Total Solutions for Room Temperature Control in Buildings:

Fan Coil Units and

Variable Air Volume Control
Lowering costs and increasing efficiency
When planning and designing the construction or refurbishment of any industrial or commercial building, the
costs of installing and running its heating and air conditioning system is a major concern. Other considerations
that affect the choice of supplier will be the time it takes to install and commission a system, and the overall
efficiency of the equipment once in operation. With modern businesses seeking to conserve energy wherever
possible, their priority is to find an effective solution that is both cost and energy efficient.

Invensys’ own knowledge and design experience combines to create the most effective and flexible
environment control solutions. Using the latest technology to meet the requirements of a company’s The passive infra-red (PIR) unit senses
particular working conditions, we can provide a system of temperature and air quality control that brings that no one is in the room and signals
to the controller to reduce the room
instant benefits to the building’s occupants, and sets new standards in climate management in the workplace.
temperature to save energy. When the
room is re-occupied the heating is
boosted to the set level.

Flexible solutions from Invensys

Invensys’ new range of controllers and field devices
provides flexible and intelligent control of room
applications, delivering the optimum temperature and air
quality to the right place at the right time.

The product range is designed to simplify the remote

monitoring of rooms and optimise energy consumption and
comfort conditions. With temperature controllers that can
be time-activated and managed through an office’s access
and security systems, room conditions can be adjusted to
meet individual requirements. Holiday schedules can be set
for all zones at the press of a button; alarms can be
reviewed and acknowledged without the need to access the
rooms. Also, because sensors in the room will switch off the
plant automatically when any particular space is
unoccupied, energy waste is kept to a minimum.

For complete management flexibility, each controller can be

used as a stand-alone device, or can be linked seamlessly to
a building management network, such as our MicroNet or When a meeting has been booked in
the board room, the management
Invensys Sigma systems.
system automatically starts the plant,
preparing the environment for the
Controllers are designed with built-in standard applications
optimum temperature at the right time.
and fitting features to keep installation costs to a minimum.
The Invensys range not only meets, but exceeds the
European Norm proposals for unitary control, aiming to Individual room temperature is
improve levels of comfort, air quality and energy usage boosted to the right levels when
the occupants access/security card
within work environments. is swiped on entering the building.

We’ve redefined room temperature control technology

 Benefits of an Invensys system
The Invensys solution is a highly scalable, easy-to-use system
comprising a full range of controllers, sensors, actuators and
valves. Built to industry standards and based on patented
technologies that deliver unrivalled performance, the system
provides a range of benefits for designers, fitters and
end-users alike.

Consultants have the advantages of:

■ A full range of products and support

Fan Coil and VAV ■ Product features that reduce preliminary design changes
Control Solutions and impact less on existing systems

■ Best performance products on the market

OEM’s can benefit from a system that offers:

■ Small and easily mountable designs

■ Excellent performance

■ Cost-effective solutions

The system presents fewer problems for installers:

■ Simple to fit and reduced commissioning time

■ Pre-loaded defaults for the most common applications

Benefits for end-users include:

■ An easy to use, low maintenance, long life system

■ Proven for accuracy and response

■ Easy to upgrade

■ Fully interoperable with a building management system

If someone opens the window, the

contact switch signals to the controller
to switch the heating off so that
energy is not wasted.

Controllers are easy to

install and commission.
Instant visual display and
control with S-link sensors
and interface.
Innovative designs increase efficiency and reduce costs
Invensys’ 80 years experience, knowledge and continuous development of products makes our designs unique
and ensures that we maintain a leading position in the building automation market. The range of valves, sensors
and controllers, as part of a VAV or fan coil system, delivers accuracy, reliability and durability that will make
interior climate management more effective, and give reduced energy consumption.

New
Bonsai® Valves VAV Controller with Integral Actuator
Bonsai is a small, high performance fan coil control loop solutions. The This Invensys design comprises a LONMARK compliant
revolutionary valve design, with configurable kv settings, delivers fast, heating/cooling controller, actuator and patented
accurate response, blockage-reduced operation and superior reliability. pressure sensor all in one dedicated unit. While
Bonsai is simple to install, can be re-configured in the field and gives providing highly efficient air circulation and accurate
unrivalled environmental control. environment control, the units are quick to install,
The innovative two-part cartridge gives superb shut-off, effective balanced creating a cost-effective solution by reducing both
by-pass and is self-cleaning. Its design requires very little torque to operate installation and maintenance costs.
the valve, so the small, proportionally controlled drive actuator achieves Design benefits include:
great energy savings. ■ Complete control loop in one unit
■ Long term accuracy
■ Reduced inventory
■ Commissioning tools for simple set-up

Bonsai features an ingenious clip-on Kv settings control, reducing the flow Stylish LCD Sensors interface with your system
and bypass area to create different Kv values. Setting the required Kv is
The MN sensor provides a simple user interface with the
easily achieved by clipping the appropriate snap-fit coloured clip to the
controller or building management system. Available in
valve. A manual positioning lever is provided for easy override and
five stylish options, the modern design suits a range of
hydraulic commissioning.
interiors, while the inbuilt LCD screen makes it easy to
select room temperature, fan speed, operating mode,
or emergency heat.
The simple sensor design offers unique benefits:
■ Two wire installation
■ Sensors can be swapped without any
Bonsai offers a range of benefits:
■ Kv can be configured on site complicated re-engineering
■ Reduced blockage ■ Data can be shared between controllers

■ Small size fits all requirements

■ Easy to fit and commission
■ Long, trouble free life Full range of Application Specific Controllers
■ Dedicated application-specific controller

Our design options mean that you can select the right controller for the
job, from basic LON to multi-featured NCP units, without wasting unused
I/O capacity. Designed to meet specific applications, each has its own
control strategy function to maximise energy efficiency. These are based
on the latest EN standard drafts to meet CEN requirements.
Controllers can run in any of three operating modes, ‘Comfort, Economy
104mm or Night (off)’. In ‘Night’ operation the room temperature is monitored for
Valve open
a frost temperature condition to provide maximum protection to the
Valve open building. For added flexibility the controllers can be used as standalone or
Patents applied for: networked to a building management system.
GB0012541, US09/310935,
EP99303777, CN01802150
Height The range is designed to offer:
104mm ■ Competitive solutions (you only pay for what you need)
■ Reduced installation and commissioning time
■ A choice of LON or NCP controllers
Matching customer’s needs with flexible solutions
We offer a comprehensive range of products so whatever the application, we have
a controller to match, creating a total solution tailored to specific needs.

Variable Air Volume (VAV) Applications Fan Coil and Terminal Unit Applications

Standalone or Networked LON controller/actuators Standalone or Networked NCP and LON controllers
Application Type Application Control Fan Fan
on/off 1/2/3

Damper Integrated Waterside Heating only Yes Yes

T T
and reheat controller P 2-pipe P

Damper only Integrated Cooling only Yes Yes

T T
controller P P

Separated Changeover Yes Yes

T
actuator T P

Software based Cooling with Yes Yes

balancing tools electric reheat P
T

DX cooling Yes Yes

T
P DX

4-pipe Heating and Yes Yes

T
cooling P

Airside Heating only Yes Yes

T
P

Cooling only Yes Yes

T
P

Changeover Yes Yes

T
P

Networked Strategy Heating Yes Yes

T
and cooling P
NCP controllers can be networked to an IC-UniFact controller and
LON devices to an IC-LON controller on a MicroNet or Invensys Sigma Passive infra-red Changes set-points and operating
sensor modes based on occupancy
Management System. This creates a total building management strategy
with information and control accessible to the entire network. Window contact Changes set-points and operating
modes based on open window

Auto-changeover Changes cool/heat based on

COOL ➞ HEAT
stat T HEAT ➞ COOL water temp. in pipe

Fan running Ensures that plant does not

status/airflow T operate unnecessarily

Sensor sharing T T T
Open plan offices need only
one sensor

DNN
Actuator slaving Open plan offices need only
one controller

IC-LON
Automated maintenance Demonstrates and ensures
and commissioning optimum performance

Overrides Allows pre-commissioning and

temporary adjustments
IC-UniFact
The Complete Solution

CZU Controller The CZU is an electronic modulating controller for Controller Inputs/outputs Comms.
terminal units or fan coils in air-conditioning systems CZU 4201 1 x DI, 1 x UI, 3 x DO None
serving small zones of buildings such as individual
offices and hotel bedrooms. Controller requires a Data Sheet 2.201
24Vac supply.

MN Controllers This range of MicroNet Controllers are interoperable, Controllers Inputs/outputs Comms.
LONMARK® compliant units. When loaded with an MNL-5RF2 1 x DI, 1 x UI, 3 x DO LONWorks
application from WorkPlace Tech Tool they provide MNL-10RF2 1 x DI, 2 x UI, 4 x DO
control for packaged fan coils and similar applications. MNL-15RF2 3 x UI, 2 x DO, 2 x AO
Controllers require 24Vac supply. MNL-20RF2 2 x DI, 3 x UI, 6 x DO, 2 x AO
Data Sheets 10.070, 10.100

MN Controllers These are interoperable, LONMARK® compliant Controllers Inputs/outputs Comms.

controllers. When programmed using WorkPlace Tech MNL-110RF2 3 x UI, 4 x DO, 1 x 230Vac relay LONWorks
Tool they provide control for fan coil applications. They MNL-130RF2 3 x UI, 4 x DO, 3 x 230Vac relays
can function in a standalone mode or as part of a
LONWORKS® FTT-10 free topology network. Controllers Data Sheets F-26886, F-27040
require 24Vac supply.

UniFact® Pro UniFact Pro terminal unit controllers have been Controllers Type Inputs/outputs Comms.
Controllers designed to meet virtually any fan-coil heating/cooling URC-41N-100 on/off fan control (4-pipe) 2 x DI, NCP
application. A voltage-free input (a timer switch, digital URC-41N-101 ” (2-pipe) 1 x RI (temp),
room sensor or passive infra-red sensor) can be used to URC-41N-102 ” (DX cooling/electric heater) 1 x AI (setpoint),
Controllers

switch between the two modes. A second voltage-free URC-41N-103 ” (airside control) 4 x DO triacs
digital input is available for connection to a thermostat URC-51N-100 3-speed fan control (4-pipe) 3 x DO relays
for automatic changeover between cooling and heating URC-51N-101 ” (2-pipe)
modes for 2-pipe fan coil unit (FCU) applications. The URC-51N-102 ” (DX cooling/electric heater)
controller meets all the latest CEN application URC-51N-103 ” (airside control)
requirements and offers low cost engineering without Data Sheet 10.130
maintenance. Controllers require 230Vac supply.
Accessories: Infra-red/RS 232 Receiver, NCP Palm Commissioning Software

Bonsai® Controllers Bonsai controllers are dedicated unit for Bonsai valves. Controllers Type Inputs/outputs Comms.
(Pro and Lite) The control loop offers incredible performance Bonsai Pro (networkable) 2 x DI, 1 x DI (temp), NCP
features and can be programmed locally or connected BRC-41N-100 on/off fan control (4-pipe) 1 x AI (setpoint),
to Invensys Sigma or MicroNet if required (Bonsai Pro). BRC-41N-101 ” (2-pipe) 1 x DO triacs (-101 only),
Alternatively it can be left to function standalone BRC-51N-100 3-speed fan control (4-pipe) 3 x DO – relays,
(Bonsai Lite). The controllers meet all the latest CEN
BRC-51N-101 ” (4-pipe) 2 x Bonsai outputs
application requirements and offers low cost
engineering without maintenance. Plug-in connectors, Bonsai Lite (standalone) 2 x DI, 1 x DI (temp), None
colour coding and standard built-in applications make BRC-41N-500 on/off fan control (4-pipe) 1 x AI (setpoint),
them simple to install, commission and maintain. BRC-41N-501 ” (2-pipe) 1 x DO triacs (-501 only),
BRC-51N-500 3-speed fan control (4-pipe) 3 x DO – relays,
Bonsai Pro are 230Vac controllers and have onboard
BRC-51N-501 ” (4-pipe) 2 x Bonsai outputs
fan switching relays. Bonsai Lite controllers require
24Vac supply. Data Sheet 4.102
Accessories: Enclosures, Set-point adjustment module

MN VAV Controller This variable air volume (VAV) controller is an Controller Control Inputs/outputs Comms.
interoperable, LONMARK®-compliant device. It provides MNL-V3RV2 Cooling, series fan, 1 x DI, 1 x UI, LONWorks
control strategies for pressure independent terminal induction, parallel fan 3 x DO, 1 x AO,
boxes, with or without reheat capabilities. Controller 2 x TO
requires a 24Vac supply. Data Sheet 10.121
Accessories: conduit enclosure, flow balance software

MN VAV Controllers These VAV controllers are interoperable, LONMARK®- Controller Type Control Inputs/outputs Comms.
Controller / actuators

with integral actuator compliant devices with integral actuator. They provide a MNL-V1RV2 Integral actuator Cooling 1 x DI, 1 x UI LONWorks
wide range of control strategies for pressure (no reheat)
independent terminal boxes, with or without reheat MNL-V2RV2 Integral actuator Cooling, series 1 x DI, 1 x UI, LONWorks
capabilities. Both models provide manual override and
and fan and/or fan, induction, 3 x DO, 1 x AO
an integral patented pressure transducer. Controllers
reheat control parallel fan,
require 24Vac supply. time prop.
Data Sheet 10.121
Accessories: shaft adapter, conduit enclosure, flow balance software

Bonsai® Valves Bonsai valves are specifically designed for fan coil Valve/actuators Size/Kvs
applications; accurate, quiet and fast, they complement BFB 1500 15mm – 1.6, 2.0, 2.5 Kvs *
Actuator / valves

modern processor control outputs and easily integrate BFB 1516 15mm – 1.6 Kvs
into the total solution. The valves are used with a BFB 1520 15mm – 2.0 Kvs
dedicated Bonsai controller which supplies their power. BFB 1525 15mm – 2.5 Kvs * Kvs is determined by a
selectable Kv clip.
BFB 1501 15mm – 0.4, 0.6, 1.0 Kvs *
BFB 1504 15mm – 0.4 Kvs
BFB 1506 15mm – 0.6 Kvs
Accessory:
BFB 1510 15mm – 1.0 Kvs
1m actuator extension lead
Data Sheet 4.102

Key: DI = digital input, UI = universal input, AI = analogue input, RI = resistive input,

DO = digital output, AO = analogue output, TO = thermistor output,
The Complete Solution (cont)

Digital Room Sensors This family of wall temperature sensors feature an S-link Sensor Type
communication protocol, which provides a simple two-wire MN-S1 Sensor only (no display)
interface for power and exchange of sensor and sub-base MN-S2 with override
information. These include selecting set-point, fan speed, MN-S3 with setpoint adjustment and override
operating mode, or emergency heat. Available in six models, MN-S4 with setpoint, override and controller mode functions
these sensors provide an integral analogue-to-digital conversion MN-S4-FCS with setpoint, on/off and fan speed functions
for elimination of sensor-to-controller noise effects and wire Data Sheet 10.000
resistance offset. Sensor Range - 0...50°C
Accessories: aluminium, plastic & wire guards, covers, designer inserts
Sensors

Room Sensors These temperature sensors are specifically used with UniFact Pro, Sensor Type
Bonsai Pro and Bonsai Lite controllers. Models have light that DU 4301 Sensor only (blank)
indicates when the controller is running and use the same single DUS 4302 with set-point adjustment
gang sized case. Data Sheet 1.020
Sensor Range - –5...+50°C
Accessory: guard kit

Duct Sensor The DDU temperature sensor is specifically designed for Sensing range Resistance at 20°C Fixing
use in return air space of terminal units. DDU 0001 –5...+40°C 5573Ω Direct
(non adjust.)
Data Sheet 1.030

Application and Product Selection

Function/associated products Controllers

URC-41N-100

URC-41N-101

URC-41N-102

URC-41N-103

URC-51N-100

URC-51N-101

URC-51N-102

URC-51N-103

BRC-41N-100

BRC-41N-101

BRC-51N-100

BRC-51N-101

BRC-41N-500

BRC-41N-501

BRC-51N-500

BRC-51N-501

MNL-V1RV2

MNL-V2RV2

MNL-V3RV2
MNL-11RF2

MNL-13RF2
CZU 4201

Networkable ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Standalone ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
2-pipe ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
2-pipe auto changeover ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
4-pipe ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Air side control (4-pipe) ✓ ✓ ✓
Actuator slaving ✓
Sensor slaving ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Fan on/off ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Fan 3-speed control ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
On board transformer ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
On board relays 1 1 1 1 3 3 3 3 1 1 3 3 1 1 3 3 1 3
Output for electric heater ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
DX cooling ✓ ✓ ✓ ✓
Room sensors DRT ✓
DU ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
DUS ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
S1 (S-Link) ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
S2 ” ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
S3 ” ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
S4 ” ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
S4-FCS ” ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Duct sensors DDU ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Inbuilt-sensor
DDT ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ “
Actuator/valves AVU, FEU * ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Integral
BFB (Bonsai) ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ actuator
AVUE * “ ✓
MVT, BVT * “ ✓
* These products are not shown in this brochure, please see data sheet for further information. AVU - DS 3.010, FEU - DS 4.101, AVUE - DS 3.001, MVT , BVT

These products are complemented by a full range of: Valves – an extensive family of 2, 3 and 4-port valves for water,
Actuators – model types are available for linear, rotary, unit, thermic media and steam applications. These range from small 15mm unit
and zone valves. Advanced models give improved performance, types to large 150mm flanged valves.
sensitivity, speed and built-in intelligence. Sensors – a stylish range of high performance sensors gives accurate
readings of air, water, flow, pressure, solar and outside temperature.
 Chilled Ceilings
We can offer a range of range of water or air cooled chilled ceiling
systems, and active or passive chilled beams, which provide noise free,
draught free radiant cooling for new or retro-fit installations.

Management Systems
Invensys has developed two fully scalable management systems based
on world standard platforms and open communication protocols;
● MicroNet Management System which is designed for small
to large sized buildings
● Invensys Sigma for large complexes requiring extensive
management reporting, energy saving/maintenance programs
and third party equipment integration.

Training
Invensys Climate Controls Europe is part of the Energy
We hold regular training courses at our worldwide training centres or
Management Division of Invensys Group Plc, the worldwide leader
on site, providing staff with a good working knowledge, practical
in electronics and engineering.
experience and awareness of our products and systems.
Invensys Climate Controls Europe has been formed through the
merger of Invensys Building Systems Europe (formerly Satchwell
Customer Care Centre
Controls Systems) and Climate Controls Europe. It brings together
The Centre’s aim is to provide a single point of contact for customers
the expertise of both companies in the design and manufacture of
regardless of the nature of their enquiry. Advanced routing
energy efficient products and systems for controlling, measuring
technology and dedicated telephone numbers ensure that all queries
and monitoring HVAC plant in industrial, commercial and
are resolved quickly and efficiently.
residential buildings, along with Climate Controls’ portfolio of
commercial refrigeration control products.
Engineering
The UK Engineering Division has full comprehensive project Invensys Climate Controls Europe is able to offer its customers the
management capability for engineering and designing turn-key benefits of expanded research and development programmes,
and bespoke systems, including installation and commissioning, standardised product platforms, strengthened distribution, and
in partnership with major contractors. world class service.

Climate Controls Europe

www.ibs.invensys.com

Printed in England 10/02 Invensys is a trademark of Invensys plc

©2002 Invensys plc. and its subsidiaries and affiliates. UniFact and Bonsai are a registered trademark of Invensys plc and its
All rights reserved. subsidiaries and affiliates.
LONMARK and LONWorks are registered trademarks of Echelon Corporation.
For data sheets
see inside table