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Ultrasound airflow damper
Ultrasound airflow damper

Halton Max Ultra Circular (MUC) – Airflow management damper

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 (MUC) has wide measurement range.

  • Variable (VAV) and constant (CAV) airflow control applications
  • Supply and exhaust installations
  • Enables flexibility in terms of space layout design

Overview

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 (MUC) has wide measurement range.

Application areas

  • Variable (VAV) and constant (CAV) airflow control applications
  • Supply and exhaust installations

Key features

  • Insensitive to dust collection
  • Enables flexibility in terms of space layout design
  • Individually calibrated for higher accuracies
  • Low pressure loss for reducing the noise level
  • Can be connected to Buildings Management System (BMS)
  • Halton Max Ultra Circular (MUC) technical performance:
    Velocity range 0,5 — 10,0 m/s
    General Measurement Uncertainty
    Accuracy ±5 %
    Minimum Safety distance 1D
    Expected Measurement Uncertainty, when correct installation parameter is applied ± % or l/s depending, which is the greatest of the percentage or the absolute value for the specific product size.
    Dim. 100 = ±5 % or ±1,00 l/s
    Dim. 125 = ±5 % or ±1,25 l/s
    Dim. 160 = ±5 % or ±2,5 l/s
    Dim. 200 = ±5 % or ±4,0 l/s
    Dim. 250 = ±5 % or ±6,5 l/s
    Dim. 315 = ±10 % or ±10 l/s
    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.

Operating principle

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

  • Modbus RTU network variable,
  • the control panel input,
  • an analogue standard signal.

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.

Key technical data

Description

Value

Duct connection sizes  ø100-315
 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
  • Attenuator: several size and material options available
  • Reheat coil: models with or without internal heating controller available
Standards and certifications
  • CE marking, ISO9001 compliance
  • Fire separation performance, smoke tightness
  • Corrosivity class, pressure class, air tightness class
  • Building material declaration, declaration of conformity
  • Environmental standards
Maintenance  Maintenance-free

Quick selection

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.1. Quick selection for Halton Max Ultra Circular within air velocity range 1-10 m/s

Rakenne ja materiaalit

 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

Toimilaitteet

Airflow control unit

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
  • Modbus RTU
  • Airflow controller user interface
  • Analog signal
 Power supply
  • 18…32 V DC
  • 20…26.4 V AC
 Cables
  • Length (sensors): 1000 mm
 Dimensions
  • Controller: 73 x 150 x 40 mm
  • Sensors: 42 x 76 x 37 mm
 Protection   class
  • Controller: IP52
  • Sensors inside duct: IP65
  • Sensors outside duct: IP52

Actuator

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

Dimensions and weight

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

Specification

Pressure-independent variable airflow control damper for supply and exhaust installations.

Construction

  • Damper includes airflow controller with the control panel, two airflow ultrasound measurement sensors, temperature sensors and damper actuator.
  • Duct connection includes integral airtight rubber gaskets.
  • Damper with blade gasket: the tightness of the control damper in closed position conforms to standard EN1751 class 4 and casing tightness to EN 1751 class C.

Material

  • Galvanised or stainless steel (EN 1.4404, AISI 316L).

Electrical data

  • Modbus connection or analogue
  • Control signal range of analogue control mode is for input 0…10 VDC or 2 …10 VDC
  • Feedback signal range of analogue control mode for output follows selected control signal range 0…10 VDC or 2 …10 VDC
  • Power supply voltage 24 V DC/AC

Parameter setting

  • Design airflow range limits are calibrated at the factory.
  • Controller settings are adjustable on site with Modbus connection or manually from the control panel

Accessories

  • Sound attenuator for noise reduction. An access panel can be added for easy maintenance.
  • Electric reheat coil with an internal heating controller. Power supply 230 VAC, less than 16A. A safety overheat thermostat with both automatic and manual reset, as well as an alarm relay with the possibility of remote alarm monitoring, are incorporated in the heater. A room controller is required to control the duct heater with a 0…10 VDC control signal.
  • Electric reheat coil without an internal heating controller. Power supply 230 VAC. A safety overheat thermostat with both automatic and manual reset is incorporated in the heater. A room controller is required to control the duct heater with a 0…10 VDC control signal.

Installation

Installation options

There are three options to position the damper. Sensors can be directed outwards, side or inwards in respect to duct parts like bend or T-branch subsequent in the airflow direction.

Safety distances

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.

To ensure the accuracy of the airflow measurement, the minimum safety distance has to be longer or equal to one duct diameter distance.

NOTE: The recommended safety distance is longer or equal to three duct diameters’ distance, to ensure optimal accuracy.

Wiring

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

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

Commissioning

Before the system startup the controller, installation parameter and optionally the Modbus communication parameters have to be set.

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:

  • 0 l/s for the minimum airflow rate
  • the maximum airflow rate corresponds to 10 m/s airflow velocity

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 78 283
125 122 441
160 201 723
200 314 1130
250 490 1767
315 779 2805

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).

Reheat coils

Description

Reheat coils are available as accessory. Main features:

  • Product models:
    • Model RM
      Without internal heating controller, PWM control signal input
    • Model RC
      With internal heating controller, 0…10-VAC control signal input. Built-in alarm relay with potential-free changeover contact for remote alarm monitoring. The alarm is triggered by manual overheating protection or heater power loss.
  • Sinlge-phase heater with 230 VAC, less than 16 A
  • Increased heater safety with two internal overheating protection devices (automatic and manual), connected in series.
  • EN 15727 class C tightness level
  • Available for duct sizes 100 – 400 mm
  • Power 600 – 3000 W

Technical data

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

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

NOTE: For further information, contact Halton Sales.

Sound attenuators

Description

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:

  • Three lengths: 600, 1000 and 1250 mm
  • Connection types
    • D2=D1
      The duct (D2) and damper (D1) connections are the same size
    • D2>D1
      The duct connection (D2) is one size larger than the damper (D1) connection
  • Insulation material options:
    • Polyester fibre (PEF), tested according to ISO 7235, class C tightness level
    • Mineral wool (MW), class C tightness level
  • Available with or without access panel for maintanance purposes

Technical data

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

Sound attenuators dimensions and weight

NOTE: Sizes 400 and 500 are 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.

Order code

MUC/S-D, MA-CU-FS-SA-RH-ZT

S = Model
G    With blade gasket

D = Size of duct connection (mm)
100, 125, 160, 200, 250, 315

Other options and accessories

MA  = Material
GS     Galvanised steel
AS     Stainless steel (EN 14404/AISI 316L)

CU  = Control unit
G2      GDB 161.1E, 5 Nm

FS   = Factory-set airflow limits
DS      Default factory settings (Vnom)
DC      Customer specified settings

SA  = Sound attenuator
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
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)

Code example

MUC/G-100, MA=GS, CU=G2, FS=DC, SA=NA, RH=NA, ZT=N

Downloads

Halton Max Ultra Circular (MUC) – Airflow management damper
Data
en
Halton Max Ultra Circular (MUC) – Ilmavirransäädin
Data
fi
Installation, commissioning and maintenance guide - Halton Max Ultra Circular (MUC)
Manual
en
1.28 MB
  • Max. file size: 128 MB.

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