John Wood JW375T75N-AV, Instruction Manual

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2
SAFE INSTALLATION, USE AND SERVICE......................3
APPROVALS ......................................................................3
GENERAL SAFETY INFORMATION ..................................4
INTRODUCTION ................................................................5
Abbreviations Used .....................................................5
Qualified Installer or Service Agency ...........................5
Preparing for the New Installation ...............................5
INSTALLATION CONSIDERATIONS ............................. 6-9
Rough In Dimensions ..................................................6
Thermometers .............................................................7
Facts to Consider About Location ...............................7
High Altitude ................................................................8
Clearances ..................................................................8
Insulation Blankets ......................................................9
Hard Water ..................................................................9
Circulation Pumps .......................................................9
INSTALLATION REQUIREMENTS ..................................10
Gas Supply Systems .................................................10
Gas Pressure Requirements .....................................10
Supply Gas Regulator ...............................................10
Mixing Valves ............................................................10
Water Piping .............................................................. 11
Closed Water Systems .............................................. 11
Thermal Expansion ................................................... 11
Temperature - Pressure Relief Valve ......................... 11
Filling the Water Heater .............................................12
Air Requirements.......................................................12
Unconfined Space .....................................................13
Confined Space .........................................................13
Fresh Air Openings for Confined Spaces ..................13
Outdoor Air Through Two Openings ..........................13
Outdoor Air Through One Opening ...........................13
Outdoor Air Through Two Horizontal Ducts ...............14
Outdoor Air Through Two Vertical Ducts ...................14
Air From Other Indoor Spaces ..................................14
Venting ......................................................................14
Gas Piping .................................................................16
Sediment Traps .........................................................17
LIGHTING & OPERATING INSTRUCTIONS ..............18,19
TEMPERATURE REGULATION ......................................20
FOR YOUR INFORMATION .............................................20
Start Up Conditions ...................................................20
Operational Conditions ..............................................21
PERIODIC MAINTENANCE .............................................22
Venting System Inspection ........................................22
Burner Inspection ......................................................22
Burner Cleaning ........................................................22
Housekeeping ...........................................................23
Anode Rod Inspection ...............................................23
Temperature-Pressure Relief Valve Test ...................23
Tank Cleanout Procedure ..........................................24
Service ......................................................................24
LEAKAGE CHECKPOINTS ..............................................25
TROUBLESHOOTING GUIDELINES ...............................26
WATER PIPING DIAGRAMS .......................................27-32
NOTES ........................................................................33-34
WARRANTY .....................................................................35
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