Logica - Boilers
Wood fired boilers with manual loading
Logica

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Description of Logica

Logica is steel water boiler designed for combustion of wood and coal. The boilers with output of 20 kW can be used for heating of small buildings such as family houses, lodging-houses, motels, workshops, etc. The boiler’s output could reach 460 kW and could be suitable for heating of buildings up to 5 000 m2 of area like: shops, schools, apartment houses, etc. Boilers over 70 kW have in standard equipment fan and digital steering – those boilers are forced draft system boilers.
Recommended fuel :

- wood for heating systems (14-18 MJ/kg)
- stone coal

Fuel

LOGICA boilers are fired by cobble coal Ko II, Ko, nut coal O I, II, pea coal Gk and fine coal MI. Coal can be substituted by firewood, however in such case the manufacturer cannot guarantee the rated boiler power.

Features

· Possibility of combustion of cheapest fuel like: wood and coal
· Big loading chamber and comfortable loading doors
· 4 pass structure and ceramics archives good efficiency and working time about 6-8 hours on one loading of the wood and 14-20 hours on one portion of coal
· Mechanical plate system enables easy clean of the combustion chamber

Logica contains:

3pass boiler made from steel (5/6 mm ) with iron coast grill in combustion chamber
Outer Jacket with insulation
Digital control panel with pump steering
Optional -- heat exchanger (spiral) EN 303-5
Combustion chamber with ceramics

Mutli injection system of hot air (14-80 kW) , Mono air inlet system (80-460 kW)

TECHNICAL DATA

Power	A height	B width	C depth	Flue gas outlet (mm)	Water capacity (l)	Air inlet system	Weight kg	Max pressure	Pressure work
14-20 kW	1000	430	1000	180	80	multi	300	4 bar	2,5 bar
20-27 kW	1000	480	1000	180	95	multi	380	4 bar	2,5 ba
30-38 kW	1270	530	1000	180	110	multi	420	4 bar	2,5 ba
40-48 kW	1300	530	1100	180	125	multi	480	4 bar	2,5 ba
50-58 kW	1450	630	1100	180	140	multi	550	4 bar	2,5 ba
70-78 kW	1570	700	1460	200	180	multi	600	4 bar	2,5 ba
92,8 kW	1528	732	1190	220	241	mono	640	4,5 bar	3 bar
116 kW	1710	870	1360	220	285	mono	860	4,5 bar	3 bar
150 kW	1880	880	1500	220	356	mono	960	4,5 bar	3 bar
185 kW	2090	880	1500	220	413	mono	1030	4,5 bar	3 bar
230 kW	2090	880	1640	220	463	mono	1190	4,5 bar	3 bar
348 kW	2200	1100	2430	300	847	mono	2200	4,5 bar	3 bar

Logica models 14-78 kW

Logica models 92,8-348 kW

Boiler with lower-upped furnace and thermal insulation; standard control panel connected to the fan. The boiler’s body is built from welded certified boiler steel sheets with a fixed water grate with a movable cast iron grate in the combustion chamber. The convector part is made of specially formed ducts with washout holes on top and bottom, partially laid with chamotte. Unique air supply solution, where the air is pumped through numerous nozzles inside the combustion chamber.
The boiler is equipped with choke valves for chimney draught control.
Depending on the version, the boiler comes with a room thermostat and cleaning and maintenance tools.
In standard versions, movable grate and blowdown connection for water pumping and emptying is located on the right side of the boiler.
It is recommended to clean the grate before each fuel feeding.
To economize fuel consumption and obtain the power parameters and heat output indicated by the manufacturer, the combustion chambers and convection ducts must be kept clean.
In particular, ash and slag must be removed from the combustion chamber grate and walls.
The boiler should be cleaned with the choke valve fully open, when the thickness of tarnish on flue walls exceeds 1.0 – 2.0 mm, however at least once a month. The feeding chamber should be cleaned through the upper cleaning hole. In order to clean convection ducts, open the upper washout hole, remove the wool and chamotte bricks, clean carbon deposit and soot with a steel brush and remove through the lower washout hole. Make sure that the lower washout hole is tightly closed.
The chimney should be checked and cleaned, if necessary, at least once a year.
The door sealing cord, lock and hinges should be checked regularly, at least every 14 days. Any defects should be immediately repaired.
Sealant and sealing cord should be replaced regularly.

Boiler installation

The scope of delivery:
Boiler insulated with mineral wool and steel glazed coating, movable grate lever, control unit box, fan and analogue room thermostat.
Boiler should be installed on a base at least 5 cm above the floor level. The load bearing capacity of the floor slab should be calculated based on boiler weight and the base should be leveled. Boiler’s front should face the window so that the distance from the opposite boiler room wall is at least 0.5 m greater than boiler length and not less than 2 m. The distance between the back of the boiler and the boiler room wall should be at least 0.7 m.
Boiler room, where the boiler is located should meet the requirements of Polish Standard PN-87/B-02411.

Pipe connectionThe figure presents an open system central heating installation with upper division.
The installation must meet the requirements of Polish Standard PN-91/B-02413 on protection of water open system heating devices and open system storage tanks.

If there is any fuel left, the movable grate lever must not be moved! Only when the fuel has burned out, the grate may be moved to remove the ash, then it is possible to move the embers and refuel (with coal or wood). If there is no self-ignition, the boiler should be fired up according to the instruction.

Operating the boiler

Before commissioning, the boiler room and installation should be inspected, i.e., the installation and boiler fittings should be checked as well as integrity of flue pipes and circulating pumps, etc. The chimney must be heated before commissioning!
Additional information on the control unit usage has been enclosed to the instruction manual.
Firing the boiler
Depending on the type of fuel, the upper or lower furnace can be used. If the lower furnace is used, the boiler works with greater power.
Fine coal can be used in upper and lower furnace. Load the fuel so that the upper nozzles on the sides of combustion chamber are not covered and fire up from the top with paper and wood. Close the door, set the desired temperature on the control unit and press “start”. If fine coal is used, the loading door should not be opened to reload until the entire coal load has been burned.
If the lower furnace is used with nut or fine coal or wood, fire up a small portion of fuel through the lower door over the grate. Then move the burning fuel (wood, paper) inside the boiler into the combustion chamber with a special poker. Load fuel through the loading door, close it, set the temperature on the control unit and press “start”.
Lower furnace should also be used in emergency mode, e.g.: if there is power shortage or the control unit has broken down. In such case, the grate door should be left open to allow for natural chimney draught. The control unit should be unplugged so that the fan does not start working and blowing the combustion gas inside the boiler room after the power is back on.
The ash pan is equipped with dampers for air blow regulation. The dampers should be closed if the upper furnace is used, and opened, if the lower furnace is used.

Up to 460 kW capacity

460 kW

230 kW

Viessmann control panel

RK 2001A Regulator

master switch
boiler temperature indicator
boiler fire-up mode indicator
boiler overheating indicator
room thermostat indicator
boiler thermostat knob
circulating pump indicator
fuel shortage indicator
room thermostat knob
test switch

1. REGULATOR CHAR1783941229.phpERISTIC

The regulator is to destined for boiler temperature setting-up. The regulator continues water temperature measurement then shows it on small screen and operates the circulating pump as well.

The regulator is also equipped with room thermostat to assure the precise teperature regulation in the heated room space.

2. REGULATOR SET-UP

Before feeding plug connection into the socket (230V/50Hz) it should be decided if regulator works with circulating pump or not. If first option is chosen the regulator should be taken of the boiler frame and after opening, properly connect the pump power lead to the place named “CENTRAL HEATING PUMP” .

Before regulator insertion into the casing it should be assured that the temperature sensor has not came out of the measurement casing.

Warning! Before regulator setting up it should be checked out if the wiring system is correctly connected to the ground.

Warning! A fan and pump of max. 250W can be connected to one regulator.

3. REGULATOR SERVICE

Connecting strip as well as the safety device socked is placed on the regulator back wall. On the same wall there is also placed room thermostat socked and time regulation handwheels.

4.REGULATOR WORKING Description of Logica

Regulator's work is based on suitable controlling of lhe fan and heating system circulating pump to achieve assigned boiler and room temperature. After regulator switching on or after switching off the boiler overheating indicator, the regulator begins boiler buring; it is shown by green indicator.

The burning process is finished if boiler temperature achieves assigned value and green indicator will switch off.

If boiler temperature does not achieve 65°C during 2 hours of boiler working, the regulator will switch on the fan and shows fuel shortage indicator.

During its work regulator shows an actual boiler temperature and controls fan

speed as below:

> If during ot the burning process boiler temperature is lower than 60°C

the fan works in 40 – 100% ; if temperature is higher than 6O°C the fan

works in 100% of its power

> If boiler temperature during its normal work is lower than assigned value more

than 10°C then fan works in 100% of its power

>If boiler temperature during its normal work is lower than assigned value less

than 10°C then regulator reduce the fan speed but not 1ess than 40% of its

power

>If boiler temperature is higher or equal of assigned thermostat temperature the

fart switches off

> The tan will switch on again when boiler temperature gets down about 5°C of

assigned value

>To avoid gasses accumulation during boiler outage, the regulator makes 5secunds blows through tne boiler every 1÷9 minute. The blows can be set-up after regulator switching on when you can see (P1... .P9, P-) on the regulator sereen; pressing (P-) you will switch off the blows.

It circulating pump works:

>during biler burning , until boiler achieves 65°C, pump is switched oft

> if, boiler temperature is higher tnan 65°C pump starts to work and works until

boiler temperature gets down to 60°C to avoid excessive boiler pre-coollng

> if, during boiler operation the temperature temporarily gets down to 60°C the

pumpstarts to work again after temperature achieves 65°C

FUEL SHORTAGE

If boiler temperature gets down under 65°C and it is continued by 30 min., then regulator switch off the fan and switch on the fuel shortage indicator.

In case of regulation repeated switching off, you should:

>fill up the boiler with wood or to burn the boiler again if necessary

> turn the thermostat handweel to the left as much as possible

> wait until the fuel shortage indicator starts to blink

> set-up boiler temperature using of thermostat handwheel

BOILER OVERHEATING

If boiler temperature achieves over 95°C, the regulator switches off the fan and switch on the boiler overheating indicator. Then you should:

> wait until boiler temperaturegets down

>remove boiler overheating reason