First ELTHERM AT8 User manual

ELTHERM AT8ELTHERM AT8
Programmable room thermostat
ELTHERM AT8
User's manual
Installation and maintenance instructions
FIRŠT ROTOTEHNIKA
Radegunda 54,
SI-3330 MOZIRJE, SLOVENIJA
PM7-0242-22.AT8-ang
PE VELENJE
Koroška cesta 56a, SI-3320 VELENJE
tel. 03 / 898 35 00, fax. 03 / 898 35 35
e-mail:[email protected]
12
PROG. HEATING LEVEL
(HIGHER ) / (LOWER) H M DAY(S)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
YOUR PROGRAM SCHEDULES
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ELTHERM AT8ELTHERM AT8
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DEAR CUSTOMER
Congratulations
You have bought a programmable room thermostat, manufactured according to the
latest quality and safety standards. It is made according to the state of art and efficiently.
We are convinced that the use of our product will satisfy your needs to.
Thanks for your confidence
FIRŠT
THE SET CONSIST OF:
- Programmable room thermostat
- Two wall screws with inlet-piece for fixing the thermostat on the wall
- Instruction for use
In case any of above specified elements are missing or are defective require your dealer
to replace it.
Read the instructions carefully in order to be able to make use of all advantages of the
product.
! WARNING!
All examples listed in the instructions are merely indicative. The manufacturer accepts
no responsibility for incorrect hydraulic connection of machine part of installations should
comply with all safety regulations defined by law and the rules.
We reserve the right to modify the instructions and the technical data of the product
without prior notice.
GENERAL
ELTHERM AT8 is programmable room thermostat with temperature display. It has pos-
sibility to set two temperature levels between 5°C and 30°C:
- lower or economic temperature level ,
- higher or comfort temperature level , ;
On the display is shown the correct time and temperature level. With the slide switch
(page 5) is possible to choose way of operation:
- protection against freezing
- non-stop working on lower - economic temperature
- non-stop working on higher - comfort temperature
- automatic working according set program
11
EXAMPLES FOR USE
Example of control the rotary actuator Example of leading the gas boiler
Example of regulation of low temperature boiler
with domestic hot water treatment with room
thermostat and electric operated diverter valve
EMV 110..710s or ROTODIVERT
District heating control for hot water heating with
electric motor ball valve and room thermostat
ELTHERM AT8
MV 120/210
ELTHERM AT8
ELTHERM
AT8 EMV 110/710
RELE
BOILER
THERMOSTAT
ELTHERM AT8
EMV 110/701
EMV 110/820
Technical data
Supply voltage: .............................. 3 x 1.5V, LR6 (Expired time of batteries is approximately 2 years)
Output: ........................................... relay SPDT
Relay rating: ................................... 5(2)A, 250VAC
Hysteresis of thermostat: .............. ± 0.5K
Montage: ........................................ bottom part of thermostat on the wall, upper part with notches
Connection: .................................... 3 wire (3 x 0.75 mm2)
Ambient temperature: .................... 0°C - 50°C
Adjustable temperature range: ...... 5°C - 30°C
Housing: ......................................... plastic material
Protection degree: ......................... IP 20
Dimensions: .................................... 80x150x42mm (high x width x depth)
Weight ............................................ 0.25 kg
BOILER
THERMOSTAT

ELTHERM AT8ELTHERM AT8
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MONTAGE OF THERMOSTAT
Set the room thermostat on the wall with help of added screws
and model hools, which are drew on inside of packing cardboard.
It must be set 1.5m up from floor.
You must be careful where you montage the thermostat! Thermo-
stat should be placed on neutral place in the room, that means
that distance must be between thermostat and all heating bodies
(radiators, fireplace, ...), airing openings (window, door,...) and
chimneys at least 1m. Be careful on direct influence of the sun!
In case of incorrect montage, the room sensor will not perceive
correct room temperature, and will because of temperature influ-
ence come to differences, which will have for consequence to
high or in most cases to low actual temperature in the room.
Gas boilers, stove, kitchen-range or chimney also warm up the
wall. So you must be careful on these elements when you fixing
the thermostat on the wall. The thermostat must have at least 1m
distance from these elements!
Examples of incorrect montage
room thermostat room thermostat
gas
chimney
room thermostat
chimney
room thermostat
gas
boiler
Digital programmable timer makes possible to set heating regime for each day or group
of days. 20 program switches are available. The minimum setting of switching time is 1
minute. Digital programmable timer enables temporarily manual override of program
for switching between lower ( ,) and higher ( ,) temperature level. This manual
switching is active until next program switch.
Programmable room thermostat can be used for heating and cooling application with
suitable electrical connection.
Programmable room thermostat can control directly rotary actuator for mixing valve,
electric motor ball valve, circulation pump, burner, …
10
PROBLEM: SOLUTION
Days are flashing, pressing any key does
nothing except " " key turns output on
lower or higher temperature level.
Time of Day and Day of Week have not
been set. See “SETTING THE TIME”
Time of day was set while holding the
" " key down, but days are still flashing.
Current day of week was not set while
holding down the key. See “SETTING
THE TIME”
It is 10.00 and a program switch for
higher temperature level " " at 8.00
was entered, but the output is on lower
level state " ". Display shows the
" " and " " symbols.
After programming, the timer does not
“look back” to determine if it should be
on higher temperature level. Press the
" " key (temporary override) to turn the
output on higher level; " and "
appears in display. The timer will
assume automatic operation at the next
programmed event.
A program for 8AM Monday thru Friday
was entered, but it will not accept it and
" " is flasing,
The higher ( )/ lower ( ) level
switch was not entered as part of the
program.
" " or " " must be selected.
At turning both knobs for setting
temperature you not hear switches of
relays
- slide switch is in position " "
- batteries are exploitated
Display is beginning to fade or relay is not
switching
- batteries are exploitated. Expired time
of batteries is approximately 2 years
PROG. HEATING LEVEL
(HIGHER ) / (LOWER) H M DAY(S)
1 (Higher) 06 00 Monday – Friday
2 (Lower) 22 00 Monday – Friday
3 (Higher) 07 00 Saturday, Sunday
4 (Lower) 23 00 Saturday, Sunday
FACTORY SETTINGS
Program switch 1: heating on higher level at 06:00 Monday thru Friday
Program switch 2: heating on lower level at 22:00 Monday thru Friday
Program switch 3: heating on higher level at 07:00 Saturday and Sunday
Program switch 4: heating on lower level at 23:00 Saturday and Sunday
Four programs switches need to be entered.
TROUBLESHOOTING
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ELTHERM AT8ELTHERM AT8
4
POSSIBILITIES OF ELECTRICAL CONNECTION
Connection of electromotor ball valve EMV..110 or rotary actuator MV 120/..
Connection of burner or pump
Connection of cooling device
Connection of compressor or heating pump
ELECTRICAL CONNECTION
Unscrew the housing of connection cords and place the bottom of the thermostat on the
wall. Conduct of power supply connects on the middle con-
nection cord (2). Signal for open-
ing is on connection cord (1). Sig-
nal for closing is on connection
cord (3). Use wire 3x0.75m2.
Screw the housing back to his
place! (Housing serves as protec-
tion against high voltage and at
the same time separate low volt-
age part from high voltage).
9
DAY KEY SELECTION
REVIEWING PROGRAM SWITCHES
To review the programs at any time, press “Prog.” key. Programs switches will appear
in the order they were entered with repeated presses of the “Prog.” key. After all pro-
grams have been reviewed, the blank display (--.--) will appear to allow entering another
program. Another press of the "Prog." key will display the number of free program
switches available, such as "Fr 16" if 4 program switches have been entered.
MANUAL OVERRIDE
TEMPORARY: While is selector switch in position " ", pressing the " " key once
will reverse the output; higher level to lower level or lover to higher level. The symbol
"" appears in the display to indicate a temporary override. At the next scheduled
switching time, automatic control resumes, eliminating the override.
CHANGING A PROGRAM SWITCH
Select the program switch to be changed with the “Prog.” key. A new set of days may be
selected with the “Day” key just as in initial programming. Hour and minute can be changed
with the “h” and “m” keys.
Press “Prog.” to proceed to next program switch or " " key to store the new program.
DELETING A PROGRAM SWITCH
To delete only one or a few programs: press “Prog.” key until the desired program
switch is displayed.
Press “m” key to 59 and press once more to blank out (--).
Press “h” key to 23 and press once more to blank out (--).
Press " " key, display will flash for several seconds and then enter the Run Mode.
Using the “RESET” key will delete ALL programs, the time of day, and day of the week
and program is set to factory settings.
PRESS »DAY« KEY DISPLAY
SHOWS
DAYS
0 times 1 2 3 4 5 6 7 Every day
1 time 1 2 3 4 5 6 Monday-Saturday
2 times 1 2 3 4 5 Monday-Friday
3 times 6 7 Saturday and Sunday
4 times 1 Monday
5 times 2 Tuesday
6 times 3 Wednesday
7 times 4 Thursday
8 times 5 Friday
9 times 6 Saturday
10 times 7 Sunday

ELTHERM AT8ELTHERM AT8
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DESCRIPTION OF CONTROL PANEL
Slide switch for choosing the way of operating
Four ways of operating are available:
Protection against freezing (8°C)
Non-stop working on lower (economic) temperature
Non-stop working on higher (comfort) temperature
Automatic working according set program
With key < > (8) is possible temporary switch of working after program. This function
switches the program from lower - economic ( ,) to higher - comfort ( ,) tempera-
ture operation or reverse, and it's active until next switch in program.
That switching between lower - economic to higher - comfort temperature operation is
working after set program, the slide switch (3) must be in position “ ”!
LEGENDA :
1 LCD display for exact time and state of
program
2 LCD display for room temperature
3 Slide switch for choosing way of operating
4 Knob for setting higher (comfort)
temperature ( , )
5 Knob for setting lower (economic)
temperature ( , )
6 - key for setting minutes
7 - key for setting hours
8 key for the temporarily manual
override of program
9 key for setting the day of the week
10 reset key - erasing of all settings
11 key for switching in summer time and back
12 key for input the program
13 key for setting the exact time
8
PROGRAMMING SETTING
It is helpful to write out the program schedules before beginning. See last page !
IMPORTANT: The current time of day and day of week must be set prior to programming.
See "setting the time"
Example:
Program switch 1:
heating on higher level at 7:00 Monday thru Saturday
Program switch 2:
heating on lower level at 17:00 Monday thru Friday
Program switch 3:
heating on lower level at 19:00 Saturday
Three programs switches need to be entered. For program setting press "Prog." key
only once. Display shows factory settings:
Program switch 1 (higher level at 7:00 Monday thru Saturday)
Press " " key until symbol appears
Press "h" key to 07
Press "m" key to 00
Press "day" key to 1 2 3 4 5 6 is displayed
Press "Prog." key to enter to next program switch
Program switch 2 (lower level at 17:00 Monday thru Friday)
Press " " key until symbol appears
Press "h" key to 17
Press "m" key to 00
Press "day" key to 1 2 3 4 5 is displayed
Press "Prog." key to enter to next program switch
Program switch 3 (lower level at 19:00 Saturday)
Press " " key until symbol appears
Press "h" key to 19
Press "m" key to 00
Press "day" key until only 6 is displayed
Press "Prog." key to enter to next program switch
Program switch 4 is factory set. So you have to delete it.
Press “m” key to :59 and press once more to blank out or
press “h” key to 23 and press once more to blank out
Press " " key display will flash for several sconds (--) and
then enter Run Mode (--)
IMPORTANT:
Timer is in the same state (temperature level), which was before program setting. New
program will be reflected on the next program switch (timer does not “look back” to
determine if it should be on higher or lower level after programming). If state of timer is
not accord to program then manually temporary override it with key “ “. At the next
scheduled switching time, automatic control resumes, eliminating the override.

ELTHERM AT8ELTHERM AT8
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REPLACING OF BATTERIES
Replacing of batteries is recommended before every beginning of the heating sea-
son. That's how you assure reliability of working of thermostat!
With screwdriver you separate room thermostat from support on the wall with pushing
the screwdriver into notch on bottom part of thermostat, lift
it with hand and take it off. In room thermostat are placed
three alkali batteries LR06 1.5V. In upper part is placed
one battery for weekly timer and thermometer. You must
put the new battery in the empty spot and then pull out the
used one.
In lower part there are two batteries for the
electronics of thermostat relay. You must
replace both batteries at time.
Because of batteries working of thermo-
stat is not depending of power supply (in
case of falling out the power supply the program is saved
in thermostat). Expired time of batteries is approximately 2
years, exploitation of batteries can be noticed when dis-
play in beginning to fade or relay is not switching.
AFTER REPLACING THE BATTERIES, TURN BOTH KNOBS (for higher and lower tem-
perature) TO EXTREME RIGHT AND EXTREME LEFT AND TURN THEM IN ORIGINAL
POSITION. Turning of knobs is necessary for correct placing the exit of thermostat,
without erasing the set program from memory. Always use alkaline batteries LR06,
others can leak out and damage the electrical connections.
Temperature settings
Programmable room thermostat has possibility to set two temperature levels between
5°C and 30°C:
- Higher or comfort temperature level ( ,) with knob nr. 4
- Lower or economic temperature level ( ,) with knob nr. 5
Settings of lower and higher temperature are independent of each other.
ELEMENTS OF LCD DISPLAY
LCD incorporates a number of different elements to display various data and information.
Run mode symbol
Higher ( ,) /lower
( , ) temperature level
Manual override of
temperature level
operation
Day of the week
Daylight time symbol
Time of the day or
switching time
7
SETTING THE TIME
NOTE: If the “h” and “m” keys are held down longer than 2 seconds, the numbers will
advance rapidly.
Press and hold the key " " during the following:
1. Press “h” to advance to the current hour (while holding down " " the key)
2. Press “m” to advance to the current minute (while holding down " " the key)
3. Press “Day” repeatedly to advance to current day (while holding down " " the key)
NOTE: If the days are flashing, it indicates the day of the week was not set when setting
the time. The timer cannot be programmed unless days of the week is entered.
MANUAL DAYLIGHT TIME CHANGEOVER
Each year, in the spring, press "±h" to advance the time an hour. In the fall, press "±h" to
set back an hour.
PROGRAM SETTINGS
The programmable weekly timer will accept up to 20 programs switches.
For every program switch is necessary to set
1. Heating level: lower ( ,) or higher ( ,) temperature level
2. Time of day (Hour and Minutes)
3. Single day or multiple days
A program is required for each higher-level event ( ,), and a program is required for
each lower-level event ( ,).
NOTE: MULTIPLE EVENTS MAY BE PROGRAMMED.
For example,
Program switch 1 may turn the office heating on higher level at 08.00 Mon.-Fri.
Program 2 may turn the heating on lower level at 17.00 Mon.-Fri.
If someone is working late, they may press the override key " " to turn the office heating
on higher level. If they forget to press the override key " " again when they leave, the
heating will stay on higher level all night or all weekend.
To prevent this from occurring, additional program switches may be programmed.
- Program 3 can turn the heating on lower level at 18.00.
- Program 4 can turn the heating on lower level at 19.00.
- Program 5 can turn the heating on lower level at 20.00., etc.
IMPORTANT:
Before proceeding with setting the time and programming the unit, press the
“RESET” key to clear all data from the memory.