Viessmann VITOTROL 100 OT Operating instructions

VITOTROL 100 OT
Room Temperature Controller
Operating Instructions for the System User
OpenTherm Room Temperature Controller with Digital Time Switch
For Vitodens 100-W & Vitodens 111-W

2Contents
Contents
General Information
Control Unit Function Modes
Controls
Summary of Controls & Indicators
Control and Display Elements
Symbols on Display
Controls
Default Display
Commissioning
Heating System Operation Mode
Time Program or Operating Mode
Selecting the Time Program or Operating Mode
Preset Time Programs
Constant Operating Modes
Changing the Selected Time Programs and Set Temperatures
Changing Existing Time Phases
Creating New Time Phases
Deleting Time Program
Central Heating
Selecting the Operating Mode
Temporarily Changing the Set Room Temperature
Comfort Mode
Reduced Mode
Permanently Changing the Room Temperature
Changing the Heating Curve for Weather-Compensated Operation
Selecting a Heating Curve
Changing Room Temperature for a Few Days (Holiday Mode)
Stopping or Interrupting Holiday Mode
DHW Heating
Selecting the Time Program and DHW Temperature
Temporarily Changing the DHW Temperature
Further Adjustments & Possible Problems
Time and Date
Summertime/Wintertime
Further Settings
Setting the Language
Changing the Default Display
Setting the Contrast
Locking out the Controls (Key Lock)
Temporarily Interrupting or Unlocking Key Lock
Changing the Display Format of Fault Messages
Returning All Settings to Their Delivered Condition
Possible Problems
Carrying Out a Reset
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3General Information
General Information
Control Unit Function Modes
Your heating contractor set the function during commissioning.
Two function modes are possible:
• Room temperature-dependent operation: If no outside temperature sensor and no heating circuit
with mixer is connected, function mode "ROOM CONTROL" must be selected.
• Weather-compensated operation: If an outside temperature and a heating circuit mixer are
connected, function mode "OT CONTROL" must be selected.
The settings you can make vary depending on the function mode selected.
Note: DHW Heating is active continuously or in accordance with the set switching times, regardless
of the function mode set.
Note: You will have to select the function mode again following a reset.

4Controls
Controls
Summary of Controls & Indicators
Controls and Display Elements
Symbols on Display
These symbols are not always displayed, but
appear subject to operating conditions.
Controls
Default Display
When idle, the screen always shows the room
temperature, time and (subject to settings)
selected time phases as the default display.
Press INFO to access control mode.
Information on Operation
You can perform most setting and selection
procedures using the +/- keys or the rotary
selector.
The following only describes how to control the
device using the keys

5Commissioning
Commissioning
Heating System Operating Mode
Depending on the installation and settings, your heating system is either room temperature-dependent
or weather-compensated in conjunction with an outside temperature sensor.
• In room temperature dependent mode, the set room temperature is controlled via the flow
temperature
• In weather-compensated mode with room inuence, the set room temperature is controlled via
the selected heating curve and room influence factor. The room influence factor can be set by
your local heating contractor.
• In weather-compensated mode without room inuence, the room temperature is controlled via
thermostatic valves. At temperature levels Comfort 1 to 3and Party, the flow temperature is
controlled according to the selected heating curve. In reduced mode (setback mode and eco
mode), the flow temperature is reduced by a parallel shift of the heating curve. The setting of the
heating curve and height of the parallel shift can be changed by your heating contractor.
Note: In weather-compensated mode without room influence, choosing temperature levels Comfort
1to 3or Party does not result in different room temperatures.
Time Program or Operating Mode
You can choose between 3 preset time programs (P1 to P3) or select a permanent operating mode.
You can change the switching times of the programs individually. See page 7
For each time phase, you can choose between the following preselected set room temperatures
(temperature level):
• "COMFORT 1"
• "COMFORT 2"
• "COMFORT 3"
• "REDUCED TEMP"
• "FROST PROTECTION"
See page 7 for how to permanently change the set room temperatures.
Note: If your room temperature controller acts on 2 heating circuits, the set time program affects
both heating circuits.
Selecting the Time Program or Operating Mode
Press the following keys:
1. Press INFO
2. Press MODE
3. Select the required time program with <--/-->
In the delivered condition, time program P1 is set
4. Press OK to conrm

6Commissioning
Preset Time Programs
Time Program P1
Central heating in accordance with the
following time program:
Monday to Friday
• 06:00 to 22:00:
Central heating with standard room
temperature (Comfort 1)
• 22:00 to 06:00:
Central heating with reduced room
temperature
Saturday and Sunday
• 07:00 to 23:00:
Central heating with standard room
temperature (Comfort 1)
• 23:00 to 07:00:
Central heating with reduced room
temperature
Time Program P2
Central heating in accordance with the following
time program:
Monday to Friday
• 06:00 to 08:00 and 16:00 to 22:00
Central heating with standard room
temperature (Comfort 1)
• 08:00 to 16:00 and 22:00 to 06:00:
Central heating with reduced room
temperature
Saturday and Sunday
• 07:00 to 23:00:
Central heating with standard room
temperature (Comfort 1)
• 23:00 to 07:00:
Central heating with reduced room
temperature
Time Program P3
Central heating in accordance with the
following time program:
Monday to Friday
• 12:00 to 20:00:
Central heating with standard room
temperature (Comfort 1)
• 20:00 to 12:00:
Central heating with reduced room
temperature
Saturday and Sunday
• 07:00 to 22:00:
Central heating with standard room
temperature (Comfort 1)
• 22:00 to 07:00:
Central heating with reduced room
temperature
Constant Operating Modes
You can set the following operating modes:
• "PERM COMFORT": Continuous operation with standard room temperature
• "PERM REDUCED": Continuous operation with reduced room temperature
• "FROST PROTECTION": Frost protection mode:
• For room temperature-dependent operation: At room temperatures below 6˚C
• For weather-compensated operation: At outside temperatures below 3˚C
Changing the Selected Time Programs and Set Temperatures
You can set the following days and groups of days:
• Entire week (1 to 7)
• Monday to Friday (1 to 5)
• Saturday and Sunday (6 and 7)
• Individual days (1, 2, 3, ... 7)

7Commissioning
Changing Existing Time Phases
Press the following keys:
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. Select "PROGRAMMING" with <--/-->
6. OK to conrm
7. Select the required program with <--/-->
8. OK to conrm
9. EDIT, "CHANGE" appears
10.OK to conrm, to change the switching time.
Days flash
<--/--> for "CLEAR" and OK, to delete the
switching time
11. +/- for the required group of days or single
day
12. OK to conrm
13. +/- for the required temperature level (e.g.
Comfort 1)
14. OK to conrm
15. +/- for hour (start time)
16. OK to conrm
17. +/- for minute (start time)
18. OK to conrm
19. OK to change further switching times
ESC to exit programming
Creating New Time Phases
Press the following keys:
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. Select "PROGRAMMING" with <--/-->
6. OK to conrm
7. Select the required program with <--/-->
8. OK to conrm
9. NEW
Days flash
10.+/- for the required group of days or single
day
11. OK to conrm
12. +/- for the required temperature level (e.g.
Comfort 1)
14. OK to conrm
15. +/- for hour (start time)
16. OK to conrm
17. +/- for minute (start time)
18. OK to conrm
19. OK to change further switching times
ESC to exit programming
Calling up Switching Times
Press the following keys:
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. Select "PROGRAMMING" with <--/-->
6. OK to conrm
7. Select the required program with <--/-->
8. OK to conrm
9. Press NEXT to call up the set switching
times one after another
10.ESC to exit programming
Deleting the Time Program
Press the following keys:
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. Select "PROGRAMMING" with <--/-->
6. OK to conrm
7. Select the required program with <--/-->
"CLEAR P..."
8. OK to conrm
9. Select "CLEAR PROG" with <--/-->
10.OK to conrm
Conrm appears
11. OK to conrm
12. ESC to exit programming

8Central Heating
Central Heating
Selecting the Operating Mode
You can choose between the following time programs and operating modes:
• "P 1" to "P 3"
Alternating operation with standard and reduced room temperature according to the set
switching times.
• "PERM COMFORT"
Continuous comfort mode
• "PERM REDUCED"
Continuous reduced mode
• "FROST PROTECTION"
Continuous frost protection mode
See page 5 for how to select the operating mode.
Temporarily Changing the Set Room Temperature
You can change the room temperature for a short time, regardless of the selected operating
program. The change remains in force until the next operating program changeover.
1. Press INFO to access control mode
2. Room temperature-dependent mode or weather-compensated mode with room influence:
Use the rotary selector to set the required increase or decrease in the set room temperature in ˚C
Weather-compensated mode without room influence:
Use the rotary selector to set a value from -5 to +5 for the required increase or decrease in the
flow temperature. Value 1 means increasing or decreasing the flow temperature by 5˚C. This
temporarily changes the room temperature.
Comfort Mode
In comfort mode, the room temperature is regulated to a preselected set value (delivered condition:
23˚C). You can change the preselected set value.
The setting remains in force until the next operating program changeover.
1. Press INFO to access control mode
2. Press PA RTY. The selected room temperature appears
3. Use the rotary selector to set the required increase or reduction of the set room temperature.
PARTY is displayed
Ending Comfort Mode
1. Press PA RTY. "PARTY OFF" appears
2. Press OK to end comfort mode

9Central Heating
Reduced Mode
In reduced mode, the room temperature is regulated to a preselected set value (delivered condition
17˚C). You can change the preselected set value. The setting remains in force until the next
operating program changeover.
1. Press INFO to access control mode
2. Press ECO. The selected room temperature appears
3. Use the rotary selector to set the required increase or reduction of the set room temperature
Ending Reduced Mode Early
Press ECO. "ECO OFF" appears
Press OK to end reduced mode
Permanently Changing the Room Temperature
You can permanently change the following preselected set room temperatures:
• "COMFORT 1" (delivered condition 21˚C)
• "COMFORT 2" (delivered condition 22˚C)
• "COMFORT 3" (delivered condition 23˚C)
• "REDUCED TEMP" (delivered condition 17˚C)
• "FROST PROTECTION (delivered condition 6˚C)
Choose the preselected room temperature for the time phases in the time programs, for example.
Press the following keys:
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. Select "TARGET TEMP" with <--/-->
6. OK to conrm
"COMFORT 3" is displayed and the value
flashes
7. Use +/- to change or press OK to move to
next setting (e.g. "COMFORT 1")
8. OK to conrm
The next setting appears
9. Change with +/- or press ESC to exit
programming

10 Central Heating
Changing the Heating Curve for Weather-Compensated Operation
In weather-compensated operation, the room temperature is controlled according to a preset
heating curve.
If your room temperature controller acts on 2 heating circuits, a heating curve is preset for each
heating circuit.
The heating curves show the relationship between the outside temperature and the boiler water
temperature or flow temperature. The lower the outside temperature, the higher the boiler water or
flow temperature. The heating curve is limited upwards by the maximum set flow temperature. The
maximum set flow temperature can only be changed by your heating contractor
The line shows the curve for the standard room temperature. The delivered condition is shown.
The heating curve is changed with "LOW END" , "END POINT" and "SHIFT" which influences the
room temperature.
Shifting the heating curve means reducing the flow temperature for reduced mode. The value
"SHIFT" acts on both heating circuits.

11Central Heating
Changing the Heating Characteristics to Change the Room Temperature
Heating Characteristics Measure
The living space is too cold during
the heating season
Set the "END POINT" to a higher
value (e.g. 80˚C)
The living space is too hot during
the heating season
Set the "END POINT" to a lower
value (e.g. 70˚C)
The living space is too cold during
Spring/Autumn and during the
heating season
Set the "END POINT" and "LOW
END" to a higher value (low end e.g.
30˚C; end point e.g. 80˚C)
The living space is too hot during
Spring/Autumn and during the
heating season
Set the "END POINT" and "LOW
END" to a lower value (low end e.g.
20˚C; end point e.g. 70˚C)
The living space is too cold during
Spring/Autumn
Set the "LOW END" to a higher value
(e.g. 30˚C)
The living space is too hot during
Spring/Autumn, but warm enough
during the heating season
Set the "LOW END" to a lower value
(e.g. 20˚C)
The living space is too cold in
reduced mode
Set the "SHIFT" to a lower value
(e.g. 20˚C)
The living space is too hot in
reduced mode
Set the "SHIFT" to a higher value
(e.g. 30˚C)
Setting a Heating Curve
Press the following keys:
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. Select "CONTROL" with <--/-->
6. OK to conrm
7. Use <--/--> to select "OT CONTROL"
8. Use <--/--> to select the required setting:
"LOW END" for heating circuit without mixer
"LOW END 2" for heating circuit with mixer
"END POINT" for heating circuit without mixer
"END POINT 2" for heating circuit with mixer
"SHIFT" for heating circuit without mixer
"SHIFT 2" for heating circuit with mixer
9. OK to conrm
10.Use +/- or rotary selector to change the
setting
11. OK to conrm
12. ESC to exit the settings

12 Central Heating
Changing the Room Temperature for a Few Days (Holiday Mode)
The holiday program starts on the set leaving day and ends on the set return day. The set time
program is then active again.
9. Change with +/-
10.OK to conrm
The day flashes
11. Set the day and hour in the same way, and
press OK to conrm.
END HOLIDAY appears
12. Set END HOLIDAY the same way
13. "FROST PROTECTION" appears.
Set the required set temperature
14. OK to conrm
Press the following keys:
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. Select "Holiday" with <--/-->
6. OK to conrm
START HOLIDAY appears briefly, then the
year flashes
7. Change with +/-
8. OK to conrm
The month flashes
Stopping or Interrupting the Holiday Program
Stopping the Holiday Program
1. Press OFF
"HOLIDAY OFF" appears
2. OK to conrm
The holiday program is interrupted
Reactivating the Holiday Program
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. Select "HOLIDAY" with <--/-->
6. OK to conrm
"REACTIVATE" appears
7. OK to conrm
HOLIDAY appears

13DHW Heating
DHW Heating
Setting the Time Program and DHW Temperature
You can set time phases for DHW heating:
• The DHW cylinder is heated during the set time phases when using a boiler with a DHW cylinder
connected to it.
• If using a boiler with an integral instantaneous water heater, the DHW is kept at the set
temperature during the set time phases.
10.+/- for the required group of days or single
day
11. OK to conrm.
12. +/- for the required set DHW temperature
13. OK to conrm
14. +/- for hour
15. OK to conrm
16. +/- for minute
17. OK to conrm
18. OK to set further switching times
ESC to exit programming
Press the following keys:
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. Select "Programming" with <--/-->
6. OK to conrm
7. Select "HOT WATER" with <--/-->
8. OK to conrm
9. NEW
Days flash
Changing or Deleting Switching Times
See page 7
Temporarily Changing the DHW Temperature
You can change the DHW temperature for one hour.
1. Press INFO repeatedly until "HW SETPOINT TEMP" appears
2. Select the required set DHW temperature with the rotary selector

14 Further Adjustments & Possible Problems
Time and Date
Press the following keys:
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. OK to conrm
6. Select "TIME/DATE" with <--/-->
7. Press +/- to make the required setting
8. OK to conrm and move to next setting
9. ESC to exit programming
Summertime/Wintertime
Press the following keys:
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. Select "TIME/DATE" with <--/-->
6. Press OK repeatedly until "SU/WI RULE"
appears
7. Press <--/--> to select the required setting
8. OK to conrm and move to next setting
9. ESC to exit programming
Further Settings
You can make further settings under "OPTIONS"
Press the following keys:
1. Press INFO
2. Press MODE
3. Select "SETTINGS" with <--/-->
4. OK to conrm
5. Select "OPTIONS" with <--/-->
6. OK to conrm
7. Press <--/--> to select the required setting
See the following chapters
8. ESC to exit programming
Setting the Language
1. Conrm "LANGUAGE" with OK
2. <--/--> for the required language
3. OK to conrm
Changing the Default Display
1. Conrm "DISPLAY" with OK
2. +/- for the required display version (see below)
3. OK to conrm
Display Version 1 Display Version 2 Display Version 3
Setting the Contrast
You can change the display contrast in stages.
1. Conrm "CONTRAST" with OK
2. Use +/- for the required value (0 to 15)
3. OK to conrm
Further Adjustments & Possible Problems

15Further Adjustments & Possible Problems
Locking out Controls (Key Lock)
You can lock out the controls by switching on key lock.
1. Conrm "KEY LOCK" with OK
2. Use +/- to select "WITH KEY LOCK" or "NO KEY LOCK"
3. OK to conrm
The display then shows only "KEY LOCK" and a key symbol
Temporarily Interrupting or Unlocking Key Lock
Press and hold INFO for longer than 3 seconds.
You can temporarily operate the device or unlock the key lock. See above.
Changing the Display Format of Fault Messages
1. Press OK to conrm the "ERROR FORMAT"
2. Use +/- to select "HEXADECIMAL"
Do not adjust "DECIMAL"
3. OK to conrm
Returning All Settings to Their Delivered Condition
All settings made after commissioning will be lost.
1. Conrm "FACTORY SET" with OK
"CONFIRM" appears
2. OK to conrm
System Characteristics Cause Remedy
Rooms are too cold The room temperature is set
incorrectly
Check the settings and correct if
required:
• Program (see pages 6 - 7)
• Room Temperature (see pages
8 - 9)
• Time (see page 14)
Rooms are too hot The room temperature is set
incorrectly
Check the settings and correct if
required:
• Program (see pages 6 - 7)
• Room Temperature (see pages
8 - 9)
• Time (see page 14)
Possible Problems
Carrying Out a Reset
Press the reset button with a suitable instrument.