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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

¼

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

¼

2  

seconds

 

155°F 

About 1 second

 

Page 5

Summary of Contents for Indirect Water Heater

Page 1: ...g the indirect water heater into service This unit must be installed by licensed or authorized installers or technical personnel that service water heating equipment The indirect water heater must be...

Page 2: ...Section I Specifications 3 Section II General Informations 5 Section III Pre Installation 7 Section IV Installation 9 Section V Maintenance 12 Section VI Troubleshooting 13 Section VII Parts List 14...

Page 3: ...erature setting for normal residential use is 120 F Rheem recommends a tempering valve or anti scald valve be installed and used according to the manufacturer s directions to prevent scalding STID30 2...

Page 4: ...000 202 104 000 214 111 000 STID80 188 76 000 212 91 000 224 98 000 221 97 000 233 104 000 245 112 000 257 119 000 STID120 220 76 000 244 91 000 256 98 000 253 97 000 265 104 000 277 112 000 289 119 0...

Page 5: ...ited 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 inst...

Page 6: ...ter system When hydrogen is present there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow There should be no smoking or open flame near the faucet a...

Page 7: ...F and 200 F boiler water To determine the appropriate circulator for your system follow these three steps 1 Calculate the pressure drop of all straight pipe and fittings on the supply and return at th...

Page 8: ...imum coil output assume coil output boiler output listed in Tables 2 and 3 is not met the output first hour rating of the indirect water heater will not be met at the selected flow rate To approximate...

Page 9: ...minimized A flow check valve must be installed on the return line All piping to the inlet cold and outlet hot domestic water connections should be new copper with a minimum size of 1 2 ID for models S...

Page 10: ...tion cont CHECK VALVES ZONE CIRCULATORS ISOLATION VALVES ADDITIONAL ZONES INDIRECT CIRCULATOR INDIRECT WATER HEATER TO HEATING ZONE AIR SEPARATOR AIR VENT EXPANSION TANK COLD WATER INLET BOILER CIRCUL...

Page 11: ...m circulator stays off and the boiler must light to reach high limit WIRING NOTES 1 Dashed lines indicate low voltage 24 VAC 2 Use jumper wire between terminals 1 and 3 on R845 relay THERMOSTAT SPECIF...

Page 12: ...nd at least yearly once a time interval for inspection has been developed It is recommended to check the rod s six months after the heater is installed If the anode rod had reduced in size by two thir...

Page 13: ...HFN SRZHU VXSSO 5HSODFH DV QHFHVVDU DXOW WDQN DTXDVWDW 5HSODFH DTXDVWDW RLOHU F FOHV PRUH WKDQ WLPHV SHU GD GXULQJ KRWHVW PRQWKV FHVVLYH GHPDQG 5HGXFH GHPDQG RU FRQVLGHU ODUJHU WDQN DXOW DTXDVWDW 5HSO...

Page 14: ...n VIi parts list No Description Applicable Models 1 Anode All models 2 Anode Outlet STID 30 STID 40 STID 50 3 T P Relief Valve All models 4 Drain Valve All models 5 Aquastat All models Page 14 14 2 1...

Page 15: ...nt component part s to a convenient delivery point selected by Rheem near the place the original water heater or original component part s is located such as a local Rheem water heater retailer You mu...

Page 16: ...rranty in the event warranty service is needed Reasonable proof of the date of original installation or date of original purchase of your water heater whichever came first may be required to establish...

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