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VA Series Outdoor LS Manual 25
Optional Piping for Circulation Systems
This is not an engineereddrawing, it is intended only as a guideand
not as a replacement for professionally engineered project drawings.
This drawing isnot intended to describe a complete system, it isup
to the contractor/engineer to determine thenecessary components
for and configuration of the particular system beinginstalled. 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
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(Optional)
2-6 Gallon
Storage Tank
(To eliminate cold water
sandwich effect causedby
frequent On/Off operation)
Note:
Water heater outlet temperature
cannot be adjusted when
circulation pump is running.
QTY
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Rinnai
Water Heater
Rinnai
Equipment List
Rinnai
Water Heaters
RIK-KIT (Optional)
(3/4" Fittings Include:
2 Unions, 2 Ball Valves,
2Drain Valves and
1Pressure Relief Valve.)
3
/
4
"
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PLEASE NOTE THIS PIPING
ARRANGEMENT REDUCES
RESIDENTIAL AND COMMERCIAL
WARRANTY TO THE FOLLOWING:
3Years On Heat Exchanger
3YearsOnParts
(Full warrantywill be maintained if an
on-demand recirculation
system is incorporated.
Refer to the Limited Warranty.)
Minimum 3/4" Cold Water Supply Line
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.