Recommended Piping for Circulation Systems
Notes:
PLEASE NOTE FOR RESIDENTIAL AND COMMERCIAL APPLICATIONS, THIS PIPING ARRANGEMENT MAINTAINSFULL 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.
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.
Rinnai
Water Heater
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
Minimum 3/4" Cold Water Supply Line
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 for and configuration of the particular system being installed. The drawing does not imply compliance with local building code requirements. It is the engineer/contractor responsiblity to ensure the installation is in accordance with all local building codes. Confer with local building officials before installation.
24 | VA Series Outdoor LS Manual |
