）
Hex bolt M6×12L
Coupler
Baseplate
Coupler
Baseplate
（A）
M6 Hex nut
Ell
1m Duct
Flat washer
Baseplate
（B）
Baseplate
（B）
Telescopic Coupler
Coupler
Baseplate
Duct base
Hex bolt
M6×12L
＊Screw bolts at 4
corners of each
BASEPLATE;
24 bolts in total.
Reducer
Resin washer
0.5m Duct
Baseplate
M6 Hex nut
Baseplate
Flat washer
Connection with AC Outdoor Units
Coupler
Baseplate
Duct base
Resin washer
Hex bolt
M6×12L
＊Screw bolts at 4
corners of each
BASEPLATE;
24 bolts in total.
18
Specifications
Caution
SLIMDUCT RD Design & Installation Manual
2. 0.5M Duct / FLAT ELL + Bracket to cross strut
Installation Step / Duct
Attach COUPLER RSJ/RFJ base at 20mm space between each duct end.
Place Baseplate A, B, and Coupler Baseplate inside the duct and fasten them in order with
included bolts. Refer to figures on page 18.
Caution ・When connecting brackets to other than cross strut, follow the installation step on page 18.
・Baseplate B is a directional plate.
・Put Coupler Baseplate inside the duct, install splint under washer from the bottom and fasten
Wall Penetration Construction
with the bolts.
Coupler Baseplate
Coupler
Baseplate
SLIMDUCT RD/ FLAT ELL
Bracket
M6 Hex nut
Flat washer
Ell
Coupler Base
Coupler
Splint
Resin washer
Telescopic Coupler
Hex bolt M6×12L
Coupler Baseplate（Side View）
M6 Hex nut
Reducer
Flat washer
Baseplate
Coupler Baseplate
Duct base
Splint
Connection with AC Outdoor Units
Resin washer
Hex bolt M6×12L
19
SLIMDUCT RD Design & Installation Manual
Caution
Specifications
RD DUCT BASEPLATE RDB : After lineset installation
3. 1m or 2m DUCT
Installation Step / Duct
Attach COUPLER RSJ/RFJ base at 20mm space between each duct end.
Place Baseplate A, B, and Coupler Baseblate from the duct bottom and fasten them in order with
resin bush for baseplate.
Caution ・Baseplate B is a directional plate.
・When connecting brackets to the end of duct, the bracket can be used as a baseplate without
Coupler Baseplate.
・Size 900(H) cannot be attached baseplate after lineset installation.
Wall Penetration Construction
2m Duct
Duct base
Coupler Baseplate
Baseplate
（B）
Baseplate
（B）
Bracket
Baseplate
（A）
Coupler Baseplate
Duct base
Coupler
1m Duct
Ell
＊Fix resin bush in all φ10×12L holes of
each baseplate.
Resin bush
Telescopic Coupler
Coupler Baseplate
Baseplate
（B）
Baseplate
（B）
Baseplate
（A）
Coupler Baseplate
＊Fix resin bush in all φ10×12L holes of
each baseplate.
Reducer
Resin bush
Baseplate
0.5m Duct
Duct base
Connection with AC Outdoor Units
Baseplate
Coupler Baseplate
Resin bush
＊Fix resin bush in all φ10×12L holes of
each baseplate.
20
Specifications
Caution
SLIMDUCT RD Design & Installation Manual
4. 0.5M Duct / FLAT ELL + Bracket to cross strut
Installation Step / Duct
Attach COUPLER RSJ/RFJ base at 20mm space between each duct end.
Place Baseplate A, B, and Coupler Baseplate from the duct bottom and fasten them in order with
resin bush for baseplate.
Refer to figures on page 20.
Caution ・When connecting bracket to other than cross strut, follow the installation step on page 20.
・Baseplate B is a directional plate.
・COUPLER BASEPLATE for Aftermarket Add-ons RJB is an optional accessory for all sizes
Wall Penetration Construction
except 900(H).
①Attach RJB to duct base bottom as shown below.
Installation 1 COUPLER BASEPLATE for Aftermarket Add-ons RJB
Splint
Splint
（fixed side） （sliding side）
Bracket
Duct base
Coupler
Ell
COUPLER BASEPLATE
for Aftermarket Add-ons RJB
Telescopic Coupler
②Put the fixed side of duct base between RJB and splint first and push the other side in them.
Ensure the splint on the hole provided and tighten the screws.
Reducer
Installation 2 COUPLER BASEPLATE for Aftermarket Add-ons RJB
Connection with AC Outdoor Units
Baseplate
Slide
21
SLIMDUCT RD Design & Installation Manual
Caution
Specifications
90°FLAT ELL BASEPLATE REB : Before lineset installation
Caution ・Baseplate for 90°FLAT ELL cannot not be used after lineset installation.
Installation Step / Duct
5. 90°FLAT ELL
①Secure Baseplate R and L from the bottom of duct base with screws provided.
M6 Hex nut
Baseplate
（L）
Flat washer
Wall Penetration Construction
Coupler
Baseplate
Baseplate
（R）
Duct base
Bracket
Resin washer
Hex bolt M6×12L
Ell
②Place Coupler Baseplate inside the duct and tighten it with screw provided through splint.
Coupler
Coupler
Baseplate
SLIMDUCT RD / FLAT ELL
Telescopic Coupler
M6 Hex nut
Flat washer
Reducer
Splint
Resin washer
Hex bolt M6×12L
Baseplate
Coupler Baseplate（Side View）
M6 Hex nut
Flat washer
Connection with AC Outdoor Units
Coupler Baseplate
Duct base
Splint
Resin washer
Hex bolt M6×12L
22
Specifications
Caution
SLIMDUCT RD Design & Installation Manual
NET : Before lineset installation
Installation Step / Duct
Caution ・Net cannot be used with Ells, RE, RF & RT.
6. DUCT
Unroll net inside the duct and fix it with resin bush which mates up with a corresponding φ7
holes on duct base.
Wall Penetration Construction
Resin bush
Net
Bracket
φ7 Hole
Ell
Duct base
Coupler
NET : After lineset installation
Caution ・For size 900(H), net cannot be applied after lineset installation.
・Net cannot be used with Ells, RE, RF & RT.
Telescopic Coupler
7. DUCT
Reducer
After lineset installation, unroll net from the duct bottom and fix it with resin bush which mates up
with a corresponding φ7 holes on duct base. Ensure about 250mm resin bush spacing to prevent
net sagging.
φ7 Hole
Connection with AC Outdoor Units
Baseplate
Duct base
Net
Resin bush
23
Approximately 250mm
SLIMDUCT RD Design & Installation Manual
Caution
Connection with AC Outdoor Units
Specifications
SLIMDUCT UD is applied to protect the lineset between the condenser and RD ducting system.
Branching off
Installation Step / Duct
Pull out the linesets from the bottom of duct RD to branch off. Baseplate will have to be purpose
processed on site.
Installation Step
RAH PIPE HANGER SUPPORT for SLIMDUCT UD (Fixing Clamp + Bracket)
Wall Penetration Construction
①Attach duct bracket at the branching
point.
Duct RD
Hex screw
Bracket
Bracket (RAH)
Ell
②Install SLIMDUCT UD to protect linesets and secure it with RAH adjusting the height.
Coupler
Caution ・Do not install RAH upside down.
Do not install RAH upside down.
175
Telescopic Coupler
Top
63
H
（mm）
C
H
RAH-90
69
46
RAH-120
84.7
62
Bottom
Resin washer
SLIMDUCT UD
Reducer
C
Item No.
Flat washer
Hex bolt
Baseplate
③Use END FITTING UDCN to cover the end of linesets.
Connection with AC Outdoor Units
SLIMDUCT UD
END FITTING UDCN
24