Quick to install due to the individually pre-calibrated airflow values. This airflow damper is maintenance free because the dust doesn´t effect the measurement sensors.
Halton Max Ultra Circular has wide measurement range.
Circular airflow management damper using the ultrasound technique for airflow measurement.
Fig.1. Halton Max Ultra Circular has two ultrasound sensors for airflow measurement.
The damper can function either as a supply or an exhaust unit. It maintains the required airflow through ultrasound measurement, regardless of airflow and pressure variations in the ductwork.
The damper has an airflow controller, two ultrasound sensors for airflow measurement, airflow temperature sensor and an actuator for controlling the damper blade. The airflow controller has a control panel for displaying the measurement values and setting the operation parameters.
The airflow controller can receive the airflow control signal via
All three control modes are synchronized between each other. The airflow measurement includes temperature and duct type compensations, providing accurate and reliable airflow measurements even at short distances from airflow disturbances in the ductwork.
Description |
Value |
Duct connection sizes | ø100-400 |
Material | Galvanised steel or stainless steel (EN 14404 / AISI 316L) |
Air velocity range | 0.5 – 10 m/s |
Operating range (ambient temperature) | 0-50℃ |
Ambient relative humidity (non-condensing) |
< 95% |
Communication interface | Modbus RTU, analogue |
Accessories |
|
Standards and certifications |
|
Maintenance | Maintenance-free |
The operable airflow range for Halton Max Ultra Circular corresponds to duct air velocities 0.5 – 15 m/s.
The below example shows the airflow ranges and noise levels with air velocity 1-10 m/s.
Fig.2. Quick selection for Halton Max Ultra Circular within air velocity range 0.5-10 m/s
NS |
qv min-max (l/s) |
qv min-max (m3/h) |
100 | 4 – 79 | 14 – 283 |
125 | 6 – 123 | 22 – 442 |
160 | 10 – 201 | 36 – 724 |
200 | 16 -315 | 55 – 1131 |
250 | 15 – 491 | 88 – 1767 |
315 | 39 – 779 | 140 – 2806 |
400 | 63 – 1257 | 226 – 4524 |
Halton Workplace WRA is part of the Halton Workplace solution offering.
Fig.3. Halton Jaz JDA static diffuser and Halton Max Ultra Circular VAV damper combined with a Halton Workplace room automation controller.
Halton Workplace WRA is a controller especially designed for controlling the automation system of office spaces and meeting rooms. It is used for controlling the ventilation airflow, room temperature, and indoor air quality.
The Halton Workplace WRA room automation package consists of a controller unit and optional components depending on customer needs: a wall panel and sensors for temperature, CO2, occupancy, pressure, and condensation.
There are options available for the controller unit and wall panel, depending on the number of controls and sensors required. The Halton Workplace WRA room automation controller is always combined with other Halton products for adaptable and high-level indoor climate.
The Halton Workplace WRA room automation controller operates with Variable Air Volume (VAV) dampers and active chilled beams of the Halton Workplace system. These are used for adjusting the ventilation airflow, room temperature, and indoor air quality in office spaces.
Each room unit in an office space can have its own dedicated Halton Workplace WRA room automation controller, or a single controller can control multiple room units. The Halton Workplace WRA room automation controller can automatically adjust the system according to the indoor environment level preferred by users. Each room unit having its own dedicated controller brings maximum flexibility.
Fig.4. Halton Jaz JDA diffuser and Halton Max Ultra Circular VAV damper, controlled with Halton Workplace WRA room automation controller in a single office room
In this configuration, the Halton Workplace WRA room automation controller (type DXR2.E12P-102A) controls a Halton Jaz JDA diffuser that is combined with a Halton Max Ultra Circular VAV damper. External CO2 and occupancy sensors are installed in the room. The temperature sensor is integrated into the wall panel (type QMX3.P34). The system also includes an exhaust VAV damper and radiator heating water valve control. One Halton Workplace WRA room automation controller can individually control up to four terminal units, and there can be several Halton Workplace WRA room automation controllers in the room.
Fig.5. Schematic drawing: Halton Jaz JDA diffuser and Halton Max Ultra Circular VAV damper, controlled with Halton Workplace WRA room automation controller
Code | Equipment |
RC | Controller unit |
FG | Airflow damper actuator |
FC | Airflow measurement |
H | Water valve actuator |
OS | Occupancy sensor |
CO2 | CO2 sensor |
WP | Wall panel |
TE | Temperature sensor |
TI | Temperature display |
For the wiring diagram of similar configuration, see the product pages of the Halton Workplace WRA room automation controller.
Note: For more information, see the product pages of the Halton Workplace WRA room automation controller.
No. | Part | Material |
1 | Casing | Galvanised steel or stainless steel (EN 14404/AISI316L) |
2 | Duct seal gasket | Rubber |
3 | Shaft | Galvanised steel or stainless steel (EN 14404/AISI316L) |
4 | Blade | Galvanised steel or stainless steel (EN 14404/AISI316L) |
5 | Blade gasket | EPDM rubber |
6 | Actuator | Plastic, steel, PVC cable |
7 | Cable | LSZH |
8 | Ultrasound sensor and temperature sensor | Plastic ABS |
9 | Airflow controller | Plastic ABS |
The Halton Max Ultra Circular airflow controller LAC-1.UO1-controls the airflow using ultrasound technology. It provides accurate airflow measurements with two ultrasound sensors.
Technical data
Feature |
Description |
---|---|
Control concept |
|
Power supply |
|
Cables |
|
Dimensions |
|
Protection class |
|
Code |
Notes |
Torque |
Damper size |
Communication interface |
Order code |
G2 |
Siemens actuator |
5 |
100-315 |
Siemens GDB 161.1E 0..10V/2..10V |
G2=GDB 161.1E |
G3 |
Siemens actuator |
10 |
400 |
Siemens GLB 161.1E |
G3=GLB 161.1E |
G4 |
Belimo actuator |
5 |
100-315 |
Belimo LM24A-SR 0..10V/2..10V |
G4=LM24A-SR |
G5 |
Belimo actuator |
10 |
400 |
Belimo NM24A-SR |
G5=NM24A-SR |
Fig.6. Halton Max Ultra Circular, D=100 – 315
Fig.7. Halton Max Ultra Circular, D=400
NS |
ØD |
L |
L1 |
L2 |
H |
H1 | Weight (kg) |
100 | 99 | 427 | 355 | – | 127 | 153 | 1.9 |
125 | 124 | 474 | 402 | – | 153 | 178 | 2.2 |
160 | 159 | 540 | 468 | – | 187 | 213 | 2.7 |
200 | 199 | 612 | 540 | 15 | 227 | 253 | 3.3 |
250 | 249 | 705 | 633 | 38 | 277 | 303 | 4.3 |
315 | 314 | 825 | 753 | 70 | 342 | 368 | 5.8 |
400 | 398 | 1054 | 982 | 65 | 424 | 447 | 9.6 |
Pressure-independent variable airflow control damper for supply and exhaust installations.
There are three possibilities to position the damper. Sensors can be directed outwards, side or inwards.
Disturbances in the ductwork such as duct bends, T-branches and sound attenuators cause turbulence and an uneven airflow. This can lead to fluctuation and inaccuracy in measurement values.
Note: The recommended safety distance is longer or equal to three duct diameters’ distance, to ensure optimal accuracy.
Halton Max Ultra Circular technical performance:
Note: The measurement uncertainty is defined in laboratory conditions and may be greater in practical installations, where non-optimal installation situations or multiple consequent disturbances may exist.
The wiring must be carried out by professional technicians following local regulations. For the power supply, a safety-isolating transformer must be used.
Controller connections
Terminal | Name | Description |
1 | GND | Ground |
2 | 24 V DC/AC | Power supply input |
3 | GND | Ground |
4 | Standard RS-485 B | Data receive/send line B |
5 | Standard RS-485 A | Data receive/send line A |
6 | GND | Ground |
7** | AI3 | Input for NTC 10k temperature sensor |
8 | GND | Ground |
9 | AI1 | Input for airflow or damper reference signal |
10 | GND | Ground |
11 | AO1 | Output for airflow or damper feedback signal |
12* | AI2 | Analogue actuator feedback signal |
13* | AO2 | Analogue actuator reference signal |
14* | GND | Ground |
15* | 24 V DC/AC | Power supply output for the analogue actuator |
* Connected to Siemens GDB 161.1E or Belimo LM24A-SR actuator
** Not included in delivery
Controller settings
Wiring diagram for master-slave configuration
Wiring diagram for parallel configuration
Control scheme for Halton Max Ultra Circular with a master-slave configuration
In the following example, the supply unit is controlling the exhaust unit.
Control scheme for Halton Max Ultra Circular with a parallel configuration
Before the system start-up, the controller settings (including the correct installation case) and optionally the Modbus communication parameters have to be set.
Factory settings
The airflow range for Halton Max Ultra Circular (MUC) is preset at the factory. The factory settings for the controlsignal and feedback signal are the same, but they can be configured individually. If the airflow range is notspecified by the customer, the default factory settings are the following:The airflow rates for Halton Max Ultra Circular are preset at the factory. If the airflow rates are not specified by the customer, the default factory settings are:
The maximum airflow (Vnom) rates in the following table are given with an airflow velocity of 10 m/s.
NS | Maximum airflow (l/s) @ 10 m/s | Maximum airflow (m3/h) @ 10 m/s |
100 | 79 | 283 |
125 | 123 | 441 |
160 | 201 | 723 |
200 | 314 | 1130 |
250 | 491 | 1767 |
315 | 779 | 2805 |
400 | 1257 | 45224 |
Table 1. Halton Max Ultra Circular factory settings
Note: Step-by-step instructions on how to perform the commissioning can be found in the Halton Max Ultra Circular Installation, commissioning and maintenance guide (see section Downloads).
Halton offers high-quality rectangular sound attenuators with round duct connection for reducing noise levels in the duct. Sound attenuators are available as accessory and the following options are available:
D1 is connected directly to the damper with female-type connection. D2 is attached to the duct with male-type connection. The above picture depicts supply air installations. In exhaust installations, the airflow direction is from D2 to D1. The damper is always connected to D1.
Dimensions (mm) and weights
Fig.8. Sound attenuators dimensions and weight
Note: Sizes 500 is not available for Halton Max Ultra Circular (MUC).
Examples of attenuation data:
Attenuation data, L = 600 mm, material = PEF
Attenuation data, L = 1000 mm, material = PEF
Note: For further information, contact Halton Sales.
Reheat coils are available as accessory. Main features:
Reheat coil dimensions
The heater can be installed in vertical or horizontal ducts. The safety distance is 2xD.
The heater must always be interlocked towards the fan or towards the airflow going through the heater. The interlocking function is connected to the duct heater power supply or, if the heater has an internal heating controller (model RC), it can also be connected directly to the controller.
The power supply to the duct heater must be switched off when the fan is switched off or when the airflow rate is too low.
When selecting the airflow control damper and reheat coil, ensure that the airflow velocity is above 2 m/s in order to guarantee a proper control function.
Heating capacity with low air velocity of 2 m/s
NS |
Power (W) |
qv l/s |
qv m3/h |
dT(max) K |
100 |
600 |
16 |
57 |
32 |
125 |
900 |
25 |
88 |
31 |
160 |
1500 |
40 |
145 |
31 |
200 |
2100 |
63 |
226 |
28 |
250 |
3000 |
98 |
353 |
25 |
315 |
3000 |
156 |
561 |
16 |
400 |
3000 |
251 |
905 |
10 |
Heating capacity with an air velocity of 6 m/s
NS |
Power (W) |
qv l/s |
m3/h |
dT(max) K |
100 |
600 |
47 |
170 |
11 |
125 |
900 |
74 |
265 |
10 |
160 |
1500 |
121 |
434 |
10 |
200 |
2100 |
188 |
679 |
9 |
250 |
3000 |
295 |
1060 |
8 |
315 |
3000 |
468 |
1683 |
5 |
400 |
3000 |
754 |
2714 |
3 |
Note: For further information, contact Halton Sales.
S = Model
G With blade gasket
D = Size of duct connection (mm)
100, 125, 160, 200, 250, 315, 400
MA = Material
GS Galvanised steel
AS Stainless steel (EN 14404/AISI 316L)
CU = Control unit
G2 GDB 161.1E, 5 Nm
G3 GLB 161.1E, 10 Nm
G4 LM24A-SR, 5 Nm
G5 NM24A-SR, 10 Nm
FS = Factory-set airflow limits
DS Default factory settings (Vnom)
DC Customer specified settings
SA = Sound attenuator
-> only available from Kausala, Finland
NA Not assigned
H1 L = 600 mm; Outlet = Inlet; Mineral wool
H2 L = 1000/1250 mm; Outlet = Inlet; Mineral wool
H3 L = 600 mm; Outlet = Inlet; Polyester fibre
H4 L = 1000/1250 mm; Outlet = Inlet; Polyester fibre
H5 L = 600 mm; Outlet > Inlet; Mineral wool
H6 L = 1000/1250 mm; Outlet > Inlet; Mineral wool
H7 L = 600 mm; Outlet > Inlet; Polyester fibre
H8 L = 1000/1250 mm; Outlet > Inlet; Polyester fibre
H11 L = 600 mm; Outlet = Inlet; Mineral wool; Access panel
H12 L = 1000/1250 mm; Outlet = Inlet; Mineral wool; Access panel
H13 L = 600 mm; Outlet = Inlet; Polyester fibre; Access panel
H14 L = 1000/1250 mm; Outlet = Inlet; Polyester fibre; Access panel
H15 L = 600 mm; Outlet > Inlet; Mineral wool; Access panel
H16 L = 1000/1250 mm; Outlet > Inlet; Mineral wool; Access panel
H17 L = 600 mm; Outlet > Inlet; Polyester fibre; Access panel
H18 L = 1000/1250 mm; Outlet > Inlet; Polyester fibre; Access panel
RH = Electric reheat coil
-> only available from Kausala, Finland
NA Not assigned
RM No internal heating controller, PWM control signal input (230 VAC, pulse width modulation)
RC With internal heating controller (0…10-VAC control signal input)
ZT = Tailored product
N No
Y Yes (ETO)
MUC/G-100, MA=GS, CU=G2, FS=DC, SA=NA, RH=NA, ZT=N