Other Important Information - Bosch KBR16-3 Installation And Service Instructions Manual

Water Chemistry Guidelines
NOTICE: Insufficient antifreeze can accelerate
corrosion.
▶ Follow manufacturer's instructions on antifreeze
concentration.
▶ Frost protection level has to be checked annually
during the regular scheduled maintenance of the
condensing boiler.
NOTICE: System damage!
▶ It is the installer's responsibility to ensure that the
heating system is compatible with the boiler type and
size installed.
▶ pH-value of the heating water to be kept between 7
and 8.5.
The following anti-freeze fluids and concentrations have been approved:
Chemical Name Concentration
Nalco (Varidos) FSK 22 - 55 %
Fernox Alphi 11 Refer to manufacturer's instructions
Intercool NFP-50 AA 0 - 39 %
Antifrogen N Refer to manufacturer's instructions
NoBurst AL 0 - 55 %
Table 5 Anti-freeze
Corrosion inhibitors
The following anti-corrosion agents are approved:
Chemical Name Concentration
Fernox F1 Refer to manufacturer's instructions
Nalco 77381 1 - 2 %
Sentinel X 100 1.1 %
Table 6 Corrosion inhibitors
▶ System fluid pH must be maintained between 7 and 8.5 to prevent
system damage.
▶ Use only untreated water to fill the system.
▶ Do not use TSP (tri-sodium phosphate).
▶ Do not use fill water treated with salt bedding type exchangers (ion
exchanger).
▶ Never introduce non-approved boiler treatment or similar additives.
▶ Only use fill water with a hardness below 7 grains.
▶ Filling with chlorinated water is acceptable if chlorine levels are
below 100 ppm.
▶ Do not use inhibitors or other additives unless listed in this
document.
▶ Consult a local water treatment specialist for recommendations if
any of the above is outside the stated ranges.
▶ When using oxygen permeable PEX, the system must be separated
from the boiler by a heat exchanger.
▶ A correctly sized and working expansion vessel must be installed.
▶ Do not exceed the maximum permissible fl ow rate through the
boiler. Excessive flow can cause erosion damage to the heat
exchanger.
▶ Eliminate System Leaks
Continuous addition of make-up water will constantly add oxygen to
the system and lead to corrosion. All system leaks must be repaired.
Boiler sealer
This boiler is not approved for use with boiler sealer.
Greenstar FS
LPG
To protect the appliance against high pressure (ANSI/Z223.1/NFPA54
(National fuel gas code) or CAN/CSA B 149.1 (Natural Gas and Propane
installation code)):
▶ Install a pressure regulator with a safety valve.
6.1.2

Other important information

• The installation of this boiler must comply with all national and local
code and regulations.
• Only operate this boiler with the combined air/flue system
specifically designed and approved for it.
• Only use approved venting systems per the manufacturer's
instructions.
• Do not dispose of untreated boiler condensate in septic systems.
• Inspect the sewer pipes for suitability before disposing of untreated
boiler condensate into them.
• Verify with the local authority that disposing of untreated boiler
condensate into public sewer systems is permitted.
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