VIESSMANN Vitodens 200, WB2 series Wall-Mounted, Gas-Fired Condensing Boiler Instruction Manual

VIESSMANN Vitodens 200, WB2 series Wall-Mounted, Gas-Fired Condensing

Boiler

Safety

Safety, Installation and Warranty Requirements

Please ensure that these instructions are read and understood before commencing installation. Failure to comply with the instructions listed below and details printed in this manual can cause product/property damage, severe personal injury, and/or loss of life. Ensure all requirements below are understood and fulfilled (including detailed information found in manual subsections).

• Product documentation
  Read all applicable documentation before commencing installation. Store documentation near boiler in a readily accessible location for reference in the future by service personnel.

• For a listing of applicable literature, please see section entitled “Important Regulatory and Safety Requirements”.

• Warranty
  Information contained in this and related product documentation must be read and followed. Failure to do so renders the warranty null and void.

• Licensed professional heating contractor
  The installation, adjustment, service and maintenance of this equipment must be performed by a licensed professional heating contractor.

• Please see section entitled “Important Regulatory and Installation Requirements”.

• Contaminated air
  Air contaminated by chemicals can cause by-products in the combustion process, which are poisonous to inhabitants and destructive to Viessmann equipment.

• For a listing of chemicals which
  cannot be stored in or near the boiler room, please see subsection entitled “Mechanical room” in the “Installation Instructions”.

• Advice to owner
  Once the installation work is complete, the heating contractor must familiarize the system operator/ultimate owner with all equipment, as well as safety precautions/requirements, shutdown procedure, and the need for professional service annually before the heating season begins.

WARNING

Installers must follow local regulations with respect to installation of carbon monoxide detectors. Follow the Viessmann maintenance schedule of the boiler contained in this manual.

• Carbon monoxide
  Improper installation, adjustment, service and/or maintenance can cause flue products to flow into living space. Flue products contain poisonous carbon monoxide gas. For information pertaining to the proper installation, adjustment, service and maintenance of this equipment toavoid formation of carbon monoxide, please see subsection entitled “Mechanical room” and “Venting requirements” in the “Installation Instructions”.

• Fresh air
  This equipment requires fresh air for safe operation and must be installed ensuring provisions for adequate combustion and ventilation air exist. For information pertaining to the fresh air requirements of this product, please see subsection entitled “Mechanical room” in the “Installation Instructions”.

• Equipment venting
  Never operate boiler without an installed venting system. An improper venting system can cause carbon monoxide poisoning. For information pertaining to venting and chimney requirements, please see section entitled “Venting Connection”. All products of combustion must be safely vented to the outdoors.

About these Instructions

Take note of all symbols and notations intended to draw attention to potential hazards or important product information. These include “WARNING”, “CAUTION”, and “IMPORTANT”. See below.

WARNING

Indicates an imminently hazardous situation which, if not avoided, could result in loss of life, serious injury or substantial product/property damage.

CAUTION

Indicates an imminently hazardous situation which, if not avoided, may result in minor injury or product/property damage.

IMPORTANT

• Warnings draw your attention to the presence of potential hazards or important product information.
• Cautions draw your attention to the presence of potential hazards or important product information.
• Helpful hints for installation, operation or maintenance which pertain to the product.
• This symbol indicates that additional, pertinent information is to be found.
• This symbol indicates that other instructions must be referenced.

For your Safety

Operation
Before operating the boiler, make sure you fully understand its method of operation. Your heating contractor should always perform the initial start-up and explain the system. Any warranty is null and void if these instructions are not followed.
Working on the equipment
All personnel working on the equipment or the heating system must have the proper qualifications and hold all necessary licenses. Ensure main power to equipment, heating system, and all external controls has been deactivated. Close main gas supply valve. Take precautions in all instances to avoid accidental activation of power during service work.
Maintenance and cleaning
Regular inspection and service by a qualified heating contractor is important to the performance of the Viessmann Vitodens 200 Series. Neglected maintenance impacts on warranty; regular inspection ensures clean, environmentally friendly and efficient operation. We recommend a maintenance contract with a qualified heating contractor.

Flue gas smell

• Deactivate heating equipment.
• Open windows and doors.
• Inform your heating contractor.
• Dangerous conditions
• Deactivate main power immediately.
• Close gas supply valve.
• Technical information
• Literature applicable to all aspects of the Vitodens 200:.
• Technical Data Manual
• Installation Instructions
• Service Instructions
• Operating Instructions and User’s Information Manual
• System Design Guidelines Additional applicable literature:
• Accessory manuals

Carbon monoxide
The U.S. Consumer Product Safety Commission strongly recommends the installation of carbon monoxide detectors in buildings in which gas-burning equipment is installed. Carbon monoxide (CO) is a colorless, odorless gas, which may be produced during incomplete combustion of fuel and/or when the flame does not receive an adequate supply of combustion air. Carbon monoxide can cause severe personal injury or loss of life. Therefore, carbon monoxide detectors that are in compliance with a nationally recognized standard (e.g. ANSI/UL 2034, CSA 6.19 latest edition) should be installed and maintained in buildings that contain gas-burning equipment.
Note: Viessmann does not test any detectors and makes no representation regarding any brand or type of detector.

For safe operation
We recommend that you frequently:

• Check for debris which could obstruct the flow of flue gases. The vent or chimney must not be blocked. A blocked or partially blocked vent or chimney can cause flue gases to leak into the structure.
  Flue gases leaking into the house can cause injury or loss of life. Blocked or partially blocked chimneys must have the blockage removed by a qualified heating contractor.

• Check pressure gage for correct system (water) pressure. Check for water on the floor from the discharge pipe of the pressure relief valve or any other pipe, pipe joint, valve or air vent.

• Check for moisture, water, or appearance of rust on the flue gas pipes, their joints as well as vent dampers, or side wall vent terminals (if so equipped).

• Ensure that nothing is obstructing the flow of combustion and ventilation air and no chemicals, garbage, gasoline, combustible materials, flammable vapors and liquids are stored (not even temporarily) in the vicinity of the boiler.

• Do not allow unsupervised children near the boiler.

• Service/inspection of the boiler and the system is recommended once a year. Maintenance, service and cleaning are specified in the Installation Instructions.
  Before the heating season begins, it is recommended that the boiler and burner be serviced by a qualified heating contractor. Service contracts may be established through gas suppliers or other licensed contractors in your area.

WARNING

• As there are no user-serviceable parts on the boiler, burner or control, the end-user must not perform service activities or adjustments of any kind on system components. Failure to heed this warning can cause property damage, severe personal injury, or loss of life.
• Improper installation, adjustment, service, or maintenance can cause flue products to flow into living space. Flue products contain poisonous carbon monoxide gas which can cause nausea or asphyxiation resulting in severe personal injury or loss of life.

CAUTION

• Should overheating occur or the gas supply fail to shut off, do not disconnect the electrical supply to the pump. Instead, shut off the gas supply at a location external to the appliance.

WARNING

• The operator/ultimate owner is required to have the heating boiler, burners, and controls checked, as a minimum once per year, by the original installer or by a competent heating contractor familiar with the equipment. Defects must be corrected immediately.

CAUTION

• Do not use this boiler if any part has been under water. Immediately call a qualified heating contractor to inspect the boiler and to replace any part of the control system and any gas control which has been under water.

• Frozen water pipe hazard
  Your heating boiler is designed to provide a warm and comfortable living environment. It is not designed to ensure against freezing of water pipes.
  The boiler is equipped with several safety devices that are designed to shut down the boiler and to prevent it from restarting in the event of various unsafe conditions.
  If your boiler remains off for an extended period of time during cold weather, water pipes may freeze and burst, resulting in extensive water damage and conditions in which mold could grow. Certain molds are known to cause respiratory problems, as well as to pose other serious health risks. In case of water damage, immediate measures should be taken to dry out affected areas as quickly as possible to prevent mold from developing.

• If your home will be unattended for an extended period of time during cold weather, you should.

• Shut off the water supply to the building, drain the water pipes and add an antifreeze for potable water to drain traps and toilet tanks. Open faucets where appropriate.

Or..
Have someone check the building frequently during cold weather and call a qualified service agency if required.

Or...

Install a reliable remote temperature sensor that will notify somebody of freezing conditions within the home.

WARNING

• Fire causes a risk of burns and explosion!
• Shut down the boiler
• Close fuel shut-off valves
• Use a tested fire extinguisher, class ABC.
• Replacement components, spare and wear parts

IMPORTANT

Components which are not tested with the heating system may damage the heating system or affect its functions. Installation or replacement may only be performed by a qualified heating contractor. Installation area conditions

WARNING

• Incorrect ambient conditions can lead to damage to the heating system and put safe operation at risk.
• Ensure ambient temperatures are higher than 32°F (0°C) and lower than 104°F (40°C).
• Prevent the air from becoming contaminated by halogenated hydrocarbons (e.g. as contained in paint solvents or cleaning fluids) and excessive dust (e.g. through grinding or polishing work). Combustion air for the heating process, and ventilation of the boiler room must be free of corrosive contaminants. To that end, any boiler must be installed in an area that has no chemical exposure. The list below indicates the main, currently known sources.
• Avoid continuously high levels of humidity (e.g. through frequent drying of laundry).
• Never close existing ventilation openings.

Sources of combustion and ventilation air contaminants Areas likely to contain contaminants:

• New building construction
• Swimming pools
• Remodelling areas, hobby rooms
• Garages with workshops
• Furniture refinishing areas
• Dry cleaning/laundry areas and establishments Auto body shops
• Refrigeration repair shops
• Metal fabrication plants
• Plastic manufacturing plants
• Photo processing plants
• Beauty salons

Products containing contaminants:

• Chlorine-type bleaches, detergents and cleaning solvents found in household laundry rooms Paint and varnish removers
• Hydrochloric acid, muriatic acid
• Chlorine-based swimming pool chemicals Spray cans containing chlorofluorocarbons Chlorinated waxes and cleaners
• Cements and glues
• Refrigerant leaks
• Calcium chloride used for thawing
• Sodium chloride used for water softening salt Permanent wave solutions
• Adhesives used to fasten building products and other similar items
• Antistatic fabric softeners used in clothes dryers

Getting Started

The timer of the control unit switches between “normal room temperature” and “reduced room temperature” at the required times.

1. Normal room temperature for the times you spend at home and require a comfortably warm room temperature [e.g. 68ºF (20ºC)].
   Note: Times and duration of the two room temperatures can be set on the programming unit of your control.
   The temperature settings for both the “normal room temperature” and “reduced room temperature” can be set according to your personal preference.

2. Reduced room temperature for the times you are away from home. To save energy, a lower temperature is typically selected [e.g. 57ºF (14ºC)].

The timer of the control unit switches domestic hot water production on and off at the required times.

1. Domestic hot water heating can be set to take place during the times you spend at home and require hot water for your daily DHW requirements (e.g. for showering).
   Note: Times and duration of the domestic hot water production period can be set on the programming unit of your control. You may select a DHW temperature setting based on your personal preference of up to 140ºF (60ºC).

2. Domestic hot water heating can be set not to take place for the times you spend sleeping, for example.
   Note: The domestic hot water recirculation pump (if installed) ensures that domestic hot water is readily available when domestic hot water is drawn.

Your Vitodens 200 Boiler

• Please ask your heating contractor to check off the appropriate box
• Vitodens 200 without domestic hot water tank
• The control unit activates and deactivates space heating and supplies rooms with heat.
• Vitodens 200 with separate domestic hot water tank
• Domestic hot water heating has priority over space heating. The control unit switches automatically to space heating when the preset domestic hot water temperature is reached.
• Vitodens 200 with integrated DHW plate heat exchanger for instantaneous DHW heating Domestic hot water heating has priority over space heating. The control unit switches automatically to space heating when the heat exchanger temperature is satisfied with comfort switch on) or when the preset domestic hot water temperature is reached (with comfort switch off).

Overview of Controls and Indicators

Main Control Options

All settings can be adjusted directly on the boiler control or on the remote control (when the programming unit is used as remote control).
The programming unit can be removed from the control unit and mounted on a wall-mount base (available as accessory) anywhere in your main living area and used as a remote control. In instances where the programming unit is used as remote control, a temperature indicator
(available as accessory) must be installed in place of the programming unit in the control base on the boiler.
The control unit is located behind the hinged cover in the front of the boiler. Open hinged cover of the control by exerting slight pressure with your fingertip on top of the cover. Ensure hinged cover is closed after every use to guarantee splash protection.

Your System is Preset at the Factory

The control unit comes factory preset to a standard operating mode.
This means your heating system is ready for operation. All factory default settings can be changed to reflect your personal preferences.
Date and time
The date and time are factory preset and are updated through the built-in long-life battery. Should time and/or date be incorrect please see section entitled “Changing Time and Date” on page 18 in this manual.
Heating program
The heating program is set to ”Space heating and domestic hot water”, i.e. space heating and domestic hot water production take place in accordance with preset switching times.
Note: Press button ”D” to reset the switching times to their factory default settings. Please note that this will reset all altered values to their original factory default setting.

Switching times
The switch-on time is set to 6:00 hrs, and the switch-off time to 22:00 hrs. Between 6:00 hrs and 22:00 hrs, space heating takes place at normal room temperature with domestic hot water production (if installed) when required. Between 22:00 hrs and 6:00 hrs, space heating takes place at reduced room temperature.

Operation

Selecting a Heating Program (winter, summer)

Select one of the heating programs according to your personal requirements.

IMPORTANT

The “T” setting is for maintenance and service purposes only and is solely for use by the heating contractor.
Central heating and domestic hot water (e.g. for the winter and transitionary periods)

• Central heating with alternating normal and reduced room temperature according to the preset switching times

• Domestic hot water supply (if DHW cylinder installed)

• Frost protection of the boiler and the DHW cylinder.

• Domestic hot water only (e.g. for the summer)

• No central heating

• Domestic hot water supply (if DHW cylinder installed)

• Frost protection of the boiler and the DHW cylinder.

• Standby operation (e.g. for the summer holiday period)

• No central heating

• No domestic hot water supply

• Frost protection of the boiler and the DHW cylinder.
  Note: The circulation pumps are switched on for a short time every 24 hours to prevent them from seizing up.

• Continuous normal room temperature (e.g. on bank holidays or for parties)

• Central heating continuously with normal room temperature

• Domestic hot water supply (if DHW cylinder installed)

• Frost protection of the boiler and the DHW cylinder.

• Continuous reduced room temperature (e.g. to protect house plants during your winter holiday)

• Central heating continuously with reduced room temperature

• No domestic hot water supply

• Frost protection of the boiler and the DHW cylinder.

Changing the Room Temperature

• In the “Central heating and domestic hot water” heating program, central heating takes place with alternating “normal room temperature” and “reduced room temperature” according to the preset switching times. You can set the required room temperature as follows.

• Normal room temperature
  (factory setting: from 6:00 hrs in the morning) “N” stands for normal setting and corresponds to a room temperature of approx. 20°C / 68°F with a correctly adjusted heating curve. The “normal room temperature” can be set between 13 and 28°C / 55°F and 82°F.

• Example : For the times you spend at home and require a comfortably warm room temperature.

• Reduced room temperature
  (factory setting from 22:00 hrs in the evening)
  “N” stands for normal setting and corresponds to a room temperature of approx. 14°C / 57°F with a correctly adjusted heating curve. The “reduced room temperature” can be set between6 20°C / 43°F and 68°F. “e” stands for frost protection of the boiler and the DHW cylinder.

• Example: For the times you spend sleeping or away from home.

• Changing the room temperature
  Change the temperature to the required value with the appropriate selector knob. 1 graduation corresponds to a temperature change of approx. 1°C / 1.8°F.

Initial Start-up and Re-starting of the Heating System

Initial start-up and adjustment of the control unit to local conditions and the structural characteristics of your building must be performed by your heating contractor. We recommend that you contact your heating contractor before re-starting the heating system if it has been shut down for a long period of time.
To start up the system

1. Check the heating system pressure on the pressure gauge 1. Minimum system pressure 12 psi. If the needle of the pressure gauge is below 12 psi, the system pressure is too low, in which case you must contact your heating contractor.
2. Open flue operation only: Check that the ventilation facilities in the boiler room are open and are not obstructed.
3. Open the gas shutoff valve 2 (field supplied).
4. Switch on line voltage (e.g. at separate fuse/circuit breaker).
5. Switch on the heating system on/off switch 3. Your heating system is now ready for operation.

Shutting Down the Heating System

In case you are not intending to use your heating system for a period of time, e.g. during your summer holidays, switch your heating system to standby operation (see the section entitled ”Selecting a heating program”, page 10). If you do not want to use your heating system for a longer period of time (several months), you should shut it down. We advise you to contact your heating contractor before shutting down the heating system for longer periods of time. Your heating contractor will then take any required action/precautions, e.g. providing freeze-up protection of the system or safeguarding the heat exchanger surfaces.
To shut down the heating system

1. Switch off the heating system on/off switch.
2. Close the gas shutoff valve and secure it against unintentional opening.
3. Switch off-line voltage (e.g. at separate fuse/circuit breaker). The power supply to the system is now switched off. There is no freeze-up protection. All settings of the control unit still remain intact.

Switching Times

By setting the corresponding activation periods, the central heating can be switched up to 4 times per day to and fro between the “normal room temperature” and the “reduced room temperature”. The factory setting gives you the “normal room temperature” in the activation period from 6:00 to 22:00 hrs every day of the week. The activation periods are called up and set on the appropriate timer channel. Each timer channel is effective for a particular part of your heating system as defined in the factory: The time between switching on the“normal room temperature” and changing over to “reduced room temperature” is called an activation period. When setting the activation periods, please take into account the reaction time of your heating system. Therefore choose correspondingly earlier switch-on and switch-off times. Timer channel Central heating (for the heating circuit without mixing valve) Timer channel “M” – Central heating (for a heating circuit with mixing valve)  The domestic hot water supply can be switched on and off up to 4 times per day by setting the corresponding activation periods. The timer channel is effective for the domestic hot water supply (only if a domestic hot water cylinder is installed). The factory setting gives you domestic hot water in the activation period from 6:00 to 22:00 hrs every day of the week. The activation periods for the DHW circulation pump should be selected for those periods when you are at home and require hot water. The domestic hot water circulation pump can be switched on and off up to 4 times per day by setting the corresponding activation periods. The timer channel is effective for the DHW circulation pump (if installed). In the factory setting, the DHW cylinder is operated in the activation period from 6:00 to 22:00 hrs every day of the week .

Scanning the Activation Periods

To set the required day of week 1.

1. Press the “1-7” button and turn the “G” selector knob clockwise or counter-clockwise until the arrow “|” points to the day of the week (1 = Monday, 2 = Tuesday, etc. ) for which you wish to scan the switch-on and switch-off times.
2. Release the “1-7” button

To scan the first activation period

1. Press the red “0” button under the symbol “r” The switch-on time appears.
2. Press the blue “\” button under the symbol “r” The switch-off time appears
   Note: When scanning the switch on and switch off times, note which activation period you are in. The number of horizontal bars between the right and left arrow indicates the corresponding activation period (see “To scan other activation periods”).

To scan other activation periods

1. Press the red “0” button and the blue “\” button under the symbol “r” simultaneously. The figure “ “, “:”, “3” or “-” appears for five seconds.
2. Within five seconds, turn the “G” selector knob clockwise or counter-clockwise until the required activation period appears.
3. To scan the switch-on and switch-off times, follow the same procedure as for scanning the first activation period.
   The figures stand for the activation periods.
   Note: Approx. three minutes after you have finished scanning, the arrow “|” automatically jumps to the current day of the week. For the heating circuit with the mixing valve Scan the activation periods accordingly on timer channel “M”. For the domestic hot water supply Scan the activation periods accordingly on timer channel “w”. For the DHW circulation pump Scan the activation periods accordingly on timer channel “p”.

Changing the Activation Periods

• You can set the activation periods the same for every day of the week or individually for each day.
• Setting the same activation periods for every day of the week
• Press the “D” button – the arrows “|” are displayed for every day of the week I – 7

IMPORTANT

• If you have already set individual activation periods, they are erased when the “D” button is pressed.
• The activation periods are reset to the factory settings (normal room temperature/domestic hot water supply from 6:00 to 22:00 hrs).
  To change the switch-on time for the first activation period

1. Press the red “0” button under the symbol “r” and turn the “G” selector knob clockwise or counter-clockwise until the required switch-on time appears.
2. Release the red “0” button. The displayed switch-on time is stored. To change the switch-off time for the first activation period
3. Press the blue “\” button under the symbol “r” and turn the “G” selector knob clockwise or counter-clockwise until the required switch-off time appears.
4. Release the blue “\” button. The displayed switch-off time is stored.

To select other activation periods (two to four)

1. Press the red “0” button and the blue “\” button under the symbol “r” simultaneously.
   Figure “1” appears for five seconds

2. Within five seconds, turn the “G” selector knob clockwise until the required activation period “2”, “3” or “4” appears along with the corresponding number of horizontal bars.

3. To set the switch-on and switch-off times, follow the same procedure as for setting the first activation period.

Note: figure “1” stands for the first activation period.

For the heating circuit with a mixing valve Change the activation periods accordingly on timer channel “M”. For the domestic hot water supply Change the activation periods accordingly on timer channel “w”. For the DHW circulation pump Change the activation periods accordingly on timer channel “p”. or To set individual activation periods for individual days of the week, see page 16.

Setting individual activation periods for individual days of the week
To set the required day of the week

1. Press the “1-7” button and turn the “G” selector knob clockwise or counter-clockwise until the arrow “|.” points to the day of the week (1 = Monday, 2 = Tuesday, etc ) for which you wish to set the switch-on and switch-off times.
2. Release the “1-7” button

To change the switch-on time for the first activation period

1. Press the red “0” button under the symbol “r” and turn the “G” selector knob clockwise or counter-clockwise until the required switch-on time appears.
2. Release the red “0” button. The displayed switch-on time is stored.

To change the switch-off time for the first activation period

1. Press the blue “\” button under the symbol “r” and turn the “G” selector knob clockwise or counter-clockwise until the required switch-off time appears.
2. Release the blue “\” button. The displayed switch-off time is stored.

To select other activation periods (two to four)

1. Press the red “0” button and the blue “\” button under the symbol “r” simultaneously. Figure “1” appears for five seconds.
   Note: figure “1” stands for the first activation period.

2. Within five seconds, turn the “G” selector knob clockwise until the required activation period “2”, “3” or “ 4” appears along with the corresponding number of horizontal bars.

3. To set the switch-on and switch-off times, follow the same procedure as for setting the first activation period.
   Note: Approx. three minutes after you have finished setting the arrow “|” automatically jumps to the current day of the week.

4. For the heating circuit with the mixing valve Change the activation periods accordingly on timer channel “M”. For the domestic hot water supply Change the activation periods accordingly on timer channel “w”. For the DHW circulation pump Change the activation periods accordingly on timer channel “p”.

Erasing the Activation Periods

Setting individual activation periods for individual days of the week

1. Press the “1-7” button and turn the “G” selector knob clockwise or counter-clockwise until the arrow “|” points to the day of the week (1 = Monday, 2 = Tuesday, etc ) for which you wish to erase the switch-on and switch-off times.
2. Release the “1-7” button
3. Press the red “0” button and the blue “\” button of the corresponding timer channel (“r”, “M”, “w” or “p”) simultaneously. Figure “1“, “2”, “3” or “4” appears for five seconds.
4. Within five seconds, turn the “G” selector knob clockwise or counter-clockwise until the required activation period appears
5. Press the red “0” button of the corresponding timer channel (“r”, “M”, “w” or “p”) and turn the “G” selector knob counter-clock-wise until “–:–” appears.
6. Release the red “0” button The switch-on time is erased.
7. Press the blue “\” button of the corresponding timer channel (“r”, “M”, “w” or “p”) and turn the “G” selector knob counter-clock-wise until “–:–” appears.
8. Release the blue “\” button The switch-on time is erased. or press the “D” button.

Note: Approx. three minutes after you have finished erasing the arrow “|” automatically jumps to the current day of the week.

IMPORTANT

All switching times are reset to the factory settings (from 6.00 to 22.00 hrs.

Changing the Domestic Hot Water Temperature Only with a boiler with a separate DHW cylinder

Select the domestic hot water temperature to suit your personal requirements e.g. for showering.

1. Open the cover on the programming unit.
2. Turn the “w” selector knob to the required temperature. 1 graduation corresponds to a temperature change of approx. 2°C.

Setting the Energy Saving Mode for the Holiday Period

If you are going on holiday and want to set your heating system to the minimum energy consumption, choose one of the following heating programs.
Standby operation

• No central heating
• No domestic hot water supply
• Frost protection of the boiler and the DHW cylinder e.g. for the summer holiday period.

Note: The circulation pumps are switched on for a short time every 24 hours to prevent them from seizing up.

• Continuous reduced room temperature
• Central heating continuously with reduced room temperature
• No domestic hot water supply
• Frost protection of the boiler and the DHW cylinder e.g. to protect house plants during your winter holiday.
• Note: The reduced room temperature can be adjusted separately (see the section headed “Changing the room temperature” on page 11).

Resetting the Time (if required)

1. Press the “I” button and turn the “G” selector knob clockwise or counter-clockwise until the required time is displayed.
2. Release the “I” button. The time is stored.

Note: The date and time (CET) are preset in the factory and are updated through the built-in long-life battery. Resetting for summer/winter time takes place automatically.

Scanning Temperatures

You can scan various current temperature values on the programming unit.

1. Choose the code number for the temperature concerned from the table below:

Code number| Meaning of display| Actual temp. in ºC

(display example)

---|---|---
1| * 1| Outdoor temp.| 1:| 8| ºC
3| Boiler water temp.| 3:| 63| ºC
4| * 2| Flow temperature, a heating circuit with mixing valve| 4:| 48| ºC
5| * 2| Cylinder temp.| 5:| 50| ºC
7| * 2| Room temp. (only if the programming unit is used as a room temp. dependent remote control)| 7:| 20| ºC

1. The temperature value displayed measures weather conditions such as wind, sunshine, and the wall temperature of the building.
2. 0nly if the sensor is connected/activated.
3. Press the “?” button and turn the “G” selector knob clockwise or counter-clockwise until the code number 1 for the corresponding temperature appears in the display window. The current temperature value of 2 appears at the same time.
4. Release the “?” button. The temperature scan is ended.

Changing the Heating Pattern of the Boiler

• The slope of the heating curve is usually within the indicated range.
• High-temperature heating system, e.g. fin-tube radiation, fan coils
• Medium temperature heating system, e.g. cast iron radiation, staple-up radiant floor heating
• Low-temperature heating system, e.g. radiant floor heating

The heating pattern of your boiler is influenced by the outdoor temperature and the settings of the “n” and “N” selector knobs. You can change the settings if you establish over a prolonged period during the heating season that the room temperature does not meet your requirements. After changing the settings, please observe the difference in the heating pattern over a sufficiently long period before altering the settings again. Short-term changes in the room temperature are carried out with the “s” or “m” selector knobs (see “Changing the room temperature” on page 11).

Note: In the factory settings the “n” selector knob is set to 1.4 and the “’ N” selector knob to 0 The setting of the “n” selector knob is normally in the range of 0.2 to 0.8 for underfloor heating systems

• in the range of 0.2 to 0.8 for underfloor heating systems
• in the range of 0.8 to 1.4 for modulating heating systems
• in the range of 1.4 to 2.0 for heating systems with boiler water temperatures over 75ºC / 167°F

Override Switch/Emission Test Switch

The following information is provided for emission inspection purposes, and for temporary override of the outdoor reset control.
For flue gas measurement at constant boiler water temperature for a short period of time:

1. Open the hinged cover on the enclosure panel.
2. Turn the emission test switch ”S” from ”a” to ”h”.
3. Activate heat emitters (e.g. by opening the thermostatic valves).
4. After completing the measurement, turn the emissions test switch ”S” back to ”a”.
5. Close cover.

The following functions are triggered when using the emission test switch (manual operation):

• The boiler water temperature is limited by a limit aquastat.
• The circulation pumps are activated.
• The mixing valve (if installed) remains in its control mode.
• The burner is switched on (at max. input).

Diagnosis and Correction

Circuit breaker or fuse in power  supply, in power/pump module or in boiler control unit has blown or tripped| Inform heating contractor.
Burner does not switch on or only intermittently| No gas| Open gas shut-off valve.
Control unit incorrectly programmed or set| Check, and if necessary, correct setting of heating program selector switch and timer programming.
Fault on control unit| After consulting your heating contractor, the boiler can be operated temporarily at constant boiler water temperature by operating the emissions test switch ”S”.
Burner does not start up; red burner fault lamp ”U” is lit on control unit| Faulty start| Press burner fault reset button ”EU”.

– if this attempt fails, contact your heating contractor.

Burner is switched off even if the rooms have not reached the required temperature| Domestic hot water supply has priority (operation with DHW storage tank only)| Inform heating contractor.
Low water level or pressure, water pressure sensor has activated| Inform heating contractor.
The rooms are too cold even though burner is operating| Domestic hot water heating has priority (operation with DHW cylnder only)| Wait until the domestic hot water cylinder has heated up.
The green LED “m” and the red LED “w” (behind the cover) are flashing| Heating program selector switch incorrectly set| Set the heating program selector switch to one of the following heating programs: “w”, “r  w”, “s” or “m”
Fault on control unit| Inform heating contractor.
If mixing valve controller installed: Boiler in operation, but heating circuit cold| Mixing valve controller defective| Pull out the motor lever and adjust mixing valve lever 1 manually. Inform the heating contractor.

A flashing error code appears in display window| Heating system fault| Make a note of the fault code and inform heating contractor

WARNING

Visually inspect the vent termination for any signs of blockage. Under cold climate conditions (sustained temperatures below 0°F / -18°C) the vent termination may be severely blocked by icicle and frost build-up. The boiler control will automatically shut down the boiler should air or vent be blocked. Remove blockage if possible. Acknowledge the fault and the boiler should attempt to restart. If blockage is not obvious and cannot be removed, contact a qualified service technician.

Service Instructions for Your Heating System

Viessmann strongly recommends inspection/service of the boiler and the system by a licensed professional heating contractor once a year. Before the heating season begins, the boiler with its burner(s) and direct vent system should be serviced by a qualified heating contractor. Service contracts may be established through gas suppliers or other licensed contractors in your area. Regular inspection/service ensures troublefree, energy-efficient and environmentally friendly heating activity of your heating system.

IMPORTANT

If the domestic cold water supply to the hot water storage tank has a water treatment device (water softener) installed, ensure its proper working condition is checked regularly by your heating contractor. The same applies if a dirt trap or a water filter is installed in the domestic cold water supply. Any of these devices installed in the domestic cold water supply must be flushed out and serviced on a regular basis.

Boiler
All boilers must be cleaned on a regular basis as debris build-up will result in increased flue gas temperature, and thus in increased energy consumption.
Notes on operation:

• Ensure the boiler room and boiler are clean.
• Regularly check the heating system pressure on the pressure gauge:
• If the needle pressure gauge is below 12 psi, the system pressure is too low; in this case, please contact your heating contractor.
• Domestic hot water storage tank
• Inspection and (if necessary) cleaning of the tank must take place within 2 years of initial start-up and as required thereafter.
• Cleaning of the inside surfaces of the domestic hot water storage tank, including domestic hot water connections, may only be performed by a licensed professional heating contractor.

Vitocell 100:

• Viessmann recommends an annual inspection, and replacement if required, of the consumable anode by a licensed professional heating contractor.
• The inspection can be carried out during the regular operation of the heating system; shutdown is not required.
• The heating contractor measures the protective current with an anode testing instrument.
• Drinking water filter (if installed)
• For hygienic reasons
• replace the filter element every 6 months on filters which cannot be flushed back, and perform a visual inspection every 2 months,
• flush back reversible flow filters every 2 months.
• Please follow the manufacturer’s instructions.

How to Save Energy

by heating correctly

Apart from taking advantage of the benefits of a modern heating system, there is a lot you can do yourself to achieve additional fuel savings.
For instance:

Don’t overheat:

• Aim at a room temperature of 68ºF/20ºC. Every degree less in room temperature will reduce your heating bills by up to 6%.
• Close window shutters 1 (if installed) at dusk.
• Operate thermostatic valve 2 correctly.
• Don’t obstruct radiator 3 and thermostatic valves 2.
• Make use of individual adjustment options of the control unit 4; e.g. ”normal room temperature” alternating with ”reduced room temperature”.
• Set the domestic hot water temperature of the DHW tank 5 on the control unit 4.
• Control your consumption of hot water:
• A shower generally consumes less energy than a bath.

with regular maintenance

• Regular maintenance check-ups of your heating system 6 by a licensed professional heating contractor will ensure energy savings and environmentally friendly operation.

with effective insulation

• If you wish to make use of additional energy-saving measures, check the thermal insulation:
• of heating and domestic hot water pipes. of external walls and the roof.
• between heated and unheated rooms. of the windows.

Lighting and Operating Instructions

| FOR YOUR SAFETY READ BEFORE OPERATING|
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W A R N I N G: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury, or loss of life.

A. This appliance does not have a pilot. It is equipped C. Use only your hand to push in or turn the gas with an ignition device that automatically lights the control knob. Never use tools. If the knob will the burner. Do not try to light the burner by hand. not push in or turn by hand, and don’t try to

repair it, and call a qualified service technician.

B. BEFORE OPERATING smell all around the appliance Force or attempted repair may result in a fire area for gas. Be sure to smell next to the floor or an explosion.

because some gas is heavier than air and will

settle on the floor. D. Do not use this appliance if any part has been WHAT  TO  DO  IF  YOU SMELL GAS under water. Immediately call a qualified

•  Do not try to light any appliance. a service technician to inspect the  appliance

•  Do not touch any electric switch; do not use any and replace any part of the control system phone in your building. and any gas control which has been under

•  Immediately call your gas supplier from a water. neighbor’s phone. Follow the gas supplier’s

instructions.

•  If you cannot reach your gas supplier, call the fire department.

**OPERATING INSTRUCTIONS
1. STOP! Read the safety information above on 5. Close the main gas shut-off valve. this label.**

2. Set thermostat or other operating control to 6. Wait five (5) minutes to clear out any gas. lowest setting. Then smell for gas, including near the floor.

If you smell gas, STOP! Follow “B” in the

3. Turn off all electric power to the appliance. safety information above on this label. If you

don’t smell gas, go to the next step.

4. This appliance is equipped with an ignition

device that automatically lights the burner. 7. Open the main gas shut-off valve. Do not try to light the burner by hand.

Manual gas shutoff 8. Turn on all electric power to the appliance.

9. Set the thermostat or other operating control to the desired setting.

**Closed 10. If the appliance will not operate, follow the instructions “To Turn Off Gas To Appliance” and call your service technician or gas supplier.**

Open

TO TURN OFF THE GAS TO THE APPLIANCE
1. Set the thermostat or other operating control to the lowest setting.

2. Turn off all electric power to the appliance if service is to be performed.

3. Close the main gas shut-off valve.

• Viessmann Manufacturing Company Inc.

• 750 McMurray Road

• Waterloo, Ontario N2V 2G5 Canada

• Techinfo Line 1-888-484-8643

• 1-800-387-7373 Fax (519) 885-0887

• www.viessmann.ca
  

• info@viessmann.ca
  

• Viessmann Manufacturing Company (U.S.) Inc.

• 45 Access Road

• Warwick, Rhode Island 02886 USA

• Techlnfo Line 1-844-649-5886

• 1-800-288-0667 Fax (401) 732-0590

• www.viessmann-us.com
  

• info@viessmann-us.com

Documents / Resources

| VIESSMANN Vitodens 200, WB2 series Wall-Mounted, Gas-Fired Condensing Boiler [pdf] Instruction Manual
Vitodens 200 WB2 series Wall-Mounted Gas-Fired Condensing Boiler, Vitodens 200 WB2 series, Wall-Mounted Gas-Fired Condensing Boiler, Gas-Fired Condensing Boiler, Condensing Boiler, Boiler
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