A.O. Smith XCRX-50-LP User Manual

100263112
January 2015
Residential Gas
Water Heater
Installa on Instruc ons and
Use & Care Guide
Keep this manual in the pocket on heater for future reference whenever maintenance, adjustment or service is required.
Retain your original receipt as proof of purchase.
Residen al Atmospheric Gas Water Heater
with the Flammable Vapor Igni on Resistant
Safety System
Read this manual and the labels on the water heater before you install,
operate, or service it. If you have diffi culty following the direc ons, or
aren’t sure you can safely and properly do any of this work yourself:
• Call our Technical Assistance Hotline at 1-800-527-1953 . We can help you with in-
stalla on, opera ons, troubleshoo ng, or maintenance. Before you call, write down
the model and serial number from the water heater’s data plate.
Incorrect installa on, opera on, or service can damage the water heater, your house
and other property, and present risks including fi re, scalding, electric shock, and
explosion, causing serious injury or death.
Do not store or use gasoline or other
fl ammable 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 build-
ing.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instruc ons.
• If you cannot reach your gas sup-
plier, call the fi re department.
Installa on and service must be per-
formed by a qualifi ed installer, service
agency or the gas supplier.
WARNING: If the informa on in
these instruc ons is not followed
exactly, a fi re or explosion may
result causing property damage,
personal injury or death.
LOW LEAD
CONTENT
Table of Contents Page
IMPORTANT SAFETY INFORMATION ............................................. 3
GETTING STARTED ........................................................................ 7
INSTALLATION ............................................................................. 14
OPERATION ................................................................................. 23
TROUBLESHOOTING ................................................................... 25
MAINTENANCE ........................................................................... 28
NOTES ......................................................................................... 31
REPAIR PARTS ............................................................................. 35

A.O. Smith XCRX-50-LP Specifications

General

Model	XCRX-50-LP
Category	Water Heater
Fuel Type	Liquid Propane
Capacity	50 gallons
Energy Factor	0.62
Weight	160 lbs
Warranty	6 years

Summary

IMPORTANT SAFETY INFORMATION

Safety Alert Symbol and Hazard Definitions

Explains safety symbols (DANGER, WARNING, CAUTION, NOTICE) and alerts.

Risks During Installation and Maintenance

Details risks like lifting and potential damage during installation.

Risks During Operation

Covers explosion and scalding risks associated with operating the water heater.

Fire and Explosion Hazards

Addresses fire risks, flammable vapors, and explosion potential from pressure.

Gas and Venting Safety Risks

Covers carbon monoxide, burn risks from venting, and hydrogen gas buildup.

GETTING STARTED

Combustion and Ventilation Air Supply Requirements

Explains the need for adequate air for combustion and ventilation.

Ventilation Calculations and Options

Details methods for calculating air volume and available ventilation types.

Venting System Installation Guidelines

Covers material, clearance, installation, and termination of vent systems.

Water Supply and Space Heating Considerations

Discusses connecting to space heating systems and solar installations.

INSTALLATION

Verifying Home Plumbing and Water Pressure

Checks home readiness, water pressure, and thermal expansion.

Location Requirements and Old Heater Removal

Specifies appropriate locations and steps for removing the old water heater.

Installing New Water Heater and Connections

Guides on setting up the new unit, drain pans, and basic connections.

T&P Valve, Mixing Valves, and Water Supply Connection

Covers installation of safety valves, mixing valves, and connecting water lines.

Gas Line Connection and Final Checks

Details making gas connections and a pre-lighting checklist.

OPERATION

Pilot Lighting and Status Indicator Lights

Step-by-step instructions for lighting the pilot and interpreting status lights.

Vent System and Air Supply Testing

Procedures to ensure proper venting and adequate air supply.

Temperature Adjustment and Operating Modes

How to set the desired temperature and use operating modes like Vacation.

TROUBLESHOOTING

Diagnosing No Hot Water and Pilot Issues

Step-by-step guide for troubleshooting lack of hot water and pilot light problems.

Addressing Insufficient Hot Water and Pressure

Covers causes for low hot water supply and pressure-related issues.

Status Light Code Troubleshooting Chart

A table correlating status light flashes to problems and corrective actions.

MAINTENANCE

Draining, Flushing, and Anode Rod Inspection

Routine tasks for tank maintenance, sediment removal, and anode rod checks.

Visual Inspection and Air Filter Cleaning

Annual checks of systems and cleaning of the air filter.

Replacing Key Components

Instructions for removing and replacing the gas control valve/thermostat.

NOTES

REPAIR PARTS

Parts List and Identification

Lists available replacement parts with corresponding item numbers and illustrations.