Eberle Instat 868-r1 Installation And Operating Instrictions

Installation and

Operating Instructions

INSTAT 868-r1

Radio Thermostat

U  468 931 002 934

1 Application

The electronic INSTAT 868-rt room temperature con-

troller (radio transmitter) may be used as:

●

an individual room temperature controller,

see Fig. 1 or

●

a zone controller for dwellings and offices, see

Figs. 2, 3 (in conjunction with the INSTAT 868 RF-

clock thermostat)

It is designed to provide control for

●

oil and gas hot-water heating systems

●

actuators for radiator heating

●

electric floor or direct heating

●

circulating pumps, see Fig. 4, etc.

An INSTAT 868-a1, INSTAT 868-a4 or INSTAT 868-a6

(1-, 4- 6-channel) radio receiver is required for opera-

tion.

2 Features

●

No controller wiring-up required

●

Very simple operation by means of adjustment knob

●

Temperature setback (by radio) via INSTAT 868-r

clock thermostat possible

●

Zone control by radio possible

●

Suitable for radio-controlled pump logic

●

Mode selector switch for

– permanent comfort temperature

– permanent setback temperature

– permanent Off

– automatic mode (time control by means of

INSTAT 868-r master controller, with 2 setback

values)

●

variant without mode selector switch

●

variant for heating or cooling (2-pipe systems)

●

energy-saving/timer/party mode for switching on

the heating system for a limited period of time

●

valve/pump protection (is activated every day for a

short period of time)

●

a transmitter can control any number of receivers

●

self-learning address setting

●

transmitter suitable for all INSTAT 868-a1, -a4, -a6

(1-, 4-, 6-channel) receivers

●

power supply via 2 commercially available batteries

●

Housing: pure white in the new EBERLE 2000

design

3 Function description

The  INSTAT 868-r1 room temperature controller de-

tects an actuating signal independently of a variable

set temperature. This signal is transferred to a radio re-

ceiver by radio data transmission (INSTAT868-a1, -a4,

-a6). The final control elements for heating and cooling

applications are switched by means of this receiver

(230 V). There are plans to use the transmitting fre-

quency used all over Europe for that type of application.

The transmitting power is very low. It is far below the

power of a mobile telephone. Moreover, the trans-

mitter is activated only every 10 min.

The transmission quality is enhanced by employing

special test procedures and repeating transmissions.

Transmitter and receiver are tuned to each other by

making use of the “learning mode”.

3.1 Control mode

The controller supports two control modes which can

be selected via jumper BR 3.

Fuzzy mode with PWM:

This mode is very similar to a continuous-action con-

trol. It is particularly suitable for electrothermal actua-

tors, electric heaters and pumps.

The controlled variable calculated from the difference

between set and actual temperature is displayed as a

variable pulse-pause-ratio (pulse width modulation

=PWM).

The sum of pulse and pause times is constant and

equals 10 min. In the case of larger temperature dif-

ferentials, the controller switches permanently on or

off, e.g. in the case of a temperature setback.

The control algorithm used attempts to keep the room

temperature constant without taking account of the

switching differential. For that purpose it is necessary

that heat be called (however, to a lesser extent) even

if the set temperature has already been reached.

ON-OFF mode:

The heating system works at 100 % capacity until the

set temperature is reached. Above this temperature,

the heating system is switched off.

This mode is used where frequent switching is to be

avoided, say, in the case of burner control or if a rise

in temperature above or a fall in temperature below a

predetermined limit is to be signalled.

3.2 Mode selector switch  ( 

è ê ë í

)

The following modes of operation can be set by

means of this switch:

è

Automatic mode

ê

Permanent comfort temperature

ë

Permanent setback temperature

í

OFF

Thermostats, which are not equipped with a mode

selector switch, always control in accordance with

the ambient temperature set.

è

è

Automatic mode (master / slave):

In this mode, the INSTAT 868-r1 acts as a slave. The

INSTAT 868-r clock thermostat acts as the master.

This is equivalent to zone control.

The room temperature is modified depending on the

time of the day. The switching times are preset by the

INSTAT 868-r1 radio thermostat with the following 

3 different temperature steps:

v

1 Comfort

u

2 Standard (comfort temperature reduced by 2 K)

t

3 Setback (comfort temperature reduced by 4 K).

For details see receiver instruction.

Notes:

●

This function is working only if the “master/slave”

mode is active on the receiver.

●

If receiver is not operating in “master/slave” mode,

comfort temperature is used.

●

In case of losing slave, receiver is operating in

alarm mode.

●

In case of losing  master,  comfort temperature is

used.

●

The earlier heating start  has to be noticed (due to

master self learning heating curve)

ê

ê

Permanent comfort temperature:

The comfort temperature selected on the adjustment

knob is maintained permanently. 

ë

ë

Permanent setback temperature:

The temperature selected on the adjustment knob is

permanently reduced. 

There is no change in the time setting.

The setback value (-2 K, -4 K) can be selected in the

thermostat by means of jumper BR 2.

í

í

OFF:

There is no control action. The radio transmission to

the receiver, however, remains active.

Function 3.4 ... timer ... is possible

Note:

If the batteries are removed for more than one hour,

the receiver changes to alarm mode, the heating sys-

tem operates at 30 % capacity.

3.3 Changeover from heating to cooling

(and vice versa)

(Available only with special variants)

The switch for changeover is located under the flap.

Thus, the controller can be switched from summer to

winter mode (and vice versa).

The energy-saving steps “standard” and “setback”

exceed the comfort temperature by +2 K or +4 K

respectively in the cooling mode.

U

Heating: as temperature rises, energy con-

sumption is reduced

P

Cooling: as temperature rises, energy con-

sumption is increased

Note:

If the master/slave mode is used, the master must

also be switched to heating/cooling.

3.4 Energy-saving/timer/party mode

For activating the comfort temperature for a limited

period of time.

The switch-on time can be selected freely from 1 up

to 15 hours (in one-hour steps).

After this period of time has elapsed, the controller

switches again to the state selected on the mode se-

lector switch (

è

,

Ñ

or 

í

).

è

è

Automatic mode (= party function):

The comfort temperature is activated for the duration

of the timer operating time.

ê

ê

Comfort mode

The timer has no effect (no flashing of the indicator

lamp)

ë

ë

Setback temperature (= energy-saving mode):

The timer causes switching between comfort temper-

ature and selected set back temperature.

í

í

OFF (energy-saving mode)

Timer causes switching between comfort-tempera-

ture and “off”.

Activating the timer:

●

Every time the 

ì

-button is pressed, the timer oper-

ating time is increased by one hour.

Pressing once = 1 hour, pressing twice = 2 hours ...

Pressing 15 times = 15 hours,

pressing 16 times = 15 hours

Each time the push-button is pressed, the indicator

lamp will light up briefly. If it is pressed more than 

15 times, the time setting will remain unchanged at 15

hours. The lamp will no longer light up.

The button should be pressed in rapid succession.

If not pressed for more than approx. 15 sec. setting

will start again at one hour.

Termination:

●

pressing the reset button or

●

the timer is switched off when the position of the

mode selector switch is changed.

3.5 Valve protection

This function prevents valve sticking e. g. during sum-

mer time (inclusion of particles). This protective func-

tion is activated every day for approx. 3 min. It is re-

peated every 24 hours, calculated from the last use of

the reset button.

This function can be switched off by means of jumper

BR 1, e. g. in the case of electric heating systems.

3.6 Function of indicator lamp

The following functions are indicated by means of this

lamp:

Learning mode

is lit during the learning mode

Timer activation short flash when pressing the

push-button

Battery weak

short flash every 15 sec.

After reset

short flash

(sign of proper functioning)

3.7 Jumper function

3.8 Battery change

If the indicator lamp lights up briefly every 15 sec., the

batteries must be changed within the next few days

(under the hinged lid).

Observe correct polarity.

Please use the type of battery specified under section

6. “Technical data”. The quality of the battery deter-

mines its life.

Following a replacement of batteries, the controller

will continue to operate in its previously selected func-

tion.

If the timer is operating it will be cancelled.

4 Installation

The temperature sensor can be arranged within the

room where it is considered best by the user. How-

ever, for perfect temperature control it is reasonable

to arrange the sensor at a position which:

– is easily accessible for operation

– is free from curtains, cupboards, shelves etc.

– enables free air circulation

– is free from direct sun radiation

– is free from draughts (e.g. opening of windows and

doors)

– is not affected directly by the source of heat

– is not located on an external wall

– is located approx. 1,5 m above floor level

– permits safe radio transmission

– is not in the vicinity of e. g. a radio receiver, a televi-

sion set or a radio transmitter

– is not in the vicinity of metal parts e. g. metal

doors, metal cupboards, mirrors or steelrein-

forced concrete 

– if unsure, check radio transmission before installa-

tion (see receiver instructions, section “Radio

range test”), look for suitable position if necessary.

Installation is to be carried out in the following se-

quence:

●

remove temperature adjustment knob

●

loosen retaining screw

●

remove housing top

Note:

Discharge static charge of human body before touching

electronic equipment for repositioning jumpers, e. g. by

briefly touching heat or water pipes.

Jumper

Closed

Open

BR 1

Valve protection ON

Valve protection OFF

BR 2

Temperature setback 4 K

Temperature setback 2 K

BR 3

Fuzzy

on/off action

1 Application

2 Features

3 Function description

3.1 Control mode

3.2 Mode selector switch

3.3 Heating / Cooling changeover

3.4 Energy-saving/timer/party mode

3.5 Valve protection

3.6 Function of indicator lamp

3.7 Jumper function

3.8 Battery change

4 Installation

5 Commissioning

5.1 Performance testing

6 Technical data

7 Short form operating instructions

8 Application examples

9 Dimensions

Set temperature

Temperature

Off

On

In the case of inexplicable malfunctions, the reset

button should be pressed.

Temperature-dependent pulse-

pause-ratio characteristic

100%

Permanent on

Temperature

Pulse-pause-ratio

Set temperature

Controlled 

variable

%

Permanent off

Output 

variable