WH-2-RGE

For this application:

Pump should be controlled by an Aquastat, Timer or Combination Aquastat and Timer.

Pump to be sized to maintain circulation loop temperature.

The pump should be sized to overcome the pressure loss through the tank water heater, and supply and return plumbing in the circulation loop. Reference the section Pump Sizing for Circulation.

Pump to be of bronze or stainless construc- tion.

Tankless

Water Heater

Primary

Sub 1

Tankless
Equipment	List	QTY
Tankless		2
Water Heaters

Electronic Connection *

*Refer to Tankless Accessories and Model Applicability for electronic connection details.

Minimum 3/4 “ Hot Water Supply Line

Gas Supply Line

Minimum 3/4 “ Cold

Water Supply Line

	Important:	Building Supply
	Install return line to the hot	Building Supply
	Install return line to the hot
	supply line as close as possible	Gas or Electric
	to the Rinnai water heater	Tank Water
		Heater
		Expansion Tank

Drawing Number:

Drawing Date:

February 27, 2008

Domestic Hot Water - Circulation Systems

2 Tankless Water Heaters with Gas or Electric Tank Preferred Piping Installation

This is not an engineering drawing; it is intended only as a guide and not as a replacement for professional engineering project drawings. This drawing is not intended to describe a complete system. It is up to the

Key

contractor or engineer to determine the necessary components and configuration of the particular system to be installed. The drawing does not imply compliance with local building code requirements. It is the responsibility of the engineer or contractor to ensure that the installation is in accordance with all local building codes. Confer with local building officials before installation.

3/4" Ball Valve

3/4" Union

Check Valve

Pressure Relief Valve

Pressure Regulator

Circulating Pump

Boiler Drain Valve

SSolenoid Valve

ATO-705A-P, GT-305-NI, GT-705-NI, ATI-505-N, ATI-705A-N specifications

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