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Notes on installation and operation
The following anti-freeze fluids and concentrations have been approved:
Chemical Name
Nalco (Varidos) FSK
Fernox Alphi 11
Intercool NFP-50 AA
Antifrogen N
NoBurst AL
Table 11 Anti-freeze
Corrosion inhibitors
The following anti-corrosion agents are approved:
Chemical Name
Fernox F1
Nalco 77381
Sentinel X 100
Table 12 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 leaks in the system
Continually topping up the system constantly adds oxygen to the
heating water, causing corrosion damage. All system leaks must be
repaired.
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)):
▶ Install a pressure regulator with a safety valve.
30
Concentration
22 - 55 %
Observe manufacturer's
instructions
0 - 39 %
Observe manufacturer's
instructions
0 - 55 %
Concentration
Observe manufacturer's
instructions
1 - 2 %
1.1 %
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.
• Use only 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 in them.
• Verify with the local authority that disposing of untreated boiler
condensate into public sewer systems is permitted.
6.1.3
Water Supply Pressure
The connection pressure of the water supply must be between 4.35 psi
and 150 psi.
▶ If necessary, install a pressure reducing valve.
For optimum performance it is recommended to keep pressure between
20 to 30 psi.
NOTICE:
Damage due to overpressure.
Non-return, backflow prevention devices (including those associated
with water meters) fitted to the incoming water supply can cause a
pressure build up which could damage the boiler and other household
appliances.
▶ Where the incoming water supply has a non-return, backflow
prevention vavle installed, a mini expansion vessel should be
connected to the water supply pipe between the non-return valve and
the boiler.
Greenstar – 6721822579 (2020/03)
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