John Wood Commercial - AJWS - Manual (Page 2)

2
Your safety and the safety of others is very important.
We have provided many important safety messages in this manual and on your appliance.
Always read and obey all safety messages.
All safety messages will tell you what the potential hazard is, tell you how to reduce the
chance of injury, and tell you what can happen if the instructions are not followed.
This is the safety alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol and either the word
“DANGER” or “WARNING”.
DANGER
WARNING
You can be killed or seriously injured if you don’t immediately follow
instructions.
You can be killed or seriously injured if you don’t follow instructions.
Important Instructions
• Do not use this appliance if any part has been under water. Immediately call a qualified service technician. Water
heaters subjected to flood conditions or anytime the gas controls, main burner or electrical components have been
submerged in water require replacement of the entire water heater.
• Hydrogen gas can be produced in a hot water system served by this heater that has not been used for a long peri-
od of time (generally two (2) weeks or more). Hydrogen gas is extremely flammable and can ignite when
exposed to a spark or flame. To reduce the risk of injury under these conditions, it is recommended that the hot
water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to
the hot water system. Use caution in opening faucets. When hydrogen is present, there will probably be an unusual
sound such as air escaping through the pipe as the water begins to flow. There should be no smoking or open
flame near the faucet at the time it is open.
The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of California to publish a list of sub-
stances known to the State of California to cause Cancer, birth defects, or other reproductive harm, and requires busi-
nesses to warn of potential exposure to such substances.
WARNING: This product contains a chemical known to the State of California to cause cancer, birth defects, or other
reproductive harm.
This appliance can cause low-level exposure to some of the substances listed, including formaldehyde, carbon monox-
ide, and soot.
Table of Contents
Water Heater Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Combustion Air Supply and Ventilation . . . . . . . . . . . . . . . . . . . . . . 5-8
Water System Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-12
Gas Supply and Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-14
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Operating Your Water Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-19
Maintenance of Your Water Heater . . . . . . . . . . . . . . . . . . . . . . . 20-21
Trouble Shooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-23
Repair Parts Illustration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25