Hoffmann HRT-177RS Bedienungsanleitung

WIRELESS - manual issue 02/2013 rev. 03

HRT-177RS

WIRELESS RF WEEKLY ROOM THERMOSTAT

Installation and user instruction……………page 2

CRONOTERMOSTATO SETTIMANALE SENZA FILI

Manuale di installazione e uso………….…pag. 11

!EN!.!

THESE INSTRUCTIONS ARE TO BE RETAINED BY THE USER

Thank you for choosing this radio frequency (RF) radiostat.

This central heating control device is easy to fit, and with

correct use, will deliver improved comfort levels in your home

whilst saving you money.

This thermostat is designed to be used only with heating

controls system with a maximum switching load of 2A at

30VDC or 0,25A at 230VAC.

If installing for someone else, please ensure that the

instructions are handed to the householder.

WARNING:Please read this manual prior to installation or use.

SHOCK HAZARD:This unit must be installed by a competent

person, in accordance with BS 7671 (the IEE Wiring

Regulations), or other relevant national regulations and codes

of good practice. Always isolate the AC Mains supply before

installing this unit.

FIRST INSTALLATION WARNING.

The product arrives with most of the parameters!factory set

with minimal actions required by the installer: wiring

connections of the receiver to the boiler, setting the time and

setting the day. All the rest, like coupling between receiver and

transmitter, heating pattern, default temperatures, etc. are

already pre-configured at the factory.

IMPORTANT:these instructions should be read in conjunction

with the appliance installation instructions. It is recommended

that this device is installed by a qualified electrician.

ENCODER KNOB:Encoder movements: clockwise and

anticlockwise rotation, push to select.

Encoder clockwise and anticlockwise rotation: increase or

decrease the room comfort temperature, auto enter of the

selected value after 5 seconds.

Encoder rotation one step: check the selected comfort

temperature. The value will blink for few times and later it will

be back to the room temperature value display.

Press and hold the encoder once to activate or de-activate

the ADVANCE function

Press and hold the encoder longer for enter in menu and

select the status mode or set the

time/programming/parameters (see specific paragraph).

LCD DISPLAY

DISPLAY

ENCODER

SENSOR

OPENING

!EN!.!

SYMBOL

DESCRIPTION/FUNCTION

Heating mode is active (winter mode)

STATUS MODE

AUTO: the thermostat uses the

programmed heating pattern (default or

user defined) to switch the heating ON &

OFF at preselected times.

OFF: the thermostat is set to have the

heating constantly OFF (in this mode the

default or user defined heating pattern is

ignored) – summer mode.

PARTY: the thermostat is set to provide

heating constantly ON (in this mode the

default or user defined heating pattern is

ignored). This status stay ON up to end

user switching OFF

ADVANCE: the pre-programmed heating

pattern is advanced to the next ON (or

OFF) period (this function can only be used

when the clock is in the AUTO mode)

Used to show current day of week

Used to show current time of day or

explanation inside the main menu

24-hour clock in 60 minute segments. Side

example: The heating fascia is OFF up to

15:59 and it is ON from 16:00 to 18:59

Used to show current room temperature or

desired temperature to be selected.

Batteries low

Heat request to the boiler (central heating

ON)

other icons inside the main menu

SYMBOL

DESCRIPTION/FUNCTION

Economy temperature selection

Technical menu selection (only for

expertise)

Escape from main menu

QUICK START GUIDE

To be read and used after a proper installation has been made

and after the hours and the working mode has been set.

WORKING MODE:This central heating control device provides

you both the room thermostat function and the weekly clock

function. When in AUTO mode, the central heating will be

ON/OFF according to the programmed times and according to

the set comfort temperature (the ON command is identified by

the flame icon). When the heating will be commanded ON the

set-point in the room will be the comfort one. In case of off

programmed times, the set temperature is the “economy

temperature”, selectable inside the main menu (16°C is the

default value). When in OFF mode the heating requested will

be switched on when the room temperature drops under the

frost protection value (default is 5°C); this value can be

modified inside the technical menu. When in PARTY mode the

heating request is permanently on according the selected

comfort temperature that can be modified any time rotating the

encoder and pressing to confirm.

ENCODER

The encoder has three functions: selection of the set

temperature, set the ADVANCE function and setting the

thermostat. If the status mode of the thermostat is OFF, only

the pressing functionality is active; any rotation done does not

generate any modification.

!EN!.!

1. Rotate to select the desired temperature and press to enter.

2. Press once to activate or deactivate the ADVANCE function.

Use to “advance” the heating to an ON or OFF period

3. Press for 3 seconds to enter menu. Rotate to scroll through

the menu choosing between status mode, economy

temperature setting, time of day, day of the week,

programmed times day by day, technical menu (PL) and

exit. Press again to modify selected item.

Status mode: rotate to change the thermostat mode

between AUTO, PARTY, and OFF, press to save. The

press from status mode automatically escapes from menu.

Economy temperature ECOt: Rotate to select the desired

economy temperature and press to enter. This temperature

is used when programming time is OFF in AUTO status

mode.

Time of the day:rotate to change the hours, press to save.

Move to minutes; rotate to change minutes, press to save.

Day of the week: rotate to change the day, press to save

Programmed times day 1-7: rotate clockwise to set hour

ON, rotate anticlockwise to select hour OFF. Clockwise and

anticlockwise rotation move ahead the time. Press to save.

Rotate clockwise to move to the following day. It is possible

to program together days 1…5 and days 6-7 with the same

pattern in a single operation.

PL: rotate to select the password value, press to enter

inside the technical menu. Rotate to select the parameters:

01 = calibration of the temperature sensor, 02 = frost

protection temperature selection, 03 = hysteresis OFF value

selection, 04 = hysteresis ON value selection, 05 =

encoding and coupling with the RF receiver, 06 = radio

frequency value selection, EHIt = escape from technical

menu. (for technical menu see dedicated paragraph).

Exit: escape from main menu.

INSTALLATION AND OPERATING INSTRUCTIONS

Unlike the conventional thermostat, this control separates the

function in two units. The receiver serves for wiring

connections and heat on/off control. The transmitter serves as

the user interface and for temperature sensing/control. The

two units are linked by radio frequency (RF). The RF

communication is only in one direction from the transmitter to

the receiver, therefore the transmitter does not receive any

feedback from the receiver, no alarm of missing

communication is visible on the transmitter display.

THE TRANSMITTER is a wall-mounted

timer-thermostat. The transmitter can be

located wherever a conventional room

thermostat would normally be sited. No

wiring is required, as the transmitter is

battery powered.

THE RECEIVER is connected to the boiler,

and can replace a conventional

mechanical or electronic time clock. The

receiver arrives pre-cabled and ready to

be fixed, therefore it is not necessity to

open the receiver casing. The receiver is

equipped with a transparent bubble

button that incorporates the button

function, the green led function and the

red led function.

Button functions:

1. Press once: manually switch ON the heating (relay closed),

press again to switch OFF.

2. Press for 5 seconds: encoding procedure start up. After

success coupling there is an automatically exit from the

procedure.

!EN!.!

Receiver led: colors and functionality

LED

FUNCTIONS

REASON

Led green ON

constantly

Relay closed =

heating request ON

Signal received

from the transmitter

or end user manual

button pressing

Led red ON

constantly

Relay open =

heating request

OFF

Signal received

from the transmitter

or end user manual

button pressing

Led green and

led red

blinking

alternatively

Encoding procedure

working

The receiver button

has been pressed

more than 5

seconds in order to

start the encoding

procedure.

Led green

blinking

irregularly

Lost communication

with the transmitter

– heating is ON

(relay closed)

Low batteries on the

transmitter or

transmitter too far

from the receiver.

Led red

blinking

irregularly

Lost communication

with the transmitter

– heating is OFF

(relay open)

Low batteries on

the transmitter or

transmitter too far

from the receiver.

NOTE 1FOR RECEIVER:when the receiver is manually moved to

the ON or OFF relay position (heating request ON or OFF),

after few seconds the relay position will move according the

transmitter request. If it is required for a permanent ON or OFF

position, please use the transmitter functionality.

NOTE 2FOR RECEIVER: in case of missing radio communication

(see errors paragraph), the receiver relay moves automatically

to the ON position whatever the transmitter request was (led

green irregularly blinking). However it is possible manually

move the relay position (the heat request) to the OFF or ON

position permanently by pressing the receiver transparent

button. The selected position is indicated by the red or green

light irregularly blinking. Once the radio communication has

been reactivated the receiver will revert to work according the

transmitter requests.

PACKING LIST QTY

•RF receiver with 4 wire cable fitted 1

•RF transmitter 1

•Screws and wall plugs (drill 5 mm) 4

•Adhesive magnetic 3

•Double side adhesive 2

•Instructions 1

•Batteries 1,5 AAA 2

BOILER PREPARATION:Isolate the appliance from the electrical

supply and remove the appliance casing and PCB cover (refer

to boiler installation instructions for specific details).

The receiver can be provided with or without a male plug

according the product code ordered and according the

availability of female counterpart on the boiler side. The

version without male plug is supplied

with spade terminals.

Receiver with male plug fitted

Connect the male plug (4 pins) of the

receiver to the female plug on the boiler

(pre-wired on specific boiler models)

Receiver with spade terminals

Connect the spade terminals from the

receiver to the PCB terminals (room

thermostat terminal black & black, main

supply terminals blue and brown on the

main boiler supply socket) - figure

below for a sample boiler connections.

Blue = main supply 230 Vac = neutral N

!EN!.!

Brown = main supply 230 Vac = line L

Black & Black = room thermostat = I-O

See above picture for the receiver internal connections.

IMPORTANT:the link-wire (if fitted) must be removed from room

thermostat terminals

IMPORTANT:Secure the receiver wiring harness to the internal

boiler cable anchors.

INSTALLATION OF RECEIVER

Secure the receiver in the proximity of the boiler using the

screws and wall plugs or using the adhesive magnetic strips

on the external boiler casing including to fix (both fixing tools

are provided).

The location should be chosen in order to see the receiver

light/button. For no reason should the receiver box be opened.

The appliance can only be mounted indoors and in areas free

from any water or moisture. Wiring must conform to IEE

regulations. RF Address Code Setting, if there is another user

nearby, e.g. in the next dwelling, you receiver may be operated

in error by their transmitter. You may select a different RF

address code to prevent this. (see encoding section).

NOTE: do not fix the receiver in a permanent way to the boiler

casing.

INSTALLATION OF TRANSMITTER

The receiver and the transmitter are delivered already coupled

therefore the encoding procedure is not necessary at the

installation. In case it is required to encode the transmitter and

the receiver, this operation should be done while the receiver

and the transmitter are still very near (see the encoding

instructions).

Before fixing the transmitter check that the radio signal is

active (if there is no communication the receiver will blink red

or green irregularly.

Because the transmitter uses radio waves to communicate

with the receiver, you should also bear in mind that metallic

objects can weaken or deflect radio signals: this includes steel

reinforced walls, filing cabinets, kitchen appliances, mirrors,

etc. The range of the Radiostat is 40 metres in open air, and

20 metres inside buildings, dependent on RF obstructions as

mentioned above.

Position the Radiostat on a wall surface away from

obstructions and direct heat sources or draughts, in a room

that is warmed by the heating system. The fixing of the

transmitter can be done either with screws and wall plugs or

with the double side adhesive depending on the wall surface

quality (both supplied). See the side diagram as reference to

drill the wall. Distance between 2 holes is 60 mm, drill hole dia.

5 mm.

In the case of using wall plugs,

the transmitter box must be

open to fix the screws to the

wall plugs from inside the box.

The opening of the transmitter

must be done pressing gently

the lower button and leverage

on the upper side. Fit the

supplied two batteries inside

the transmitter with the

direction as indicated

!EN!.!

internally.

WARNING!Do not touch the printed circuit board of the

transmitter as it contains electrostatically sensitive

components.

FUNCTIONS

The weekly wireless RF room thermostat has the following

functions:

•Room thermostat: the internal temperature sensor detects

the temperature and, comparing with the set point, switches

ON or OFF the heating request (according the programmed

timings). The temperature sensor is located on the lower

side of the item.

•Time: on the display it is possible to set and read the time

(weekly hours display mode)

•Programming timing: it is possible to select the desired ON

or OFF heating times. The programming is possible during

one week 24-hours and the minimum time segment is one

hour.

•Status mode: AUTO, PARTY, OFF: Select AUTO mode if

timed ON/OFF period are required. Select PARTY mode for

constant ON (24-hours). Select OFF mode for heating OFF

(summer mode). Note: summer/winter selection is better to

be selected on the main boiler dashboard.

•ADVANCE functions: the pre-programmed heating pattern

is advanced to the next ON (or OFF) period

•3 level temperatures: comfort, economy and frost protection

•Frost protection functionality

•Battery low

•Alarm of missing radio frequency communication on the

receiver.

•Room temperature calibration

•Automatic boiler switch ON for radio communication errors

(missing communication between receiver and transmitter).

OPERATING INSTRUCTIONS

At the first installation the thermostat, the time and the day of

the week needs to be set (see encoder paragraph). After this,

a desired thermostat status must be selected (see the encoder

paragraph). When in AUTO mode the heating request follows

the programmed heating pattern and the desired room

temperature selected.

When in PARTY mode the heating request is ON all the time

according the desired room temperature selected.

When in OFF mode, the heating request is OFF all the time

(frost protection is ON).

The thermostat is pre-programmed with a default heating

pattern (see table below); however this can be modified to suit

individual needs (see encoder paragraph).

PRE-PROGRAMMED HEATING PATTERN

Day

OFF

Monday (day 1)

06:00

08:00

04:00

10:00

Tuesday (day 2)

06:00

08:00

04:00

10:00

Wednesday (day 3)

06:00

08:00

04:00

10:00

Thursday (day 4)

06:00

08:00

04:00

10:00

Friday (day 5)

06:00

08:00

04:00

10:00

Saturday (day 6)

08:00

11:00

04:00

11:00

Sunday (day 7)

08:00

11:00

04:00

11:00

Other factory set values are:

•Comfort temperature: 21°C

•Economy temperature: 16°C

•Frost protection temperature: 5°C

•Hysteresis OFF: 0,4°C (boiler switch OFF at 0,4°C above

the target)

•Hysteresis ON: 0,2°C (boiler switch ON at 0,2°C below the

target)

!EN!.!

LOW BATTERIES

The two supplied batteries will last for approximately 1 year

under a normal usage. When the batteries are low, the relative

icon will appear on the display. It is better to change the

batteries on time in order avoid any lack of heating supply

during the day.

Follow the correct positioning of the batteries according to the

internal transmitter battery box indications.

Every time the batteries are removed the transmitter loses only

the time. The programmed times, the set temperatures and

the transmitter coupling code are maintained memorized.

ERRORS

•In the case of missing communication between the receiver

and the transmitter, the red or green led on the receiver

starts to blink irregularly, after 350 sec of the communication

being lost.

•The above error can happen either when the battery power

on the transmitter is low (battery icon ON on the transmitter

display) and when the location of the transmitter is not

suitable (too far a distance or internal home disturbs like a

concrete wall or electronic interference etc.).

•Once the communication has returned, the transmitter

automatically returns to a normal working mode.

•In the case of missing communication, the receiver will

automatically switch on the heating requested to the boiler

(the boiler switching on will depend on the summer/winter

position on the boiler dashboard, not from the thermostat

request). This will prevent freezing in case of missing

communication between the receiver and the transmitter in

winter position.

•If the receiver is located at the limit of wireless maximum

distance, the receiver can lose the communication for a

while and then back to normal working mode.

•In the case of missing supply to the receiver (electrical black

out), the communication will be lost but at the return of the

electricity, the receiver will automatically return to a

standard working mode according to the transmitter signal.

There is no requirement for any special operation on the

receiver/transmitter in the case of missing communication

unless it is necessary to change location of the transmitter.

•This product has one-direction radio frequency from the

transmitter to the receiver, this means that only the receiver

can recognize the missing communication. No advise will be

displayed on the transmitter in the case of missing

communication.

TECHNICAL MENU AND SPECIAL FUNCTIONS

(ONLY FOR EXPERTISE)

The weekly thermostat incorporates a technical parameterized

menu accessible only with a password and the use of this is

recommended for expert personnel only.

The parameter settings change the working mode of the

thermostat, therefore the modifications are allowed only if

required by the particular installation.

The technical menu is accessible by the main menu under the

PL icon (see encoder paragraph for the access procedure).

The password to be selected is the number 53.

Inside the PL menu are present 6 parameters that can be

adjusted as described below:

!EN!.!

PAR.

DESCRIPTION

CALIBRATION It is possible to calibrate the

transmitter temperature sensor by entering the 01

parameter. On the display will appear only the

temperature. Use the encoder to increase or

decrease the temperature. Press the encoder to

enter the new value. From now the transmitter

uses the new value as current room temperature.

Please note that for the calibration it is necessary

to have a second thermometer that will be used as

master. This operation is suggested only if the

thermostat is fixed in a non-appropriate position,

therefore it is necessary to modify the value on the

display to be according the real room temperature.

FROST PROTECTION TEMPERATURE The weekly

room thermostat has an internal anti-frost function

that switches on the boiler (only when the boiler is

properly set to allow the room thermostat to

activate/deactivate the boiler, i.e. boiler in winter

mode) if the room temperature drops below the

selected temperature. This function is active all the

time whatever the programming time or the set

temperature. By entering the 02 parameter it is

possible to adjust the frost protection temperature:

the factory setting is 5°C, the 02 parameter can be

adjusted between 3°C and 10°C. the frost

protection selected temperature becomes the

minimum settable value for the economy

temperature (inside the main menu).

WARNING!This anti-frost protection is not intended

to be the main control to protect the entire heating

system and the boiler during a freezing period.

HYSTERESIS OFF The value selected with this

parameter indicates when the heat request is

stopped. The factory setting is 0,4°C, values range

between 0,0°C and 2,0°C. Heat requests switch

OFF when the room temperature reaches the

room target temperature plus the hysteresis OFF

value.

HYSTERESIS ON The value selected with this

parameter indicates when the heat request is

activated. The factory setting is 0,2°C, values

range between 0,0°C and 2,0°C. Heat requests

switch ON when the room temperature drop below

the room target temperature minus the hysteresis

ON value.

ENCODING The coupling between the receiver and

the transmitter is factory done, however if

necessary it is possible to make again the

coupling. Selecting the parameter the function

start, press the button on the receiver for 5

seconds, the green led start to blink regularly.

When the codification has been concluded (this

will take up to few minutes), the led stops to blink

and this will confirm the coupling done. On the

transmitter press the encoder to enter and escape.

RADIO FREQUENCY The product uses a radio

frequency value of 868MHz as required by the CE

regulation. In the case this value interferes with

other home appliances having the same, it is

possible to have a small modification of the radio

frequency. Default value is CH5 that correspond to

868.0MHz, the choices are between CH0 and

CH9. CH0 = 867.5MHz ….. CH9=868.4MHz. After

the selection of a new radio frequency value it is

necessary to proceed to a new encoding (see

encoding parameter 05)

WARNING!The modification of the radio frequency

must be a rare operation to do only if the errors in

are recognized to be not due to a long distance or

low batteries.

!EN!.!

10!

TECHNICAL SPECIFICATIONS

RECEIVER

Linked with transmitter via RF: frequency 868 MHz

Power rating: 230 VAC ±10%, 50 Hz

Power consumption: 1,2 W

Relay switching capacity:

−Min 1mA,

−Max 2A at 30 VDC

−Max 0,25A at 230 VAC

TRANSMITTER

Linked with receiver via RF: frequency 868 MHz

Power rating: 2 x 1,5AAA - Alkaline batteries

Temperature setting: 3°C to 35°C in 0.2°C increments.

Display temperature: -9,9°C to 50°C in 0.2°C increments.

Install transmitter and receiver in an environment with normal

pollution level.

Radio range 40 m in free space, (the range can be altered

depending on the installation conditions and on the

electromagnetic environment).

The manufacturer reserves the right to change specification

without prior notice - Consumers statutory rights are not

affected.

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