HTP MC120 - Manual (Page 42)

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LP-171 Rev. 4.10.14
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 heater 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 heater. 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 THE LOCATION OF CONDENSATE PIPING
This is a high efficiency heater, and therefore produces condensate: a by-product of the combustion process. A condensate collection
system with an internal float switch monitors condensate level to prevent it from backing up into the combustion system. There is a ¾”
socket connection provided to connect the outlet of the collection system to a drain or condensate pump (kit p/n 554200 available from
HTP). If the heater condensate outlet is lower than the drain, you must use a condensate removal pump.
NOTE: The installer should fill the condensate trap with tap water prior to operating the heater.
NOTE:
The use of ½” PVC or CPVC pipe are acceptable materials for condensate piping. Steel, brass, copper or other materials will be
subject to corrosion or deterioration. However, use materials approved by the authority having jurisdiction.
In the absence of other authority, PVC and CPVC pipe must comply with ASTM D1785 or D2845. Cement and primer must comply with
ASME D2564 or F493. For Canada, use CSA or ULC certified PVC or CPVC pipe, fittings, and cement. If pipe is used, deburr and
chamfer pipe to allow proper mating to the drainage assembly.
NOTE: To allow for proper drainage on long horizontal runs, a second line vent may be required and tubing size may need to increase
to 1”. Support of the condensate line may be necessary to avoid blockage of the condensate flow. Failure to add a second vacuum
break could result in condensate backup, improper heater operation, and nuisance shutdowns.
The condensate trap assembly MUST BE PROPERLY INSTALLED when operating the heater. Operating the heater without the
condensate trap assembly will cause flue gases to leak and result in serious personal injury or death.
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 heater 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 (p/n N1100). The neutralizer
kit connects to the drain system and contains limestone chips that neutralize the pH level of the water vapor. The neutralizer kit should
be checked annually and the limestone chips replenished if necessary. When replacing the limestone chips, take care to ensure chips
are
no smaller than ½” to avoid blockage in condensate piping (for piping details, refer to condensate neutralizer installation instruction.)