Raypak 260-401 Installation And Operating Instructions Manual page 5

To meet commercial hot water requirements, the
tankstat is adjustable up to 190°F. However, water
temperatures over 125°F. can cause severe burns
instantly or death from scalds. This is the preferred
starting point for setting the control for supplying gen-
eral purpose hot water.
Safety and energy conservation are factors to be
considered when setting the water temperature on the
tankstat. The most energy efficient operation will result
when the temperature setting is the lowest that satis-
fies the needs consistent with the application.
Water temperature over 125°F can cause
severe burns instantly or death from
scalds.
Children, disabled and elderly are at high-
est risk of being scalded.
See instruction manual before setting
temperature at tankstat.
Feel water before bathing or showering.
Temperature limiting valves are available,
see manual.
Maximum water temperatures occur just after burner
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 and read the
thermometer.
General Safety Precautions
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/TEMPERATURE
SCALDS
The temperature of the water in the storage tank boiler
can be regulated by setting the temperature dial on
front of the tankstat. To comply with safety regulations,
the tankstat was set at its lowest setting before ship-
ment from the factory. The illustration below illustrates
the tankstat and how to adjust the water temperature.
To adjust the water temperature,
insert a small straight screwdriver
into slotted screw in hole in front
of tankstat and turn wheel to
desired setting. Thermostat is
adjustable up to 190°F.
CAUTION!! - Hotter water
increases the risk of
SCALDING!
There is a Hot Water SCALD Potential if the tankstat is
set too high.
NOTE: When this water is supplying general purpose
hot water requirements for use by individuals, a ther-
mostatically controlled mixing valve for reducing point
of use water temperature is recommended to reduce
the risk of scald injury. Contact a licensed plumber or
the local plumbing authority for further information.
5
Temperature Time to Produce Serious Burn
120°F. More than 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 seconds
155°F. About 1 second
Table courtesy of Shiners Burn Institute
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