VOKERA OpenTherm Installation & Operating Instructions Manual

Installation

& Operating

Instructions

THESE INSTRUCTIONS
TO BE RETAINED
BY USER

OpenTherm

Programmable room thermostat

This combined control RFT & OTR (trans­mitter & receiver) is for use only with the
following Vokera appliances:

• Unica HE

• Linea 28HE*,32HE*,36HE*

• Mynute HE

• Mynute VHE

*

Requires wiring kit

This combined control must not be used or
connected to any other appliance. This
apparatus must only be installed by a
competent person.

This control is comprised of a battery opera­ted transmitter (RFT) and a wired receiver
(OTR); the transmitter can be located within
any heated area* of the dwelling whilst the
receiver must be connected to the boiler**.

* The transmitter can be located up to 25-metres from

the receiver and must be located in an area that is
directly heated by the boiler

**The receiver must be connected to the boiler’s Open-

therm connections (see installation booklet) and be
sited no more than 1-metre from the boiler

These instructions must be read in conjunc­tion with the appliance installation booklet.

Isolate the appliance from the electrical sup­ply and remove the appliance casing. Locate
and remove the PCB cover that contains the
Opentherm terminals.

Remove the cover from the receiver and
using a suitable piece of 2-core flex, connect
the receiver to the Opentherm terminals of
the appliance and refit

the PCB cover and

appliance casing.

NOTE
The receiver can be mounted on a wall adja­cent to the appliance.

The combined control (transmitter & recei­ver) are coded and paired during the final
production test; it’s therefore not necessary
to pair the unit at the point of installation or
first-use. However if the transmitter/receiver
has been reset or either component (trans­mitter/receiver) is to be used with a replace­ment/different unit, it will be necessary to re­code and pair the new combination.

Ensure the transmitter has been set/left in
the coding mode (menu > service > coding
> OK) and press button B on the receiver for
approximately 5-seconds, LED A will light up
briefly. Press ESC to escape from the co­ding mode.

SPECIFIED USE

WARNING

2.0 PAIRING/CODING OF THE RECEIVER
WITH THE TRANSMITTER

1.0 INSTALLATION OF THE RECEIVER

A

C

B

5

4

3

2

1

A. LED
B. Coding button
C. Field strength indicator

i

ESC

RES

PARTY·ECO

MENU

+

–

OK

3

4 5

6721

Receiver

Transmitter

1

To check that the coding is active or has
been successful, go back into the coding
mode for the transmitter (menu > service
> coding), when you press OK the LED A
will light up briefly to confirm that the recei­ver is now paired with the transmitter.

To check that the receiver is picking up a
signal from the transmitter, enter into the
menu: Menu > Service > Test HF.

A test signal will be sent for a period of 15­minutes from the transmitter to the receiver
every 5-seconds. In turn, at least one signal
strength indicator LED should light up; the
strength of signal is indicated by the quantity
of LED’s that are illuminated.

Place the transmitter in a room or location
that enables optimum signalling.
To cancel the signal strength test, press
ESC at any time.

Should it be necessary to cancel or reset the
current coding/pairing of the receiver with a
respective transmitter, press button B for

10-seconds. The LED will illuminate for 3­seconds before going out.

The transmitter (RFT) is powered by 2 x AA
batteries and these should last approximate­ly 1.5-years.

The transmitter can be wall-mounted or can
left on a desktop or table-top using the free­standing support (supplied).

Remove the battery compartment cover and
insert 2 x AA batteries within 10-minutes to
ensure any memorised program or setting is
maintained.

The transmitter (RFT) and receiver (OTR)
have been coded and paired with each other
during the final production test at the factory.
However if either of the components have
been reset or is a replacement unit it will be
necessary to code and pair the RFT with the
OTR (see section 2.0)

Hinged cover

Display of the day of week

(1 = Monday, 2 = Tuesday etc.)

Multifunctional display, e.g.

“Room temperature 20.0˚C”

Display PARTY- or

ECO program active

Display for batteries to be replaced

Display of the switch phases

RESET button

Icon bar for display of the
programming level (rotary switch
position MENU)

Change buttons

+/–

Rotary switch for program selection

Button OK (confirmation of setting/
selection or programming)

Button ESC (cancellation of pro­gramming entries)

Info button for checking the set­tings

Battery compartement
To open, pull towards the front

Symbol appears during a radio
transmission

2.1 SIGNAL STRENGTH TEST

2.2 CODING RESET

3.0 TRANSMITTER OVERVIEW AND SETUP

3.1 INSERTING/REPLACING BATERIES

3.2 INITIAL SETUP

2

Once the batteries have been inserted into
the battery compartment and the OTR has
been connected to the boiler, the transmitter
can be mounted/located and programmed
for use.

The RFT can be mounted on any wall within
the dwelling or can be table/desk located
using the stand provided.

To ensure optimum performance, it’s prefe­rable to carry out a signal strength test (sec­tion 2.1) before deciding on a final location.
Ideally, for wall mounted applications, the
unit should be positioned 1.5-metres from
the floor level.

Avoid areas such as near or above firepla­ces, televisions, windows, or radiators that
provide artificial room temperature conditi­ons.

For wall-mounting applications, detach the
back-plate from the RFT by inserting a small
flat bladed screwdriver on the bottom under­side of the unit.

Use a combination of suitable mounting
holes on the back-plate to secure the back-

plate to the wall at a height of 1.5-metres
from the floor.

Once the unit is powered via the batteries,
the display is active and the default settings
are enabled.

PROGRAMMING PROCEDURE

Rotate the program selector to the MENU
position, using the  buttons you can
scroll through the main menu:

• TARGET TEMP

• SERVICE

• HOLIDAY

• PROGRAM P3

• CLOCK/DATE

3.4.1 TARGET TEMP MENU

Using the programming procedure, scroll
through the main menu until TARGET TEMP
is displayed; press the OK button to select
the sub menu:

• COMFORT – temperature required when

the heating is ON

• LOWER – temperature required when the

heating is OFF

• FROST – setting level when the program

selector is in the frost protection mode or
the HOLIDAY function has been enabled

Use the  buttons to select the desired
temperature/s and press OK to confirm or
ESC to cancel any changes.

3.4.2 SERVICE MENU

Using the programming procedure, scroll
through the main menu until SERVICE is
displayed; press the OK button to select the
sub menu; use the  buttons to select the
desired function:

• HW IMMEDIATE

• CODING

• TEST RF

• CONTROL

• WALL COMP

• OPTIMISATION

• DISPLAY

• HOT WATER

• LANGUAGE

3.3 MOUNTING/LOCATION

3.4 MENUS AND SUB-MENUS

Wall mounting

Free-standing

3