Munchkin Gas-Fired Hot Water Boiler Specifications download pdf (Page 44)

LP-185 Rev. 3.2.15

2. DETERMINE INTAKE PIPE LOCATION

a. Provide 1 foot clearance from the bottom of the intake pipe and the level of maximum snow accumulation. Snow removal

may be necessary to maintain clearances.

b. Do not locate intake pipe in a parking area where machinery may damage the pipe.

c. When venting with a two pipe system, maximum distance between exhaust vent and intake pipe is 6 feet (1.8 m). Minimum

distance between exhaust vent and intake pipe on single boiler is 10” (0.255 m) center-to-center. Minimum distance between

exhaust vents and intake pipes on multiple boilers is 10” (0.255 m) center-to-center.

NOTE: Due to potential moisture build-up, sidewall venting may not be the preferred venting option. To save time and cost, carefully

consider venting installation and location.

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.

3. Determine location of condensate piping:

This is a high efficiency boiler, and therefore produces condensate: a by-product of the combustion process. Condensate is nothing

more than water vapor derived from combustion products, and is similar to that of an automobile when it is initially started.

It is very important that the condensate line is sloped away from the boiler to a suitable drain. If the boiler condensate outlet is lower

than the drain, a condensate pump (kit p/n 554200 available from HTP) must be used.

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 boiler operation, and nuisance shutdowns.

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.

4. 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 (p/n 7450P-218). 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.)

If using a condensate pump, select one approved for use with condensing boilers and furnaces. The pump should have an overflow

switch to prevent property damage from condensate spillage.

It is very important that the condensate piping be no smaller than ¾”. To prevent sagging and maintain pitch, condensate piping should

be supported with pipe supports, and pitched ¼” per foot to allow for proper drainage.

The condensate line must remain unobstructed, allowing free flow of condensate. If condensate freezes in the line, or if line is

obstructed in any other manner, condensate can exit from the tee, resulting in potential water damage to property.

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Munchkin Gas-Fired Hot Water Boiler Specifications Page 44

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