John Wood Direct Vent - Manuel (Page 2)

2 www. johnwoodwaterheaters .com
TABLE OF CONTENTS
SAFE INSTALLATION, USE AND SERVICE . . . . . . . . . . . 3
GENERAL SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Qualifi ed Installer Or Service Agency . . . . . . . . . . . . 6
Preparing For The Installation . . . . . . . . . . . . . . . . . . 6
TYPICAL INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . 7
Get To Know Your Water Heater - Gas Models
(List Referencing Figures 1-5). . . . . . . . . . . . . . . . . . 7
Replacement Parts And Deliming Products . . . . . . . 8
Combo Heating Inlet And Outlet Side Taps. . . . . . . . 8
High Limit Controls (Energy Cut Off). . . . . . . . . . . . . 8
Thermostat/Water Temperature
LOCATING THE NEW WATER HEATER . . . . . . . . . . . . . . 9
Facts To Consider About The Location . . . . . . . . . . . 9
External/Internal Damage . . . . . . . . . . . . . . . . . . . . . 9
Air Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Confi ned Space Installations. . . . . . . . . . . . . . . . . . 10
Clearances To Combustibles
Floors With Carpeting
Clearance For Servicing
Chemical Vapour Corrosion . . . . . . . . . . . . . . . . . . 10
Storage Of Flammable Liquids . . . . . . . . . . . . . . . . .11
Insulation Blankets . . . . . . . . . . . . . . . . . . . . . . . . . .11
Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Water Pressure
Mixing Valves
INSTALLING THE NEW WATER HEATER . . . . . . . . . . . 13
Water Piping Installation . . . . . . . . . . . . . . . . . . . . . 13
Closed Water Systems . . . . . . . . . . . . . . . . . . . . . . 13
Thermal Expansion . . . . . . . . . . . . . . . . . . . . . . . . . 13
Temperature-Pressure Relief Valve. . . . . . . . . . . . . 14
T&P Valve Discharge Pipe Requirements:
Temperature-Pressure Relief Valve And
Pipe Insulation
Filling The Water Heater . . . . . . . . . . . . . . . . . . . . . 15
Space Heating And Potable Water Systems . . . . . . 16
Combo Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
System Requirements
Installation
Gas Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Sediment Trap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
High Altitude Installations . . . . . . . . . . . . . . . . . . . . 19
Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Vent Terminal Clearances . . . . . . . . . . . . . . . . . . . . 20
DV Termination Safety Cover . . . . . . . . . . . . . . . . . 21
Vent Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Locating Clearance Hole For Vent . . . . . . . . . . . . . 21
Standard Vent Arrangement . . . . . . . . . . . . . . . . . . 21
Vent Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Securing Vent Termination Assembly To
The Exterior Wall. . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Vent Restricter Plate . . . . . . . . . . . . . . . . . . . . . . . . 22
Uncompressing The Corrugated Tubing . . . . . . . . . 22
Vent Connection To The Water Heater . . . . . . . . . . 23
Offset Vent Arrangement . . . . . . . . . . . . . . . . . . . . . 23
Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . 25
LIGHTING INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . 26
TEMPERATURE REGULATION . . . . . . . . . . . . . . . . . . . 27
Temperature Regulation . . . . . . . . . . . . . . . . . . . . . 27
Temperature Adjustment
Operating The Temperature Control System. . . . . . 27
Water Temperature Adjustment
Operating Modes And Settings
FOR YOUR INFORMATION. . . . . . . . . . . . . . . . . . . . . . . 28
External Damage . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Start Up Conditions . . . . . . . . . . . . . . . . . . . . . . . . . 28
Condensate
Smoke/Odour
Thermal Expansion . . . . . . . . . . . . . . . . . . . . . . . . . 28
Strange Sounds . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Operational Conditions . . . . . . . . . . . . . . . . . . . . . . 29
Smelly Water
“Air” In Hot Water Faucets
High Water Temperature Shut Off System
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Housekeeping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Flood Damage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Venting System Inspection . . . . . . . . . . . . . . . . . . . 30
Pilot And Main Burner . . . . . . . . . . . . . . . . . . . . . . . 30
Burner Flames. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Servicing The Water Heater . . . . . . . . . . . . . . . . . . 31
Removing And Replacing The Gas Control Valve/
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Removing The Gas Control Valve/Thermostat:
Replacing The Gas Control Valve/Thermostat:
Removing The Manifold/Burner Assembly . . . . . . . 31
Removing The Burner From The Manifold/Burner
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Natural Gas (Low Nox) & Propane (LP) Gas Burner
Replacing The Pilot/Thermopile Assembly . . . . . . . 32
Replacing The Manifold/Burner Assembly . . . . . . . 33
Piezoelectric Igniter System . . . . . . . . . . . . . . . . . . 34
Testing The Igniter System . . . . . . . . . . . . . . . . . . . 34
Temperature-Pressure Relief Valve Test . . . . . . . . . 34
Draining,
Refi lling And Flushing . . . . . . . . . . . . . . . 34
To Drain The Water Heater Storage Tank
To Refi ll The Water Heater Storage Tank
To Flush The Water Heater Storage Tank
Drain Valve Washer Replacement . . . . . . . . . . . . . 35
Anode Rod Maintenance. . . . . . . . . . . . . . . . . . . . . 35
To Remove The Anode Rod:
To Install The Anode Rod:
LEAKAGE CHECKPOINTS . . . . . . . . . . . . . . . . . . . . . . . 37
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
REFERENCE PARTS LISTING . . . . . . . . . . . . . . . . . . . . 38
TROUBLESHOOTING GUIDELINES. . . . . . . . . . . . . . . . 40
NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44