42
Page
Normal Operation
Owner's Guide
FREEZE PROTECTION SYSTEM
•
This unit comes equipped with heating blocks to protect it from damages associated with freezing.
•
For this freeze protection system to operate, there has to be electrical power to the unit. Damage to the heat
exchanger caused by freezing temperatures due to power loss is not covered under the warranty. In cases where
power losses can occur, consider the use of a backup power supply.
•
The freeze protection system will activate when the freeze protection thermostat senses air temperature below
36.5 °F (2.5 °C).
•
For the 110 Indoor, 310 Indoor, and 510 Indoor models:
•
In any areas subject to freezing temperatures, the manufacturer highly recommends an indoor instal-
lation with an indoor model. In such an installation, freezing issues can only occur if cold air enters
through the venting into the heat exchanger, whether by negative pressures within the installation loca-
tion or by strong outside winds.
•
The manufacturer also highly recommends the use of a backflow preventer (sold separately) to mini-
mize the amount of cold air entering through the exhaust venting when the water heater is off.
•
It is the installer’s responsibility to be aware of freezing issues and take all preventative measures. The manufac-
turer will not be responsible for any damage to the heat exchanger as a result of freezing.
•
If you will not be using your heater for a long period of time:
1.
Completely drain the water out of the unit. Refer to p. 43.
2.
Disconnect power to your heater.
This will keep your unit from freezing and being damaged.
Only pipes within the water heater are protected by the freeze protection system.
Any water pipes (hot or cold) located outside the unit will not be protected. Properly
protect and insulate these pipes from freezing.
NOTICE
MAINTENANCE AND SERVICE
•
Clean the cold-water inlet filter. (Refer to Unit draining and filter cleaning section on this page.)
•
Be sure that all openings for combustion and ventilation air are not blocked.
•
The venting system should be checked annually for any leaks, corrosion, blockages or damage.
•
The burner should be checked annually for dust, lint, grease or dirt.
• Keep the area around the water heater and terminations 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.
•
Visually check the burner flames (see below) through the burner window in the burner assembly located at the
middle of the water heater.
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.
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 serious personal injury or death.
WARNING
Satisfactory
Blue flame
Unsatisfactory
Flame lifting
above the
burner
Unsatisfactory
Red or Yellow
flame