Optional Piping For Circulation Systems - Rinnai RC80HPE Operation And Installation Manual

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.
Note:
Water heater outlet temperature
cannot be adjusted when
circulation pump is running.
Minimum 3/4" Hot Water
3/4" Ball Valve
3/4" Union
Check Valve
Pressure Relief Valve
Condensate drain line
Condensate
drain
Supply Line
(Optional)
2-6 Gallon
Storage Tank
(To eliminate cold water
sandwich effect caused by
frequent On/Off operation)
KEY
Pressure Regulator
Circulating Pump
Boiler Drain Valve
S
Solenoid Valve
Manual - Rinnai Condensing Water Heaters
NOTE:
For residential and commercial
applications, this piping
arrangement reduces the warranty
to the following:
Full warranty will be maintained if
an on-demand recirculation
system in incorporated. Refer to
the Limited Warranty.
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.)
Minimum 3/4 " Cold Water Supply Line
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.
3 years on heat exchanger
3 year on parts
QTY
1
1
25