Centrometal Bio-Tec 25 Technical Manual - Page 12

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Connection to the closed central heating system

The boiler has to be connected to the one or more CAS water accumulators,

depending of its power. It is recommended to connect 50 liters water accumulation

to each 1 kW boiler power (i.e. for the 45 kW boiler minimal water accumulation

should be 2250 liters). The boiler should not be used without being connected to the

water accumulator. It can be connected to the CAS water accumulator exclusively

through an 3-way thermic valve ESBE VTC 512 (maintains minimum temperature

of return water into the boiler above 60°C), VTC 531 (maintains minimum

temperature of return water into the boiler above 60°C), LTC 100 (maintains

minimum temperature of return water into the boiler above 60°C) or Laddomat 21

(maintains minimum temperature of return water into the boiler above 63°C).

Scheme 2. - Closed central heating system with 2 water accumulators

1 - Boiler Bio-Tec

2 - "CAS" water accumulator

3 - 3-way thermic valve ESBE VTC 512 (maintains

minimum temperature of return water into the boiler

above 60°C), VTC 531 (maintains minimum

temperature of return water into the boiler above 60°C),

LTC 141 (maintains minimum temperature of return

water into the boiler above 60°C) or Laddomat 21

(maintains minimum temperature of return water into

the boiler above 63°C)

4 - Manual 3-way mixing valve

5 - Room thermostat (included into basic delivery)

6 - Heating circuit

7 - Expansion vessel for closed systems

(approx. 10% of the total volume of installation)

8 - Sanitary water accumulator

(SKB-Digi/LKB-Digi/TB/STEB)

9 - Pump 1-boiler pump

10 - Pump 2-heating pump

11 - Pump 3-hot sanitary water pump

12 - Thermal safety valve

13 - Safety-airvent unit

bar

Technical manual Bio-Tec

- pieces of the lower refractory stone have to be situated into the deposits on the

lower wall of the combustion chamber (DS-page 3).

- turbulators (TU-page 29) have to be fixed inside the flue exhaust tubes

(DC-page 3).

- air damper (PZ-page 3) for secondary and primary air.

- flue gas tube is good fixed, tight and thermically insulated.

- if the boiler is connected to the electric power net.

- if movable elements-two lids of bottom openings of the flue gas chamber DO and

flue gas tube cleaning lever.

Remove all objects like documents/manuals eventually laying inside the boiler.

Firing has to be performed according to the instructions described in this manual

(See points 6.0 to 6.4) and Technical manual ''Digital boiler regulation Bio-Tec''.

If you are sure that energy from boiler will be consumed, made firing up for one filling

of the firebox.

IGNITION PHASE AND FIRST FUEL CHARGING:

- Open upper boiler door (and close bottom if they open) (see Image 7)

- Put fine chopped wood to the upper chamber, on refractory stone (chamotte) over

the burner nozzle so that the nozzle is not obstructed, then put crumpled paper

for ignition and fill the top chamber with fuel (split logs). (see Image 7, Image 8)

- Close upper boiler door. (see image 7)

- Turn the MAIN SWITCH on. (see Point 7.0)

- Push the button START (the LED diode flutters). (see Point 7.0)

- Open the middle door and ignite paper. (see Image 7)

- Couple minutes after fine chopped wood starts burning, close the middle door.

(see Image 7)

- Push the button START (the LED diode lights). (see Point 7.0)

- (Only for Bio-Tec 25) place the button RP (see page 3) into position " "

- (Only for Bio-Tec 25) leave the button RP (see page 3) in position " " at least 1

hour or longest to the next charge with wood and then restore it in the left position.

The above actions are for ignition of the boiler from cold state (without glow).

These measures should be implemented always when we don't have, or don't

have enough glow, and when we will load the wood.

Technical manual Bio-Tec

Boiler start up