Halton SLN – Linear slot diffuser

Overview

• Horizontal or vertical plane jet air supply
• Special profile diffuser blade creates a Coanda effect which enables wide range or air flow rates
• Supply in one or two directions
• Ceiling or wall installation, suitable also for continuous “wall to wall” installations
• Adjustable throw pattern, flexibility of orientation with different configurations
• Detachable diffuser allows cleaning of the terminal unit and ductwork

Accessories

• Plenum with a circular duct connection(s) D160…250mm with rubber gasket
• Plenum options with measurement and adjustment functions
• Attenuation insulation for plenum

Dimensions

Halton SLN

‘

Halton SLN + PLD

Standard dimensions of the Halton SLN + PLD unit with standard end caps are presented in the table below.

Needed hole in the ceiling: F x (L1+10)

Material

Accessories

Special end caps are available for modular ceilings.

Function

Supply air is supplied through the linear slots of the diffuser, either horizontally along the ceiling surface or vertically into the occupied zone.
For wall installation, the plane jet air is supplied horizontally or directed to the ceiling surface, which increases the throw length.

Installation

Code description:

1. Mounting bracket
2. Transversal bar
3. Screw

The Halton SLN linear slot diffuser is connected directly to the Halton PLL or PLD plenum.
The plenum is installed into the suspended ceiling with M8 drop rods (not included in the delivery) and connected to the ductwork.

Remove the T-profiles of the Halton SLN by pulling them gently, in order to access the transversal bars located behind the profiles.
Fit the installation brackets into the grooves of the plenum and secure with the screws supplied with the unit.
Put screws into the holes of the transversal bars. Screw on until the diffuser is flush to the ceiling.
Replace the T-profiles.

The unit can be installed without plenum using the staff brackets. Those pieces are available as accessory (2 by slad or by linear meter).

String course mounting

The maximum length is 2000mm. So when length is superior to 2000mm, it is necessary to place side by side several pieces. Some alignement guides are given in order to make the the mounting easier.

Adjustment

The air pattern can be changed through 180° by manually adjusting the flow deflection vanes.
Each deflection vane section can be individually adjusted without removing the T-profiles, to provide flexibility in supply air pattern orientation.

To aid in adjusting and measuring the airflow rate, it is recommended that the diffuser is connected to a plenum equipped with a MSM.
The supply airflow is determined by measuring the pressure difference with a measurement module.
Measure the differential pressure with a manometer. The airflow rate is calculated according to the following formula:

where:

∆P_m    Measured pressure (Pa)
k         Factor given as a function of mounting and diameter
Q_v       Airflow rate (l/s)

The k factor for installations with different safety distances
(distance of other items from the MSM):

Adjust the airflow rate by rotating the control spindle until the desired setting is achieved.
Lock the damper in position with a screw.
Replace the tubes and spindle in the plenum, and return the linear diffuser to its position.

Servicing

Remove the T-profiles.
Remove the linear diffuser by unscrewing the screws of the transversal bars.
Clean the parts by wiping with a damp cloth.
Push the linear diffuser back into place by screwing the transversal bars to the installation brackets.

Option: with balancing plenum Halton PLD + MSM (or PLL + MSM)

Remove the measurement and adjustment module by gently pulling the shaft (not the control spindle or measurement tubes!).
Wipe the parts with a damp cloth, instead of immersing in water.
Reassemble the measurement and adjustment module by pushing the shaft into place until the module meets the stopper.
Push the linear diffuser back into place by screwing the transversal bars to the installation brackets.

Specification

Halton-brand ceiling diffuser, type Halton SLN, with two to four slots, suitable for variable airflow.

Excellent coanda effect provided with a wide range of airflow rates.
The supply air pattern shall be directable by adjusting the flow deflection vanes without any change in the appearance of the diffuser.

The linear slot diffuser shall have an extruded aluminium outer frame, flow deflection vanes and T- profiles, and polyester-painted to white (RAL 9003) colour.

The diffuser shall be connected to the ductwork using a plenum with mineral wool as sound attenuation material.
The removable linear slot diffuser shall be mounted into the plenum with invisible screws.

The plenum shall comprise an airflow measurement and adjustment module.
The linear diffuser shall be removable in order to provide access to the measurement and adjustment module in the plenum.

Flow deflection vanes and T-profiles shall be easily removable for access to the plenum.

Order code

SLN/N-L; FP-SE-ST-FI-CO-ID-ZT

N = Number of slots
2, 3, 4

L = Active length (mm)
400, +1, .., 50000

Other options and accessories

FP=Front plate option (available from Crépy factory)
N         No
TC       TC Ceiling
FC       Fineline Ceiling

SE = End caps
Y         Yes
N         No

ST = Type of end caps
NA      Not assigned
N1      Standard 23 mm
E1       Type E1

FI   = Finishing
PN      Painted

CO = Colour
SW     Signal white (RAL 9003)
X         Special colour (RAL xxxx)

ID = Diffuser assembled with plenum (available from Crépy factory)
N         No
Y         Yes

ZT = Tailored product
N         No
Y         Yes (ETO)

Sub products

PLD      Plenum

Code example

SLN-2-400, SE=Y, ST=N1, FI=PN, CO=SW, ZT=N