A.O. Smith FPSH - 75 User Manual

1
PRINTED IN U.S.A. 0703 PART NO. 195785-000
GAS MODELS
FPSH - 75
270 Series
with Hot Surface Ignition
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 WARNING and CAUTIONS.
CAUTION
TEXT PRINTED OR OUTLINED IN RED CONTAINS
INFORMATION RELATIVE TO YOUR SAFETY.
PLEASE READ THOROUGHLY BEFORE
INSTALLING AND USING THIS APPLIANCE.
RESIDENTIAL GAS WATER HEATERS
OWNER'S MANUAL
A DIVISION OF A.O. SMITH CORPORATION
www.hotwater.com
GET TO KNOW YOUR WATER HEATER 2
GENERAL SAFETY INFORMATION 3-4
INSTALLATION 4-12
OPERATION 12-14
MAINTENANCE AND
TROUBLESHOOTING 14-17
TROUBLESHOOTING WITH THE LED 18
WARRANTY 19
TABLE OF CONTENTS
PAGE
KEEP THIS MANUAL IN THE POCKET ON THE HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.

A.O. Smith FPSH - 75 Specifications

General

Model	FPSH - 75
Category	Water Heater
Capacity	75 Liters
Fuel Type	Electric
Power Source	Electric
Thermostat	Adjustable
Pressure Rating	8 Bar
Warranty	5 years
Type	Storage Water Heater

Summary

GET TO KNOW YOUR WATER HEATER

GENERAL SAFETY INFORMATION

EXTERNAL DAMAGE

Precautions regarding physical damage to the water heater.

CHEMICAL VAPOR CORROSION

Risks of corrosive chemical vapors affecting unit operation and safety.

IMPROPER COMBUSTION

Dangers associated with improper combustion and venting of gases.

INSTALLATION

LOCATION OF HEATER

Guidelines for selecting an appropriate and safe location for the water heater.

AIR REQUIREMENTS

Details the necessary air supply for combustion and ventilation.

CONFINED SPACE

CLOSED WATER SYSTEM

GAS CONNECTIONS

Provides information on properly connecting the gas supply to the unit.

PLANNING THE VENT SYSTEM

VENT PIPE TERMINATION

INSTALLATION OF VENT SYSTEM, SIDEWALL

Instructions for installing the vent system through a sidewall.

INSTALLATION OF VERTICAL VENT SYSTEM

Instructions for installing the vent system through a roof.

VENT PIPE PREPARATION

OPERATION

TO OPERATE THE HEATER

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

OPERATING INSTRUCTIONS

Step-by-step guide for operating the water heater.

TEMPERATURE REGULATION

SERVICE AND REPAIR

TROUBLE SHOOTING

General guidance for identifying and resolving common water heater problems.

TROUBLESHOOTING

NOT ENOUGH OR NO HOT WATER

Troubleshooting steps for issues related to insufficient or no hot water.

VENT PIPE TOO HOT (ABOVE 170° F)

Troubleshooting steps for an overheating vent pipe condition.

YELLOW FLAME

Troubleshooting steps for identifying and correcting a yellow burner flame.

WATER LEAKS

LEAKING T&P VALVE

HEATER LIGHT GOES OUT IN 4-5 SECONDS

Troubleshooting steps for the burner shutting off shortly after ignition.

TROUBLE SHOOTING GUIDE

OPEN EARTH GROUND CIRCUIT

Troubleshooting ground circuit issues using LED status indicators.

WIRING ERROR OR HIGH RESISTANCE TO EARTH GROUND

Troubleshooting wiring errors and high resistance to earth ground.

PRESSURE SWITCH CLOSED TOO LONG

PRESSURE SWITCH OPEN TOO LONG

HOT SURFACE IGNITOR CIRCUIT ERROR

SYSTEM IN LOCKOUT

GAS VALVE DRIVER CIRCUIT PROBLEM

INTERNAL CIRCUIT PROBLEM

FLAME SIGNAL OUT OF SEQUENCE

ECO ACTIVATED

STUCK TEMPERATURE ADJUST BUTTON

TEMPERATURE SENSOR OPEN OR SHORT CIRCUITED