Rinnai REU-VA3237FFU User Manual

 

24 

VA Series Indoor LS Manual 

  Recommended Piping for Circulation Systems

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.

Pressure Relief Valve

3/4" Ball Valve

3/4" Union

Check Valve

S

Pressure Regulator

Circulating Pump

Solenoid Valve

Boiler Drain Valve

Minimum 3/4" Cold Water Supply Line

Electric Water

Heater

Building

Fixtures

Building Supply

Expansion Tank

Gas Supply

QTY

1

1

Rinnai
Equipment List

Rinnai
Water Heaters

RIK-KIT (Optional)
(3/4" Fittings Include:
2 Unions, 2 Ball Valves,
2 Drain  Valves and
1 Pressure  Relief Valve.)

3/4" Gas Connection

Tank Water Heater to be Sized for
Heat Loss of Circulation Loop.

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 heate r,
and supply and return plumbing.  Reference
the Rinnai Hot Water System Design
Manual, Pump Sizing for Circulation.

Pump to be of bronze or stainless construc -
tion.

IMPORTANT: Connect the building
return line to the hot water supply line
as close as possible to the Rinnai Water
Heater.