Kalvis 6 MPP, User Manual

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KALVIS – 6MPP      2009.05.18 

Boiler premises have to be well ventilated. 
Recommenmded fuel humidity not greater than15-20 %.  

Notice.

 At the start of operation, until there is no soot layer on the 

internal boiler surfaces, during combustion a water condensate may form, 
giving the impression that boiler is not tight. Water vapour condensate will 
disappear when water temperature in the boiler reaches 70-80°C. It is 
recommended to keep water temperature in the boiler as high as possible. 
When water temperature  is below 55°C condensate will form intensely and 
may cause acorrosion. In order to avoid low temperature corrosion, it is 
recommneded to have an accumulation tank installed into a heating system, 
in order to fire boiler at maximum output.. 

3c fig. 

 
Requirements: 

•

Chimney draught has to be no smaller than 22 Pa; 

5.4.

Mounting and adjusting the draught adjuster 

•

Chimney hole‘s cross section should be not less than 120 x 270 mm; 

Draught adjusters manufactured by Swedish ESBE C20/25 with 

protection from boiler overheating or without it are used. Adjuster is turned 
into a socket, scotch tape is used for sealing, Attach chain to air supply 
damper. 

When boiler heats up to 70°C, adjust adjusters handle to position "4" and 

shorten the chain so that, air supply damper is closed. Turning adjuster to 
the correspondent position sets desired temperature. Position "6" 
corresponds to 90°C. Temperature increment between positions is 10°C. 

•

Boiler needs a separate hole for the chimney connection. No other 
connections through that hole are allowed 

•

If chimney is connected with additional elbow, it‘s cross section has to 
be not less than that of the boiler smoke pipe, and bending radii not less 
than 100mm; 

•

Pipe from the smoke pipe to chimney has to be not longer than 1,5 m 
and lean upwards toward chimney; 

•

Joints have to be well sealed; 

•

Chimney hole has to be well cleaned. 

Necessary to know that: 

5.5.

Boiler cleaning 

(1 fig.)

To ensure optimum boiler performance slag has to be removed from the 

burner and ash has to be cleaned from the internal boiler’s surfaces and ash 
tray.. 

Intervals between boiler cleaning depend on fuel type and quality 

(especially humidity), combustion intensity, chimney draught, etc. It is 
recommneded to clean internal surfaces when soot layer on heat 
exchangiong surfaces is no greater than 3mm. Remove service covers (p.4), 
dampers (p.3; p.10) and carefully clean boiler surfaces.  

Use special chemicals for hard residue cleaning. 
Clean chimney at least once a year before heating season.  

•

Smoke continues to cool in the chimney, vapor condenses on the 
chimney walls, especially in the unheated loft and on the outside of the 
building; 

•

Condensate acids and erosion may destroy the chimney in few years; 

•

Uncleaned soot in the chimney may self-combust and become the cause 
of fire. 

Recommended: 

•

Mount an insert into the chimney. Well mounted insert protects chimney 
from condensate influence; 

5.6.

Troubleshooting  

•

Insert should not significantly decrease the cross section of the chimney; 

•

Insert parts should be well joined together (no soldering); 

Boiler is protected against excessive pressure by protection valve and 
expansion tank mounted in the system. 

•

Condensate collector and drainage should be arranged in the bottom; 

•

An incombustible material should insulate the cavity between the insert 
and chimney. Top slit should be hermetically sealed; 

•

In the unheated loft an incombustible material should insulate chimney.