Recommended Piping for Circulation Systems
NOTE:
For residential and commercial applications, this piping arrange- ment maintains full warranty.
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. Reference the Rinnai Hot Water System Design Manual, Pump Sizing for Circula- tion.
Pump to be of bronze or stainless construction.
Rinnai | QTY | |
Equipment List | ||
Rinnai | 1 | |
Water Heaters |
| |
1 | ||
(3/4" Fittings Include: |
| |
2 | Unions, 2 Ball Valves, |
|
2 | Drain Valves and |
|
1 | Pressure Relief Valve.) |
|
3/4" Gas Connection |
| |
Gas Supply |
| |
Condensate drain line
Minimum 3/4" Cold Water Supply Line
Condensate
drain
IMPORTANT: Connect the building return line to the hot water supply line as close as possible to the Rinnai Water Heater.
Tank Water Heater to be Sized for Heat Loss of Circulation Loop.
Electric Water
Heater
Building Supply
Building
Fixtures
Expansion Tank
| 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.
24 | Manual - Rinnai Condensing Water Heaters |
