Thermo Products COMBOMAX Models from 8 kW to 24 kW : 240 Volts ( single phase ) - Manual (Page 14)

COMBOMAX MC Electric boiler Set-up, use and care guide (revised January 2006) , Page 14.
General Safety Precautions
Be sure to read and understand the entire Use & Care Manual before attempting to install
or operate this COMBOMAX
MC
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.
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.
DANGER !
!