A.O. Smith GPVL-50 User Manual

Service Handbook
1206 322153-000 Rev. 00
POWER VENTED GAS MODELS
WITH HOT SURFACE IGNITION
NOT FOR USE IN MANUFACTURED (MOBILE) HOMES
RESIDENTIAL GAS WATER HEATERS
TABLE OF CONTENTS
Note: References to the Manual refer to the “Installation
and Operating Manual”.
GENERAL INFORMATION 2
CHECKING THE GAS SUPPLY PRESSURE 3
LEAKAGE CHECKPOINTS 4
TEMPERATURE ADJUSTMENT 5
ANODE ROD REMOVAL/REPLACEMENT 6
DIP TUBE REMOVAL/REPLACEMENT 7
DOOR-BURNER ASSEMBLY REMOVAL/
REPLACEMENT 8
FLAME SENSOR AND IGNITER REMOVAL/
REPLACEMENT 10
BURNER AND ORIFICE REMOVAL/
REPLACEMENT 12
DOOR GASKET REPLACEMENT 16
CONTROL MODULE REMOVAL/REPLACEMENT 18
VALVE MODULE REMOVAL/REPLACEMENT 20
TEMPERATURE SENSOR AND CABLE REMOVAL/
REPLACEMENT 21
GAS VALVE REMOVAL/REPLACEMENT 22
BLOWER REMOVAL/REPLACEMENT 24
ROTATING THE BLOWER 25
PRESSURE SWITCH REMOVAL/REPLACEMENT 26
FV SENSOR 27
CLEANING THE COMBUSTION CHAMBER 28
CLEANING THE BLOWER 29
TECHNICAL BULLETINS 30
TROUBLESHOTING CHART 36

A.O. Smith GPVL-50 Specifications

General

Brand	A.O. Smith
Model	GPVL-50
Capacity	50 gallons
Fuel Type	Natural Gas
Vent Type	Power Vent
Diameter	22 inches
Warranty	6 years
Energy Factor	0.67
Type	Gas

Summary

Checking the Gas Supply Pressure

Leakage Checkpoints

Temperature Adjustment

Anode Rod Removal/Replacement

Dip Tube Removal/Replacement

Door-Burner Assembly Removal/Replacement

Flame Sensor and Igniter Removal/Replacement

Removing Flame Sensor And/Or Hot Surface Igniter

Procedures for removing the flame sensor and hot surface igniter assembly.

Burner and Orifice Removal/Replacement

Burner Orifice

Removing Burner Orifice

Steps for removing the burner orifice from the assembly.

Installing Burner Orifice

Door Gasket Replacement

Control Module Removal/Replacement

Removing Electronic Control Module

Valve Module Removal/Replacement

Removing Valve Module

Temperature Sensor and Cable Removal/Replacement

Removing Temperature Sensor and Cable

Gas Valve Removal/Replacement

Removing Gas Control Valve

Step-by-step guide to safely remove the gas control valve assembly.

Installing Gas Control Valve

Procedures for installing a new gas control valve, including sealing and connections.

Blower Removal/Replacement

Removing Blower

Installing Blower

Rotating the Blower

Pressure Switch Removal/Replacement

Removing Pressure Switch

Installing Pressure Switch

FV Sensor

Cleaning the Blower

Gas Control LED Status Codes

Ignition State and Timing