ENERGY EFFICIENT Heating Cooling€¦ · As water based underfloor heating systems consists of a pipe system that transports the hot water from the manifold to the floor where the

Heating&Cooling

WATERBASED UNDERFLOOR CONTROL

IN ONE

©2011

OJ

ElectronicsA/S

ENERGY EFFICIENT

Intelligent ControlMaximum comfort withlow energy consumption

Save up to 55% CO2

2 © 2011 OJ Electronics A/S

INDEX

OJ WaterlineTM energy efficient system

for underfloor heating .....................................3

Heating & cooling system in one .....................4

Green Comfort - save up to 55% energy .........6

Additional system features ..............................8

Wired and wireless communication .................9

Room sensor/controller features ...................10

Building Management Systems (BMS) ...........11

OJ WaterlineTM Master ...................................12

OJ WaterlineTM room sensors/controllers .......13

Masterprogramme .........................................14

Room sensor/controller programme ..............15

3© 2011 OJ Electronics A/S

OJ WaterlineTM

Energy efficient system forunderfloor heating

:: Save up to 55% energy compared to simple heating control systems

:: Comfort advantage with adaptive function

:: Heating and cooling control for true comfort

:: Humidity sensor to avoid condensation on floors

:: Area control for easy operation

:: Flexible installation for wired and wireless connection

:: Network communication for large applications

:: Easy installation with plug and lead connections

:: Optional weather compensation

BR

-096

5-A

10

Heating & Cooling system in one

The waterline system from OJ Electronics has been developed to provide a temperature

control system for room heating and room cooling, integrated with switching of the primary

heating and cooling sources, and the control of water temperature and mixing devices.

This ensures the best possible comfort conditions and also reduces energy consumption.

Special demandsUnderfloor heating makes specialdemands on the control system as usersare in direct contact with the heatedsurfaces. A pleasant floor temperature,maintained within specific limits, istherefore required.

It will feel unpleasant if the floortemperature remains excessive for longperiods, but comfort will naturally be lostif the room temperature falls too low.

Heating functionsThe OJ WaterlineTM system providestrue comfort through precise roomtemperature control, always ensuringoptimal energy and savings throughadvanced control of boilers, pumps etc.

Cooling functionsIn addition to controlling heating, allWLM masters have the ability to controlthe system for cooling.

• To enable the cooling function aninterface module WLAC and humiditysensor WLH have to be connected.

• By using the humidity sensor thesystem limits the formation ofcondensation on floor surfaces dueto high humidity.

• If cooling is being limited due to highhumidity a dehumidifier can beenabled by the master.

• When cooling is enabled the coolingset point will be pre-determined bythe master and will override anysettings in any room controller toensure optimum energy efficiency.

© 2011 OJ Electronics A/S


BR-0965-A08

The thermal actuator is gradually closed as the required room temperature isapproached, thus providing more accurate control and saving energy.

20.0°C

20.5°C

19.5°C

16.0°C

P-band 4°C 0-100% Heat output

Thermal actuatorsThe Master has 8 outputs for thermalactuators. If more outputs are required,an additional module can be connected,providing a total of 14 outputs. TheMaster and additional module areavailable with either 230 V or 24 Voutputs for thermal actuators.

Interconnection of WLM productsFor easy installation, interconnectionsbetween master modules, master andadd on modules, and master andwireless receivers, are made by pre-wired plug in connectors (RJ45)

Timer controlTime control of the system is by usingthe WLCT programmable controller, butan external 7 day time switch can beconnected to the master to control theentire system.

The system saves energy andprolongs service lifeTo improve reliability, the systemtests any thermal actuators, pumpsor mixing valves which have not beenin use for the last three days. Thisdoes not, however, apply for theboiler output relay.

1. Sensors signal heat demand.2. Master coordinates signals and opens

all relevant thermal actuatorssimultaneously. Opening intervals of15-45 minutes are used, depending onheat demand.

3. Secondary pump starts 3 minutes later,i.e. once all elements are fully open.

4. Main pump starts 10 seconds aftersecondary pump.

5. After another minute, the boiler isstarted. The system thus ensures thatthe boiler is only started if the heatdemand requires more than 3.5minutes of operation. The pumps arenot stopped until 1 minute after theboiler has been turned off to ensuremaximum utilisation of the residualheat contained in the pipes. Oncestopped, the boiler is not restarted forthe next 5 minutes.

Precise control of room temperatureWith traditional thermostat control, 100%heat output is provided for a given lengthof time. With PI control on the other hand,the water temperature for underfloorheating is controlled in relation to currentheat demands. If much heating or coolingis required, the thermal actuator will befully opened. Otherwise, opening iscontinually adjusted to suit currentdemand. PI control ensures rapid andstable control of room temperature, andallows optimum utilisation ofsupplementary heat sources, e.g.sunshine or people in the room.

BR

939A

26-G

B


GREEN COMFORT- Save up to 55%* energy

The WLM2 Heating & Cooling Waterline Master

System has been designed to maximise user

comfort with minimum energy consumption

using features such as, individual temperature

control, weather compensation and timed PI.

Weather compensation- save 10% energyAs water based underfloor heatingsystems consists of a pipe system thattransports the hot water from themanifold to the floor where the heat isneeded, there will also be an energyloss during that transportation. Thehigher the supply temperature is, thehigher the energy loss.To reduce this energy loss, a weathercompensation function can be added,which ensures that the supply watertemperature is reduced just to matchthe need according to the actualoutdoor temperature.Weather compensation can save upto 10%*.

Temperature setback- save 10% energyOn underfloor heating systems withlight floor constructions, it is energyefficient to lower the temperaturesduring night or when rooms areunoccupied.Setting back the temperatures 6 hoursduring night time and 6 hour during daytime is common.Assuming roughly that the systemreduces the energy consumption up to20%* during the setback period, thiswould give and average energy savingof up to 10%*.

Save 30% energy with individualroom temperature controlA common simple way of adjusting theenergy needed to maintain the indoortemperature independently of theoutdoor temperature, is to centrallyadjust the general supply temperatureaccording to the actual outdoortemperature.This however cannot handle thedifferent needs in individual rooms andin real life desired room temperatureswill almost never be achieved.In modern houses the need for betterand more precise room temperaturecontrol is more and more oftendemanded as well as buildingregulations has changed or is changingtowards this in many countries.To meet these demands, individualroom temperature controls aremandatory.Without individual room control thetemperature is often set higher thanneeded and cannot handle sun inletor occupation, which means that theenergy savings compared touncontrolled rooms can be seen ashigh as 30%*.

PI control benefits- save 20% energySimple bimetallic thermostats are wellknown to over and undershoot thedesired temperature by 1 to 2°C whichmeans wasting energy.PI controlled thermostats adjusts theenergy added into a room so over andundershooting is minimised.Compared to a cheap ON/OFFthermostat, PI controlled roomtemperature can save up to 20%*energy.

Save 50% energy withsynchronized pump controlSimple systems without synchronizedpump control often will keep the pumprunning more than needed.The reason for this is that individualrooms almost never call for heat at thesame time, and this means that insystems with more than a few roomsthe pump will be running most of thetime.By using synchronized pump control, allheat demands from the rooms arecollected and synchronizes the openingof actuator.This is possible by using PI controlledheating, that only adds the needed heatamount into a room.By doing this energizing the pump isreduced compared to anunsynchronized system.If an unsynchronized system with morethan 10 rooms is loaded 50%, thepump often is seen running nearly allthe time.On the WLM2 the synchronized actionensures that the pump only runs at50% of the time, which in theory meansup to 50% less running costs on thepump.


Energy savings with the WLM2:The WLM2 system can handle all of the previous mentioned energy saving functions. If the installation is meeting the mostmodern piping, insulation and floor construction types, this would in theory mean very high energy savings.

Energy savings compared against centralcontrolled heating systems, without individualroom temperature control:

-30% (individual room control)-20% (PI control)-10% (weather compensation)-10% (setback temp)

= energy reduction up to 55%*

Energy savings compared against simpleON/OFF individual room controlled heatingsystems:

-20% (PI control)-10% (weather compensation)-10% (setback temp)

= energy reduction up to 35%*

*These are estimations made under the commonly used assumption thatevery unnecessary extra degree room temperature adds around 5-10% ofenergy waste. This applies to normal well insulated houses, and the ener-gy waste increases further if the house is poor insulated.

varied, thus providing energy savings,but ensuring that the room will reach thecorrect temperature at the desired time.A WLCT room controller is necessary onthe system for the adaptive function tooperate.

System checkCorrect operation of the system can bechecked using a special “Install Mode”.This enables the installer to individuallytest and prove each output.

Networking possibilitiesIn large buildings with multiple areas it ispossible to use a master to create anetwork of multiple zones.• A “network master” could be a digital

version for centralized control of mixedsupply water or a basic master whereno mixing is required.

• “Slave Masters” can then be added tothe network to create additional zones.

• “Slave Masters” controlling a commonpump are connected as a string on thenetwork system.

• Up to 15 strings, each of up to 9masters, can be connected as anetwork.

• Switching between cooling andheating can be done via the “NetworkMaster”using a single WLAC interface.

Mixing valve controlTo obtain controlled supply watertemperature the digital master provides a24Vac, 0-10V output for the mixing valve.Control action is P + I and the parametersare adjustable in the master.The control signal can be reversed to10-0V if required.

Commissioning modeDigital masters include a special“commissioning mode”, which allows thetemperature of the supply water to becontrolled to assist the drying out of anewly laid concrete floor.

Note: This function relates to BS/EN-1264part 4.

Adaptive function (optimum start)The adaptive function allows the start timeof the heating system to be automatically

In large buildings with multiple areas it is possible to use a master to create a network of multiple zones.

Initially, the valve is opened 20%. Accumulatedhot water is then utilised before the boiler is turnedon. Once the boiler has been started, the mixingvalve will be fully opened.

BR-0965-A09


Additional system features

Domestic hot water controlIt is possible to control the domestic hotwater temperature with a specialcontroller to ensure optimum energysaving. A sensor from the controllermeasures the temperature in the storagecylinder. A zone valve is then controlledvia the WLM master, which in turnactivates the boiler on demand.

Radiator controlIt is possible to control a radiator circuitroom temperature with a special roomcontroller to ensure optimum energysaving.The controller measures the temperaturein the room, and a zone valve is thencontrolled via the WLM master, which inturn activates the boiler on demand.

2 step heatingIf there is a need for enabling asecondary heat source in a room (e.g. abackup electrical radiator), it is possibleto use a special room controller that willcontrol two separate outputs.The second output will be activated onlyif the temperature cannot be achievedwithin a preset time period.

Weather compensationThe digital Master is capable of compen-sating for outdoor temperature. All that isrequired is an outdoor compensationmodule and a supply temperature sensorto be connected.Based on current outdoor temperatureand heat demand, the Master varies thewater temperature of the underfloorheating by means of a 2, 3 or 4-waymixing valve.

Temperature settings on the Master are factory-programmed (curve 1) but can easily be altered usingthe display (curve 2).

Wired and wireless communication

BR-0965-A06

BR-0965-A07

Room sensors/controllers are connectedusing 2-core cable (0.25 mm2 ).

The outdoor compensation module is connected using2-core cable (0.25 mm2 ) while 4-core cable is used forthe receiver

Cable communication.Wireless communication.Receiver for wireless signal.3

2

1

1 2

3

WIRED AND WIRELESS COMMUNICATION

The master is universal and can be used for wireless

communication if a receiver is connected. Sensors

with either wireless or cable communication can be

combined in the same system.

Wired communicationLow-voltage sensors/controllers areconnected to the Master in star or seriesusing standard 2-core cables (0.25 mm2).The total length of cable may be up to300 m with a maximum of 100 mbetween any two units.

If the system is subsequently extended,the new room sensor/controller is simplyconnected to the nearest cable or roomsensor.

Wireless communicationThe Master is universal and wirelesscommunication is possible if a receiveris connected. A frequency band of 868MHz is used in order to maximisecommunication stability. Activating thesensors/controllers is extremely easy:simply set the Master in learning modeand then press the activation button onthe sensors/controllers.The sensors/controllers is powered bystandard AAA batteries and an alarmsignal indicates when these are runninglow.The alarm signal can be turned off for24 hours until the batteries have beenreplaced.

BR-0965-A07

BR-0965-A06


Area controlUsing the room controller, the buildingcan be divided into various areas, eachcontaining rooms with a similar patternof usage. Time and temperaturesettings can be made on the roomcontroller for each change of usage,and these settings then apply for all therooms within the area via a simpleprogramming function in the roomcontroller.

Users can still adjust the temperature ofan individual room by +/- 4C.

The room controller can be placed, andused, to control one of the rooms withinthe area, or it can be placed outside ofthe area, in a central position, for theconvenience of the user. Therefore, atypical installation could have two orthree room controllers placed in acentral position and controlling all therooms within the building.

Room sensor/controller features

AREA 1 AREA 2


Simple sensor and controlleractivationThe number of the output for thethermal actuator to be activated by theroom sensor/controller must be set onthe channel selector located behind thesensor/controller cover. If, for example,channel 4 is selected, the roomsensor/controller will activate thethermal actuator connected to output 4on the Master.

Manual controlA room sensor with function selectorcan be installed, allowing permanentoverride for that room to either setbackor off condition.

Building Management Systems (BMS)


BMS – simple operation of severalapplications in modern buildingsSpecial BMS versions of the OJWaterline Master offer an RS-485BMS interface to support theincreasing need for BMS systems incommercial installations and to meetthe requirements of intelligentbuilding management.BMS is short for BuildingManagement System - a generic termfor systems that can communicatewith and control the various electronicequipment found in modern buildingssuch as

• Alarms• Ventilation• Lighting• Access• Heating & cooling

BMS systems are operated from acentrally placed PC or terminalcontaining the customised BMSsoftware.

BMS systems are used in large installations because:- They ensure central access for the maintenance of building controls.- They allow control system balancing so that, for example, ventilation and floor

heating do not “fight” against each other.- They enable remote control of various functions.

With BMS, OJ Waterline is able to read and set all individual room and floor limit temperatures.

This is very useful – in a hotel, for example, where the BMS terminal can be placed in reception. TheBMS software could be designed in such a way that the receptionist can graphically select a room andactivate the heating system when the room is booked.

BR-0965-A09WARM-WASSER-BEREITER

NETZWERK BUS

MISCHVENTIL

WASSER-VERSORGUNGS-TEMPERATUR-FÜHLER

WARM-WASSER-BEREITER

NETZWERK BUS

MISCHVENTIL

WASSER-VERSORGUNGS-TEMPERATUR-FÜHLER

The OJ Waterline BMS interface enables the following additional functions:

• Read and set all individual room and floor limit temperatures• Status read-outs for all outputs, e.g. pumps, boiler and actuators• Read and set weather compensation values• Override functions to support testing• Read-outs from all masters in an OJ Waterline network through the OJ Waterline BMS network master

THE MASTER PROVIDES SYSTEM BRAINPOWER

Based on the room temperatures, the master ensures optimum operation of boilers,

pumps, and – on the digital master, water temperature control. It is especially important

that operating temperatures are optimised as these are of crucial importance for energy

consumption, and system service life.

OJ WaterlineTM Master

Digital Master with graphic display which lightsup when activated. Temperature parameters areillustrated by means of simple symbols andsettings can be changed using the up-arrow,down-arrow and accept buttons.

Standard master8 outputs for thermal actuators

Additional module6 outputs for thermal actuators

Master programme

Digital master8 outputs for thermal actuators and weather compensation

• Using an external temperature sensor,the Digital Master can compensatefor changes in outside temperatures.Water temperature is then adjustedautomatically.

• Room temperature demands arecommunicated to the Master bywired, or by wireless signals.

• Outputs are incorporated in themaster for the switching of thermalactuators, boilers, pumps, and mixingvalves.

• Temperature settings can be set onthe digital master by a simple 3button system.

• Indicator lights show the status of theoutputs, and also give error/faultmessages for simple diagnostics.

• Each master can control a maximumof 8 rooms/zones.

• An ADD ON module can extend thisto 14.

• A system with greater than 14 zonescan be controlled by using more thanone master in a network format (seepage 6)

• The Master can be used for coolingcontrol in addition to heating.

A cooling kit is required and thesoftware enables dewpoint control tobe achieved via a WLH room mountedhumidity sensor.

• A Master, primarily used for underfloorheating, can also be used fordomestic hot water control, and forcontrol of a radiator circuit, by theaddition of special versions of theroom WLCT controller (see productprogram and paragraphs on page 11-12)

Digital Master with graphic displayThe display lights up when activated andthe various temperature parameters areillustrated by simple symbols. Settingscan be changed using the up-arrow,down-arrow and accept buttons.A special service menu allows currentreadings for the following parameters tobe accessed at any time:• Outdoor temperature (if weather

compensation is connected)• Water temperature for the underfloor

heating.• Mixing valve control signal.

In addition, current room temperaturefor all room sensors/controllers in thehome can be displayed, as can currentfloor temperature if floor sensors areinstalled. Whether the roomsensors/controllers are functioningcorrectly can also be checked on thedisplay in a table listing all roomsensors/controllers.Error codes (E0 to E9) are shown iffaults occur, making it easy to locateand correct any faults.


© 2011 OJ Electronics A/S

OJ WaterlineTM room sensors/controllers

Sensors/controllers programme

WLCT2

1)

2)

3)

4)

1) Automatic comfort and setback temperatures2) Permanent comfort temperature3) Permanent setback temperature4) Permanent frost protection, approx. 5°C

Floor sensors provide additional comfort on tiledfloors and protection of wodden floors

WLTA WLTDWLTM WLTP

Sensors and controllers withwireless or cable communication• can be combined on the same system.• Wireless sensors use standard AAA

batteries and give an alarm signalwhen the batteries are running low.

• Cable connected sensors use a 5v dcbus system and standard 2 core(0.25 mm2) cable can be used.

• All sensors can be changed fromheating to cooling function by a remotesignal sent to the master via a WLACmodule.

A non adjustable version of the sensorcan be provided for public buildings AllWLM temperature sensors are elegantlydesigned for mounting on wall surfaces,or on wall sockets.

• Temperature adjustment is restricted to+/- 4C, preventing unintentionalsettings to very high or very low levels.

• Precise control is achieved by P+Iaction of the controlled output

• Optional floor sensors can be used toensure that floor temperatures arenever too high or too low

• A room controller provides fortemperature levels to be changed tosuit the occupancy of the room, thusensuring that energy is used efficiently.

• One room controller can control anumber of rooms with similaroccupancy timings, but stillmaintaining the local +/- 4Cadjustment for individual requirements.(see paragraph on area control, page 8)

• Wireless and cable type sensors.

Room sensors with functionselectorA function selector allows timersettings to be overridden. It is, forexample, possible to permanentlymaintain setback temperature in anunused guest room or to activate thecomfort setting in the living room ondays off when the setback settingwould otherwise have applied.

Room controller with timerEnergy consumption can be reduced ifthe temperature is lowered at night andduring weekday daytime hours. Timecontrollers can thus save money.The controller is programmed forcomfort and setback periods for one ormore rooms with similar pattern of use,e.g. three bedrooms. (see Save energy, page 4)

Room sensors/controllers in general These are specially designed forwaterbased underfloor heating systems.Models with wireless or cablecommunication are available and bothtypes can be combined in the samesystem. As many as 24 room sensors/controllers can be combined in a singlesystem, and each of them is capable ofcontrolling one or more thermalactuators. Should a room sensor fail, thesystem maintains a minimum of 20%heat output, thus preventingunpleasantly low temperatures whenoccupants return home.

Room sensor with external floor sensorThese room sensors have two sensors. An internal temperature sensor for roomtemperature control and a floor sensorwith higher priority that ensures floortemperature is maintained at acomfortable level all year round orprevents parquet floors from becomingexcessively warm.

13

Masterprogrammme


1 LED indicates power8 LEDs indicate thermal actuators3 LEDs indicate pumps and boiler1 LED indicates setback temp.Reset for alarm and factory settings

· Thermal actuators or zone valves8 outputs, max. 2 A direct Boiler, max. 4 A voltage free

· Main pump, max. 4 A direct· Sec. pump, max. 4 A direct

· Setback temp. etc.

-

Permanent settings:

1 21°C18°C5°C

27°C17°C55°C

-

230V AC

130/315/53 mm

WLM2-1BA

WLM2-3BA

WLRC-19

-

1 LED indicates power 8 LEDs indicate thermal actuators3 LEDs indicate pumps and boiler1 LED indicates setback temp.Backlit display

· Thermal actuators or zone valves8 outputs, max. 2 A direct

· Boiler, max. 4 A voltage free· Main pump, max. 4 A direct· Sec. pump, max. 4 A direct

· Setback temp. etc.

· Outdoor compensation module · Supply temperature sensor

(incl. with Master)For mixing valve:· 0-10 V control signal· 24 V, 6 VA voltage supply

Standard: Range:

1 21°C +5/+40°C18°C +5/+40°C5°C +3/+8°C

27°C +20/+40°C17°C +10/+30°C55°C +25/+70°C

Standard: Range:

-3°C -20/+10°C45°C +30/+60°C

25°C +10/+35°C30°C +10/+40°C

230V AC

130/315/53 mm

WLM2-1FS

WLM2-3FS

WLRC-19

WLOC-19

1 LED indicates power 6 LEDs indicate thermal actuators

· Sec. pump, max. 4 A direct

-

-

230V AC

130/315/53 mm

WLM2-1AO

WLM2-3AO

-

-

8 outputs for thermal actuators 8 outputs for thermal actuatorsand weather compensation

6 outputs for thermal actuators

Control panel

Relay outputs

Control input

In/Outputs for weather compensation

Temperature settings:

Room temperature -Setback temperature -

Frost protection -Max. floor temperature -Min. floor temperature -

Max. supply water temperature -

Weather compensation:

Low outdoor temperature - Supply water temperature -

High outdoor temperature - Supply water temperature -

Power supply

Dimensions (H/W/D)

Master types and accessories:

Outputs for 230 V thermoelements

Outputs for 24 V thermoelements

2 Receiver for wireless signal

Outdoor compensation module forweather compensation

WLM2-BA-COOL

WLM2-FS-COOL

Cooling kit:

Cooling kit for standard masters

Cooling kit for digital masters

1) Room temperature can be adjusted ±4°C via the thermostat.2) Wireless communication can be achieved by connecting a receiver (type WLRC-19) to the Master. Dimensions: (H/W/D) 80/80/24 mm.

STANDARD DIGITAL ADDITIONAL MODULE

Room sensor/controller programme


±4°C

-

Internal

-

80/80/24 mm

±4°C

Auto, comfort,setback, frost

2 Internal

-

80/80/24 mm

±4°C

Auto, comfort,setback, frost

Internal

Incl. floor sensor

80/80/24 mm

-

-

Internal

-

80/80/24 mm

+5/+35°C

Auto, comfort,setback

Internal

Can be connected

80/80/24 mm

WLTA-19

WLTA-29

-

-

WLTM-19

WLTM-29

-

ETF-944/99H

WLTD-19

WLTD-29

ETF-144/99A

-

WLTP-19

WLTP-29

-

-

WLCT-19

WLCT-29

ETF-144/99A

-

StandardSensor type Standard withfunction selector

Standard withfunction selectorand floor sensor

Non-adjustable 4-eventtimer thermostat

Temperature adjustment

Functions

Room sensor

Floor sensor

Dimensions (H/W/D)

Thermostat type:

Cable communication

1 Wireless communication

Floor sensor type

External room sensor type

WLCT-19/RWLCT-29/R

3 WLCT-19/HW3 WLCT-29/HW

WLCT-19/2WLCT-29/2

Special types:

Radiator control

Domestic hot water control

2-step control

1) Supplied complete with AAA batteries. 2) External room sensor can be connected instead of internal sensor.

3) External sensor included, temperature range +5/+80°C.

For mounting direct on wall or in wall socket.

MORNING: It is the weekend so the day starts later

06:00

08:00

16:00

17°C

22°C

22°C

17°C

23:00

08:00

23:00

21°C

19°C

Symbol Time Temp. Explanation4-event timer controllerWith a WLCT controller with integratedtimer, energy consumption can bereduced by automatically lowering thetemperature at night and during weekdaydaytime hours.Besides the current time and weekday,the controller display also shows theactive comfort or setback period usinglogical symbols.The controller is pre-programmed withcomfort and setback periods but thesecan easily be changed to suit personalrequirements. The table shows thesymbols used and the factory-programmed periods and temperatures.

Program for weekdays, Mondays-Fridays:

Program for Saturdays and Sundays:

MORNING: The day begins

OUT: At work, school, etc.

HOME: The family returns home

NIGHT: Bedtime

NIGHT: Bedtime

ROOM SENSORS CONTROLLER

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OJ ELECTRONICS A/S

STENAGER 13B

DK-6400 SØNDERBORG

DENMARK

T.+45 73 12 13 14

F.+45 73 12 13 13

[email protected]

WWW.OJELECTRONICS.COM

OJ ELECTRONICS UK

CRUSADER PARK

WARMINSTER

WILTSHIRE, BA12 8SP

UNITED KINGDON

T.+44 01985 213 003

F.+44 01985 213 310

[email protected]

WWW.OJUK.CO.UK

Founded in 1964, OJ Electronics develops

and manufactures specialised solutions for

underfloor heating and HVAC controls and

power. Combining in-house R&D with state-

of-the-art production and quality-assurance

technologies, OJ’s products are acclaimed

for design, functionality, ease of installation

and reliability.

It is important for OJ to develop the best

solution for our customers, focusing on

maximum comfort with minimum energy

consumption.

Documents

ENERGY EFFICIENT Heating Cooling€¦ · As water based underfloor heating systems consists of a pipe system that transports the hot water from the manifold to the floor where the