Optional Piping for Circulation Systems
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.
A minimum of 3 GPM flow is recommended for the circulation system.
The pump should be sized to overcome the pressure loss through the Rinnai water heater, supply and return plumbing. Refer - ence the Rinnai Hot Water System Design Manual, Pump Sizing for Circulation.
Pump to be of bronze or stainless construc - tion.
Condensate drain line
Note: Water heater outlet temperature | Condensate |
cannot be adjusted when | drain |
circulation pump is running. |
|
Minimum 3/4" Hot Water |
|
Supply Line |
|
| (Optional) |
| |
| Storage Tank |
| (To eliminate cold water |
| sandwich effect caused by |
| frequent On/Off operation) |
Building Fixture Outlets |
NOTE:
For residential and commercial applications, this piping arrangement reduces the warranty to the following:
3 years on heat exchanger
3 year on parts
Full warranty will be maintained if an
Rinnai |
| |
Equipment List | QTY | |
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
Minimum 3/4 “ Cold Water Supply Line
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.
Manual - Rinnai Condensing Water Heaters | 25 |
