Halton Vita VLR – Room airflow controller for Halton Vita Lab solutions

Overview

The Halton Vita VLR controller operates as a fundamental element of the supply and exhaust ductwork in the Halton Vita Lab solution. This solution is an independent stand-alone system, which can be connected via bus communication to the BMS system.

Intended for all kind of environments, especially clean rooms or laboratory rooms. Airflow measuring is based on differential pressure between averaging cross measuring tubes.

The room controller (Halton Vita VLR), equipped with a fast actuator and pressure differential sensor, controls the room airflow or pressurisation so that the desired room balance or differential pressure between the room and the reference space is achieved.

Application

• Airflow is measured with cross measuring tubes or orifice plate
• Airflow control damper for Halton Vita Lab solution
• Circular and rectangular pressure-independent variable airflow controller
• Room supply and exhaust airflow installations

Key features

• Stand-alone system
• Pressure-independent operation
• Airflow rate and room pressure control modes are available
• Project specific settings are preset and tested at the factory
• Several connection sizes between 100-630 mm
• Velocity range 1 — 6.5 m/s
• Can be connected to Buildings Management System (BMS)

Operating principle

Fig.1. Operating principle of Halton Vita VLR with VFH airflow damper

The airflow controller contains a cross-type airflow measurement probe, a VAV airflow controller, a fast actuator, differential pressure sensor and a blade (with or without gasket).

The airflow controller can function either as a supply or an exhaust unit. It maintains the required airflow through accurate measurement and airflow control, regardless of variations in the room conditions or duct pressure. The airflow measurement is based on a differential pressure generated by high-precision pickup tubes of the measurement probe. The tubes are engineered for sensitivity in low airflows and for low noise generation in high airflows.

Changes in room conditions can be adjusted manually from an end-user interface or by different sensors such as occupancy or room pressure sensors, thermostats or timers. The conditions can also be managed remotely from a building management system (BMS). The control signal and the airflow measurement data from the pickup tubes are processed in the Halton Vita VLR controller. The Halton Vita VLR controller gives the actuator a command to change the position of the damper blade, in order to keep the airflow at the predefined setpoint. The airflow setpoint can be modified between minimum and maximum settings from the room controller interface or a BMS.

Key technical data

Features and options

For more detailed information of the order code, see section Order code.

Solution description

Halton Vita VLR is a part of the Halton Vita Lab solution offering.

Fig.2. Halton Vita VLR + VKR airflow damper combined with a Halton Vita Lab Room controller, Halton Vita VPT

Halton Vita VLR is a controller especially designed for controlling the automation system of laboratory and cleanroom environment. It is used for controlling the ventilation airflow, room temperature, and indoor air quality.

The Halton Vita VLR automation package consists of a controller unit and optional components depending on customer needs: a wall panel and sensors for temperature, CO₂, occupancy and pressure.

In the laboratory room Halton fume cupboard ventilation controllers Halton Vita VLS are connected to the Halton Vita VLR via internal BUS. The holistic system includes all components for high required laboratory ventilation control.

Application area

• Controlling the ventilation airflow, room pressure, room temperature, and indoor air quality in the laboratory and clean rooms
• The Halton Vita VLR controller is an important part of the Halton Vita Lab system, controlling room conditions when Halton Vita VLS controls fume cupboards
• Overall Halton Vita Lab system includes:
  • Halton Vita Lab Room air conditioning applications:
    • Supply airflow
    • General exhaust
    • Room pressure
    • Temperature and CO₂
• Halton Vita Lab Solo fume cupboard control
• Halton Vita Lab Zone duct static pressure
• Local exhaust units and all ventilated components in the laboratory environment

Key features

• Factory-tested controller and wiring, easy to install
• Pre-installed project-specific parameters, quick to commission
• Several operating modes based on occupancy, thermal comfort, and indoor air quality
• Enables fully flexible layout solutions for changing needs in laboratory environment
• Highly energy-efficient and reliable system operation

Operating principle

Supply airflow control Halton Vita Lab Room is realized by

• racking the measured exhaust units; fume hoods and local exhausts
• setting the supply airflow setpoint to correspond the exhaust airflow rate
• applying a defined deviation between the exhaust and supply

Halton Vita Lab Room can also control

• the pressurization of the laboratory space based on the differential pressure measurement between the space and the ambient reference space

Halton Vita Lab Room –system can also maintain

• desired minimum air change in the room when exhaust airflow from exhaust units is insufficient
• room temperature either by general ventilation airflow rate control and/or by controlling the supply air temperature

Fig.3. System components for Halton Vita Lab solutions. 

Quick selection

Halton Vita VLR with VFH damper

Structure and materials

Fig.3. Halton Vita VLR with damper VFH 

Fig. 4. Halton Vita VLR with damper VKR, insulated model 

Dimensions and weight

Halton Vita VLR with damper VFH, without insulation

*) Without airflow controller box

Halton Vita VLR with damper VKR, without insulation

W = Width of duct connection [mm]
200, 300, 400, 500, 600, 700, 800

H  = Height of duct connection [mm]
150, 200, 250, 300, 350, 400

Specification

Halton Vita VLR+VFH/VFI

Pressure-independent variable airflow control damper for supply and exhaust installations, fulfilling the following requirements:

Construction

• Airflow is adjusted by the position of the blade and measuring is based on differential pressure over the orifice plate
• Damper includes components
  • Fast actuator, 2.5/4.0 s running time
  • Controller box (“Master”) or junction box (“Slave”)
  • Pressure transmitter
  • Airflow measuring tubing
• Duct connection with integral airtight rubber gaskets
• Complete shut-off function (blade gasket), complies with EN 1751 class 4
• Casing tightness complies with EN 1751 class C
• Damper with external insulation include a 50mm mineral wool

Material

• VFH: Galvanised steel
• VFI:  Stainless steel (AISI 316L)

Electrical data

Master

• Supply voltage: 230 VAC (230 VAC / 24 VAC -transformer included)
• Actuators / sensors supply voltage: 24 VAC
• Analog control: 2…10 VDC
• Analog measuring: 0…10 VDC (0-200 Pa)
• Modbus RTU, Modbus TCP, Bacnet IP -communication available via controller

Slave:

• Supply voltage 24 VAC
• Actuators / sensors supply voltage: 24 VAC
• Analog control: 2…10 VDC
• Analog measuring: 0…10 VDC (0-200 Pa)
• No bus communication

Parameter settings

Master

• Design parameters are calibrated at the factory. Halton service will verify all parameters during commissioning phase.
• Dampers are tested at the factory.
• Controller settings are adjustable with a PC- or a handheld tool

Installation

Wiring

The wiring must be carried out by professional technicians in accordance with local regulations. For the power supply, a safety-isolating transformer must be used.

Installation instructions and project-specific wiring diagrams are provided by Halton for all Halton Vita Lab Room system configurations.

For more information, see the Halton Vita Lab Room Design Guide available from Halton Sales.

Order code

VLR/S-C-T-D; L-H-M-IN-MA-FC-TF-CB-ZT

Order code example

VLR/A-B-200; L=NA, H=NA, M=S, FC=A1, TF=TF1, CB=CB1, ZT=N