General Safety Precautions | Thermo Products guide

!General Safety Precautions

Be sure to read and understand the entire Use & Care Manual before attempting to install or operate this COMBOMAXMC unit. Pay particular attention to the following General Safety Precautions. Failure to follow these warnings could cause property damage, bodily injury or death. Should you have any problems understanding the instructions in this manual, STOP, and get help from a qualified installer or technician.

To meet commercial hot water needs, the aquastat on this water heater is adjustable up to 190°F. However, water temperatures over 125°F can cause severe burns instantly or death from scalds. 125°F is the preferred starting point for setting the control to supply general-purpose hot water.

Safety and energy conservation are factors to be considered when setting the water temperature on the aquastat. The most energy efficient operation will result when the temperature setting is the lowest that satisfies requirements.

Maximum water temperature occurs just after burner or the energy source has shut off. To find hot water temperature being delivered, turn on a hot water faucet and place a thermometer in the hot water stream.

The following chart details the relationship of water temperature and time with regard to scald injury and may be used as a guide in determining the safest water temperature for your applications.

TIME TO SCALDING VS TEMPERATURE

RELATIONSHIP

Temperature	Time to scalding

120°F	Over 5 minutes
125°F	1-1/2 to 2 minutes
130°F	About 30 seconds
135°F	About 10 seconds
140°F	Less than 5 seconds
145°F	Less than 3 seconds
150°F	About 1-1/2 second
155°F	About 1 second

With kind permission from the Shriners Burn Institute

The temperature of the water in the heater can be set by turning the temperature dial on the aquastat. To comply with safety regulations the aquastat was set at its lowest setting before water heater was shipped from the factory.

!DANGER

There is a hot water scald potential if the aquastat is set too high. When this water heater is supplying general purpose hot water requirements for use by individuals, a thermostatically controlled mixing valve for reducing point-of-use water temperature is recommended to reduce the risk of scald injury. Contact a licensed plumber or local plumbing authority for further information.

COMBOMAXMC Electric boiler Set-up, use and care guide (revised January 2006), Page 14.