Rinnai Water Heater REU-V2520FFUD - Manual (Page 33)

103 International Drive
Peachtree City, Georgia 30269
RINNAI WATER HEATERS
Domestic Hot Water with Circulation
1 Rinnai Water Heater
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
KEY
Minimum 3/4" Hot Water
Supply Line
Building Fixture Outlets
(Optional)
2-6 Gallon
Storage Tank
(To eliminate cold water
sandwich effect caused by
frequent On/Off operation)
Pump Should be Controlled by an
Aquastat, Timer or Combination
Aquastat and Timer
Pump to be sized for 3.0 gpm flow @ 12 feet head. Flow Balancing
Valve to be adjusted to 3 GPM flow through water heater with no hot
water taps open. Pump to be of Bronze or Stainless Construction.
Cold Water Supply and Circulation Return Lines Must Be 3/4"
Tubing Throughout Circulation Loop.
Note:
Water heater outlet temperature
cannot be adjusted when
circulation pump is running.
QTY
1
1
1
Expansion Tank
Rinnai
Water Heater
Note:
PLEASE NOTE FOR RESIDENTIAL
APPLICATIONS, THIS PIPING
ARRANGEMENT REDUCES
WARRANTY TO THE FOLLOWING:
3 Years On Heat Exchanger
3 Years On Parts
Rinnai
Equipment List
(Residential and
Commercial)
Rinnai
Water Heaters
(Indoor)
MC-91 Controller
(Included)
MC-100V and BC-100V
Controllers Optional
RIK-KIT (Optional)
(3/4" Fittings Include:
2 Unions, 2 Ball Valves,
2 Drain Valves and
1 Pressure Relief Valve.)
3/4" Gas Connection
Commercial Application Warranty:
5 Years On Heat Exchanger
5 Years On Parts
Gas Supply
Venting Equipment List
(Residential and
Indoor Unit
Please Review Venting
Instructions/Guidelines for
Proper Components and
Installation.
Commercial)

Rinnai America FF Models
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S
OPTIONAL PIPING FOR CIRCULATION SYSTEMS