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SECTION II: GENERAL INFORMATION
LOCATION
The indirect water heater should be located in a central location to the piping system, as close as
practical to the boiler and in an area not subject to freezing temperatures. Leave sufficient space
for servicing and maintaining the indirect water heater.
NOTICE: Long heating supply runs can lengthen recovery times.
WATER TREATMENT/FILTRATION
In areas where poor water conditions are suspected (i.e. lime, iron, and other minerals), it is
essential that the water be tested and appropriate action taken to prevent damage to the indirect
water heater and ensure the quality of the water.
TEMPERATURE CONTROL
Water temperature from the heat source / boiler to the indirect water heater is controlled by an
immersion aquastat. This control operates the circulator, and provides limited control for
domestic hot water temperature. The proper temperature setting for domestic hot water use is
120°F/49°C. If hotter water is required a tempering device or anti-scald device must be installed at
the domestic hot water outlet of the indirect water heater or at the point of use.
CAUTION: Hot water in excess of 120°F
can cause scalding!
Rheem recommends a tempering valve or anti-scald valve be installed and used according to the
manufacturer’s directions to prevent scalding. Many state and local codes now require
installation of these devices. The tempering valve or anti-scald valve will ensure potable water
temperatures at the desired set point with a higher degree of accuracy.
IMMERSION CONTROL
STID30
•
STID40
•
STID50
•
STID80
•
STID120
APPROXIMATE
TEMPERATURE/TIME
RELATIONSHIPS TO
SCALDING
120°F More than 5 minutes
125°F 1
1
¼2 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
¼2 seconds
155°F About 1 second
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