Halton TSA – Swirl diffuser

Overview

• Horisontal radial or vertical compact swirl jet air supply
• Suitable for heating and cooling applications
• Specially designed for large and high spaces
• Supply air pattern can be adjusted either manually or controlled by actuator
• High induction swirl jet ensures efficient mixing and fast reduction of air velocity
• Installation using plenum or directly to ductwork

Accessories

• Plenum options with measurement and adjustment functions
• Actuator (with 24 VAC power supply and proportional 0…10 VDC control signal or alternatively self-actuating wax-bulb) for the direction of airflow pattern

Quick selection

Values with adjustment module (MSM) fully open.

Fig. 1. Quick selection for diffuser with radial jet, unit l/s

Fig. 2. Quick selection for diffuser with radial jet, unit m³/h

Fig. 3. Quick selection for diffuser and plenum with radial jet, unit l/s

Fig. 4. Quick selection for diffuser and plenum with radial jet, unit m³/h

Dimensions and weight

Halton TSA, manually operated (MO=NA)

* Manually operated (MO = NA), Electrical actuator (MO=M2), Wax-bulb actuator (MO=M3)

Halton TSA with Halton Pop PDI plenum

Fig. 5. Halton TSA with Halton Pop PDI plenum, externally positioned connection spigot

Fig. 6. Halton TSA with Halton Pop PDI plenum, internally positioned connection spigot

Material

Product models

Halton TSA with electric actuator (MO=M2)

Fig.7. Halton TSA with Siemens GDB161.2E/HA actuator with 24 VAC power supply and proportional 0…10 VDC control signal

Halton TSA with wax-bulb actuator (MO=M3)

Fig.8.  Halton TSA equipped with a wax-bulb actuator

• Work without any power supply.
• The cylinder position changes according to the temperature of supply air.
• The temperature range of the wax-bulb actuator is about 20 °C to 27 °C.
• The time taken to change from radial to compact jet (or the other way around) is 10 – 20 minutes.
• When warm air is supplied the piston of the wax bulb actuator keeps moving until the TSA supply air pattern is vertical. When cold air is supplied, the Halton TSA supply air pattern is changed back to horizontal by means of a spring.

Operating principle

                     Compact jet                                       Radial Jet

The Halton TSA is a high induction swirl diffuser with an adjustable flow pattern. The horizontal radial swirl jet is used mainly in cooling applications that use cool supply air or for ventilation with isothermal supply air.

The vertical compact swirl jet with warm supply air is used in heating applications.

Adjustment of the supply air pattern is effected by moving the internal adjustment element (cylinder).

It is also possible to change from cooling mode to heating mode by adjusting the flow pattern using an electric or wax bulb actuator.

The recommended maximum temperature differences between room and supply air temperatures are +15 °C for heating and -15 °C for cooling applications.

Installation

Fig. 9. Halton TSA diffuser connected to a Halton Pop PDI plenum

The diffuser is connected usually to balancing plenum Halton Pop PDI. Alternatively, it can be connected direct to the duct by riveting or screwing. In that case, minimum safety distance to the next T-branch or curve is three times the duct diameter (3xD).

The front vane panel can be reattached

• Remove the screws through the front vane panel (sizes 250 and 315) or between the cylinder and casing (sizes 400, 500 and 630), turn and hold the front vane panel to remove.

Take care during installation to ensure that the cylinder can move freely and that the actuator has adequate installation space. There should be at least 50 mm clearance space above the top of the device when the cylinder is in the lowest position. The connection and fixing rivets or screws may not be located more than 50 mm below the upper edge of the diffuser.

Wiring and DIL switches (MO=M2)

DIL switches:
1.  Automatic adaptation of limited movement length to 0-10 VDC control signal
2.  Direction of shaft movement based on 0-10 VDC control signal
3.  Feedback signal

Commissioning

Fig. 8. Adjustment of airflow of diffuser and plenum combination

Airflow control

The diffuser itself has no airflow adjustment. To adjust and measure the supply airflow rate, the diffuser shall be combined with Halton Pop PDI balancing plenum with measurement and adjustment module MSM. In case of exhaust air, use of adjustment module MEM is recommended. It is not possible to measure exhaust airflow rate with adjustment module MEM.

Open the front plate and pass the tubes and control spindle through the front panel (Fig. 8.). Replace the front panel. Measure the differential pressure with a manometer. The flow rate is calculated using the formula below:

where

• q_v           Airflow rate [l/s] or [m³/h]
• ∆p_m      Measured pressure [Pa]
• k            The k factor (see the table below)

Adjust the airflow rate by rotating the control spindle until the desired airflow rate (pressure difference) is achieved.

Set the tubes and spindle back into the plenum. Damper position can be locked with a knurled head screw of the adjuster.

Throw pattern adjustment

Key
1.    Control knob
2.    Casing
3.    Front vane panel
4.    Cylinder

The supply air jet is adjusted by changing the position of the cylinder. When you turn the control knob clockwise the throw pattern is changes from radial to compact.

Maintenance

Remove the front vane panel and clean the diffuser by wiping it with a damp cloth, instead of immersing it in water.

Option with balancing plenum

Remove the measurement and adjustment module by pulling gently the shaft; (not the control spindle or measurement tubes!).
Wipe the parts with a damp cloth, instead of immersing them in water.

Remount the measurement and adjustment module by pushing the shaft until the module meets the stopper.

Specification

The diffuser consists of a frame with fixed internal profiled vane rings and a movable cylinder for throw pattern selection.

The front vane panel, the movable cylinder and the frame are made of powder painted steel, with a white (RAL 9003/30%) as standard colour.

The airflow pattern is adjustable automatically using an electrical or wax-bulb actuator, (in applications where both heating and cooling are required.)

Order code

TSA-D; CO-MO-ZT

Order code example

TSA-250; CO=SW, MO=NA, ZT=N