Lochinvar TNR-I&S-02 service manual Direct Vent Terminal Location, Exceptions for Installations

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TNR-I&S-02

NOTICE

If 4 inch PVC or CPVC pipe is used, then a 4 inch PVC or CPVC screened intake and exhaust 90° elbow is required.

Direct Vent Terminal Location

Plan the vent system layout so that proper clearances are maintained from plumbing and wiring. Before the vent is installed, determine the vent pipe termination location as shown below in Figure 10.

EXCEPTIONS FOR INSTALLATIONS

The vent terminal must not terminate:

1.Directly above a paved sidewalk or paved driveway which is located between two single-family dwellings and serves both dwellings;

2.Less than 7 feet (2.1 m) above a paved sidewalk or a paved driveway located on public property;

3.Within 6 feet (1.8 m) of a mechanical air supply inlet to any building;

Figure 10

Vent Terminal Location

Vent terminals must terminate at least 3 feet (0.9 m) above any forced air inlet located within 10 feet (3.1 m). This provision does not apply to:

1.The combustion air intake of a direct vent appliance or the circulating air inlet and flue gas discharge of listed outdoor appliances.

2.The exhaust vent terminal must be installed with at least 12 inches (30 cm) clearance from any air opening into a building.

3.The bottom of the exhaust vent and combustion air intake terminals must be located at least 12 inches (30 cm) above grade and above the anticipated snow level.

4.Must be installed at least 3 feet (0.9 m) from any gas meter, gas valve or other gas regulating equipment.Must be installed in a location where it will not be blocked by snow.

5.The exhaust vent and combustion air intake terminals must be installed so that the centerline distances are at least 18 inches (45.7cm) apart and the exhaust vent terminal elbow extends 6 inches (15.2 cm) past the combustion air intake terminal.

4.Above a gas meter/regulator assembly within 3 feet (0.9 m) horizontally of the vertical centerline of the regulator;

5.Within 6 feet (1.8m) of any gas service regulator vent outlet;

6.Less than 1 foot (30.5 cm) above grade level;

7.Within 12 inches (30.5 cm) of a window or door, which can be opened in any building, any non-mechanical air, supply inlet to any building or the combustion air inlet of any other appliance;

8.Underneath a veranda, porch or deck, unless:

The veranda, porch or deck is fully open on a minimum of two sides beneath the floor and

The distance between the top of the vent termination and the underside of the veranda, porch or deck is greater than 1 foot (30.5 cm).

The vent system must terminate so that proper clearances are maintained as cited in local codes or the latest edition of the National Fuel Gas Code, ANSI Z223.1.73.4e and 7.8a, b as follows:

1.Do not terminate the exhaust vent terminal over public area where condensate or vapor can cause nuisance or hazard.

2.For direct vent, the venting system shall terminate at least 1 foot below, 1 foot horizontally from or 1 foot above any door, window, or gravity air inlet into building.

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Contents General Information Table of ContentsLocation Installation InstructionsConfined Space AIR RequirementsMechanical Exhausting of Room AIR Unconfined SpaceInjury. The water is under pressure and may splash Result from excessive temperature and pressuresWater Connections Instructions for ConnectionsApproximate TIME/TEMPERATURE Relationships in Scalds Approximate Time/Temperature Scald ChartScalding Venting Direct Vent InstallationVent Terminal Location Exceptions for InstallationsDirect Vent Terminal Location Vent terminal must not terminateFollow the following procedure to vent through the wall Horizontal InstallationVertical Installation Follow the following procedure to vent through the roofDetermining required vent length Power Vent InstallationPower Vent Terminal Location RatedTypical Vertical Power Vent System Installation Total vent length can not exceed Max. Vent ength in Table Maximum Vent Length DeterminationRain Cap to Small Vent Pipe Ass’y Initial Preparation Vent Pipe PreparationSelection of Materials GAS Pressure Regulation GAS ConnectionsElectrical Connections GAS Meter Size Natural GAS onlySequence of Operation Wiring Diagram and SchematicOperating Instructions General Instructions To Fill the Water HeaterLighting Instructions Burner Flame Check MaintenanceMaintenance Schedule GeneralSediment and Lime Scale Removal Flushing Water HeaterDraining Water Heater Filling Water HeaterVent and AIR Intake System Anode Inspection and ReplacementDrain Valve and Tank Access Panel Relief ValveCheck Collector Limit Switch as previously mentioned Replace the switchMake sure that the temperature of the tank is cool Times, call service