Trinity
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Installation and Operation Instructions
Ti Series
26
9.0 BOILER AND HEATING SYSTEMS PIPING
The heat exchanger of the Trinity boiler is designed to attain the highest level of heat transfer in a compact design. To
accomplish this, the heating water flows through a series of fin shaped tubes, designed to maximize the heat transfer area. To
maintain the efficient and reliable operation of the heat exchanger, and to avoid heat exchanger failure, it is critical to ensure the
rules and guidelines in this section are followed.
Failure to follow the instructions provided in this section will void the NTI warranty and may result in
property damage, fire, serious injury or death.
Boiler System Preparation
Prior to connecting plumbing to the boiler, flush the entire system to ensure it is free of sediment, flux, solder, scale, debris or
other impurities that may be harmful to the system and boiler.
During the assembly of the heating system, it is important to keep
the inside of the piping free of any debris including construction and copper dust, sand and dirt.
For retrofits, all system piping including radiators, must be cleand of all build-up including sludge and scale. All systems, old
and new, must be cleaned to remove flux, grease and carbon residue. NTI recommends cleaning the boiler system with “Fernox
F3 Cleaner”. For retrofit applications with heavy limescale and sludge deposits, a heavier duty cleaner may be required; NTI
recommends the use of “Fernox DS-40 System Cleaner”. For information on performing the cleaning, follow the instructions
included with the Fernox DS-40 System Cleaner. See Table 9-1 for list of recommended boiler cleaning products.
Failure to rid the heating system of the contaminants listed above will void your NTI warranty and may
result in premature heat exchanger failure and property damage.
Table 9-1 Boiler System Cleaners and Corrosion Inhibitors
Application
Fernox Product
NTI Part # Description
Boiler Water Treatment
F1 Protector
83448
Corrosion inhibitor.
Cleaner for new and old systems
F3 Cleaner
83449
Removes flux, grease and carbon residue.
Cleaner for Retrofits
DS-40 System Cleaner
83450
Removes heavy limescale and sludge deposits.
Boiler Water
Pressure -
The Trinity boiler is intended solely for use in pressurized closed loop heating systems operating with a minimum
pressure of 15 PSI at the boiler outlet. To obtain the minimum system design pressure, follow the piping diagrams illustrated in
this section.
Oxygen Elimination
- This boiler may only be installed in a pressurized closed-loop heating system, free of air (oxygen) and
other impurities. To avoid the presence of oxygen, ensure all of the air is removed from the system during commissioning via
strategically placed adequately sized air-removal devices, located throughout the heating system. See figures in this section
detailing the location of the primary air-removal device required for the boiler. Immediately repair any leaks in the system
plumbing to avoid the addition of make-up water; make-up water provides a source of oxygen and minerals that may lead to heat
exchanger failure. Failure to follow these instructions will result in poor performance, unnecessary wear of system components
and premature failure.
NOTICE:
The Trinity Ti boiler is not approved for operation in an “open system”, thus it cannot be used
for direct potable water heating or process heating of any kind.
Water Chemistry
– The installer of the Trinity Ti boiler must consider the condition of the water in the heating system. Ensure
the condition of the boiler water falls within the following parameters:
Water hardness – between 3 and 9 Grains/gal.
PH – between 7.5 and 9.5.
Treatment -
Boiler water must be treated with a corrosion inhibitor. Each Trinity Ti boiler is provided with a bottle of “Fernox
F1 Protector” corrosion inhibitor, adequate to treat a 26.4 gallon (100 liter) heating system to a minimum required concentration
of 0.5%. Systems with greater volume will require more inhibitor. For information on performing the treatment, follow the
instructions included with the Fernox F1 Protector. See Table 9-1 for a list of recommended boiler system cleaners and corrosion
inhibitors.
IMPORTANT
: To maintain protection, the level of corrosion inhibitor must be monitored periodically for the correct
concentration.
Anti-freeze
- For systems requiring freeze protection, use only inhibited propylene glycol, specially formulated for hydronic
heating systems; use of other types of antifreeze may be harmful to the system and will void the warranty. Note: the use of
glycol may reduce the usable output capacity of the boiler, thus requiring the unit to be “down-fired” by limiting the maximum
operating capacity and/or the maximum water temperature. NTI recommends against exceeding a 35% concentration of glycol.
