Viessmann VITODENS 200 WB2 Series Guide

VITODENS 200
Operating Instructions &
User’s Information Manual
Vitodens 200
WB2 Series
Wall-mounted, gas-fired condensing boiler
For natural gas and liquid propane
Heating input NG 25 to 230 MBH
7to 67kW
Heating input LP 25 to 214 MBH
7to 63kW
Read and save these instructions
for future reference.
IMPORTANT
If the information in this manual is not followed
exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
WARNING
Improper installation, adjustment, and/or
operation could cause carbon monoxide
poisoning resulting in injury or loss of life.
This product must be installed and serviced by a
professional service technician who is
experienced and qualified in hot water boiler
installation and gas combustion.
WARNING
Do not store or use gasoline or other flammable
liquids in the vicinity of this or any other
appliance.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliances.
Do not touch any electrical switches, do not
use any phone in your building.
Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
If you cannot reach your gas supplier, call the
fire department.
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
Please file in Service Binder
5167 475 v1.2 07/2007

Safety, Installation and Warranty Requirements
2
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).
HLicensed professional heating
contractor
The installation, service, and
maintenance of this equipment must
be performed by a licensed
professional heating contractor.
"Please see section
entitled “Important
Regulatory and
Installation
Requirements” in the
Installation Instructions.
HProduct 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
Installation Requirements”
in the Installation Instructions.
HAdvice 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, shut-down
procedure, and the need for
professional service annually before
the heating season begins.
HCarbon monoxide
Improper installation, 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, service and
maintenance of this
equipment to avoid
formation of carbon monoxide, please
see the Installation Instructions of the
Vitodens 200 Direct Vent System.
HEquipment venting
Never operate boiler without an
installed venting system. An improper
venting system can cause carbon
monoxide poisoning.
HWarranty
Information contained in
this and related product
documentation must be
read and followed. Failure
to do so renders warranty
null and void.
5167 475 v1.2
Installers must follow local
regulations with respect to
installation of carbon monoxide
detectors. Follow manufacturer’s
maintenance schedule of boiler.
WARNING

Index
3
Page
General Information About these Instructions 5........................................................
Safety For your Safety 5........................................................................
Useful Tips Inform Yourself 9..........................................................................
Getting started... 9.....................................................................
Your Vitodens 200 boiler 10........................................................
Overview of controls and indicators 10..................................
Quick Reference Ready for Operation 12.................................................................
The main control options 12.......................................................
Your heating system comes factory preset... 12.................
Selecting a heating program (winter, summer) 13...............
Changing room temperature 14.................................................
Using Comfort Functions 14......................................................
Switching DHW comfort function on/off 14..........................
Setting the party mode 15..........................................................
Activating the energy saving mode 15...................................
Using the remote programming option 16..............................
Reference Guide Switching On and Off 16.............................................................
Initial start-up and re-starting the heating system 16.........
Shutting down the heating system 17....................................
Menu-driven Operation 18...........................................................
The programming unit is your assistant 18...........................
Space Heating Settings (Switching Times) 19......................
How switching times work... 19...............................................
Scanning and changing switching times 19..........................
Domestic Hot Water Supply Settings
(Switching Times) 21
.....................................................................
How switching times work... 21...............................................
Scanning and changing switching times 21..........................
Changing the domestic hot water temperature 23..............
When you go on holidays... 24..................................................
Setting the energy saving mode for the holiday period 24
Other Settings 25..........................................................................
Changing time and date 25.........................................................
Scanning temperatures and operating status 25..................
Selecting the language 25...........................................................
Changing the heating pattern of the boiler 26......................
5167 475 v1.2

4
Emission Inspection Override Switch/Emission Test Switch 28.............................
Information Troubleshooting Guide 29............................................................
Diagnosis and correction 29.......................................................
Service Instructions 32................................................................
Service instructions for your heating system 32.................
How to Save Energy 33...............................................................
Directories 34..................................................................................
Overview of menu structures 34..............................................
Lighting and operating instructions 36.....................................
Alphabetical index 39...................................................................

General Information/Safety
5
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.
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 in
column three.
This symbol indicates that other
instructions must be referenced.
For your Safety
HOperation
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.
HWorking 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.
HMaintenance and cleaning
Regular inspection and service by a
qualified heating contractor is important
to the performance of the Viessmann
Vitodens 200. Neglected maintenance
impacts on warranty; regular inspection
ensures clean, environmentally friendly
and efficient operation. We recommend
a maintenance contract with a qualified
heating contractor.
HFlue gas smell
- Deactivate heating equipment.
- Open windows and doors.
- Inform your heating contractor.
HDangerous conditions
- Deactivate main power immediately.
- Close gas supply valve.
HTechnical information
Literature applicable to all aspects of the
Vitodens 200:
- Technical Data Manual
- Installation Instructions
- Start-up/Service Instructions
- Operating Instructions
and User’s Information Manual
- System Design Guidelines
Additional applicable literature:
- Accessory manuals
5167 475 v1.2
Indicates an imminently hazardous
situation which, if not avoided, could
result in death, serious injury or
substantial product/property damage.
WARNING
Indicates an imminently hazardous
situation which, if not avoided, may
result in minor injury or
product/property damage.
CAUTION
IMPORTANT

SafetySafety
6
For your Safety (continued)
HCarbon 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
2034-2002, CSA 6.19-01) 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.
HFor 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
death. 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.
-Donot 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.
5167 475 v1.25167 475 v1.2
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.
WARNING
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.
WARNING
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.
CAUTION
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.
WARNING
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.
CAUTION

Safety
7
For your Safety (continued)
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...
HShut 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..
HHave someone check the building
frequently during cold weather and call a
qualified service agency if required.
Or...
HInstall a reliable remote temperature
sensor that will notify somebody of
freezing conditions within the home.
5167 475 v1.2
Failure to protect against frozen pipes
could result in burst water pipes,
serious property damage and/or
personal injury. Boiler may shut down.
Do not leave your home unattended for
long periods of time during freezing
weather conditions without turning off
the water supply and draining water
pipes or otherwise protecting against
the risk of frozen pipes.
WARNING

Safety
8
For your Safety (continued)
If you notice fire coming from the
appliance, call the fire department
immediately! Do not attempt to extinguish
the fire unless qualified to do so.
Installation area conditions
HEnsure ambient temperatures are higher
than 32°F / 0°C and lower than
104°F / 40°C.
HPrevent the air from becoming
contaminated by halogenated
hydrocarbons (e.g. as contained in
paints 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 to the right indicates the main,
currently known sources.
HAvoid continuously high levels of
humidity (e.g. through frequent drying of
laundry).
HNever close existing ventilation
openings.
Replacement components, spare and wear
parts
Components which are not tested with
the heating system may damage the
heating system, or affect its functions.
Installation or replacement may only be
carried out by a qualified heating
contractor.
Sources of combustion and ventilation air
contaminants
Areas likely to contain contaminants:
HNew building construction
HSwimming pools
HRemodelling areas, hobby rooms
HGarages with workshops
HFurniture refinishing areas
HDry cleaning/laundry areas and
establishments
HAuto body shops
HRefrigeration repair shops
HMetal fabrication plants
HPlastic manufacturing plants
HPhoto processing plants
HBeauty salons
Products containing contaminants:
HChlorine-type bleaches, detergents and
cleaning solvents found in household
laundry rooms
HPaint and varnish removers
HHydrochloric acid, muriatic acid
HChlorine-based swimming pool chemicals
HSpray cans containing
chlorofluorocarbons
HChlorinated waxes and cleaners
HCements and glues
HRefrigerant leaks
HCalcium chloride used for thawing
HSodium chloride used for water
softening salt
HPermanent wave solutions
HAdhesives used to fasten building
products and other similar items
HAntistatic fabric softeners used in
clothes dryers
5167 475 v1.2
Fire causes a risk of burns and
explosion!
HShut down the boiler
HClose fuel shut-off valves
HUse a tested fire extinguisher, class
ABC.
WARNING
Incorrect ambient conditions can lead to
damage to the heating system and put
safe operation at risk.
WARNING
IMPORTANT

Inform Yourself
9
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. 68 ºF/20 ºC).
2. Reduced room temperature
for the times you are away from
home. To save energy,
a lower temperature is typically
selected (e.g. 57 ºF/14 ºC).
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.
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).
2. Domestic hot water heating can be
set not to take place
for the times you spend sleeping, for
example.
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 140 ºF/60 ºC.
The domestic hot water recirculation
pump (if installed) ensures that
domestic hot water is readily available
when domestic hot water is drawn.
5167 475 v1.2

Inform Yourself
10
Your Vitodens 200 Boiler
Please ask your heating contractor to check off the appropriate box ( ).
jVitodens 200
without domestic hot water tank
The control unit activates and
deactivates space heating and
supplies rooms with heat.
jVitodens 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.
jVitodens 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
Pressure gage
Display window
Heating program selector switch
Burner fault reset button
Emission test switch (override switch)
Selector knob for ”normal room temperature”
Burner operating status indicator
Burner fault indicator
Boiler on/off switch
Party button
Energy savings button
Selector knob for ”reduced room temperature”
Information button
”Factory default settings” button
Selector knob
Flip-down cover
Selector buttons
DHW comfort function switch (only operational
on Combi heating boiler with integrated
instantaneous hot water heating)
5167 475 v1.2
Programming Unit (removable)
0
12
3
0
0
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46
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8
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10
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456
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BA
DC
-+i
15
30
45
60
0

Inform Yourself
11
Overview of Controls and Indicators (continued)
Operation
The is a menu-driven programming unit.
Upon opening the flip-down cover of the
programming unit, the start menu showing
all available adjustment options will appear
in the display window. Select your
adjustment option by pressing buttons
“A”, “B”, “C” or “D”.
An overview of the menu structures
available can be found in section entitled
“Overview of menu structures” on page 34
of this manual.
5167 475 v1.2
MAIN MENU
Please select
>HTG. CIRCUIT A: A..............
>HTG. CIRCUIT B: B..............
>DHW: C........................
>SYSTEM: D.....................
>EXIT: CLOSE COVER..............

Ready for Operation
12
The 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 heating system comes factory preset ...
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 25 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.
Switching times
The switch-on time is set to 6:00 hrs,
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.
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.
5167 475 v1.2

Ready for Operation
13
Selecting a Heating Program (winter, summer)
Select one of the following heating programs according to your personal
requirements.
Space heating and domestic hot water
HSpace heating at
normal or reduced room
temperature according to preset
switching times
HDomestic hot water production
(with DHW tank installed or with
Combi heating boiler)
HFreeze-up protection of boiler and the
DHW storage tank.
Domestic hot water only
HNo space heating
HDomestic hot water production
(with DHW tank installed or with
Combi heating boiler)
HFreeze-up protection of boiler and
DHW storage tank.
Standby operation
HNo space heating
HNo domestic hot water production
HFreeze-up protection of boiler and
DHW storage tank.
e.g. for winter months and transitional
periods.
e.g. for summer months.
e.g. for summer holiday period.
The circulation pumps are switched on
for a short time every 24 hours to
prevent them from seizing up.
5167 475 v1.2
IMPORTANT

Ready for Operation/Using Comfort Functions
14
Changing Room Temperature
In the ”Space heating and domestic hot water” heating program, space heating
takes place at ”normal room temperature” and ”reduced room temperature”
depending on preset switching times.
You can set the required room temperature as follows.
”Normal room temperature”
(factory default setting: 6:00 hrs to
22:00 hrs)
Setting ”5” corresponds to a room
temperature of approx. 68 ºF/20 ºC
with a correctly adjusted heating curve.
“Normal room temperature” can be set
between 41 and 95 ºF/ 5 and 35 ºC.
”Reduced room temperature”
(factory setting: 22:00 hrs to 6:00 hrs)
Setting ”e” corresponds to a room
temperature of approx. 41 ºF/5 ºC with
a correctly adjusted heating curve.
”Reduced room temperature” can be set
between 41 and 95 ºF/
5and35ºC.
Example
For the times you spend at home and
require a comfortably warm room
temperature.
Example
At nighttime or when you are away
from home.
SELECTED ROOM TEMP.
PREVIOUS: 20ºC
CURRENT: 22ºC
INFO: OPEN COVER
Changing the room temperature
1. Turn selector knob ”s”or”m”.
The (previous and current)
temperature values appear in the
display window.
2. Set the (current) temperature required
using the selector knob.
3. The display automatically disappears
after approx. 5 seconds. The selected
temperature is stored.
Please reference section ”Changing
the heating pattern of the boiler” on
page 26 in this manual.
Switching DHW Comfort Function On/Off (for Combi Series with integrated instantaneous DHW heat exchanger)
When the comfort function is activated, the integrated instantaneous hot water
heating function maintains a certain domestic hot water temperature level (standby).
Domestic hot water is thus readily available when required.
With button ”/“ the comfort function
can be switched on and off.
The DHW comfort function can be
deactivated in order to avoid frequent
activation of the boiler, i.e. to reduce
the energy consumption used for
maintaining a certain DHW
temperature if no domestic hot water
is drawn (e.g. at nighttime).
5167 475 v1.2
Colder Warmer
Colder Warmer

Using Comfort Functions
15
Setting the Party Mode
Activate the party mode when you require space heating for a short period of time,
independent of the preset heating program and outside the preset switching times. You
can adjust the room temperature (party temperature) to suit your personal preference.
MONDAY, 20.05.97
10:30 pm
PARTY MODE
SELECTED: 20ºC
CHANGE PARTY TEMP.:
OPEN COVER
BOILER TEMP.: 53ºC
To activate the party mode
Press the party button ”g”.
The party mode is now displayed
together with the preset party
temperature.
To change the room temperature (party
temperature)
Open the flip-down cover of the
programming unit and follow the
instructions in the display window.
Ensure cover is closed when change is
made.
To cancel the party mode
The party mode is cancelled
automatically the next time the preset
heating program switches to ”normal
room temperature”.
If you want to cancel the party mode
immediately, press the party button
”g”again.
Example
Use the party mode option when you
wish to stay up longer than usual (e.g.
when you have guests) and require
space heating without having to
change the switching times.
Activating the Energy Saving Mode
Activate the energy saving mode when you require particularly economical space
heating for a short period of time. In the energy saving mode, the preset room
temperature is automatically lowered by approx. 3.6 ºF/2 ºC.
TUESDAY, 21.05.97
10:35 HRS
ENERGY SAVING MODE S
BOILER TEMP.: 53ºC
INFO: OPEN COVER
To activate the energy saving mode
Press the energy saving button ”S”.
The energy saving mode is now
displayed.
To cancel the energy saving mode
The energy saving mode is cancelled
automatically the next time the preset
heating program switches to ”reduced
room temperature”.
If you want to cancel the energy saving
mode immediately, press the energy
saving button ”S”again.
Example
Use the energy saving mode option
when you are not at home for a period
of time (e.g. to go shopping) and wish
to lower the temperature without
having to adjust the temperature
selector switch and the switching
times.
5167 475 v1.2

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16
Using the Remote Programming Option
The programming unit provides you with the option of programming your right from
your armchair. Simply remove the programming unit from the control base in the
front of the boiler or, if used as remote control, from the wall-mount base, and
perform your programming from wherever convenient.
Be sure to insert the programming unit in the control unit or wall-mount base upon
completion of your programming.
The following options can be
programmed:
HTime programs
HRoom temperature values
HHeating curves
HTime and date
Before using the ”remote programming
option” for the first time, insert the
programming unit in the control unit or
in the wall-mount base for approx. 2
minutes. Switch off the heating
system switch on the control unit
before removing and inserting the
programming unit.
Initial Start-up and Re-starting 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 heating system pressure on
the pressure gage 1.
Minimum system pressure 12 psig.
If the needle of the pressure gage is
below 12 psig, the system pressure
is too low, in which case you must
contact your heating contractor.
2. Open the gas shutoff valve 2(field
supplied).
3. Switch on line voltage (e.g. at
separate fuse/circuit breaker).
4. Switch on the heating system on/off
switch 3.
Your heating system is now ready for
operation.
5167 475 v1.2
Using Comfort Functions/Switching On and Off
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Switching On and Off
17
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
section entitled ”Selecting a heating program”, page 13).
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 gas shutoff valve and secure
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.
5167 475 v1.2

Menu-driven Operation
18
The Programming Unit Is Your Assistant
With the programming unit you can set the heating system settings according to
your personal preferences and requirements by using the various functions and
adjustment options offered through the programming unit. Most of the functions
offered are easily accessible through the main menu.
Thus switching times, temperatures and heating curves can be navigated and
adjusted in a straight-forward fashion.
Information button
DFactory default setting
Display window (with cover open)
Overview of possible settings
GSelector knob
Flip-down cover
A, B, C, D Selector buttons
When you open the cover on the
programming unit, the display shows an
overview of possible settings. Select
the settings you require by using
selector buttons ”A”, ”B”, ”C”or”D”.
If the display requests you to enter a
numerical value, you can define the
value with selector knob ”G”.
The steps required to make individual
settings are explained in detail on the
following pages.
You will find an overview of the menu
structures (in section entitled
”Overview of Menu Structures”) on
page 34 of this manual.
5167 475 v1.2
MAIN MENU
PLEASE SELECT!
>HTG. CIRCUIT A: A..............
>HTG. CIRCUIT B: B..............
>DHW: C........................
>SYSTEM: D.....................
>EXIT: CLOSE COVER
MAIN MENU
Please select
>HTG. CIRCUIT A: A...........
>HTG. CIRCUIT B: B............
>DHW: C......................
>SYSTEM: D...................
>EXIT: CLOSE COVER.......

Space Heating Settings (Switching Times)
19
How Switching Times Work ...
By setting the switching times
accordingly, space heating can switch
up to 4 times a day between ”normal
room temperature” and ”reduced room
temperature”.
In the factory default setting, space
heating takes place at ”normal room
temperature” between 6:00 hrs until
22:00 hrs every day of the week.
When setting switching times, take
into account the reaction time required
by your heating system.
Select earlier switch-on and switch-off
times accordingly.
Scanning and Changing Switching Times
To change switching times for the day displayed
Press the following buttons:
1. Afor ”Heating circuit A”
or
Bfor ”Heating circuit B”
2. Afor ”Timer”
3. Afor ”Switching times”
HC A /ALL DAYS
06:00-22:00
--:-- --:--
--:-- --:--
--:-- --:--
>CHANGE: ,THENA
>RETAIN:................... B
>BACK: ................... C
4. Afor ”Time schedule”
5. Turn the ”G” selector
knob to set the switching
times
6. Ato confirm each setting
You can scan the switching times for
the day displayed following the same
procedure.
Exit the switching time setting mode by
closing the cover or by pressing the ”C”
button to return to menu option
”Switching times”.
In each of the 4 input lines of the
display window you can enter one
switch-on time and one switch-off
time at which the ”normal room
temperature” is to be switched on/off.
In case you inadvertently change a
switching time, you can reset it to the
original setting by pressing button
”B”, as long as the change has not
been confirmed.
5167 475 v1.2

Central Heating Settings (Switching Times)
20
Scanning and Changing Switching Times (continued)
To change switching times for other days of the week
Press the following buttons:
PLEASE SELECT!
/ALL DAYS IDENTICAL/
/MO/TU/WE/TH/FR/
/SA/SU/
/FACTORY SETTING/
>SELECT:...................A
>CONFIRM:................B
>BACK:.....................C
1. Afor ”Heating circuit A”
or
Bfor ”Heating circuit B”
2. Afor ”Timer”
3. Afor ”Switching times”
4. Bfor ”Different days”
5. Acontinue pressing Auntil the
desired day flashes
6. Bto confirm your selection
Examples:
Select ”MO” if you wish to change the
switching times for Monday only.
Select ”ALL DAYS IDENTICAL” if you
wish to set the same switching times
for every day of the week.
HC A /ALL DAYS
06:00-22:00
--:-- --:--
--:-- --:--
--:-- --:--
>CHANGE: ,THENA
>RETAIN:...................B
>BACK:.....................C
7. Afor ”Time schedule”
8. Turn the ”G” selector
knob to set the switching
times
9. Ato confirm each setting
You can scan the switching times for
the day displayed following the same
procedure.
Exit the switching time setting mode by
closing the cover or by pressing the ”C”
button to return to menu option
”Switching times”.
Please note:
In each of the 4 input lines of the
display window you can enter one
switch-on time and one switch-off
time at which the ”normal room
temperature” is to be switched on/off.
In case you inadvertently change a
switching time, you can reset it to the
original setting by pressing button
”B”, as long as the change has not
been confirmed.
5167 475 v1.2