Kozlusan Propel 25, Owner'S Manual

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7 | P a g e
4. By the time the exhaust air reaches the flue, most of its thermal energy has been absorbed. The final
temperature of the escaping flue gas is less than 175
°
C.
Fluid Flow through the Heating system
1. Kozlusan heating systems recommends a mixture of water and propylene glycol as a heat transfer
fluid. Glycol is a non-toxic solution that works like the antifreeze in your car to prevent corrosion and
freezing.
2. A pump pushes fluid around the heat transfer jacket which absorbs heat from the combustion gases.
The fluid exits the internal manifold at about 80-85
º
C.
3. The fluid flows past an aquastat (water thermostat) that regulates the burn rate of the heating system
in conjunction with the flue gas temperature sensor that measure the temperature in the flue. This
information is used to determine the amount of air and fuel being used to ensure efficient heat transfer
and to ensure the fan does not simply blow the heat up the flue. The heated fluid is used to transfers
the heated fluid to your home system where it provides warmth to your home, garage, basement and
other structures; preheats your domestic hot water; heats your pool; and/or melts snow on your
driveway.
4. Having transferred the heat to the home system, the fluid exits the external heat exchanger and
repeats its path through the internal manifold.