OJ Electronics WLM3, WLTA3, WLTD3, WLCT3 Installation Manual

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WLDT3

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Installation Manual

WLM3

WLCT3

WLTD3

WLTA3

CONGRATULATIONS

Congratulations with you new control system for underﬂoor heating and cooling.

The control system has been developed to provide a temperature control system for room heating and cooling, integrating the switching of primary heating and cooling sources with the control of water temperature and mixing devices. This ensures the best possible comfort conditions and also reduces energy consumption.

Highlights of the system (depending on the units connected):

:: Heating and cooling control for true comfort :: Humidity sensor to prevent condensation on ﬂoors :: Energy saving comfort with adaptive function :: Area control for easy operation :: Flexible installation with wired and wireless connection :: Network communication for large applications :: Easy installation with plug and lead connections :: Outdoor temperature compensation (optional) :: Smart access with OJ FMSTM Gateway

for FS Master (optional)

CONTENTS

INSTALLATION MANUAL

WLM3 Underﬂoor Heating Controller ............................................. 4

Description ......................................................................................... 7

Product programme ........................................................................... 7

Overall system conﬁguration .............................................................. 8

Installation ......................................................................................... 9

Electrical installation .......................................................................... 9

Boiler demand (heat source) ............................................................. 9

Pump output .................................................................................... 10

Free relay function (X-OUTPUT) ....................................................... 10

Thermal actuators (thermoheads) .................................................... 12

External switch (timer) for night setback .......................................... 12

Room sensors - bus connection ..................................................... 13

Setting the channel........................................................................... 14

Room sensors - wireless setup ........................................................ 15

Supply water sensor and mixing valve ............................................. 16

Interconnection of WLM3 products .............................................. 17

Interconnections ............................................................................... 17

Special functions ............................................................................ 18

Creating a network ........................................................................... 18

Using cooling functions .................................................................... 19

Radiator mode .................................................................................. 20

2-step mode ..................................................................................... 20

Hot water mode ................................................................................ 21

Commissioning mode ..................................................................... 22

Replacing units ............................................................................... 23

Replacing a faulty room controller/sensor ....................................... 23

Guidelines and special features .................................................... 24

Power-up recommendations ............................................................ 24

Factory default settings .................................................................... 25

Error indication ................................................................................. 26

Special features .............................................................................. 28

Temperature and control .................................................................. 28

Replacing old masters ...................................................................... 29

Temperature control method ............................................................ 29

Emergency program ....................................................................... 29

Valve and pump exercising ............................................................ 30

Certiﬁcations................................................................................... 30

Disposal and recycling ................................................................... 30

Technical speciﬁcations ................................................................ 31

Waterline Add On Module - Type WLM3-xAO .............................. 33

Overall system conﬁguration ............................................................ 33

Technical speciﬁcations ................................................................... 33

Waterline Outdoor Compensation Module - Type WLOC3 ......... 34

Introduction ...................................................................................... 34

Installation ........................................................................................ 34

Bus connection ................................................................................ 34

Technical speciﬁcations ................................................................... 34

Waterline Wireless Receiver - Type WLRC3 ................................ 35

Connection of receiver to master ..................................................... 35

Position ............................................................................................. 35

Master .............................................................................................. 35

Setting up the system ...................................................................... 35

Technical speciﬁcations ................................................................... 35

Waterline Room Controller - Type WLCT3 ................................... 36

Introduction ...................................................................................... 36

Installation ........................................................................................ 36

Getting started.................................................................................. 36

Everyday use of the room controller ................................................ 39

Programming 4-event times and temperatures ................................ 40

Advanced settings and read-outs .................................................... 41

Reset to factory settings - room controllers ..................................... 46

Radiator Mode .................................................................................. 47

2-step mode ..................................................................................... 47

Hot water mode ................................................................................ 47

Batteries ........................................................................................... 47

Technical speciﬁcations ................................................................... 47

Waterline Room Sensor with Display - Type WLDT3 .................. 48

Introduction ...................................................................................... 48

Installation ........................................................................................ 48

Getting started.................................................................................. 48

Everyday use .................................................................................... 49

Advanced settings and read-outs .................................................... 50

Batteries ........................................................................................... 50

Waterline Room Sensors - Type WLTx3 ...................................... 51

Introduction ...................................................................................... 51

Installation ........................................................................................ 52

Setting room temperature ................................................................ 53

Setting room sensor operating mode ............................................... 53

Batteries (wireless)............................................................................ 54

Technical speciﬁcations ................................................................... 54

Floor Limit Sensor - WLCT3, WLDT3 and WLTD3 ........................ 54

* ON = Actuator output no. 1 is used as an ON/OFF signal for a dehumidiﬁer

WLM3 Underﬂoor Heating Controller

BR1025A09a

WLOC3

COOLING SWITCH

-GB

Wiring diagram WLM3-FS

Continuously PE only

BR1025A09a

BR1025A11a

345

-GB

Top PCB

OFF

Common UHF-PUMP

Commission mode

X-RELAY

Learn mode

Boiler test

Install mode

WLM2 Compatible

ON / OFF Control

String number (1-F)

Unit number (1-9)

BR1025A11a

BR1025A10a

-GB

OFF

Common UHF-PUMP

Commission mode

X-RELAY

Learn mode

Boiler test

Install mode

WLM2 Compatible

ON / OFF Control

BR1025A10a

To control X-OUTPUT (X-relay) for:

DIP-5 DIP-6 DIP-7

Boiler pump OFF OFF OFF

High-limit zone valve ON OFF OFF

Cooling device/module OFF ON *

Cooling device/module, alternative

ON ON *

Differential thermostat OFF OFF ON

BR1025A07a

WLOC3

COOLING SWITCH

-GB

Wiring diagram WLM3-BA

Continuously PE only

BR1025A07a

WLM3 underﬂoor heating controller

* ON = Actuator output no. 1 is used as an ON/OFF signal for a dehumidiﬁer

BR1025A11a

345

-GB

Top PCB

OFF

Common UHF-PUMP

Commission mode

X-RELAY

Learn mode

Boiler test

Install mode

WLM2 Compatible

ON / OFF Control

String number (1-F)

Unit number (1-9)

BR1025A11a

BR1025A10a

-GB

OFF

Common UHF-PUMP

Commission mode

X-RELAY

Learn mode

Boiler test

Install mode

WLM2 Compatible

ON / OFF Control

BR1025A10a

To control X-OUTPUT (X-relay) for:

DIP-5 DIP-6 DIP-7

Boiler pump OFF OFF OFF

High-limit zone valve ON OFF OFF

Cooling device/module OFF ON *

Cooling device/module, alternative

ON ON *

Differential thermostat OFF OFF ON

BR1025A08a

WLOC3

-GB

Wiring diagram WLM3-AO

Continuously PE only

BR1025A08a

WLM3 underﬂoor heating controller

The WLM3 underﬂoor heating controller is suitable for connecting multiple room controllers/sensors and electric actuators (thermoheads) for an underﬂoor or radiator-based heating system.

Only OJ room controllers/sensors type WLxx3 that are prepared for 2 wire or wireless communication can be used. For information on previous generations, see “Special Features - Replacing old masters”.

Description

Product programme

Product Thermoheads Type

Master for 8 zones 230V AC WLM3-1BA (basic system) Master for 8 zones with display 230V AC WLM3-1FS (full system) Master for 8 zones 24V AC WLM3-3BA (basic system) Master for 8 zones with display 24V AC WLM3-3FS (full system) Add-on module for 6 zones 230V AC WLM3-1AO Add-on module for 6 zones 24V AC WLM3-3AO

WLM3 underﬂoor heating controller

BR1025A02a

4567

OJ Waterline Master

WLM3 BA

BR1025A02a

BR1025A01a

OJ Waterline Add-On

9 10 11 12 13 14

WLM3 AO

BR1025A01a

BR1025A03a

1 23

4 5867

OJ Waterline Master

WLM3 FS BMS

BR1025A03a

Each master module is capable of controlling 8 heating zones, each of which may use one or more loops of piping, with one or more thermal actuators. These zones are referred to later in this manual as channels 1 to 8. If more than eight zones are to be controlled, it is necessary to install an add-on (AO) module, which provides another six outputs. The AO module then controls channels 9 to 14.

Overall system conﬁguration

Green: Power supply connected Red: Night setback active Red ﬂashing: Error

X-OUTPUT function active (see “Free relay function (X-OUTPUT)”).

Secondary UFH pump running

Boiler enabling signal active

1..8 Zones 1 to 8, indicating channel is active

Type WLM3-xBA

Type WLM3-xFS

Type WLM3-xAO

WLM3 underﬂoor heating controller

Attach the WLM3 master to a suitable wall. It will generally be convenient if the unit is situated within 0.8 m of the manifold, as most thermal actuators are supplied with 1 m cable. Cables can be run across the surface to the terminals using either the cable releases in the cover or by pressing out the cable entries in the lower part of the cover.

PLEASE ENSURE THAT ALL WIRING IS CARRIED OUT IN ACCORDANCE WITH LOCAL ELECTRICAL REGULATIONS.

When wiring is completed, ﬁt the cover on the master using the screws provided.

Mains supply WLM3 requires a 230V AC mains supply connected to the terminals marked L, N, & PE (Continuously PE only)

Electrical installation

Boiler demand (heat source)

The master has a volt-free relay output that can be used to control a boiler/heat pump or to open a motorised valve.

A) To control a heat source that requires switching of the live supply, take a link from L (230V) to the terminal marked BOILER - B1. Connect the heat source L to the terminal marked BOILER – B2. Connect the heat source N terminal to the N terminal on the master, and the heat source PE to the master terminal PE (see ﬁg. 4A).

B) To control a heat source that has a pair of dedicated terminals for remote switching (e.g. by a room sensor), connect these terminals to the terminals marked B1 and B2 on the master. B1 and B2 are “volt free” terminals and can therefore be used for either a 230V AC or a 24V AC circuit from the heat source.

BR965A13a

Fig. 3

Installation

Fig. 4a

BR965A14a

C) To control a motorised valve

Many motorised 2-port spring return valves have wires coloured BROWN and BLUE for power connections. In this case, BROWN must be connected to terminal B2 under the heading BOILER and BLUE must be connected to terminal N on the master. Then link the L (230V) terminal to the terminal marked BOILER - B1. The boiler relay will be energised after a delay of 10 seconds after the start of the main pump.

Basic versions without display. Type WLM3-xBA. The boiler relay will stop if no heat is demanded by the room sensors.

Versions with display. Type WLM3-xFS. These units have supply water temperature control. The boiler relay will switch ON once the control valve has opened 20% and will remain ON for as long as a heat demand exists.

The master has an output for the underﬂoor circulating pump (secondary pump). The output will be energised after a 180-second delay whenever any room sensor connected to the system calls for heat. The delay allows time for the thermal actuator to start opening.

The 230V AC pump can be connected directly to terminals L and N under the heading SEC. UHF PUMP . Connect the pump PE (earth) terminal to the PE (earth) terminal on the master. Maximum pump load must not exceed 4 amps, 230V at start up. There is an overrun period of 1 minute after heat is no longer demanded by the room sensor.

Delay times: Secondary UHF pump 180 sec. X-OUTPUT (conﬁgured as main pump) 190 sec.

Pump output

Free relay function (X-OUTPUT)

All WLM3 masters have a relay which can be utilized for a number of dierent purposes.

The relay is a volt-free output and is positioned on the PCB as shown in the drawing. The function of the relay is determined by the DIP-switch settings. The functions that the relay can control, and the corresponding DIP-switch settings, are as follows:

Installation

Fig. 4b

BR965A33a

Fig. 5

BR965A15b

Fig. 6a

BR965A15b

To control X-OUTPUT for: DIP-5 DIP-6 DIP-7

Boiler pump OFF OFF OFF

High-limit zone valve ON OFF OFF

Cooling device/module OFF ON *

Cooling device/module, alternative

ON ON *

Differential thermostat OFF OFF ON

* ON = Actuator output no. 1 is used as an ON/OFF signal for a dehumidiﬁer

The X-OUTPUT relay is volt free as shown in ﬁg 6a. If the relay is required to be used as an L & N switch, link the mains L terminal to the C1 terminal, then connect the L terminal of the device to the C2 terminal and the N terminal of the device to the mains N terminal.

Boiler pump

Where a primary boiler pump is to be switched on by the master, the relay output can be used for this purpose. The relay will be activated 10 seconds after the UFH circulating pump has started.

High-limit zone valve

This function is used where additional protection is required to prevent boiler water from entering the underﬂoor system when the system is OFF or when the supply water temperature exceeds 65°C. An additional sensor (ETF-522), referred to as ‘Application Sensor’ in ﬁg. 6d, is required and a zone valve must be connected via the X-OUTPUT (see example in ﬁg. 6c).

Cooling device/module

The relay output can be used to provide a volt-free signal to a heat pump or to a K-MOD switching module where a chiller is utilized to provide cooling water. The relay is ON when there is a cooling demand. (For further information, see “Using cooling functions”.)

Cooling device/module, alternative:

The relay output is always ON in cooling mode and OFF in heating mode. (For further information, see “Using cooling functions”.)

Dierential thermostat

The relay output can be used to enable use an alternative energy source, e.g. solar energy. In this case, the supply water sensor must be supplemented with an additional sensor (ETF-522), referred to as ‘Application Sensor’, which is used to monitor the temperature in the water storage cylinder of the alternative energy source. If the system detects (via the Application Sensor) that this temperature is more than 3°C higher than the supply water temperature, it activates the X-relay to select the alternative energy source via a valve and/or pump.

Installation

BR1025A10a

-GB

OFF

Common UHF-PUMP

Commission mode

X-RELAY

Learn mode

Boiler test

Install mode

WLM2 Compatible

ON / OFF Control

Fig. 6b

BR1025A10a

Fig. 6c

BR965A40a

BR1025A19a

WLM3-BA/FS MASTER

-GB

BOILER

MANIFOLD

Supply water sensor (if fitted)

Application Sensor (High limit sensor)

High limit zone valve

Bypass

Fig. 6d

BR1025A19a

Thermal actuators are ﬁtted to the underﬂoor manifolds and control the water supply through the various loops. The voltage of the thermal actuators, 230V or 24V, must correspond that of the master. WLM3-xBA masters are for 230V thermal actuators, while WLM3-xFSmasters/add-on modules are for 24V thermal actuators. Up to 8 dierent zones can be controlled by the master. Connect the thermal actuator(s) on the loop(s) for each zone to the corresponding terminals on the master. Thermal actuators for zone 1 must be connected to Output 1 terminals, thermal actuators for zone 2 must be connected to Output 2 terminals and so on.

Guideline

More than one thermal actuator can be connected to the terminals of a single output, provided that the heads are to be controlled by the same room sensor/controller. Connect the brown wire to the L terminal, and the blue wire to the N terminal. When installation is complete, check that the room sensor in, for example, room (zone) 1 operates the thermal actuator(s) on the manifold intended for that room. If the actuators appear to be in the wrong position on the manifold, it may be simpler to interchange them on the manifold rather than reconnect them on the master.

BR1025A12a

COOLING SWITCH

-GB

Timer W/volt free contacts. Open contacts for night setback.

Ext. Switch

Fig. 8

From the factory, the master is supplied with a jumper in the switch/timer IO terminals. The current operating setpoint of the master can be forced into night temperature by breaking this signal via an input from an external switch or timer. The input must be a volt-free switch, and will need to open the circuit for night temperature and close the circuit for day temperature. When the external switch or timer is used to switch to night setback, this will override any time settings in the WLCT3 room controller, including any room sensors that are part of a group allocated to that room controller.

External switch (timer) for night setback

Installation

Thermal actuators (thermoheads)

BR965A16a

Fig. 7

Room sensors - bus connection

Only OJ units which are suitable for two-wire communication can be used.

Standard installation cable of minimum 2 x 0.25 mm² can be used. Units can be connected in conventional star formation or in bus mode (daisy chain).

The master has 4 sets of terminals marked SENSOR/CONTROLLER BUS that can be used for connecting the 2-wire signal cable from the unit.

There are 4 identical sets of terminals for convenient installation. Any unit can be connected to any pair of terminals. The total length of the 2-wire system can be up to 300 m with a maximum length of 100 m between any two units. For further information, see the table below.

Remember to connect + to + and – to – .

Table: Length of cable

Standard cable Max. cable length from master to room

controller/sensor with display

Max. cable length from master to room controller/sensor without display

≥0.25 mm

Up to 100 m * Up to 300 m

≥0.50 mm

Up to 200 m * Up to 300 m

≥0.75 mm

Up to 300 m * Up to 300 m

*) Up to 300 m if operation without backlight is acceptable.

Installation

Fig. 9a

BR965A18a

SENSORS/CONTROLLERS CONNECTED IN STAR

Fig. 9b

SENSORS/CONTROLLERS CONNECTED IN BUS MODE

(DAISY CHAIN)

Fig. 9c

SENSORS/CONTROLLERS CONNECTED IN STAR SENSOR/CONTROLLERS CONNECTED IN BUS MODE

(DAISY CHAIN)

Setting the channel

Each room sensor can be set to operate a speciﬁc output which in turn controls a thermal actuator on the manifold. A selector can be accessed under the front cover of the unit where the number of its output (i.e. its channel number) can be set with a screwdriver (see ﬁg. 10). Up to 14 channels can be set on the selector, and there are two auxiliary channels (see later). A WLM3 master has 8 outputs. It can be connected with an add-on slave module with an additional 6 outputs, creating a system with 14 individual zones.

Please note that channels 10 to 14 are marked as A through E on the selector,

A room sensor set for channel 1 will activate the thermal actuator connected to output 1 on the master. The channel number can be set before power is connected to the system. The channel set on the room sensor can be changed afterwards if needed. If two room sensors are placed in the same room and set to the same channel, temperature will be controlled by the average of the temperature recorded by both units.

Channel 0:

Each Room sensor is delivered with the switch in position 0. It must therefore be set to operate correct channel output. Channel 0 can also be used for a room controller which is only used to control a group (area) of room sensors without actually controlling the room in which it is installed (e.g. a controller in the kitchen which is only used to control sensors located in other rooms). Setting the room controller to channel 0 means that times and temperatures must be set on the WLCT3 for the group (area). The WLCT3 will not, however, control a speciﬁc output itself.

Channels 1..14:

A room sensor set for Ch1 will activate the thermal actuator connected to output 1 on the master. If several room sensors are set to the same channel number, heating will be controlled in the following way:

- Actual room temperature will be calculated as an average.

- The room temperature setpoint will be calculated as an average.

- If ﬂoor sensors are connected to the room sensors: The lowest value of any ﬂoor sensor is used as the minimum limit temperature. The highest value of any ﬂoor sensor is used as the maximum limit temperature.

Channel 15 (position F on the switch): Party and holiday function. Special function. “Special Features” for further instructions.

Testing the system: See “Guidelines and Special Features – Power-up recommendations”.

Installation

Fig. 10

BR1026A07a

Jumper

-GB

BR1026A07a

BR1026A09a

Channal selector

-GB

Jumper

Button learning mode

Learning mode button

BR1026A09a

Room sensors - wireless setup

WLxx3-29 wireless room sensors/controllers must be paired with a WLM3 master for wireless communication.

To achieve this:

1. On the master, switch on DIP-3 to activate learning mode.

2. Initialize all wireless room controllers/sensors:

- Initialize analogue room sensors (WLTA3, WLTD3 and WLTM3) by removing the plastic battery pull

tab or pressing the internal initialization button (learning mode button) until a beep is heard.

- Initialize digital room controllers/sensors (WLCT3 and WLDT3) by pressing the pinhole button

(learning mode button) beside the clock or I symbol until a beep is heard.

When communication with a room controller/sensor has been established, the corresponding channel LED on the master will light up.

3. Switch o DIP-3 to deactivate learning mode.

Fig. 11a

Fig. 11b

Installation

Supply water sensor

This feature, which limits supply water temperature, is available on full system masters, WLM3-xFS. The supply water sensor should be connected directly to the master via the terminals marked Supply Sensor. A temperature sensor of type ETF-522 must be used. The sensor should be placed on the supply water pipe to the underﬂoor heating system. If a sensor is installed in a system without a weather compensation module (WLOC3), the master will maintain the design supply water temperature. The factory default setting can be changed via the display. If a weather compensation module (WLOC3) is added to the system, the master will vary the supply water temperature setting according to the outdoor temperature. A standard factory-programmed compensation curve is used for this purpose. If needed, the curve can be changed, see separate USER MANUAL, MASTER TYPE WLM3.

Mixing valve actuator control

A mixing valve actuator can be controlled by digital WLM3-xFS masters.

The actuator must be 24V AC powered (max. 6VA) and positioned via a 0-10V DC signal. It should be conﬁgured so that it closes the valve if there is no heating demand (0V DC signal). If required, the control signal can be reversed to 10-0V via the master's menu system.

Control action of the mixing valve actuator is P + I, and the parameters can be changed if required in the master's menu system.

Please contact your supplier for further instructions.

Installation

Supply water sensor and mixing valve

Fig. 12b

BR965A39a

Fig. 12a

BR965A19b

Interconnection of WLM3 products

Interconnections

* Although these connections are not

necessary, they are permitted

NOTE: The illustration shows the four internal RJ14 connectors of the WLM3 master.

The WLM3-xAO add-on module has only connectors points 3 and 4.

BR965A46a

For easy installation, interconnections between master modules, master and add-on modules, and master and wireless receivers are made with pre-wired plug-in connectors (RJ14). For connecting WLM3 add-on modules to WLM3 masters, a plug-in connector is provided with the add-on module. Similarly, a WLRC3 wireless receiver is connected to a WLM3 master using the plug-in connector provided with the receiver. For connecting a WLM3 master to another master in a network, a plug-in connector kit (WLM-NET) is available. CAT5 cable should always be used. If a connector kit is not used, it is possible to connect masters using standard RJ14 connectors. In this case, ensure that terminal 1 is connected to terminal 1 at the other end, and so on. The same type of connection can be used from a master to an AO module.

In large buildings with more than 14 zones where multiple manifolds are used, it is possible to use multiple masters to create a single network.

One master must be deﬁned as the “network controlling master” by setting both encoders to zero (see ﬁgs 13a and 13b).

Subsequent masters (up to nine) should be connected as a “string”, where they will all use a common pump.

If more than one pump is used, a separate string should be created for each pump (see ﬁg. 13a).

On the ﬁrst string of masters, all left-hand encoders must be set to 1, and the right-hand encoders set in sequence from 1 to 9. On the second string of masters, all left-hand encoders must be set to 2, and the right-hand encoders again set in sequence from 1 to 9. This numbering system can be continued for up to 15 strings.

All masters must be interconnected using special cable via RJ14 socket 1 or 2. (For further information, see “Interconnection of WLM3 products”.) All masters must be connected in a daisy chain, NOT in a star formation (see ﬁg. 13c).

An FS master can be used as the “network controlling master” to control central mixing of the supply water and boiler activation.

The “network controlling master” can also switch between cooling and heating for the whole network using the WLAC3 interface module connected to the thermostat bus.

Time and temperatures for the whole network can be controlled by a single WLCT3 connected to the “network controlling master” if the WLCT3 is set to channel F.

Special functions

Creating a network

Fig. 13a

BR1025A14a

WLM3-BA/FS

2,1

WLM3-BA/FS

2,2

WLM3-BA/FS

2,3

WLM3-FS

0,0

WLM3-BA/FS

1,2

WLM3-BA/FS

1,1

WLM3-AO

WLM3-BA/FS

1,3

-GB

Circulation pump control of each string

String 2

String 1

Boiler

4-port valve

Network communication

BR1025A14a

Fig. 13b

BR1025A11a

345

-GB

Top PCB

OFF

Common UHF-PUMP

Commission mode

X-RELAY

Learn mode

Boiler test

Install mode

WLM2 Compatible

ON / OFF Control

String number (1-F)

Unit number (1-9)

BR1025A11a

Fig. 13c

BR1025A18a

WLM3-BA/FS Master 1

WLM3-BA/FS Master 2

Master Cable

BR1025A18a

Type WLHX3

• Anetworkmustalwayscontaina“networkcontrollingmaster”.

• Onmasterssetforthesamestring(samesettingontheleftencoder),allpumps,boilerandvalve

outputs will act simultaneously, enabling the use of a common pump on each string.

• IfonlyoneUHFpumpisusedinanetwork,DIP-8onthenetworkcontrollingmastermustbesetto

“ON”, enabling the UHF pump output on this master to control a common pump for the whole system.

• Allmastersinanetworkfollowthesamesynchronizedtimingforactuators,pumps,boilersandmixing

valve output.

• Ifalowersupplywatertemperatureisneededononeofthestrings,therstmasteronthisstring

should be an FS master with a local mixing valve and supply water sensor attached.

• WithFSmasters,aspecialstatusmenuisavailableonthenetworkcontrollingmasterwhenanetwork

is detected. With this menu, it is possible to check the network. Please refer to the USER MANUAL for further instructions.

NOTE: For instructions on testing a network, see “Power-up recommendations”.

Using cooling functions

In addition to controlling heating, all WLM3 masters have the ability to control the cooling system.

• Toenablethecoolingfunction,aremoteheating/coolingchangeovermodule,WLAC3,andoptional

humidity sensor, WLHX3, must be connected.

• Alternatively, the cooling switch input on the master can be used to switch between heating and cooling.

• For instructions on using the X-OUTPUT as a cooling signal to control a chiller, reversible heat pump or

diverting valve, see “Free relay function (X-OUTPUT)”.

• 

With BA masters, where dew point control is required, it is also necessary to install a sensor (ETF-522) on the return water pipe of the ﬂoor heating system. The sensor must be connected to terminals 49 and 50.

Using the WLAC3 module:

• TheWLAC3modulemustbeinstalledinaconvenientpositionfortheuserandconnectedtothesensor/

controller bus as shown in the drawing.

• Ifa BMS system in used for the heating/cooling decision, a volt-free BMS signal (EXT) can be connected

to the WLAC3 and the slider switch on the right side of the WLAC3 must be set to the heating position (in this situation the BMS signal has priority and we recommend that the slider switch button be removed to avoid unintentional override). Alternatively the volt-free BMS signal (EXT) can be connected directly to terminals 47 and 48.

Humidity sensor WLHX3:

• WithaWLHX3humiditysensor,thesystemcanlimitcondensationonoorsurfacesduetohighhumidity.

• TheWLHX3 must be installed in a room that is representative of the general humidity level in the building

and connected to the sensor/controller bus. More than one WLHX3 can be used if necessary, e.g. on separate ﬂoors of the building. Where more than one humidity sensor is used, the master will use the reading from the sensor detecting the highest dew point for control purposes.

Special functions

BR1026A08a

WLAC 3

Sensor/ controller bus

EXT.

-GB

BR1026A08a

BR1025A10a

-GB

OFF

Common UHF-PUMP

Commission mode

X-RELAY

Learn mode

Boiler test

Install mode

WLM2 Compatible

ON / OFF Control

BR1025A10a

• If a dehumidiﬁer is used, it can be connected via a relay using output 1 on the master and setting DIP-7

to “ON”. (NOTE: This output gives either 24V AC or 230V AC depending on the type of WLM3 master. Channel 1 cannot be used for a room controller in this situation.)

• Whencoolingisenabled,thecoolingsetpointwillbedeterminedbythemasterandwilloverridethe

settings of any room controller to ensure optimum energy eciency. (The cooling setpoint will be +3°C above the master's day setpoint.)

Where a radiator circuit is used, it is possible to control room temperature with a special WLCT3 mode called Radiator Mode, thus optimizing energy savings. See “Waterline Room Controller - Type WLCT3”. The controller measures the temperature in the room, and a zone valve is then controlled via the WLM3 master, which in turn activates the boiler on demand.

• TheWLCT3shouldbeinstalledinaconvenientpositionfortheuserandwhere

the temperature is representative of the room or area.

• Connect the controller to the WLM3 master using the sensor/controller bus.

• ConnecttheradiatorzonevalvetoanoutputontheWLM3 master and set the

channel number on the room controller to the corresponding number.

• The special radiator controller is available in wired or wireless version.

NOTE: When the WLCT3 is in radiator mode and heat is demanded, it does not start the circulating pump of the underﬂoor heating system. When the system is in cooling mode, all radiator circuits will be o.

Special functions

Type WLCT3

Radiator mode

2-step mode

BR1025A22a

WLM3-BA/FS MASTER

-GB

STEP 1

STEP 2

BOILER

Additional heat

source in the room like a radiator

BR1025A20a

WLM3-BA/FS MASTER

-GB

BOILER

Radiator

It is possible to control a secondary heat source in a room (e.g. a backup radiator) using the special 2-step mode of the WLCT3 controller. See “Waterline Room Controller - Type WLCT3”. In addition to the primary underﬂoor heating output, 2-step mode is able to control a second output as a boost function. This output will only be activated if the required temperature cannot be achieved by the underﬂoor heating alone within a preset time period.

• TheWLCT3shouldbeinstalledinaconvenientpositionfortheuserandwherethe

temperature is representative of the room or area.

• ConnectthecontrollertotheWLM3 master using the sensor/controller bus.

• Set the channel number on controller to correspond with the output on the WLM3

master that is connected to the underﬂoor heating actuator.

• The next numerical output on the WLM3 master MUST be used for the secondary/boost function.

• Whenthesystemisincoolingmode,2-stepcontrolwillbedisabled.

• The 2-step controller is available in wired or wireless version.

NOTE: To avoid overloading the WLM3 master, we recommend that the secondary output is used as a signalling function for a remote relay. See “Technical Speciﬁcations”.

It is possible to control domestic hot water temperature with a special WLCT3 mode called Hot Water Mode, thus optimizing energy savings.See “Waterline Room Controller - Type WLCT3”. A sensor is connected to the controller and measures the temperature in the hot water storage cylinder. A zone valve is then controlled via the WLM3 master, which in turn activates the boiler on demand.

• Thesensor(ETF)shouldbeinstalledonthehotwatertake-opipeimmediatelyabovethestorage

cylinder. Use a ﬁxing strap to attach it tightly to the surface.

• TheWLCT3shouldbeinstalledinaconvenientpositionfortheuser.

• WiththeWLCT3inhotwatermode,connectittotheWLM3masterusingthesensor/controllerbus.

• Connectthehotwatersensortothesensorterminalsofthecontroller.

• ConnectthehotwaterzonevalvetoanoutputontheWLM3 master and set the channel number on

the hot water controller to the corresponding number.

The hot water controller is available in wired or wireless version.

NOTE: When the WLCT3 is in hot water mode and heat is demanded, it does not start the circulating pump of the underﬂoor heating system.

Special functions

Hot Water Sensor

Type WLCT3

BR1025A06a

2423

5453

-GB

Remote sensor for hot water cylinder

WLCT3 hot water mode

(Channel selector set to output 1)

Sensor/controller bus

BR1025A06a

BR1025A21a

WLM3-BA/FS MASTER

-GB

BOILER

Hot Water Cylinder

BR1025A21a

Hot water mode

1 2 3 4 5 6 6

23˚C

Max.

Supply temp.

Commissioning mode

Digital masters feature a special “commissioning mode”, which allows supply water temperature to be controlled to assist the drying out of a newly laid concrete ﬂoor.

To start this function:

• SetDIP-4to“ON”.

• Thiswillmaintainthesupplywatertemperatureat23°Cforthreedaysandwillfullyopenallmanifold

actuators.

• Then,forafurtherfourdays,thewaterwillbemaintainedatthemaximumsupplywatertemperatureset

in the WLM3 master menu while the manifold actuators will remain fully open.

• WhentheWLM3 master is operating in commissioning mode, the output LEDs will ﬂash consecutively

and the word “commissioning” will ﬂash on the display.

• The commissioning function is paused if the power supply is interrupted.

• Torestartcommissioningfromthebeginning,switchDIP-4to“OFF”andthenbackto“ON”.

• Todeactivatethefunction,switchDIP-4to“OFF”.

• After7days,commissioningmodeisendedandnormaloperationisresumed(evenwithDIP-4still

“ON”).

NOTE: This function conforms to BS/EN-1264 Part 4.

NOTE: Commissioning mode can only be activated on a WLM3-xFS master, and only if a supply water sensor is mounted. Otherwise, the function will be interrupted immediately.

Special functions

BR1025A10a

-GB

OFF

Common UHF-PUMP

Commission mode

X-RELAY

Learn mode

Boiler test

Install mode

WLM2 Compatible

ON / OFF Control

BR1025A10a

Replacing a faulty room controller/sensor

1. Identify the sensor/controller to be replaced from the ﬂashing output LED.

2. Switch OFF power to the master.

3. Replace the sensor/controller.

4. Switch ON power to the master.

5. Set the master to learning mode by switching DIP-3 to ON.

6. If the sensor/controller is wireless, press the learning mode button on the sensor/controller.

See “Installation” under “Waterline Room Sensors - Type WLTx”. If the sensor/controller is wired, proceed to step 7.

7. Check that the corresponding output LED has changed from ﬂashing to permanently ON.

8. Reset DIP-3 to OFF.

Important: Set the channel selector on the new sensor/controller to the same channel as the defective sensor/controller that is replaced

Replacing units

BR1025A10a

-GB

OFF

Common UHF-PUMP

Commission mode

X-RELAY

Learn mode

Boiler test

Install mode

WLM2 Compatible

ON / OFF Control

BR1025A10a

Power-up recommendations

For any other changes in the system, use the quick guide and start the install sequence from the beginning. When all connections are complete, we highly recommend that the connections between the sensors and thermoheads are tested using the procedure below:

System check:

Correct operation of the system can be checked using a special “Install Mode”. This enables the installer to individually test and verify each output.

Testing the system:

1. Switch on DIP-3 to activate learning mode: - the power LED will ﬂash quickly

2. Each red channel LED on the master should now be lit if a sensor/controller is present on that channel.

3. Switch o DIP-3 to deactivate learning mode again – the power LED will stop ﬂashing.

4. Set the setpoint on all adjustable room sensors/controllers to minimum.

5. Switch on DIP-1 on the master to activate install mode. Install mode will remain active for 2 hours.

Pumps, boiler, mixing valve and actuators should now be OFF.

6. Set the knob on the adjustable room sensor/controller in room 1 to maximum.

The red channel 1 LED should light up and the actuator on output 1 should activate, opening after a 1-3 minute delay depending on the type of actuator. Important: If the room sensor/controller is of wireless type, a delay of up to 5 minutes may occur before the channel LED lights up. The boiler will not operate during test mode unless DIP-2 is activated, see step 9 below.

7. Check that the UHF pump is running and that the mixing valve (FS master only) opens.

8. Check step 2 for all rooms.

9. Boiler test function: Switch on DIP-2. This closes the boiler start relay contacts for 1 minute.

10. To end system testing:

- Switch o DIP-1 to deactivate install mode.

- Switch o DIP-2 to deactivate the boiler test.

- Set all temperature knobs to default positions. Room sensors WLTA3, WLTD3 and WLTM3 to zero (centre position). Room controllers WLCT3/WLDT3 to 21°C (recommended).

- Set all override switches on WLTM3 and WLTD3 room sensors to automatic position (clock symbol).

Testing a network:

If a network of masters has been set up, communication between them must be tested. When the masters acting as network slaves are in install mode (DIP-1 is ON), their power LED will ﬂash brieﬂy whenever communication is detected (approx. every 3 sec). The WLM3-xFS network master features a menu option that allows the number of network slaves present on the system, and whether there are any errors, to be checked. (Please refer to the User Guide for information on this menu option). The system is now operating auto

matically.

TOTAL X

Guidelines and special features

Factory default settings

Master Settings Factory

settings

Own

settings

BA/FS Day temperature 21.0°C

Night temperature 18.0°C

OFF temperature 5.0°C

Floor limit temp., high 27.0°C

Floor Limit temp., low 17.0°C

FS Max. water temperature 55.0°C

Weather compensation

Cold (winter)

Outdoor temperature -3.0°C

Water temperature 45.0°C

Weather compensation

Warm (summer)

Outdoor temperature 20.0°C

Water temperature 25.0°C

Master Settings Factory settings

BA/FS Cooling mode Day cooling

temperature

Day heating temperature +

3.0°C

Night cooling temperature

Day cooling temperature +

3.0°C

Dew point safety zone Dew point + 3.0°C

Room temperature control

PI-control P = 5.0°C

I = 90 min

Floor Limit temperature control

P-control P = 4.0°C

Adaptive PWM control

Max. permissible room temperature ﬂuctuation

+/- 0.5°C

PWM time interval limits

15-45 minutes

Max. number of connected sensors

Wired and wireless 24

Sensor timeouts Wired 300 sec. (5 min)

Wireless 10000 sec. (2 h 45 min)

FS Minimum supply water

temperature for cooling

16.0°C

Supply water temperature control

PI-control P = 20.0°C

I = 300 sec.

Additional information

During normal operation the power LED will be ON when the master is energised. The red output LEDs (1 to 8 on the master and 9 to 14 on the add-on module) indicate whether the output relay is ON/OFF.

An error/fault is indicated if the power LED or one of the red output LEDs ﬂashes. The problem can be identiﬁed by the number of times a speciﬁc LED ﬂashes, as described in the following:

Error number will be indicated by the number of ﬂashes, with a pause of less than a 1/2 second between ﬂashes. Indication will be followed by a pause of 2 seconds, after which the sequence will be repeated. Error codes can also be seen in the service menu of WLM3-FS masters (submenu 2).

Flashing power LED (red and green)

Communication to the network has errors. On the network master, it indicates that communication to one or more of the masters acting as network slaves has been lost. On a network slave, it indicates that communication to the network master has been lost.

Flashing power LED (red)

E1, 1 ﬂash One or more room sensors, room controllers, WLHX3s or WLAC3s that are set to channel 0 or channel 15 are no longer sending data to

the network controlling master. The fault can only be corrected by replacing the unit. The master must then be hard reset (see next page).

(NOTE: If the room sensor is of wireless type, the error/fault message could be an indication that the power has failed and that the unit's

internal battery needs to be replaced.)

E2, 2 ﬂashes One or more units have been set to a channel number which does not exist in the system. For example, the message will occur if the

units are set to channels 9-14 and the required add-on (AO) module is not found in the system. The error can be corrected by setting the channel number of the unit to one that exists in the installed master/add-on module system.

E3, 3 ﬂashes Application sensor defective. The fault can only be corrected by replacing the temperature sensor. If the sensor has been deliberately

removed to change system operation, the master must be hard reset (see next page).

E4, 4 ﬂashes The outdoor compensation module (WLOC3) is defective. The fault can only be corrected by replacing the outdoor compensation module. If the module has been deliberately removed to change system operation, follow the HARD RESET instructions (see next page).

E5, 5 ﬂashes The external supply water sensor (type ETF-1899A) is defective. The fault can only be corrected by replacing the temperature sensor. If

the sensor has been deliberately removed to change system operation, the master must be hard reset (see next page).

E6, 6 ﬂashes Internal overheating. The master has its own internal overheating protection system. The problem can be remedied by improving

ventilation around the master module.

E7, 7 ﬂashes Defective internal overheating sensor. The master will operate as normal, but will no longer be protected against internal overheating. The

fault can only be corrected by replacing the master.

E8, 8 ﬂashes Communication to the AO module has been lost. The fault can be corrected by re-establishing connection to the AO module or by

replacing the AO module if it is defective. If the AO module has been deliberately removed, the master must be hard reset.

E9, 9 ﬂashes Total number of input units exceeded. Please contact the manufacturer or your local service engineer.

E10, 10 ﬂashes No connection to wireless receiver, type WLRC3.

Only one error/fault condition can be shown at a time. If more than one error occurs, they will be prioritised in the order described (E1, 2, 3…).

Error indication

Guidelines and special features

Flashing output LED (red):

A ﬂashing output LED indicates that the room sensor/controller on that channel has a fault/error. Error codes can also be seen in the service menu (submenu 2a).

E1, 1 ﬂash The master has lost communication to the room sensor. The fault can be corrected by re-establishing connection to the room sensor.

The fault condition will be automatically reset once correct communication is resumed. If the room sensor is defective and has to be replaced, or if it has been removed deliberately, the master must be hard reset. (NOTE: If the room sensor is of wireless type, the error/fault message could be an indication that the power has failed and that the unit's internal battery needs to be replaced.)

E2, 2 ﬂashes The internal sensor in the room sensor/controller is defective. The fault can only be corrected by replacing the room sensor/controller.

Once the new room sensor/controller has been installed, the master must be hard reset.

E3, 3 ﬂashes The ﬂoor sensor connected to the room sensor/controller is defective. Replace the faulty sensor. Reset is NOT required.

E5, 5 ﬂashes Two or more room controllers are trying to control this output. Check the “AREA” setting of the room controllers.

E6, 6 ﬂashes Channel engaged. Several functions selected for same channel. Possible causes of the fault:

- Channel 1 used for dehumidiﬁcation, but the channel is already active (engaged). This is only possible for channel 1.)

- Channels 2..14 used for the cooling output of in dual heating/cooling mode, but the channel is already active (engaged).

- Channels 2..14 used as step 2 output in 2-step mode, but the channel is already active (engaged).

- Channels 1..14 used for humidiﬁcation (humidity sensor), but the channel is already active (engaged).

RESET

Two dierent reset actions can be used.

HARD RESET (only valid in day temperature mode - sun symbol)

Press the OK (

√) button for 5 seconds to initiate a hard reset. Initiation will be indicated by all output LEDs (1-8) lighting up consecutively. This reset will

remove from the system any room sensor with a defective input sensor or any defective AO module. The fault message will be reset but the defective items will no longer be part of the system. For information on adding or replacing a new unit, see “Replacing equipment - Replacing a faulty sensor/ controller”. To erase the identity of the defective component from the master's memory, a hard reset must be performed. Hard resets do not alter the temperature settings already programmed into the master.

FACTORY RESET (only valid in day temperature mode - sun symbol)

Press the OK (

√) button for more than 15 seconds to initiate a total factory reset. Initiation is indicated by the ﬂashing of output LEDs 1,3, 5 and 7

alternating with the ﬂashing of output LEDs 2, 4, 6 and 8 (while the OK (

√) button is pressed).

A factory reset will return all programmed temperature settings to the factory defaults. It will also remove all room sensors/controllers from the master's memory and reset the system to accept only those room sensors/controllers that are functioning correctly. For information on reconnecting room sensors/controllers, see “Replacing equipment - Replacing a faulty sensor/controller”.

Guidelines and special features

SETTING TEMPERATURE

With masters with display, temperature setpoints can be altered on the display.

Room sensors with manual adjustment are capable of increasing or decreasing the preset day and night setpoints on the master by ±4°C for the heating zone they are controlling.

The WLCT3 room controller has its own day and night temperature settings that can be set separately. If room sensors with manual adjustment are attached to its ”group”, these will operate according to the same settings as the WLCT3. There will, however, still be the possibility of local ±4°C adjustment.

OVERRIDE FUNCTION

CHANNEL F OPERATION (Channel 15) By ﬁtting a WLTM3 sensor to a WLM3 system, and setting its hex encoder to Channel F, a single override function can be used to override all the automatic time and temperature functions of the master, including those areas independently controlled by a WLCT3 room controller. This can be especially useful for long periods where override would be beneﬁcial, including for example holidays and other periods of absence where a frost protection temperature needs to be maintained. By setting the WLTM3 in your system to Channel F, override could not be simpler. On the right-hand side of the controller is a slide switch with four positions which determines system functionality: AUTO – This allows the system to run automatically according to the times set on the WLM3 master and any WLCT3s DAY - This keeps the system running according to the ‘day’ temperature setpoint. Any WLCT3s, or sensors controlled by them, will not be aected by this operating mode. NIGHT - This keeps the system running according to the ‘Night’ temperature setpoint. Any WLCT3s, or sensors controlled by them, will not be aected by this operating mode. OFF – This eectively turns the system OFF, although a ‘Frost Protection’ temperature of 5°C will be maintained in this operating mode. If you would like these functions to be added to your existing system, please consult you installer or service engineer.

EXTERNAL TIMER (see also “Installation - External switch”)

The external switch or timer function on the master allows the whole system to be forced to use the NIGHT setpoint. The external switch must have volt-free contacts that are OPEN for the NIGHT setpoint, and CLOSED for the DAY setpoint. The factory-ﬁtted link wire should be removed when an external switch/timer is used.

If a WLCT3 room controller is used in a part of the system, using the external switch to select the NIGHT setpoint will override the room controller.

Special features

Temperature and control

Backward compatibility must be considered if an old master is replaced with a new WLM3 master. If any of the connected room sensors or room controllers are of the old type, DIP-9 (WLM2 Compatible) must be switched to ON. This sets the WLM3 master into low-power bus mode and ensures that the old units are able to communicate with the new WLM3 master. In this mode, it is permissible to mix WLxx3 and previous generations of room sensors/controllers and other units connected to the bus.

NOTE: The backlight on WLCT3 and WLDT3 will be disabled in WLM2 Compatible mode.

Emergency program

Emergency program for room control

- If a room sensor/controller is defective, or communication to the unit is interrupted, an alarm will be

triggered. Depending on the system conﬁguration, control will continue in one of the following ways:

- If there are several units on the same channel, including a room sensor which is still operative, control will

continue as before, although without any contribution from the defective unit.

- If no operative room sensor/controller is found, the system will run constantly at 20% ON.

- If an outdoor sensor is connected, the system will run at 40% at outdoor temperatures of 10°C or lower,

decreasing to 0% at 20°C or more.

The emergency program is only available for channels used for heating control. Channels used for cooling control will always run at 100% OFF in connection with a defective room sensor. With heating and cooling installations, the system will always run at 100% OFF during cooling periods in connection with a defective room sensor.

Emergency program for supply water sensor

- If the supply water sensor is defective, the system will run constantly at 20% ON for the valve.

- If an outdoor sensor is connected, the system will run at 40% at outdoor temperatures of 10°C or lower,

decreasing to 0% at 20°C or more.

Replacing old masters

Temperature control method

As default, the system controls temperature on the basis of the advanced PI control method, which ensures high accuracy and long lifetime of the system.

In some cases, however, it may be preferable to use the simpler ON/OFF control method.

This is possible by activating DIP-10 (ON/OFF Control).

NOTE: Using ON/OFF control will make temperature control a little less accurate but the system will react faster to changes.

Certiﬁcations

Disposal and recycling

Valve and pump exercising

If valves or pumps are not used for automatic ON/OFF sequences over a 72 hour period, the components will be exercised. The actuators will be activated for 3 minutes. The pumps will be started for 10 seconds during that period, and the mixing valve, if ﬁtted, will be opened and closed.

CE marking

OJ Electronics A/S hereby declares that the product conforms with the following Directives of the European Parliament and of the Council:

Master

CE - 1993/68/EEC LVD - low voltage directive: 2006/95/EC EMC - electromagnetic compatibility: 2004/108/EC RoHS - restriction on the use of certain hazardous substances: 2011/65/EU WEEE - waste electrical and electronic equipment: 2012/19/EU

For other components, see the relevant instructions.

Applied standard(s)

Master EN 60730-1, EN 60730-2-9

Recycling of packaging

Protect the environment by disposing of the packaging in accordance with local regulations for waste processing.

Disposal of the product

Equipment containing electrical components must not be disposed of together with domestic waste. It must be collected separately along with other electrical and electronic waste according to local and currently valid legislation.

Technical speciﬁcations

WLM3-xBA

Purpose of control .........................Electronic temperature control of hydronic ﬂoor heating

Voltage ............................................................ 230V AC ±10%, 50 Hz

Output for thermal actuators WLM3-1BA......................................... 230V AC

WLM3-3BA.......................................... 24V AC

Max. total load (pumps, boiler and thermal actuators).......................................10 A

Output ......................................................8 outputs for thermal actuators

Control panel ....................................................... 1 LED indicates power

8 LEDs indicate thermal actuators 3 LEDs indicate pumps and boiler 1 LED indicates setback temperature Reset alarm and restore factory settings

Relay output ................................................Thermal actuators or zone valves

8 outputs, max. 2 A, direct Boiler, max. 5 A, voltage free Main pump, max. 5 A, voltage free Sec. pump, max. 5 A, direct

Control input......................................................Setback temperature, etc.

Temperature settings (permanent settings)

Room temperature............................................................. +21°C

Setback temperature........................................................... +18°C

Frost protection ................................................................ +5°C

Max. ﬂoor temperature ......................................................... +27°C

Min. ﬂoor temperature.......................................................... +17°C

Max. supply water temperature................................................... +55°C

Wireless communication .......................Can be achieved by connecting a receiver (WLRC3)

Ambient operating temperature ....................................................+0/+40°C

Method of mounting...............................................For mounting direct on wall

Type of action..................................................................Type 1.B.

Control pollution degree................................................................ 2

Software class ....................................................................... A

Overvoltage category ..................................................................III

Rated impulse voltage ...............................................................4 kV

Ball pressure temperature .......................................................... 125°C

SELV limit realized ................................................................ 5V DC

Enclosure rating ................................................................... IP 21

Dimensions........................................................H/130, W/315, D/53 mm

WLM3-xFS

Purpose of control .........................Electronic temperature control of hydronic ﬂoor heating

Voltage ............................................................ 230V AC ±10%, 50 Hz

Output for thermal actuators WLM3-1FS......................................... 230V AC

WLM3-3FS.......................................... 24V AC

Max. total load (pumps, boiler and thermal actuators).......................................10 A

BMS and smart access protocol ......................................Standard RTU Modbus ®

Output ...............................8 outputs for thermal actuators and weather compensation

Control panel ....................................................... 1 LED indicates power

8 LEDs indicate thermal actuators 3 LEDs indicate pumps and boiler 1 LED indicates setback temperature Backlit display

Relay output ................................................Thermal actuators or zone valves

8 outputs, max. 2 A, direct Boiler, max. 5 A, voltage free Main pump, max 5 A, voltage free Sec. pump, max. 5 A, direct

Control input......................................................Setback temperature, etc.

Temperature settings Factory settings Range Room temperature +21°C +5/+40°C Setback temperature +18°C +5/+40°C Frost protection +5°C +3/+8°C Max. ﬂoor temperature +27°C +20/+40°C Min. ﬂoor temperature +17°C +10/+30°C Max. supply water temperature +55°C +25/+85°C Weather compensation Factory settings Range Low outdoor temperature -3°C -20/+10°C Supply water temperature +45°C +30/+60°C High outdoor temperature +25°C +10/+30°C Supply water temperature +30°C +10/+40°C

Wireless communication .......................Can be achieved by connecting a receiver (WLRC3)

Weather compensation .........Can be achieved by connecting an outdoor temperature compensation

module (WLOC3)