Unical PK 300 X 2S Instruction Manual download pdf (Page 8)

Technical features and dimensions

2.2 - MAIN COMPONENTS AND

FUNCTIONING

The PKX boilers are built with a blind furnace, in which the

burner's central flame travels towards the bottom and then is

distributed in the flue pipes; at the terminal part of the pipes

the combustion gas is collected in the flue chamber and then

sent to the chimney. During burner operation, within the boi-

ler's output range, the combustion chamber is always under

positive pressure.

For this pressure value refer to the table on page 8, to the

column "Heating losses flue side".

Rmt

Rbt

1. Furnace

2. Flue pipes with flue deflectors

3. Door complete with flame control light

4. Smoke chamber

5. Body insultation

-- Control panel (not visible)

M System flow

Rbt Low temperature system return

Rmt Average temperature system return

Ve Expansion vessel

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Unical PK 300 X 2S Instruction Manual Page 8