A.O. Smith
HYB-90N
warranty
Ad
Troubleshooting
Install
Fault
Controls. Wiring Errors Can
Maintenance
Diagnostic Display
Access To
Door pins locked in place
Claim Procedure
Cleaning The Heat Engine
Page 58
NOTES
58
www.hotwater.com
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Page 59
Image 58
Page 57
Page 59
Contents
Installation and Operating Manual
For Your Safety
POWER VENT GAS MODELS
HYBRID GAS WATER HEATERS
TABLE OF CONTENTS
IMPORTANT INFORMATION
SAFE INSTALLATION, USE AND SERVICE
IMPORTANT DEFINITIONS
GENERAL SAFETY
DANGER
INTRODUCTION
Page
REPLACEMENT PARTS AND DELIMING PRODUCTS
GET TO KNOW YOUR WATER HEATER - GAS MODELS
INSTALLATION CONSIDERATIONS
ROUGH IN DIMENSIONS
INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS
WATER PIPING - MIXING VALVE USAGE
Water Potable Heating All models are considered
FACTS TO CONSIDER ABOUT LOCATION
HANDLE INSTALLATION
EARTHQUAKE ZONES
Access To
Screws
Top Casing Front
APPLIANCES IN UNCONFINED SPACES
COMBUSTION AIR AND VENTILATION
APPLIANCES IN CONFINED SPACES
B. ALL AIR FROM OUTDOORS See Figures 12, 13 and
CLOSED WATER SYSTEMS
CHEMICAL VAPOR CORROSION
WATER PIPING
THERMAL EXPANSION
HARD WATER
TEMPERATURE-PRESSURE RELIEF VALVE
T&P Valve and Pipe Insulation if supplied
GAS PIPING
SEDIMENT TRAPS
FLOODING/FREEZING
HIGH ALTITUDE INSTALLATIONS
GAS LINE PURGING
FILLING THE WATER HEATER
VENT PIPE TERMINATION
If using 2 inch vent pipe
PLANNING THE VENT SYSTEM
TERMINATION ELBOW
If using 3 inch vent pipe
RODENT SCREEN INSTALL INTO ELBOW GROUND LEVEL OR MAXIMUM SNOW LINE
ELBOW STRAP
CONDENSATE
INSTALLATION OF VENT SYSTEM
VENT TERMINAL INSTALLATION, SIDEWALL
CONDENSATION WARNING
INSTALLATION SEQUENCE
SEQUENCE OF INSTALLATIONS
Vent terminals supplied with heater must be used
INSTALLATION OF VENT SYSTEM, SIDEWALL
INSTALLATION OF VERTICAL VENT SYSTEM
VENT PIPE PREPARATION
STEP A
RECOMMENDED BRUSH* SIZE FOR PRIMER AND CEMENT APPLICATIONS
STEP B
STEP F
U.S. POWER VENT
STEP E
STEP G CONNECTION TO VENT PIPE
VENT HOODS MAY BE EXTREMELY HOT DURING OPERATION
FIGURE 33a
ELECTRICAL CONNECTIONS
CALIBRATION
“OFF”, “up”
OPERATING INSTRUCTIONS
DISPLAY PANEL
Numeric Display
CONTROLS. WIRING ERRORS CAN
CAUTION LABEL ALL WIRES PRIOR TO
DISCONNECTION WHEN SERVICING
CAUSE IMPROPER AND DANGEROUS
OPERATING INSTRUCTIONS
LIGHTING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE LIGHTING
TO TURN OFF GAS TO APPLIANCE
STATE
HEAT CYCLE DEFINITIONS
DESCRIPTION
TEMPERATURE REGULATION
UNIQUE HYBRID FEATURES
Temperature Probes
Water Circulation Pump
Line Voltage Monitor
START UP CONDITIONS
CONSTANT OUTPUT TEMPERATURE CONTROL
Detection of Failure to Maintain Desired Constant Temperature
OPERATIONAL CONDITIONS
VENTING SYSTEM INSPECTION
MAINTENANCE
HOUSEKEEPING
BURNER OPERATION AND INSPECTION
TEMPERATURE-PRESSURE RELIEF VALVE OPERATION
ANODE ROD REPLACEMENT
CLEANING THE INLET WATER FILTER
MOTORS
CLEANING THE HEAT ENGINE
FLUSHING THE HEAT EXCHANGER LIME BUILD- UP
FAULT INDICATION AND ERROR CODES
DRAINING THE TANK
Code and
DIAGNOSTIC DISPLAY
Diagnostic
Displayed
Cause
Fault
Lockout
Remedy
Code
Fault
Lockout
Description
Code
TROUBLESHOOTING
b.The unit display is an error code
WHEN THE TAP IS OPENED
Check if there is any error code on
system installed, or there is a
SERVICE
LEAKAGE CHECKPOINTS
ITEM #
PARTS IDENTIFICATION
A Baffle, Flue B Hot Water Outlet Nipple w/ Anode, Heat Trap
AB C DEF G T SH R I Q P
REPLACEMENT PARTS DESCRIPTION
KIT #
CLAIM PROCEDURE
LIMITED RESIDENTIAL GAS WARRANTY
SERVICE AND LABOR RESPONSIBILITY
CONDITIONS AND EXCEPTIONS
Page
Page
500 TENNESSEE WALTZ PARKWAY ASHLAND CITY, TN PHONE 1-800-433-2545 FAX
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