36 | Installation
Copyright (optional information)6 720 643 068 (2011/06)
Gravity heating systems
B Connect the appliance to the existing piping system via
a low-loss header with a sludge separator.
Galvanized radiators or pipes.
To prevent gas formation:
B Do not use galvanized radiators or pipes.
Use of a room temperature control
B Do not install thermostatic valves on radiators in the
primary room.
Anti-freeze
The following anti-freeze fluids are approved:
• Nalco (Varidos) FSK
• Alphi 11
• Glythermin NF
• Antifrogen N
• Intercool NFP-50 AA
• Tyfocor L
• NoBurst AL
The following concentrations are approved:
Corrosion inhibitors
The following anti-corrosion agents are approved:
Boiler sealer
This boiler is not approved for use with boiler sealer.
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)):
B Install a pressure regulator with a safety valve.
5.1.2 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.
NOTICE: Insufficient antifreeze can
accelerate corrosion.
B Follow manufacturer's instructions on
antifreeze concentration.
B Frost protection level has to be checked
annually during the regular scheduled
maintenance of the condensing boiler.
NOTICE: System damage!
B It is the installer's responsibility to ensure
that the heating system is compatible with
the boiler type and size installed.
B pH-value of the heating water to be kept in
the given ranges (Æ Tab. 13, page 35).
Designation Concentration
Nalco (Varidos) FSK 22 - 55 %
Glythermin NF 20 - 62 %
Intercool NFP-50 AA
0 - 39 %
Tyfocor L
25 - 80 %
NoBurst AL
0 - 55 %
Tab. 15 Anti-freeze
Designation Concentration
Nalco 77381 1 - 2 %
Sentinel X 100 1.1 %
Copal 1 %
Tab. 16 Corrosion inhibitors
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