HKS lazar SF 21, Operation And Installation Manual

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Boiler model
SF 21 SF 41
Minimum chimney draft 1 Pa / 0,01 mbar 1 Pa / 0,01 mbar
Maximum chimney
draft
5 Pa / 0,05 mbar 5 Pa / 0,05 mbar
Chimney liner diameter Ø120 mm ÷ Ø130 mm Ø160 mm
Table 4. Guidelines regarding the heating circuits
9.4 Boiler's installation
Returning water cooled down below condensation point will result in accelerated corrosion.
The heating system must feature the necessary thermal protection to avoid that. Failure in
submission will nullify warranty!
The temperature of the returning water must not fall below 55 0 C. This condition must be satisfied
for performance of the warranty obligations and for the proper performance of the boiler. To
facilitate that you may apply a thermostatic valve set for 55ºC.
In case of Smart Fire boilers, desired temperature of the water returning to the boiler from the
heating installation is provided by Hydraulic Kit with thermostatic valve – see section 9.5. The
Hydraulic Kit is mounted on back side of the boiler's heat exchanger chassis and it is part of Smart
Fire boiler equipment.
The installation must comply with the regulations in force, the industry standards and the
construction principles. Follow the installation sketches on the fig. 12 below. Other, viable from the
point of view of hydraulics layouts are acceptable.
Smart Fire Manual wer. 05/07/2012/EN/SL V2.0
HKS LAZAR str.27