Maytag HRP4975S, HRN4975S, HRN5975S, HRP5975S manual ALL AIR from Inside Buildings See Figures 10

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these instructions can restrict the air flow required for proper combustion, potentially resulting in fire, asphyxiation, serious personal injury or death.

Do not apply insulation to the top of the water heater, as this will interfere with safe operation of the draft hood.

Do not cover the outer door, thermostat or temperature & pressure relief valve.

Do not allow insulation to come within 2” (50.8 mm) of the floor to prevent blockage of combustion air flow to the burner.

Do not cover the instruction manual. Keep it on the side of the water heater or nearby for future reference.

Do obtain new warning and instruction labels from Maytag for placement on the blanket directly over the existing labels.

Do inspect the insulation blanket frequently to make certain it does not sag, thereby obstructing combustion air flow.

Combustion Air and Ventilation for Appliances Located in Unconfined Spaces

UNCONFINED SPACE is space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kW) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed, through openings not furnished with doors, are considered a part of the unconfined space.

In unconfined spaces in buildings, infiltration may be adequate to provide air for combustion, ventilation and dilution of flue gases. However, in buildings of tight construction (for example, weather stripping, heavily insulated, caulked, vapor barrier, etc.), additional air may need to be provided using the methods described in Combustion Air and Ventilation for Appliances Located in Confined Spaces.

Combustion Air and Ventilation for Appliances Located in Confined Spaces

CONFINED SPACE is a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kW) of the aggregate input rating of all appliances installed in that space.

A.ALL AIR FROM INSIDE BUILDINGS: (See Figures 10 and 11)

The confined space shall be provided with two permanent openings communicating directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an unconfined space. The total input of all gas utilization equipment installed in the combined space shall be considered in making this determination. Each opening shall have a minimum free area of one square inch per 1,000 Btu per hour (22 cm2/kW) of the total input rating of all gas utilization equipment in the confined space, but not less than 100 square inches (645 cm2). One opening shall

commence within 12 inches (30 cm) of the top and one commencing within 12 inches (30 cm) of the bottom of the enclosures.

FIGURE11.

B. ALL AIR FROM OUTDOORS: (See Figures 12, 13 and 14)

The confined space shall be provided with two permanent openings, one commencing within 12 inches (30 cm) of the top and one commencing within 12 inches (30 cm) from the bottom of the enclosure. The openings shall communicate directly, or by ducts, with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors.

FIGURE12.

When directly communicating with the outdoors, each opening shall have a minimum free area of 1 square inch per 4,000 Btu per hour (5.5 cm2/kW) of total input rating of all equipment in the enclosure, see Figure 12.

When communicating with the outdoors through vertical ducts, each opening shall have a minimum free area of 1 square inch per 4,000 BTU per hour (5.5 cm2/kW) of total input rating of all equipment in the enclosure, see Figure 13.

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Contents Series Nine Safe INSTALLATION, USE and Service Important DefinitionsSafety Precautions Table of Contents Product Specifications Customer ResponsibilitiesAccessories and Tools Needed AccessoriesAdditional Tools Needed When Sweat Soldering ToolsPreparations for Installation Removing the Old Water HeaterTypical Installation GET to Know Your Water Heater GAS ModelsMixing Valve Usage Locating and Installing the NEW Water Heater Facts to Consider About the LocationInsulation Blankets ALL AIR from Inside Buildings See Figures 10 Water Piping Temperature-Pressure Relief Valve Filling the Water Heater Venting Gas Piping GAS Piping with Flexible Connector Sediment TrapsFor Your Safety Read Before Lighting Operating InstructionsFor Your Safety Read Before Lighting Temperature Regulation Temperature Time to Produce 2nd & 3rdService and Maintenance Tank Sediment CleaningBurner Cleaning Vent System InspectionTemperature-Pressure Relief Valve Operation HousekeepingAnode Rod Inspection DrainingTroubleshooting Drain Valve Washer ReplacementService Start Up ConditionsOperational Conditions Smoke / OdorLeakage Checkpoints Troubleshooting Guide Problem Cause SolutionRepair Parts List Maytag GAS Water HeatersPage Page Page Warranty