A.O. Smith GDVH Owner'S Manual Download Page 1

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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.

KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE

WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.

A DIVISION OF A.O. SMITH CORPORATION

www.aosmithwaterheaters.com

.............................................................................

PAGE

GET TO KNOW YOUR WATER HEATER ...................... 2

GENERAL SAFETY INFORMATION ............................. 3

INSTALLATION ......................................................... 3-19

OPERATION ............................................................. 19-21

MAINTENANCE AND
TROUBLESHOOTING .............................................. 21-23

WARRANTY ................................................................. 24

TABLE OF CONTENTS

DIRECT VENT
GAS MODELS

GDVH/GDVS/XDVS

GAS WATER HEATERS

OWNER'S MANUAL

RESIDENTIAL

PRINTED IN U.S.A. 0106

PART NO. 184961-001

Summary of Contents for GDVH

Page 1: ...ED IN RED CONTAINS INFORMATION RELATIVE TO YOUR SAFETY PLEASE READ THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED A DIVISION OF A O SMITH CORPORATION www aosmithwaterheaters com PAGE GET TO KNOW YOUR WATER HEATER 2 GENERAL SAFETYINFORMATION 3 INSTALLATION 3 19 OPERATION 19 21...

Page 2: ...015 1 800 433 2545 When ordering parts provide complete model and serial numbers see rating plate quantity and name of part desired as listed in Figure 1 Standard hardware items may be purchased locally TYPICAL INSTALLATION WARNING DO NOT ATTEMPT TO OPERATE WATER HEATER WITH COLD WATER INLET VALVE CLOSED GET TO KNOW YOUR WATER HEATER ALL PIPING MATERIALS TO BE SUPPLIED BY CUSTOMER FIGURE 1 DO NOT ...

Page 3: ...entification of components mentioned below Failure to follow these instructions can restrict the air flow required for proper combustion resulting in fire asphyxiation serious personal injury or death Do not cover the outer door thermostat or temperature pressure relief valve Do not cover the instruction manual Keep it on the side of the water heater or nearby for future reference Do obtain new wa...

Page 4: ... may NEVER be connected to any existing heating system or component s previously used with a non potable water heating appliance 4 When the system requires water for space heating at temperatures higher than required for domestic water purposes a tempering valve must be installed see Figure 2 for suggested piping arrangement FIGURE2 CLOSED WATER SYSTEM A closed system will exist if a back flow pre...

Page 5: ...TOMATIC GAS SHUT OFF DEVICES FOR HOT WATER SUPPLY SYSTEMS ANSI Z21 22 CURRENT EDITION MUST BE INSTALLED IN THE HEATER IN THE MARKED OPENING PROVIDED SEE FIGURE 1 THE VALVE MUST BE OF A SIZE INPUT RATING THAT WILL BE ADEQUATE FOR YOUR SIZE HEATER Check the metal tag on the relief valve and compare it to the heater s rating plate The pressure rating of the relief valve must not exceed the working pr...

Page 6: ...truction that may interfere 18 minimum from the ground and 12 from ceiling overhangs see Figure 4 The direct vent terminal shall terminate at least 3 feet above any forced air inlet located within 10 feet see Figure 5 9 minimum horizontally from or above any door window or gravity air inlet into the building 50 000 BtuH input or less 12 minimum horizontally from or above any door window or gravity...

Page 7: ...lly and or horizontally see Figures 10 and 11 WARNING At no time can more than one Vertical and or one Horizontal Vent Kit be used Unless otherwise specified at the time of ordering a standard extension kit is individually packaged and shipped within the water heater carton POSSIBLE EXTENSION COMBINATIONS FIGURE10 FIGURE11 FIGURE6 FIGURE7 FIGURE 8 FIGURE 9 ...

Page 8: ... installation of the various kit combinations has been broken into individual sections The two steps below are common to all installations Once these have been performed you need only to refer to the type installation that pertains to you Installation Using Vent Kits 1 Standard Vent Kit Page 8 2 Optional Vertical Vent Kit Page 10 with Standard Vent Kit 3 Optional Horizontal Vent Kit Page 13 4 Opti...

Page 9: ...sing a 22 drill bit drill holes into the flue collar at the two slots and secure the elbow to the flue collar using the screws provided NOTE Make sure elbow is properly aligned to opening in the outside wall FIGURE16 3 Using the tube of sealant supplied run an ample amount around the oval flare of the jacket FIGURE17 4 First remove the 3 horizontal extension from the elbow Starting with the long e...

Page 10: ... in the construction of the exterior wall FIGURE27 13 Insert the 3 diameter flue extension pipe into the vent collar assembly flared notched end first and lock turn clockwise to lock studs to slots the flue extension pipe to the flue elbow FIGURE28 14 Connect the vent cap by sliding its end over the 3 diameter extension pipe and O ring NOTE To facilitate ease of assembly of the vent cap to the 3 p...

Page 11: ... equation below chart and drawing to find the length of expansion of the telescoping flue sections Because of manufacturing tolerances place the telescoping extension on the water heater and adjust the height X Dimension and mark the point Once the length has been determined lock the two sections together by drilling two holes 180 apart in the pipe and securing with the screws supplied EQUATION C ...

Page 12: ...ots the elbow Using a 22 drill bit drill holes into the flue extension at the two slots and secure the elbow to the flue extension using the screws provided FIGURE40 8 Making sure the 6 diameter elbow is centered around the 3 diameter flue secure the 6 diameter vent pipe using two sheet metal screws at the connection of the elbow and 6 vertical extension FIGURE41 9 The standard vent kit includes a...

Page 13: ...sliding its end over the 3 diameter extension pipe and O ring NOTE To facilitate ease of assembly of the vent cap to the 3 pipe a soap solution can be applied to the O ring gasket FIGURE50 18 The vent cap has 4 holes around the outer edge Remove the 4 screws used to temporarily attach the collar to the exterior wall Then secure the vent cap assembly with the vent collar assembly to the exterior wa...

Page 14: ...f sealant supplied run an ample amount around the oval flare of the jacket FIGURE56 4 First remove the 3 horizontal extension from the elbow Starting with the long end with four securing holes place the 6 diameter vent elbow over the 3 diameter elbow Bend the round end oval to fit the flared oval end of the jacket top FIGURE57 5 Making sure the 6 diameter elbow is centered around the 3 diameter fl...

Page 15: ...pes of screws may have to be substituted depending on the construction of the exterior wall FIGURE66 14 Place the vent cap in the vent collar assembly FIGURE67 15 The vent cap has 4 holes around the outer edge Remove the 4 screws used to temporarily attach the collar to the exterior wall Then secure the vent cap assembly with the vent collar assembly to the exterior wall using the same 4 screws NO...

Page 16: ...n below chart and drawing to find the length of expansion of the telescoping flue sections Because of manufacturing tolerances place the telescoping extension on the water heater and adjust the height X Dimension and mark the point Once the length has been determined lock the two sections together by drilling two holes 180 apart in the pipe and securing with the screws supplied EQUATION C A 10 X S...

Page 17: ...a 22 drill bit drill holes into the flue extension at the two slots and secure the elbow to the flue extension using the screws provided FIGURE81 8 The standard kit includes a single piece of 3 flue and 6 vent pipe which will not be used in conjunction with the optional horizontal kit FIGURE82 9 Making sure the 6 diameter elbow is centered around the 3 diameter flue secure the 6 diameter vent pipe...

Page 18: ...as 4 holes around the outer edge Remove the 4 screws used to temporarily attach the collar to the exterior wall Then secure the vent cap assembly with the vent collar assembly to the exterior wall using the same 4 screws NOTE Screws are supplied however substitution may be necessary depending on the exterior wall material FIGURE91 19 Move indoors to complete the assembly process 20 Collapse the 6 ...

Page 19: ... OF THE BURNER ORIFICE INACCORDANCE WITH THE NATIONAL FUEL GAS CODE ANSI Z223 1 NFPA 54 FAILURE TO REPLACE THE ORIFICE COULD RESULT IN IMPROPER AND INEFFICIENT OPERATION OF THE APPLIANCE PRODUCING CARBON MONOXIDE GAS IN EXCESS OF SAFE LIMITS WHICH COULD RESULT IN SERIOUS PERSONAL INJURY OR DEATH CONTACT YOUR GAS SUPPLIER FOR ANY SPECIFIC CHANGES WHICH MAY BE REQUIRED IN YOUR AREA A O Smith builds ...

Page 20: ...ty information above on this label If you don t smell gas go to the next step 5 If you don t smell gas turn knob on gas control counter clockwise to PILOT position 6 Pilot can be viewed through observation port Note location of piezo ignitor 7 Depress the gas control knob all the way down Immediately depress the piezo ignitor button until a click is heard and then release Check to see if pilot is ...

Page 21: ...lame characteristics This is done by removing door on heater fig 1 The main burner should provide complete combustion of gas ignite rapidly give reasonably quiet operation cause no excessive flame lifting from burner ports Make sure that the flow of combustion and ventilation air is not blocked If proper flame characteristics are not evident check for accumulation of lint or other foreign material...

Page 22: ...or an improper vent Check with your dealer for more information CATHODIC PROTECTION ANODE The anode rod within the tank is designed to be slowly consumed cathodically minimizing corrosion in the glass lined tank A hydrogen sulfide rotten egg odor may result if water contains high sulfate and or minerals Chlorinating the water supply should minimize the problem See EXTENDED NON USE PERIODS NOTE Ano...

Page 23: ...mith provided vent cap Check for bent missing or mislocated pilot shield natural gas units only Replace or reposition Check outer door seal Replace gasket if missing Tighten screws if loose Install gasket properly if misinstalled NOT ENOUGH 1 Incorrect burner orifice Check orifice size Replace with correct size HOT WATER 2 No gas to main burner Check gas supply Correct as needed Check thermostat o...

Page 24: ...t thereof including freezing fire floods or lightning any misuse abuse or alteration of it any operation of it in a modified form or any attempt to repair tank leaks or parts will void this warranty SERVICE AND LABOR RESPONSIBILITY UNDER THIS LIMITED WARRANTY THE WARRANTOR WILL PROVIDE ONLY A REPLACEMENT WATER HEATER OR PART THEREOF THE OWNER IS RESPONSIBLE FOR ALL OTHER COSTS Such costs may inclu...

Page 25: ...25 NOTES ...

Page 26: ...26 NOTES ...

Page 27: ...27 ...

Page 28: ...28 500 TENNESSEE WALTZ PARKWAY ASHLAND CITY TN 37015 PHONE 1 800 433 2545 FAX 1 800 433 2515 www aosmithwaterheaters com email parts hotwater com ...

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