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American Standard PLC 75-76 User Manual

American Standard PLC 75-76
36 pages
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REV. APRIL 2021 ITEM 420011141900
WARNING: If the information in these instruc-
tions is not followed exactly, a fire or explosion
may result causing property damage, personal
injury or death.
- Do not store or use gasoline or other flam-
mable vapors and liquids in the vicinity of this
or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call
the fire department.
- Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
NEW STANDARDS IN WATER HEATING
Residential-Duty Commercial
Operation, installation
and service manual
Residential-Duty Commercial Water Heater
MODELS:
PLC 75-76, PLC 100-76,
PLR 75-76, PLR 100-76
561 New York Drive, Pomona, California 91768
Toll Free: (800) 900-9063 - Fax: (909)392-7302
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American Standard PLC 75-76 Specifications

General IconGeneral
BrandAmerican Standard
ModelPLC 75-76
CategoryWater Heater
LanguageEnglish

Summary

Product Overview and Safety Guidelines

Models and Specifications

Details the available models and their designations.

General Safety Precautions

Critical warnings before use and operation, including gas leak procedures.

Installation Restrictions and Hazard Awareness

Prohibited Installation Locations

Specifies areas where the water heater must not be installed, like bathrooms or bedrooms.

Flammable Vapors and Fire Risks

Highlights dangers from flammable liquids and vapors near the appliance.

Hot Water Scald Hazards

Warns about severe burns from hot water, especially for vulnerable groups.

Other Critical Safety Hazards

Covers explosion, breathing hazards (CO), and fire hazards.

Warranty, Responsibilities, and System Requirements

Warranty Limitations and Voiding Conditions

Lists actions that will void the product warranty, such as improper installation.

Consumer Responsibilities

Outlines user duties for operation, maintenance, and referring to instructions.

Closed Water Systems & Expansion Tanks

Explains the need for expansion tanks in closed water systems to prevent pressure buildup.

General Installation and Site Preparation

Pre-Installation Safety and Checks

Steps before operation, including checking for gas and reading warnings.

Shipment Inspection and General Notes

Checking for shipment damage and verifying the correct gas type for the unit.

Location, Clearances, and Flooring

General guidance on selecting a location and ensuring adequate service access.

Installation Clearances and Flooring

Requirements for clearances from combustible materials and flooring types.

Air Supply, Drainage, and Corrosive Atmospheres

Covers air supply, drain pan installation, and avoiding corrosive atmospheres.

Venting, Connections, and Diagrams

Draft Hood and Venting System

Proper installation of the draft hood and venting system components.

Vent Size Requirements

Specifies the required vent size for different water heater models.

Water and Gas Piping Connections

Guidelines for connecting water supply and gas piping.

Typical Installation Clearances Diagram

Illustrates clearance requirements for vent termination near walls.

Typical Installation Diagram

Diagram showing typical water heater connections and components.

Specific System Configurations and Air Supply

Commercial Top Connections with Return Circulation

Diagram for commercial models with return circulation piping.

Indoor Air Supply Requirements

Requirements for air supply from inside the building for confined spaces.

Outdoor Air Supply Requirements

Requirements for air intake from outdoors through ducts or openings.

Venting System and Specialized Unit Safety

Purged Gas Discharge and Venting System

Procedures for discharging purged gases and installing the vent pipe system.

LP Gas Unit Safety

Specific safety precautions for Liquefied Petroleum (LP) gas units.

Anodes and Multiple Heater Installation

Explains anode rod function and guidelines for installing multiple heaters.

Hydrogen Gas Risk & Installation Examples

Warnings about hydrogen gas risk and examples of multiple heater installations.

Temperature and Pressure Relief Valve

T&P Valve Installation and Function

Requirements and operation of the temperature and pressure relief valve.

Pre-Operation and Filling Procedures

Filling the Heater with Water

Step-by-step procedure for filling the water heater tank before operation.

Installation Verification and Gas Type Specifics

Comprehensive Installation Checklist

A checklist to verify all installation steps are completed correctly.

Natural vs. LP Gas Handling

Specific safety rules for natural gas and LP gas models.

Maintenance, Operations, and Troubleshooting

Tank Cleaning and Maintenance

Procedures for periodic tank cleaning and returning the heater to operation.

Combination Systems and Venting Inspection

Requirements for using the heater in combination space heating systems and vent inspection.

Operating Instructions

Step-by-step guide to start the water heater safely.

Temperature Regulation and Limits

How to adjust water temperature and understand high-temperature limit switch.

Gas Pressure Specifications

Specifications for supply and manifold gas pressures.

Emergency Shutdown and Maintenance

Procedures for emergency shutdowns and routine maintenance checks.

Water Heater Sounds and Draining

Explains normal water heater sounds and procedures for draining.

Burner Ignition and Flame Problems

Troubleshooting common problems with burner ignition and flame characteristics.

Operational Issues and Water Recovery

Troubleshooting issues like high costs, low hot water, and condensation.

Parts and System Diagrams

Replacement Parts List

List of available replacement parts with part numbers.

Replacement Parts Illustration

Diagram illustrating the location of replacement parts on the unit.

Combination System Piping Diagram

Diagram showing suggested piping for combination heating/water systems.

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