Return Lift; Combination With Storage Tank; Chimney Connection/Chimney System - Froling SP Dual compact Operating Instructions Manual

3.6 Return lift

3.7 Combination with storage tank

3.8 Chimney connection/chimney system

B1500423_en | Operating instructions Dual fuel boiler SP Dual compact
If the hot water return temperature is below the minimum return temperature, some of the
hot water outfeed will be mixed in.
NOTICE
Risk of dropping below dew point/condensation formation if operated without return
temperature control.
Condensation water forms an aggressive condensate when combined with
combustion residue, leading to damage to the boiler.
Take the following precautions:
r Regulations stipulate the use of a return temperature control.
Ä The minimum return temperature is 60 °C. We recommend fitting some kind of
control device (e.g. thermometer).
You can find more detailed information about storage tank design in the boiler assembly
instructions.
NOTICE! See "Design Information" section in the assembly instructions SP Dual
compact
EN 303-5 specifies that the entire flue gas system must be designed to prevent, wherever
possible, damage caused by seepage, insufficient feed pressure and condensation.
Please note in this respect that flue gas temperatures lower than 160K above room
temperature can occur in the permitted operating range of the boiler.
NOTICE! Please see the technical data contained in the assembly instructions for
further information about standards and regulations as well as the flue gas
temperatures when clean and the other flue gas values!
Notes for operating a heating system | 3
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