NADklima SRA User manual

KEEP THIS GUIDE
Maintenance and installation guide
Duct diuser
SRA
nadklima.com
Québec
NAD Klima (head oce)
144 rue Léger, Sherbrooke (Qué) J1L 1L9
[phone]
1 866 531-1739
[e-mail]
Ontario
NAD Klima Ontario
2840 Argentia Road, Unit 6
Mississauga (Ontario) L5N 8G4
416 860-1067
[e-mail]
CANADA
M
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Conguration
The SRA diuser is a smooth diuser with rectangular sections on which slots are mounted
length. The number of slots is determined by air ow quantity and duct dimensions. The
slots contain 100 mm long ABS eccentric rollers or ABS nozzle rollers (black, or white). The
eccentric rollers are provided with alphanumeric guides which allow airow pattern
adjustment across a 180°range (see page 9).
Passive ducts without slots are available in the same dimensions as the active SRAs in order
to ensure duct network uniformity.
The SRA diuser is available in many dimensions (see our catalogue, page 12).
Height
Width
Height
Distance C/C (suspension)
Distance between
suspension holes
(Width of the SRA minus 100 mm (4”))
50 mm
(2”)
50 mm
(2”)
Length
Width
Identication tag inside the duct
Piece No :
TAG
AIR DIRECTION
N14-XXX
SRA-1450-1300-203 X 254-03-006-DFS-W-9003-X-X
Adjustment : DFS
Color : RAL 9003
Balancing damper
Description of the identication tag
Piece number (ref. NAD’s submittal)
Duct’s TAG (ref : engineer’s drawing)
NAD’s project number
Product’s code
Roller’s adjustment
Piece’s color
Special notes
Indication of air direction
air direction

Suspension
The suspension of the SRA diuser is
assured by threaded rods provided by the
installer. (Standard suspension) (see page 4)
Upon request, colored rod covers are
supplied to cover the threaded rods.
It should be noted, however, that the SRA
diusers can be attached directly to the
ceiling (see page 6).
Other methods of suspension are
available; the steel suspension rail*,
which greatly improves installation, or
suspension with a high tension metallic
cable*.
*These alternative suspension modes can be
provided by NAD Klima.
Installation to the ceiling - page 6
Installation with threaded rods - page 4
Optional rod cover
Installation with cables - page 7
Installation with rail - page 5
Ø 13 mm
3

Installation with threaded rods
Rod cover
Threaded rods 10 mm (3/8”)
supplied by installer
4
(Optional)
X
50 mm
(2”)
50 mm
(2”)
Suspension holes
Illustration B.
Illustration A.
Illustration C
Illustration D
X
Y - 50 mm (2’’)
Y
Rod cover
Nut
Washer
Washer
Lock washer
Nut
Threaded rod 10 mm (3/8”)
air direction
A) Take the distance X between the
suspension holes located on the diuser’s top.
Take the diuser’s width minus 100 mm (4”)
(See illustration A).
B) Determine the length (Y)
- To determine the length of the rst duct,
subtract 2” from its length
- For the remaining ducts use the exact
length of the duct. (See Illustration B)
C) Secure the threaded rods to the
ceiling. Make sure to respect the
width between rods (X) and the length
between rods (Y).
The threaded rods must be cut to
the desired lengths prior to installation.
D) Install the rod covers before the diuser.
Install the diuser aligning the rod to the
suspension holes. (See illustrations C and D)
For installation of next diusers,
see page 8.
Note: The threaded rods are supplied by
the installer.

Suspension with rails
A) Rails installation
Take the distance X between the
suspension holes located on the diuser’s top.
Take the diuser’s width minus 100 mm (4”)
(See illustration A) .
Secure the rail to the ceiling making sure to
respect the width between rails (X).
In case of a rail suspension installation
(illustration B) , a 9.5 mm rod threaded rod
(3/8” )(not supplied) will be used.
A rod cover can be used.
In the case of an installation directly to the
ceiling,
(illustration C) , make sure the rails are
securely anchored using screws (not
supplied) every 405 mm (16”).
B) Install the achor bolt
From the inside, screw the bolt, then insert the
at washer before inserting the bolt into the
nut anchoring
(illustration C-1) .
DO NOT THIGHTEN THE BOLT IMMEDIATLY.
C)
Hanging the diuser
When the anchor nuts are installed, turn
the nut so that its length is parallel to the
side of the diuser.
Thus, it may enter the track with ease.
(illustration C-2 )
Once in the rail, make a clockwise quarter turn
to the nut with a screwdriver
(illustration C-3 ).
The diuser will be supported while you
tighten the bolts.
For the installation of next diusers, see
page 8.
Illustration B
Diuser
Illustration C
5
X
50 mm
(2”)
50 mm
(2”)
Suspension holes
Illustration A.
Channel nut
bolt
Washer
Lock washer
1
2
3

Illustration C.
Illustration C.
Illustration B.
X
Y - 50 mm (2’’)
Y
Installation directly to the ceiling
Determinates the distance of suspension
holes, ”X”for the width and ”Y” for the lenght.
A)
For the width ”X”
Take the distance between the
(see illustration A) .
B) Determine the length (Y)
subtract 2” from its length
- For the remaining ducts use the exact
length of the duct
(see illustration B) .
Make sure the ceiling is strong enough to
consult our SRA catalog on page 12.
C)
screws and washers adapted to the type of
ceiling
(voir dessin C) .
(Screws and washers are not supplied.)
see on page 8.
X
50 mm
(2”)
50 mm
(2”)
Suspension holes
Illustration A.
Suspension holes
air direction
Air direction
Air supply
FIRST SRA
6

X
50 mm
(2”)
50 mm
(2”)
Suspension holes
illustration A.
Suspension with steel cables
Illustration B.
X
Y - 50 mm (2”)
Y
illustration C.
Determinates the distance of suspension
holes, ”X”for the width and ”Y” for the lenght.
A)
For the width ”X”
Take the distance between the
suspension holes located on the diuser’s top.
Take the diuser’s width minus 100 mm (4”)
(see illustration A) .
B) Determine the length (Y)
To determine the length of the rst duct,
subtract 2” from its length
For the remaining ducts use the exact
length of the duct
(see illustration B) .
C) Installation of suspension cables
Calculate the desired length and
add 1 inch (25 mm).
D) Diuser installation
Insert the anchor bold (supplied) through
the suspension hole located on the top of
the diuser.
(illustration C)
E)
Adjust diuser height
Insert the cable in the throttle adjustment
and adjust the height.
Cut excess cable.
For installation of next diusers,
see on page 8.
throttle adjustment
Suspension bolt
Steel cable (Ø 2.5 mm - 3/32”)
Anchor CCA for duct
7
Available ceiling anchors
CPA
Ø 13 x 70 x 14.3 mm
(Ø 1/2" x 2 3/4" x 9/16")
Ø19 x 50 mm (Ø 3/4" x 2")
CCP
Ø 25 x 28.5 mm
(Ø 1" x 1 1/8")
Ø 13 mm (Ø1/2”)
Washer
Lock washer
(screw not
supplied)
•

Installation of next diusers
exterior fold
Air direction
Interior fold
Assembly
The SRA diuser sections are assembled
directly one behind the other, without sleeves.
An identication tag will indicate the
direction ducts must be installed.
.
Installation
Add a thread of sealer at the junction of two
diusers
(see the shaded area on illustrations A and B).
Insert the new section interior fold on the
decline outside the previous section
(see illustration A) .
The new section will be supported by the
exterior fold of iprevious section.
At the other end, install the choosen
suspension (threaded rods, rail or steel
cables).
When in position, securely tighten the two
bolts.
Fixing screw
Fixing screws
Fixing screw
Pre-drilled holes (2)
AIR
AIR
Add a thread
of sealer
Repeat many times as there are sections.
Locates on each side of the duct, two pre-drilled
holes help to secur thighten the SRA with the
screws provided for this purpose.
8
illustration B.
Add sealer
bolt
exterior fold
interior fold
Ceiling
Rail
Duct
illustration A.
cdiuser’s side
pre-drilled holes
(2 holes on each sides)
(2 screws on
each side)

Adjustment
code
Air ow
min. max.
Coding faces the air jet
illustration A.
Eccentric roller
180˚ (12 h)
-90˚(9 h)
+90˚ (3 h)
0˚ (6 h)
9
Air
direction
Examples
Slots at 0˚
CONTROLLING SRA AIR FLOW DIRECTION
Setting of the air jet direction
Due to the shape of the eccentric rollers and
adjustment dial with alphanumeric characters,
the air jet direction at the diuser’s outlet can vary
up to 180°. For each direction, there are two (2)
roller positions (“reduced” or “not reduced”), as
illustrated in gure E.
The length of each roller is 100 mm and they are
individually adjustable. As a result, airow
combinations are almost innite. In manufactur-
ing, the ducts are individually adjusted for each
project. The standard setting for the rollers is set
to diusion mode in the positions “21”and “65”
alternately. This setting produces strong
induction, which can be used to meet heating
and cooling needs, thereby creating high mixing
levels.
As a result, the divergent mode allows air jets to
blow in more accurate directions. This mode
also allows a longer projection of the airow. In
specic zones, which are habitually dicult to
cover, a specialized setting can be created.
Figures C and D, show the relationship between
eccentric roller position and the exiting airow
direction. Note that to maximize air projection,
multiple jets can be orientated in the same
direction optimizing the zone coverage even
when heating.
1.8 m
(6 ft)
DRB
(With
Nozzle rollers)
DRB
((with nozzle
roller)
BC / DE
Diuse
DFH
1.8 m
(6 ft)
max. 3 m (10 ft)
65 / BC
Diuse
DFL
21 / DE
Diuse
DFR
21 / 65
Diuse
DFS
BC / EF
Diuse
DFE
AB / DE
Diuse
DFA
AB / EF
Diuse
DFF
max. 5.4 m (18 ft)
1.8 m
(6 ft)
21 - 65
Divergent
DVS
CD / EF
Diuse
DFT AB / CD
Diuse
DFN
Slots at + 90˚
Figure D
1.8 m
(6 ft)
1.8 m
(6 ft)
All height
SRA with eccentric rollers
SRA with eccentric rollers
SRA with nozzle rollers
SRA diuser with eccentric rollers and/or nozzles
4.5 m - 9 m (15-30 ft) 3 m - 4.5 m (10-15 ft)
Figure C
Air direction
Figure A
Figure B

Maintenance
The NAD Klima SRA diuser requires no special maintenance other than periodic cleaning.
We recommend cleaning the diuser with a multi-lament brush or microber duster that
you will pass softly on the diuser. The thermo-lacquered nish allows for an easy cleaning
of the diuser, as dust does not stick to it.
When cleaning, gently move the brush or duster in the same direction as the rollers, so as
not to change their adjustment*.
12
*
RE-ADJUSTMENT OF SRA ECCENTRIC ROLLERS
If, during the cleaning of the RRA diuser, a airow disalignment occurs,
it is important to realign rollers in their original position, to maintain
full eectiveness of your diuser.
Only a technician specializing in air balancing is qualied to restore roller adjustment
to its initial position.
To do this, he must have access to the initial data and engineering requirements,
then follow the instructions provided in this manual on page 9
.
IMPORTANT
NAD Klima ®
Quality
®
Manufactured in Sherbrooke, Quebec, (Canada)
and distributed all across North America, our products raise the bar in terms of
standards of quality, eciency and energy savings.
All NAD Klima products are the pride of an inventive, innovative
and devoted team. Our goal is not only to supply diusers,
but to create outstanding results.
We are NAD Klima.