Rheem Indirect Water Heater warranty Section IV Installation, 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.

		BOILER
3/4"	3/4"	SYSTEM
		SUPPLY
DOMESTIC	COLD	CIRCULATOR
HOT OUT	INLET	PUMP

INDIRECT

WATER HEATER

FROM BOILER 1" NPT

TO	CHECK
BOILER
1" NPT	VALVE

BOILER

BOILER

SYSTEM

RETURN

BOILER

SYSTEM

SUPPLY

CIRCULATOR

PUMP

Figure 6: STID30, STID40, STID50 water connections	1 1/2"
	DOMESTIC
	HOT OUT
		INDIRECT
		WATER HEATER
		FROM
		BOILER
NOTICE: Indirect water heater may be connected to a steam		1" NPT
boiler provided that all piping to and from	1"
the boiler are below the water line of the boiler.	COLD
	INLET	TO
Boiler must also be protected by a low water		BOILER
		1" NPT

cut off safety device.

BOILER

BOILER

SYSTEM

CHECKRETURN VALVE

Figure 7: STID80, STID120 water connections

Page 9