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A.O. Smith FPSH - User Manual

A.O. Smith FPSH
18 pages
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1
PART NO. 183432-000 REV.1
PRINTED IN U.S.A. 2566 200 SUPERSEDES PART NO. 183323-000
KEEP THIS MANUAL IN THE POCKET ON THE HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
Power Vented Gas Models
FPSH/FPCR/FPST
with SmartValve
TM
,
Hot Surface Ignition
& 2” PVC Vent Capability
Thank you for buying this energy efficient water heater from A.O.
Smith Water Products Company. We appreciate your confidence
in our products.
You should thoroughly read this manual before installation and/
or operation of this water heater. Please pay particular attention
to the important safety and operating instructions as well as the
WARNINGS and CAUTIONS.
CAUTION
TEXT PRINTED OR OUTLINED IN RED CONTAINS
INFORMATION RELATIVE TO YOUR SAFETY.
PLEASE READ THOROUGHLY BEFORE
INSTALLING AND USING THIS APPLIANCE.
OWNER'S MANUAL
A DIVISION OF A.O. SMITH CORPORATION
MCBEE, SOUTH CAROLINA
www.hotwater.com
GET TO KNOW YOUR WATER HEATER 2
GENERAL SAFETY INFORMATION 3
INSTALLATION 4-12
OPERATION & LIGHTING INSTRUCTIONS 12-14
MAINTENANCE 15-16
TROUBLESHOOTING 16-17
WARRANTY 18
TABLE OF CONTENTS
PAGE
RESIDENTIAL GAS WATER HEATERS

Questions and Answers

  • J
    Jeffrey SantiagoSep 10, 2025
    Why is there condensation around my A.O. Smith FPSH?
    • J
      Jacob HartSep 10, 2025
      If you notice condensation with your A.O. Smith Water Heater, and there's water on the floor under the heater, consult the “CONDENSATION” section. If water is dripping from the pan, provide a drip “TEE” to catch the condensation, as shown in figure 1.
  • A
    ashley86Aug 22, 2025
    Why A.O. Smith FPSH Water Heater has not enough hot water because of thermostat problems?
    • S
      Sherri StoneAug 23, 2025
      If your A.O. Smith Water Heater isn't producing enough hot water due to thermostat issues, first, ensure the thermostat isn't set too low by turning the temperature control higher. If the issue persists, the thermostat or ECO may be defective and require replacement.
  • J
    Jessica WilsonAug 25, 2025
    Why is my A.O. Smith FPSH Water Heater leaking from the T&P valve?
    • G
      Gina PerezAug 25, 2025
      If your A.O. Smith Water Heater is leaking from the T&P valve, it could be due to thermal expansion in a closed water system. To resolve this, install a thermal expansion tank, and do not plug the T&P valve. Alternatively, the valve might be improperly seated, so check the relief valve for proper operation, again ensuring not to plug the T&P valve.
  • H
    Holly JohnsonAug 27, 2025
    What to do if A.O. Smith FPSH Water Heater has not enough hot water?
    • A
      Aaron VargasAug 27, 2025
      If your A.O. Smith Water Heater is not providing enough hot water, consider these factors: the heater might be undersized, so reduce hot water usage. Low gas pressure could be a factor, so contact your dealer. If the incoming water is unusually cold, allow more time for the heater to reheat. Also, check for leaking hot water pipes or fixtures and have a plumber repair any leaks.
  • J
    Jason AyalaAug 27, 2025
    Why is the water from my A.O. Smith FPSH Water Heater too hot?
    • G
      Gregory SnowAug 27, 2025
      If your A.O. Smith Water Heater is producing water that is too hot, it may be because the thermostat is set too high. Refer to HIGH TEMPERATURE REGULATION for instructions.
  • M
    Mr. Michael LeeAug 29, 2025
    Why is my A.O. Smith Water Heater leaking water?
    • B
      baileymirandaAug 29, 2025
      If your A.O. Smith Water Heater is leaking water, it could be due to improperly sealed hot or cold supply connections, relief valve, drain valve, or thermostat threads. Try tightening these threaded connections. It could also be due to leakage from other appliances or water lines, so inspect other appliances near the water heater. Finally, condensation of flue products could be the cause, so refer to the “CONDENSATION” section.
  • A
    Angelica MoralesSep 18, 2025
    What causes sooting in my A.O. Smith FPSH Water Heater?
    • A
      Alexis WebsterSep 18, 2025
      If your A.O. Smith Water Heater is sooting, it indicates improper combustion. Refer to AIR REQUIREMENTS on page 4.
  • M
    Monique HinesSep 12, 2025
    Why does my A.O. Smith FPSH have hot water odors?
    • G
      Gabriela AndersonSep 12, 2025
      If you're experiencing hot water odors from your A.O. Smith Water Heater, which may relate to cathodic protection, it could be due to high sulfate or mineral content in the water supply. To address this, drain and flush the heater thoroughly, then refill it. Another cause could be bacteria in the water supply, in which case, chlorinate the water supply.
  • N
    nkellySep 8, 2025
    What does it mean when my A.O. Smith FPSH Water Heater LED status shows 6 flashes?
    • R
      Ronald NelsonSep 8, 2025
      If your A.O. Smith Water Heater's LED status is showing 6 flashes, it could be due to several reasons: the gas supply is off or too low, the HSI element is damaged, the appliance is not properly grounded, the flame sense rod is contaminated or not correctly positioned, the HSI element is not positioned correctly, or the wiring is not connected properly. To resolve this, cycle the external power or remove the request for heat for 2 seconds before reapplying.
  • J
    Jonathan ArmstrongSep 5, 2025
    How to fix A.O. Smith FPSH Water Heater when LED status is off?
    • M
      Monica MclaughlinSep 5, 2025
      If your A.O. Smith Water Heater's LED status is off, it indicates there is no power to the system control. Check for power to the heater, inspect the wiring harness for proper connections, and verify line voltage at the harness connectors.

Summary

Installation

Gas and Water Connections

Procedures and precautions for connecting the gas and water supply lines.

Relief Valve and Venting Installation

Proper installation of the relief valve and critical venting requirements.

Vent System Installation

Detailed instructions for planning and installing the power vent system.

Operation

Filling and Temperature Regulation

Steps for filling the unit and adjusting water temperature settings.

Operating Instructions

Step-by-step guide for safely starting and operating the water heater.

Maintenance

Trouble Shooting

Gas Valve and System Lockouts

Troubleshooting common gas valve issues and system lockouts with LED status.

A.O. Smith FPSH Specifications

General IconGeneral
BrandA. O. Smith
CategoryWater Heater
TypePoint-of-Use
Fuel TypeElectric
Vent TypeNot applicable
Frequency60 Hz
ThermostatAdjustable
ColorWhite

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