Rheem Indirect Water Heater User Manual download pdf (Page 9)

BOILER

SYSTEM

SUPPLY

CIRCULATOR

PUMP

BOILER

SYSTEM

RETURN

BOILER

COLD

INLET

WATER HEA T ER

INDIRECT

HOT OUT

DOMESTIC

1 1/2"

BOILER

FROM

BOILER

CHECK

VA L V E

BOILER

SUPPLY

SYSTEM

DOMESTIC

3/4"

HOT OUT

INDIRECT

WATER HEA T ER

BOILER

FROM

COLD

INLET

3/4"

VA L V E

CHECK

PUMP

CIRCULATOR

RETURN

SYSTEM

BOILER

1" NPT

BOILER

SYSTEM

SUPPLY

CIRCULATOR

PUMP

BOILER

SYSTEM

RETURN

BOILER

COLD

INLET

WATER HEA T ER

INDIRECT

HOT OUT

DOMESTIC

1 1/2"

BOILER

FROM

BOILER

CHECK

VA L V E

BOILER

SUPPLY

SYSTEM

DOMESTIC

3/4"

HOT OUT

INDIRECT

WATER HEA T ER

BOILER

FROM

COLD

INLET

3/4"

VA L V E

CHECK

PUMP

CIRCULATOR

RETURN

SYSTEM

BOILER

1" NPT

Page 9

Figure 7: STID80, STID120 water connections

SECTION IV: INSTALLATION

WATER CONNECTIONS

All piping between the boiler and the indirect water heater should be new copper with a

minimum size of 3/4” ID for models STID30, STID40, and STID50. Use 1” minimum copper for

models STID80 and STID120. Elbows should be 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 STID30, STID40, and STID50. Use 3/4” ID minimum for

models STID80 and STID120.

All piping should conform to local codes and ordinances. At a minimum, refer to ILHR 84 code if

local codes are not in place. It is recommended that all piping be adequately insulated with

approved material to ensure minimum heat loss. If a re-circulation line is used for domestic

water, be certain that all lines are well insulated and the circulator is temperature controlled.

Install isolation valves to permit proper servicing. It is also recommended to install a union on

the domestic outlet to facilitate replacement of the hot outlet / anode nipple on models STID30,

STID40, and STID50.

See Figures 6 and 7 for proper water connection installation.

NOTICE: Indirect water heater may be connected to a steam

boiler provided that all piping to and from

the boiler are below the water line of the boiler.

Boiler must also be protected by a low water

cut off safety device.

Figure 6: STID30, STID40, STID50 water connections

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Rheem Indirect Water Heater User Manual Page 9

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