Installation and Operation Manual

Rinnai Tankless Water Heater Installation and Operation Manual 19
4.3.5 Freeze Protection




󰀨








󰀨



Figure 8: Freeze Protection Piping Diagram
Route Drain Per Local Code
Cold Water
Supply Line
1/2 in. Normally Open Solenoid Valve
Hot Water
Supply Line
3/4 in. Normally Closed Solenoid Valve
Legend
Vacuum Breaker
Pressure Relief Valve
Union
Check Valve
Ball Valve
Solenoid Valve
Drain Valve
* Position vacuum breaker
above water heater.
Gas Supply
Freeze Protection Piping Diagram
Vacuum Breaker *



Union




Open Solenoid




Line

Closed Solenoid



