Operating instructions

Return lift
If the hot water return is below the minimum return temperature, some of the hot water
outfeed will be mixed in.
CAUTION
Risk of dropping below dew point/condensation formation if operated without re‐
turn lift.
Condensation water forms an aggressive condensate when combined with com‐
bustion residue, leading to damage to the boiler.
Take the following precautions:
❒ Regulations stipulate the use of a return lift.
➥ The minimum return temperature is 65 °C. We recommend fitting some
kind of control device (e.g. thermometer).
2.5.4 Use with storage tank
NOTICE
In principle it is not necessary to use a storage tank for the system to run smooth‐
ly. However we recommend that you use the system with a storage tank, as this
ensures a continuous supply of fuel in the ideal output range of the boiler.
For the correct dimensions of the storage tank and the line insulation (in accordance
with ÖNORM M 7510 or guideline UZ37) please consult your installer or Froling.
⇨ See "Addresses" [page 46]
2
Safety
Design information
14 Froling GesmbH | A-4710 Grieskirchen, Industriestraße 12 | www.froeling.com