Laars NEOTHERM NTH Installation And Operation Instructions Manual

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Laars NEOTHERM NTH Installation And Operation Instructions Manual Manual pdf 13 page image

NeoTherm Boiler Page 13A condensate drain trap is built into NeoTherm.Connect a 3/4" PVC pipe between the drainconnection and a floor drain (or condensate pump if afloor drain is not accessible).The condensate drain must be installed so as toprevent accumulation of condensate. When acondensate pump is not used, the tubing mustcontinuously slope downward toward the drain with nospiraling.Consult local codes for disposal method.CautionCondensate is mildly acidic (pH.....5), and may harmsome floor drains and/or pipes, particularly those thatare metal. Ensure that the drain, drainpipe, andanything that will come in contact with thecondensate can withstand the acidity, or neutralizethe condensate before disposal. Damage caused byfailure to install a neutralizer kit or to adequatelytreat condensate will not be the manufacturer’sresponsibility.2.3 Locating Vent & Combustion AirTerminals2.3.1 Side Wall Vent TerminalThe appropriate Laars side wall vent terminal mustbe used, and is listed in this installation and operationmanual. The terminal must be located in accordancewith ANSI Z223.1/NFPA 54 and applicable local codes.In Canada, the installation must be in accordance withCSA B149.1 or .2 and local applicable codes. Considerthe following when installing the terminal:1. Figure 11 shows the requirements for mechanicalvent terminal clearances for the U.S. and Canada.2. Vent terminals for condensing appliances orappliances with condensing vents are notpermitted to terminate above a public walkway, orover an area where condensate or vapor couldcreate a nuisance or hazard.3. Locate the vent terminal so that vent gases cannotbe drawn into air conditioning system inlets.4. Locate the vent terminal so that vent gases cannotenter the building through doors, windows, gravityinlets or other openings. Whenever possible, avoidlocations under windows or near doors.5. Locate the vent terminal so that it cannot beblocked by snow. The installer may determinethat a vent terminal must be higher than theminimum shown in codes, depending upon localconditions.6. Locate the terminal so the vent exhaust does notsettle on building surfaces or other nearby objects.Vent products may damage surfaces or objects.7. If the boiler or water heater uses ductedcombustion air from an intake terminal located onthe same wall (see Figure 12 for proper spacingand orientation).2.3.2 Side Wall Combustion Air TerminalThe LAARS side wall combustion air terminal, orconcentric terminal (see Table 3), must be used whenthe heater takes air from a side wall. Contact Laars forAL24-4C termination fittings. Consider the followingwhen installing the terminal:1. Do not locate the air inlet terminal near a source ofcorrosive chemical fumes (e.g., cleaning fluid,chlorine compounds, etc.)2. Locate the terminal so that it will not be subject todamage by accident or vandalism. It must be atleast 7 feet (2.1m) above a public walkway.3. Locate the combustion air terminal so that itcannot be blocked by snow. The National Fuel GasCode requires that it be at least 12 inches (30cm)above grade, but the installer may determine itshould be higher, depending upon local conditions.4. If the NeoTherm is side-wall vented to the samewall, locate the vent terminal at least 1 foot (0.3m)above the combustion air terminal.5. For concentric vent, follow instructionsincluded with vent kit.6. Multiple vent kits should be installed where thehorizontal distance between outlet group and inletgroup is 18" minimum.7. Vent outlet should be 12" above and/or 12"horizontal to inlet pipe, but outlet should never bemounted below the inlet center-line at anyhorizontal distance.2.3.3 Vertical Vent TerminalWhen the unit is vented through the roof, the ventmust extend at least 3 feet (0.9m) above the point atwhich it penetrates the roof. It must extend at least 2feet (0.6m) higher than any portion of a building withina horizontal distance of 10 feet (3.0m), and high enoughabove the roof line to prevent blockage from snow.When the combustion air is taken from the roof, thecombustion air must terminate at least 12" (30cm)below the vent terminal (see Figure 10).2.3.4 Vertical Combustion Air TerminalWhen combustion air is taken from the roof, afield-supplied rain cap or an elbow arrangement must beused to prevent entry of rain water (see Figure 11). TheFigure 12. Minimum Venting Distance.