Rinnai Comprehensive Guide on Water Heater Freeze Protection

Freeze Protection Piping

Vacuum

Breaker

Rinnai

Water Heater

3/4" Gas Connection

NOTE:

Heat trace ALL water pipe and fittings located outside home (attic, crawl space) or building structure. (ALL water pipe and fittings shown above the dashed line in the drawing.)

Gas Supply

NOTE:

ALL pipe and fittings shown below dashed line should be located inside home or building structure.

The vacuum breaker line should be located inside the building structure.

Minimum 3/4" Hot Water

Supply Line

1/2" Minimum

Normally Open

Solenoid Valve

S

3/4" Minimum

Normally Closed

Solenoid Valve

S

Route to Floor Drain

Minimum 3/4"

Cold Water

Supply Line

	KEY
3/4" Ball Valve	Pressure Regulator
3/4" Union	Circulating Pump
Check Valve	Boiler Drain Valve
Pressure Relief Valve	S Solenoid Valve

This is not an engineered drawing. It is intended only as a guide and not as a replacement for professionally engineered project drawings. This drawing is not intended to describe a complete system. It is up to the contractor/engineer to determine the necessary components and configuration of the particular system being installed. This drawing does not imply compliance with local building code requirements. It is the responsibility of the contractor/engineer to ensure installation is in accordance with all local building codes. Confer with local building officials before installation.

VB Series Indoor LS Manual 23