Trinity
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Installation and Operation Instructions
Tft Series
38
10.0 BOILER AND HEATING SYSTEM PIPING
The fire tube design of the Trinity Tft heat exchanger results in minimal head loss, however it must be
considered when sizing system piping and circulators. Furthermore, the low mass of the Tft heat exchanger
requires a minimum flow rate anytime the burner is operating. To maintain 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.
Water Quality
Water Quality is important to the proper operation and lifespan of the boiler; the information on water quality
provided in this document must be followed. Damage caused by failure to follow these requirements will not be
covered by the warranty.
During installation and yearly maintenance, the water quality must be checked. Common water quality heat
exchanger failures, are easily prevented when properly addressed.
Follow these system water best practices:
- Test system fill water and understand what you are putting into the system.
- Ensure that there is adequate air elimination in the system.
- Treat all boiler feed water as though it is hard water.
- Use chemical inhibitors on every job.
- Flush old and new systems with fresh clean water before commissioning a new boiler.
- Use magnetic dirt separators on systems containing large amounts of iron.
- Use Dirt Separators to remove debris from system water.
- Where possible, treat boiler feed water.
- Repair system leaks immediately to prevent oxygen (air) and untreated water from entering the system.
Proper equipment must be used to test the water. Digital meters are highly recommended because they can be
calibrated. The use of test strips is not recommended because they degrade over time and can be influenced by
many factors.
System Cleaning
– Existing and new heating systems must be cleaned with a hydronic system cleaner; see list
of recommended hydronic system cleaners below; equivalent products from other manufacturers may also be
used. System cleaner must be drained and thoroughly flushed with clean water to remove any residual
cleaner, prior to installing a new boiler. NEVER leave a system cleaner for longer than recommended by the
manufacturer of the cleaner; follow the instructions provided by the system cleaner manufacturer.
•
Noble Noburst Hydronic System Cleaner
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Fernox F3 Cleaner
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Rhomar Hydro-Solv 9100
•
Sentinel X400
Air Elimination
– A micro bubble air elimination device must be installed on every boiler installation.
Automatic air-vents alone are not an acceptable substitute for a micro bubble air elimination device. Below
are a few examples of acceptable devices.
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Spirovent
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Taco 4900 series
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Caleffi Discal
Automatic feed valves should not be left open indefinitely. In the event of a leak, an automatic feed valve
will continue to supply fresh untreated water into the heating system. Fresh water contains both oxygen and
added minerals, one or both of these could lead to scaling and/or corrosion of the heat exchanger.
