Raypak 0133-4001 WH, Installation And Operating Instructions Manual

Page: 31 / 53

General Safety Precautions
Maximum water temperatures occur just after burner
has shut-off. To determine the water temperature
being delivered, turn on the hot water only, place a
thermometer in the stream, and read the thermom-
eter.
There is a hot water scald potential if the thermostat is
set too high.
NOTE: When this heater 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.
31
To meet commercial water use needs, the thermostat
on this water heater is adjustable up to 190°F. How-
ever, water temperatures over 125 °F can cause in-
stant severe burns or death from scalds. This is the
preferred temperature setting when supplying general
purpose hot water.
Safety and energy conservation are factors to be
considered when setting the water temperature on the
thermostat. The most energy-efficient operation will
result when the temperature setting is the lowest that
satisfies the needs consistent with the application.
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.
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 Shriners Burn Institute
TIME/TEMPERATURE RELATIONSHIPS IN
SCALDS
The temperature of the water in the heater can be
regulated by setting the temperature dial on the front of
the thermostat. To comply with safety regulations, the
thermostat was set at its lowest setting before the
heater was shipped from the factory. The illustration
below shows how to adjust the water temperature
using the thermostat.
Water temperature over 125°F can
cause instant severe burns or death
from scalds.
Children, disabled, and elderly are
at highest risk of being scalded.
See instruction manual before set-
ting temperature at water heater.
Feel water before bathing or show-
ering.
Temperature limiting valves are
available, see manual.
To adjust the water tem-
perature, insert a small
straight screwdriver into
slotted screw in hole in front
of thermostat and turn
wheel to desired setting.
Thermostat is adjustable
up to 190°F.
CAUTION!! - Hotter water
increases the risk of
SCALDING!