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5

Operating manual atmoCRAFT

 Caution!

Any improper use is forbidden.

The appliances must be installed by a heating engineer, 
who is responsible for adhering to the existing 
regulations, rules and guidelines.

3.3 

Requirements of the installation site

The Vaillant gas heating boilers atmoCRAFT must be 
installed in boiler rooms. Ask your heating engineer 
which national regulations must be observed.
The entire installation site should be frost-proof. 
Observe the specified frost protection measures in 
section 4.10 if you are unable to ensure this 
requirement.

 Note!

It is not necessary to keep a clearance between 
the appliance and combustible materials or 
components, since at the rated heating power 
of the appliance the temperature at the surface 
of the housing is always lower than the 
maximum allowed temperature of 85 °C.

3.4 Care

•  Clean the exterior of your appliance with a damp cloth 

and a little soap.

 Note!

Do not use scouring or cleaning agents, which 
might damage the exterior or plastic controls.

3.5 Recycling 

and 

disposal

Both your Valliant atmoCRAFT gas boiler and its 
packaging consist mainly of recyclable raw materials.

3.5.1 Appliance

Do not dispose of your Valliant atmoCRAFT gas boiler or 
any of its accessories with household waste. Make sure 
the old appliance and any accessories are disposed of 
properly.

3.5.2 Packaging

Please leave the disposal of the transport packaging to 
the qualified servicing company which installed the 
appliance. 

 Note!

Please observe the applicable national legal 
regulations.

3.6 

Energy saving tips

Installing a weather compensator

Weather compensators regulate the heating supply 
temperature according to the outside temperature. No 
more heat is created than is required. The designated 
heating feed temperature for the corresponding outside 
temperature must be set on the weather compensator. 
This setting must not be greater than that required by 
the design of the heating installation.
The correct setting is normally undertaken by the 
heating engineer. The desired heating and set-back 
phases (e.g. at night) are automatically turned on and 
off using the integrated time programmes.
Weather compensators combined with thermostat valves 
are the most economical form of heating regulation.

Reducing the heating system

Reducing the room temperature at night and in your 
absence. This is best and most reliably realised using 
regulators with customisable time programmes.
At such times, set the room temperature approx. 5 °C 
lower than during full heating times. Reduction of more 
than 5 °C brings no additional energy saving, because 
then increased heating capacities would be needed for 
the next full heating period. Only for longer absences, 
e.g. holidays, is it worthwhile to further lower the 
temperatures. However, in winter, make sure that there 
is adequate frost protection.

Room temperature

Set the room temperature only as high as would be 
enough for your comfort level. An extra degree would 
mean increased energy consumption of about 6%.
Adjust the room temperature according to the purpose 
of use of the room. For example, normally, bedrooms or 
seldom used rooms are heated to 20 °C.

Setting the operating mode

In warmer seasons, when the apartment needs no 
heating, turn the heating to summer mode. The heating 
mode is then shut off, however, the device or the plant 
remains ready for operation for water heating.

Uniform heating

Often, in an apartment with central heating, only one 
room is heated. Through the encapsulation surfaces of 
this room, i.e. walls, doors, windows, roofs, floors, the 
unheated adjoining rooms are also heated in an 
uncontrolled manner, i.e. heat energy is lost 
inadvertently. The capacity of the radiator in this one 
heated room is obviously not enough for such an 
operating mode.
Consequently, the room cannot be heated adequately 
and an uncomfortable feeling of coolness prevails (the 
same effect is produced when doors between heated 
and unheated or partially heated rooms remain open).
This is incorrect saving: The heating is in operation and 
still the room temperature is not comfortably warm. 
Greater heating comfort and a more practical operating 

Notes on the installation and operation 3

GB

Summary of Contents for atmoCRAFT VK SERIES

Page 1: ...VK 654 9 1654 9 atmoCRAFT DE AT GB CZ SK HU PL HR SI SCG...

Page 2: ...For the owner VK 654 9 1654 9 Operating manual atmoCRAFT Gas heating boiler GB...

Page 3: ...by exceeding the temperature 13 4 8 5 Faults with the exhaust gas removal 13 4 8 6 Filling unit heating installation 14 4 9 Shut down 14 4 10 Frost protection 15 4 10 1 Frost protection function 15 4...

Page 4: ...4 Data badge The identification plate is included with the burner and should be mounted on the separation wall 2 Safety What to do in an emergency Danger If you smell gas risk of poisoning and explos...

Page 5: ...sufficiently heated Caution Risk of damage If there is a power cut or if the room temperature is set too low in individual rooms it cannot be ruled out that sections of the heating system are damaged...

Page 6: ...en by the heating engineer The desired heating and set back phases e g at night are automatically turned on and off using the integrated time programmes Weather compensators combined with thermostat v...

Page 7: ...0 C also lead to increased lime scale production Energy conscious use of water Energy conscious use of water can reduce your bills considerably For example taking a shower instead of a bath whereas ab...

Page 8: ...nk temperature in normal mode if a storage tank sensor is connected 6 button for moving backwards in the display for adjustment and troubleshooting by the engineer 7 Reset button for resetting certain...

Page 9: ...0 6 5 4 3 bar 1 Fig 4 4 Checking the filling pressure of the heating installation pressure gauge not included Check the filling pressure of the installation using the pressure gauge 1 not included For...

Page 10: ...ng feed temperature Note We recommend a setting of 60 C for economic and hygienic reasons e g Legionella Caution Danger of calcium deposit build up If your water hardness is more than 1 79 mol m3 10 d...

Page 11: ...m fitted to your heating system 4 5 2 Setting the flow temperature no controller connected 1 2 Fig 4 8 Feed temperature setting without heating controller If there is no external controller set the fl...

Page 12: ...tion of your boiler Press the i button 1 to activate the status displays The display 2 then shows the individual status codes e g S 4 for burner operation The table below explains the most important s...

Page 13: ...he heating system see Section 4 8 2 Is there an ignition problem see Section 4 8 3 Hot water operation no problem Heating does not start Is there a requirement for heating from the external controller...

Page 14: ...exceeding the temperature 1 2 Abb 4 14 Releasing after STB switch off Your boiler is equipped with a safety temperature limiter STB which automatically switches off the boiler if the temperature gets...

Page 15: ...However in exceptions the water quality might not be suitable for filling in the heating system heavily corrosive or extremely calciferous water In a case such as this you should please contact your a...

Page 16: ...he frost protection system cannot guarantee flow through the entire heating system 4 10 2 Frost protection by draining Another way to protect the heating system and the appliance from frost is to drai...

Page 17: ...ed as follows to perform the measurements Activate the chimney sweep mode by simultaneously pushing the buttons 6 and 7 on the DIA System The measurements should be taken at the earliest after 2 minut...

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