MAINTENANCE
On-Demand Water Heater Installation Manual and Owner’s Guide
67
MAINTENANCE AND SERVICE
• Turn off the electrical power supply and close the manual gas shutoff valve and the
manual water control valve before servicing.
• Failure to do so could result in severe personal injury, or death.
WARNING
• Clean the cold-water/return inlet filters. (Refer to the Unit Draining and Filter Cleaning Section on p. 68.)
• The intake and exhaust venting MUST clear of any blockages. Remove any blockage.
• The intake and venting system should be checked annually for any leaks, corrosion, blockages, or damage.
Replace any damaged section of venting and clear any blockage.
• The burner should be checked annually for dust, lint, grease or dirt.
• Keep the area around the water heater clear. Remove any combustible materials, gasoline or any flammable
vapors and liquids.
• If the relief valve discharges periodically, it may be due to thermal expansion in a closed water supply system.
Contact the water supplier or local plumbing inspector on how to correct this situation.
• The screen on the rain protection tray should be inspected annually and cleaned if needed.
• Visually check of burner flames (see below) through the burner window in the burner assembly located at the
middle of the water heater.
Satisfactory
"Short and stable light blue flame
with red hot spots on the knit
burner"
Unsatisfactory due to air-rich
"Lifting blue flame from the
knit burner and vibration noise
sometimes occurs.
Unsatisfactory due to gas-rich
"
Short lifting pale light blue
flame with red flame from the
knit burner"
The manufacturer recommends having the unit checked once a year or as necessary by a licensed technician. If
repairs are needed, any repairs should be done by a licensed technician.
-Measuring inlet gas pressure-
1. Turn off all electric power to the water heater if service is to be performed.
2. Turn the manual gas valve located on the outside of the unit to the off position.
3. Failure to follow these steps could lead to fire or explosion, resulting in personal injury or death.
WARNING
The water heater cannot perform properly without sufficient inlet gas pressure. Below are instructions
on how to
check the inlet gas pressure.
THIS IS ONLY TO BE DONE BY A LICENSED PROFESSIONAL
.
-Regular maintenance-
Pressure port
1. Turn off all electric power to the water heater.
2. Shut off the manual gas valve on the gas supply line.
3. Remove the front cover and remove the screw as shown in the following to pull out the
PCB. (Figure 1 on p. 68)
Summary of Contents for 160X3P
Page 84: ...7J8071 1 2000570774 REV B...
