46
CR60-IM.v0429.4
Freeze Prevention / Insulation
• In normal operation, freezing is prevented within the device automatically unless the outside
temperature without wind is below -30°F (-35°C) for indoor installation or -4°F (-20°C) for outdoor
installations.
• For models installed in an area where the outside temperature can approach freezing conditions of
-30°F (-35°C) or outdoor -4°F (-20°C) or below, then additional protection measures must be used. For
temporary freeze protection measures, refer to the Water Heater Owner’s Guide.
• The built-in freeze prevention on the water heaters require power to function.
• When supplying combustion air from the indoors, the room temperature must be greater than 32°F
(0°C) to prevent freezing and the room inside must not have negative pressure.
• The freeze prevention heaters will not prevent the plumbing external to the unit from freezing.
Insulate or apply heating materials to both the cold water and the hot water supply piping to prevent
freezing during cold weather and to prevent heat loss through the piping.
To Next Page
