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LP- 428 REV. 9.2.14
NOTE: SEE ADDITIONAL REQUIREMENTS FOR MASSACHUSETTS IN THE BACK OF THIS MANUAL.
The building owner is responsible for keeping the exhaust and intake terminations free of snow, ice, or other potential blockages, as
well as scheduling routine maintenance. Failure to keep the vent piping terminations clear and properly maintain the boiler could result
in property damage, severe personal injury, or death.
For each floor containing bedroom(s), a carbon monoxide detector and alarm shall be placed in the living area outside the bedrooms,
as well as in the room that houses the boiler. Detectors and alarms shall comply with NFPA 720 (latest edition). Failure to comply with
requirements for detectors and alarms could result in property damage, severe personal injury, or death.
DETERMINE LOCATION OF CONDENSATE PIPING
This boiler is a high efficiency appliance, and therefore produces condensate: a by-product of the combustion process. A condensate
collection system with an internal float switch monitors the condensate level to prevent it from backing up into the combustion system.
There is a ¾” sweat connection provided to connect the outlet of the collection system to a drain or condensate pump (See Table 6 for
approved condensate piping material).
APPROVED PLASTIC CONDENSATE PIPING MATERIAL
STANDARDS FOR INSTALLATION IN:
Table 6 – Approved Plastic Condensate Piping Material
NOTE: Check with your local gas company to determine if combustion condensate disposal is permitted in your area. In the state of
Massachusetts, condensate must be neutralized before entering a drain.
CONDENSATE NEUTRALIZATION
Condensate from the boiler is slightly acidic with a pH of 3.2 - 4.5. To avoid long term damage to the drainage system and to meet local
code requirements, HTP recommends neutralizing the condensate with a Condensate Neutralizer Kit (Part # 7350P-611). The
neutralizer kit connects to the drain system and contains marble chips that neutralize the pH level of the water vapor. The neutralizer kit
should be checked annually and the marble chips replenished if necessary. When replacing the marble chips, take care to ensure chips
are no smaller than ½” to avoid blockage in condensate piping (refer to Figure 12 for piping of the condensate neutralizer.)
It is very important that the condensate piping be no smaller than ¾”. You must use a tee at the condensate connection with a branch
vertically up and open to the atmosphere, so as not to cause a vacuum that could obstruct the flow of condensate from the boiler. To
prevent sagging and maintain pitch, condensate piping should be supported with pipe supports.
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