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

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

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