Como Open Therm User manual

Como OT
Open Therm Room
Temperature Controller
Installation and
Operating Manual
Please observe the safety instructions and
read through this manual carefully before
commissioning the equipment.
12:47

Safety information General information
2
General infor mation
Safety information
Power connection regulations
Please note the connection conditions specified by your
local electrical power supply company and the VDE
regulations.
Your heating control system may be installed and serviced
only by appropriately authorized specialists.
EIf the system is not installed properly, there is a risk of
fatal or severe personal injury.
Warranty conditions
If the system is not installed, commissioned, serviced and
repaired properly, it will render the manufacturer's warranty
null and void.
Important text
!Important information is highlighted with an
exclamation mark.
EThis attention symbol indicates dangerous situations.
Installation
Information on installation and starting the equipment up
as well as a connection diagram are provided in Part 3 of
this manual.
Description
Declaration of conformity
This device corresponds to the requirements of the
relevant guidelines and standards, if the corresponding
installation regulations and the manufacturer’s instructions
are complied with
Function
The controller enables setting and measuring values to be
entered and displayed for the heating system in the user's
living room. This means that the heating system can be
monitored and optimized constantly. Use of this controller
also enables the room temperature to be regulated and
displayed directly.
!The following information only applies when the
boiler type connected can send and receive the
necessary data on the BUS. Dotted lines, for
example, appear in the display for data which is not
available.

General information Description
3
General information 2
Safety information 2
Power connection regulations 2
Warranty conditions 2
Important text 2
Installation 2
Description 2
Declaration of conformity 2
Function 2
Part 1: Operation 4
Operation in normal mode 4
Mode selector switch 4
ECO key (heating time interruption) 5
Party key (heating time extension) 5
Modifying the set room temperature 6
Display in normal mode 6
Changing the settings 7
Overview of set value levels 8
Overview of user values 9
Overview of display messages 10
Enter time and weekday 11
Enter heating programs 12
Timer/heating program adjustment 12
Enter holiday program 14
Overview of expert values 15
Overview of code-protected valued 16
TSP - Transparent Slave Parameters 17
FHB - Fault History Buffer 17
Part 2: Explanations / Functions 18
Explanation of the set values 18
In the event of problems 20
Reset 20
Error display 20
General error list 21
Error 81 21
Other error numbers 21
Communication with the boiler " " 21
Unlocking the boiler 21
Pump runs / runs not => automatic
Pump switching 21
Part 3: Installation and Starting Up 22
Installation 22
Starting up 23
Communication OK? 23
Set language 23
Set time and weekday 23
Switching on the heating via telephone 24
Technical data 24

Operation in normal mode Part 1: Operation
4
Part 1: Operation
Operation in normal mode
(Hinged control panel cover closed)


Operating mode selector switch
ECO key (interruption of heating time)
Party key (heating time extension)
Modification of set room temperature
Mode selector switch
Press the key as often as necessary to set the operating
mode required. The selected operating mode is
represented by a symbol in the display. It takes effect
when the selected setting remains unchanged for 5 sec.
The following operating modes are available for selection:
iStandby / OFF
(heating and hot water preparation OFF,
only frost protection function active)
F1 Automatic mode
(heating according to time program 1)
F2 Automatic mode
(heating according to time program 2)
hDay mode
(24 hour heating at comfort temperature 1)
CNight mode
(24 h heating at economy temperature)
FSummer mode
(heating OFF, only hot water preparation active)

Part 1: Operation Operation in normal mode
5
ECO key (heating time interruption)
B
Displays (for approx. 3 sec.) the set interruption of the
heating time => Heating at economy temperature [ B]
Party key (heating time extension)
B
Displays (for approx. 3 sec.) the set extension of the
heating time => Heating at comfort temperature [ B]
Use to start setting/display / set duration of
heating time interruption
press => + 1 hour for each actuation
press => - 1 hour for each actuation
press 3 seconds:
Heating circuit switches to economy mode for the
rest of the day.
Display switches briefly to "ECO"
Use to start setting/display / set extension of
heating time
press => + 1 hour for each actuation
press => - 1 hour for each actuation
press 3 seconds:
Heating circuit heats until the next day.
Display switches briefly to "PARTY"
End the set Party or ECO function by pressing the Mode selector switch

Operation in normal mode Part 1: Operation
6
Modifying the set room temperature
In Normal mode, the heating system operates according to
the set room temperature (default, 20°C / 68°F).
Display in normal mode
!Due to inertia of the room temperature, deviations of
+/- 1°C / 2°F to the required room temperature are
normal. During transition from reduced operation
and heating operation, greater deviations are
possible at times.
Use the rotary knob to adjust the set room temperature by
±5°C / 9 °F. The nighttime temperature (economy
temperature) set on the controller is not affected.
Turn clockwise => Warmer (~1°C / 2°F per dot)
Turn counterclockwise => Colder (~1°C / 2°F per dot)
A Current time
B Set room temperature
(represented in degrees Celsius / Fahrenheit)
C Day (1=Monday, 2=Tuesday, ..., 7=Sunday)
(here, 3 = Wednesday)
D Bus symbol (if this symbol does not appear, check
the data cable to the boiler)
E Indicates the active heating program
(here: 6:00 to 9:00 and 14:00 to 23:00)
F Status indicator: Hburner ON; ZDheating
operation; ZFhot water preparation; frost pro-
tection active
G Mode selector switch
(here F1 => Heating according to time program 1)
H Mode indicator and current status
(here: BII => Heating with set room temperature 2)
I Display of the current room temperature

Part 1: Operation Changing the settings
7
Changing the settings
Changing the settings

ÄProgramming key
a) Select a value level
b) Select a value to be changed
c) Saving the new value
Plus key
(Search for or change value)
Minus key
(Search for or change value)
Operating and changing modes are accessed
directly by opening the control panel cover. =>
USER in the display
/Use the Plus/Minus keys to select the level in
which the value to be changed is located
=> Overview on the following pages
ÄPress the Prog key => Open / Select the level
/Use the Plus/Minus keys to locate the value
=> Overview on the following pages
ÄPress the Prog key => Select the value
Warning triangle appears in the display
=> Value can be changed
/Use the Plus/Minus keys to change the value
either => Do not save the value
òClose the control panel cover =>
ECaution! The changed value is not saved.
or => Save the value
ÄPress the Prog key => Value is saved
Warning triangle disappears from the display and
then
òClose the control panel cover
~

Part 1: Operation
8
~OPEN cover search for level using /
Overview of set value levels
•USER
Values are set by the user
•DISPLAY
Display temperatures in the system
•TIME-DATE
Set the time and weekday
•HTG-PROG 1
Set the 1st heating program (e.g. for working day)
•HTG-PROG 2
Set the 2nd heating program (e.g. for holiday)
•HOTW-PROG
Set the hot water program
•HOLIDAY
Set the start and duration of the holiday period
•EXPERT
Values should be set by a trained fitter
USER => See Page 9

DISPLAY => See Page 10

TIME-DATE => See Page 11

HTG-PROG 1 => See Page 13

HTG-PROG 2 => See Page 13

HOTW-PROG => See Page 13

HOLIDAY => See Page 14

EXPERT => See Page 15

Part 1: Operation
9
Overview of user values
USER

T-ROOM DES 1 5°C - 40°C => 20°C /
41°F -104°F => 68°F Value:

T-ROOM DES 2 5°C - 40°C => 20°C /
41°F -104°F => 68°F Value:

T-ROOM DES 3 5°C - 40°C => 20°C /
41°F -104°F => 68°F Value:

T-REDUCED 5°C -40°C => 10°C /
41°F -104°F => 34°F Value

T-ABSENCE 5°C -40°C => 15°C /
41°F -104°F => 59°F Value

T-DHW 1 10°C - 70°C => 50°C /
50°F -158°F => 122°F Value:

T-DHW 2/3
(
onl
y
with tank
)
10°C - 70°C => 50°C /
50°F -158°F => 122°F Value:

MAX T-HS 30°C-110°C => 85°C /
86°F -230°F => 185°F Value:

MAX T-FLOW
(
onl
y
with 2nd HC
)
30°C-110°C => 85°C /
86°F -230°F => 185°F Value:

MAX MODULATI 0-100 => 100% Value:

°C / °F °C - °F => °C Value:

RETURN
T-ROOM DES 1-3
Set room temperature for the 1.,2. or 3. heating period
T-REDUCED
Set room temperature for the night
T-ABSENCE
Set room temperature for the holiday period
T-DHW 1
Set hot water temperature for the first hot water period
T-DHW 2/3
Only for use in operation with an external hot water tank:
Set hot water temperature for the second hot water period
MAX T-HS
Maximum temperature of the boiler in heating operation:
Limitation for saving energy possible
MAX T-FLOW
Only with 2nd heating circuit: maximum flow temperature
of the mixing circuit (heating circuit 2 => protection)
MAX MODULATI
Maximum modulation factor of the boiler in heating
operation: Output limitation of the boiler for saving energy
°C / °F
Unit of the temperature

Part 1: Operation
10
T-OUTSIDE
(only with outdoor sensor connected [Terminals 5+6]) Display of the current outside
temperature [°C / °F] Ä=> Max. value with time; => Min value with time;
=> Max. value with time; Ä=> RETURN
T-ROOM DES
Display of the current room temperature [°C / °F]
Ä=> Current set temperature; => Min value with time; => Max value with time;
Ä=> RETURN
T-DHW
Display of the current hot water temperature [°C / °F] (only in hot water tank mode)
Ä=> Current set temperature; Ä=> RETURN
T-HS
Display of the current boiler temperature [°C / °F] Ä=> Current set temperature; Ä=>
RETURN
T-FLOW
Only with 2nd heating circuit: Displays the current flow temperature of the 2nd heating cir-
cuit [°C / °F] Ä=> calculated value; Ä=> RETURN
MODULATION
Display of the current boiler output [%]; 00 = OF or value is not being sent
BURNER TIME
Display of the current burner operating hours [h] Ä=> Set value to ZERO; Ä=> RETURN
BURNER START
Display of the current burner start of the boiler [x] Ä=> Set value to ZERO; Ä=>
RETURN
WATER PRESS
Display of the current water pressure in the boiler (0.0 => value is not being sent)
RETURN Ä=>RETURN to main menu
Overview of display messages
DISPLAY

T-OUTSIDE

T-ROOM DES

T-DHW

T-HS

T-FLOW

MODULATION

BURNER TIME

BURNER START

WATER PRESS

RETURN

Part 1: Operation
11
Enter time and weekday
TIME-DATE
Time
WEDNESDAY
Operating and changing modes are accessed
directly by opening the control panel cover. =>
USER in the display
2x Plus key => " TIME-DATE "
ÄPress the Prog key => "Time" and "E"
/Use the Plus/Minus keys to change the value
Press and hold the key to scroll the value
From the minute 00, 15, 30 or 45 in steps of 15 minutes
ÄPress the Prog key => "Day" and "E"
/Use the Plus/Minus keys to change the value
ÄPress the Prog key => Save => " TIME-DATE "
~OPEN cover Ächange values with /
~

Part 1: Operation
12
Enter heating programs
F
2
D
D
I
F
2
B
D
I
Symbols:
I ON = First switch-on time (I OFF = first switch-off time)
20 °C/ 68°F = Set room temperature for displayed heating
time
Clock = Approximate program display [full hours]
D= Program for heating circuit 1
F2= Heating program 2, F1= Heating program 1
DI = Start time 1, IB= Stop time 1, DII = Start time 2,
IIB= Stop time 2, DIII = Start time 3, IIIB= Stop time 3
Timer/heating program adjustment
/Select weekday (Mo-Su) or block
(MO-FR => Monday-Friday, SA-SU => Saturday-Sunday,
MO-SU => Monday-Sunday)
ÄOpen weekday/block (see left)
=> "I ON 20°C/ 68°F " First switch-on time – set value I =
20°C/ 68°F
Set first switch-on time => for example 6:00 hrs
ÄConfirm first switch-on time
=> "I OFF 20°C/ 68°F " First switch-off time – set value I
= 20°C/ 68°F
Set first switch-off time => for example 8:00 hrs
ÄConfirm first switch-off time
=> "II ON 20°C/ 68°F " First switch-off time – set value II
= 20°C/ 68°F
// ÄSwitch-on and switch-off times 2 and 3 are en-
tered in the same way - please enter all values!
/Select another weekday/block for entry or exit heat-
ing program 2 with "RETURN" and set another program.
!The heating times are not saved until all the times
for a weekday/block have been entered.
"- - - -" for a switch-on/switch-off time => The relevant
heating timer is deactivated.
ION
IOFF

Part 1: Operation
13
Heating program 1
Factory setting:
Mo. to Fr.: 06:00 to 22.00
Sa. and Su.: 07:00 to 23:00
Heating time 1 Heating time 2 Heating time 3
Mo.
Tu.
We.
Th.
Fr.
Sa.
Su.
Heating program 2
Factory setting:
Mo. to Fr.: 06:00 to 08.00, 16:00 to 22:00
Sa. and So.: 07:00 to 23:00
Heating time 1 Heating time 2 Heating time 3
Mo.
Tu.
We.
Th.
Fr.
Sa.
Su.
Hot water
Factory setting:
Mo. to Fr.: 05:00 to 21.00
Sa. and So.: 06:00 to 22:00
Heating time 1 Heating time 2 Heating time 3
Mo.
Tu.
We.
Th.
Fr.
Sa.
Su.

Part 1: Operation
14
~OPEN cover Ächange value with /
Enter holiday program
For the holiday program, the following are entered in
days:
•the start of the holiday
•the duration of the holiday
HOLIDAY
StART-HOLID
HOLIDAY DUR
Operating and changing modes are accessed
directly by opening the control panel cover. =>
USER in the display
6x Plus key => Display:
"HOLIDAY" and "remaining days, e.g. 00"
ÄProg key => Display: "SART HOLID" and "E"
/Enter the number of days in which the holiday
starts.
The start is always assumed at 12:00 pm
! Please do not enter the day of travel as the start
date, but the first day of the holiday (no more
heating from this day)
ÄProg key => Display: „ HOLIDAY DUR “and „E“
/Enter the duration of the holiday in days
The end is always assumed at 12:00 pm
! Duration without days of travel. At days of travel you
should keep heating on
End the holiday programming function => " " Press Mode selector switch.
~

Part 1: Operation
15
Overview of expert values
For HEATSLOPE 2 = 0 and ROOM-INFL 2 = 0
=> Heating circuit 2 has not been active!
HEATSLOPE (see Pg.18)
(only with outdoor sensor connected [Terminals 5+6])
1 => for Heating circuit 1; 2 => for Heating circuit 2
ADAPTION = Heat slope adaptation (see Pg.18)
(only with outdoor sensor connected [Terminals 5+6])
Activation for automatic adjustment of the heat slope => Only
with weather-dependent control
ROOM-INFL = Room sensor influence (see Pg.19)
Sets the speed of the room temperature controller.
I-CONTROL = integrative part (e.g. 30 min)
If there is a deviation of the room temperature of 1 K for the
adjusted time period, the flow temperature is increased by the
value "room sensor influence". Usual value: "30 min".
HEAT UP OPTI = Warm-up optimization (see Pg.19)
Activate the function to automatically advance the start of the
heating time.
MAX OPT-TIME = Maximum time advance (see Pg.19)
Heating starts in advance maximally the amount of time set here.
N-OPTI-TIME = Required time advance (see Pg.19)
Heating will start in advance, today, the amount of time set
here.
T-ROOM ADJ = Room sensor adaptation (see Pg.19)
(only with outdoor sensor connected [Terminals 5+6])
Correction of the integrated room sensor's measured value –
adaptation at installation site (inside wall, outside wall)
OUT-TEMP-DEL = Outside temperature delay (see Pg.19)
In the case of well insulated walls -> Enter a high value
DISPLAY (1= display set room temperature)
ENGLISH Set the language used by the controller
(see Pg.23)
EXPERT

HEATSLOPE 0-3 => 1.2 Value:

ADAPTION 0/1 => 0 Value:

ROOM-INFL 1 ----, 0-20 => 0 Value:

I-CONTROL 0FF,03:00h-00:15h=>0FF Value:

HEAT UP OPTI 0/1 => 0 Value:

MAX OPT-TIME 0-3 => 2:00h Value:

N-OPTI-TIME Display only

T-ROOM ADJ (-5°C)-5°C => 0,0°C /
(23°F)-41°F => 32°F
Value:

OUT-TEMP-DEL 0-3 => 0:00h Value:

HEATSLOPE 2 0-3 => 0 Value:

ROOM-INFL 2 ----, 0-20 => 0 Value:

DISPLAY 0/1 => 0 Value:

ENGLISH =>GB Value:

Part 1: Operation
16
Overview of code-protected valued
20 => Entry of code no
Enter the correct code number to enable the following
values to be changed
21 => Code number
Reselect a code number
22 => Frost protection temperature (only with outdoor
sensor)
When the outside temperature has dropped below the set
limit value, the heating circuit is switched on and set to the
room temperature of 5°C / 41°F. The hot water
temperature is set to 10°C / 50°F. The boiler is heated to
the value "24 = minimum boiler temperature".
!The outside temperature delay takes effect here.
23 => Hot water short time heating (only with tank
operation)
When the function is activated, the hot water tank is heated
to 65°C / 149°F with every heat-up operation or at least
once a week on Saturdays at 1:00 a.m. to kill off any
bacteria.
24 => Minimum boiler temperature
Used to set a minimum boiler temperature for the heating
operation.
TSP and FHB => (See Pg. 17)
KS OT xxxx
The software number is displayed, and should be used as
a reference for any queries concerning the product.
RETURN Ä=>RETURN to main menu
EXPERT

........ Expert values (see Page15)

20 Enter code no. ----

21 Code No. 1234

22 Frost protection
temperature
(-5)-(+5) => 0°C /
(23)-(41) => 32°F

23 Hot-water short-
time heating
0/1 => 1

24 Min. boiler
temperature
10°C-80°C => 30°C /
50°F-176°F => 86°F

TSP Boiler parameters

FHB Fault history buffer

KS OT 8600 Software number

RETURN

Part 1: Operation
17
TSP - Transparent Slave Parameters
FHB - Fault History Buffer
Special boiler parameters [max. 20]:
Displays the number of TSP boiler parameters sent.
ÄProg key => Open the level and display the first
boiler parameter
/Scroll through the individual values in the level
A description of the values displayed and their significance
is provided in the boiler documents.
To change the values:
ÄSelect; /Change; ÄSave
Boiler fault history buffer:
ÄProg key => Open the level and display the first fault
entry (only when sent from the boiler)
/Scroll through the individual values in the level
ÄClose the level

Explanation of the set values Part 2: Explanations / Functions
18
0,2
0,4
0,6
0,8
1
1, 2
1, 5
2
20
40
60
80
10 0
2 0 16 12 8 4 0 - 4 - 8 - 12 - 16
Part 2: Explanations / Functions
Explanation of the set values
Heat slope: Relationship between outside temperature
and flow temperature (for floor heating approx. 0.6) =>
(only with outdoor sensor connected [Terminals 5+6])
Note on setting:
In the case of cold outside temperatures and too low room
temperature => Increase heat slope
In the case of high outside temperatures (e.g. 16°C / 61°F)
and too low room temperature => Correction via the set
room temperature value
The following graph provides a guideline to setting the heat
slope.
Boiler temperature
[°F] [°C]
212
176
140
104
68
[°C]
68 61 54 46 39 32 25 18 10 3 [°F]
Outside temperature
Heat slope adaptation: ON/OFF
Function for automatic adjustment of the heat slope =>
(only with outdoor sensor connected [Terminals 5+6])
The adaptation is only activated at outside temperatures
below 8 °C /46°F when the room temperature is below
18 °C / 64°F.
During the adaptation, warm-up of the living room begins
after 3 hours at reduced operation (nighttime). Room
temperature regulation is performed with a set value of
21 °C / 70°F. As soon as the room temperature exceeds
20 °C / 68°F, the room is regulated a further ½ hour at
20 °C / 68°F. The flow and outside temperatures are then
measured. The optimum gradient is determined from these
values and is then assumed in the regulation.
The calculation is made once following activation. The
smallest possible heat slope for radiator heating is set to
"1". Large surface heating (floors, walls, ceiling, ...) should
have heat slopes less than "1".
If the required room temperature has not been reached
during 4 hours of the adaptation, it is canceled (warning
indicator flashes). If the adaptation is canceled, it is
repeated on the next day.
Hot water preparation is blocked during the adapting.

Part 2: Explanations / Functions Explanation of the set values
19
Room sensor influence: The boiler temperature is
increased by the set value when the room temperature is
1K / 1,8°Ra below that required.
As a result, high values lead to fast regulation with high
fluctuations in the boiler temperature.
0: pure weather-dependent control with room temperature
dependent activation of the heating during the night
reduction.
----: Pure weather-dependent control
Warm-up optimization: Activate the function for the
automatic advance of the time set for starting heating.
Example:
Heating program 6:00 a.m. – 10:30 p.m.
OFF: Heating of the accommodation is set to begin at
6:00 a.m.
ON: Heating is actually started earlier, depending on the
weather and the current room temperature, so that the
accommodation has just reached the set room
temperature at 6:00 a.m.
Maximum time advance: This is the maximum time
heating can be started in advance.
Required time advance: This is the time the start of
heating has been advanced for today (display only).
Adaptation of room sensor: This value can reduce the
following disturbance variables for measuring the room
temperature:
- Production-related deviation of the sensor
- Influence of the temperature of the room wall
- Operating temperature
Outside temperature delay: In the case of extremely well
insulated walls, a change in the outside temperature
affects the room temperature after a correspondingly
longer delay. In the case of weather-dependent control,
this parameter can prevent a premature activation of the
heat generator.(only with outdoor sensor connected
[Terminals 5+6])
Displays: O entering a "1", the room temperature and set
room temperatures are displayed when the control panel
cover is closed.
Demand-dependent pump control : The pumps and
heating system are switched off if there is no heating
demand. The pumps are reactivated if frost protection is
triggered.
Switch off heating and pumps :
Room regulation: Room temperature > Set temperature
+ 1K
Regulation according to outside temperature: Outside
temperature > Set room temperature + 1K
Switch on:
Room temperature < Set room temperature
or Outside temperature < Set room temperature

In the event of problems Part 2: Explanations / Functions
20
In the event of problems
Reset
•Restart => Press Reset
•Load default settings => Press Reset + Prog
Error display
Reset
Press carefully using a pointed instrument (straightened
paper clip)
=> Restart the equipment.
ÄPress Prog key and Reset button simultaneously,
release Reset button and keep Prog key pressed until
"EEPROM" appears
=> All set values are reset to their default values (except
heating programs and hot water program).
Error numbers:
A: Error ID with the warning triangle
B: Error description through number or text
The table on the following page lists examples of some
errors. Since most errors are boiler related, please refer to
the relevant boiler documents.
!Also refer to the description of the boiler!
E:81
B
A
Lockout
B
A