System Design Drawings

cascading instructions.
Ensure tankless heaters are installed in
parallel to maximize system output.
Contact Application Engineering Center of
consistent hot water delivery.
Excellence if alternate piping arrangements
will be considered.
Balancing of hot water risers may be
necessary after installation to ensure
Note:
Condensate piping shall be CPVC or PVC
material and shall not be smaller than the
drain connection on the appliance.
Components of the condensate drainage
shall be CPVC or PVC material. All
components shall be selected for the
pressure and temperature rating of the
installation.
Where the drain pipes from more than one
unit are manifolded together for
condensate drainage, the pipe or tubing
shall be sized in accordance with an
approved method as dictated
by local codes.
Condensate must be disposed of according
to local codes.
Pump should be controlled by an Aquastat,
Timer or Combination Aquastat and Timer.
Pump should be sized to maintain
circulation loop temperature.
Pump should be sized to overcome the
pressure loss through the tankless water
heater, supply, and return plumbing.
Reference the Rinnai Hot Water System
Design Manual for pump sizing guidelines.
Pump should be of bronze or stainless
construction.
Reference the Common Vent Installation
Manual for common vent options. Air intake
shown for direct vent installations only.
Reference Water Heater IO Manual for
This is not an engineering drawing; it is intended only as a guide and not
as a replacement for professional engineering project drawings. This
drawing is not intended to describe a complete system. It is up to the
contractor or engineer to determine the necessary components and
configuration of the particular system to be installed. The drawing does
not imply compliance with local building code requirements. It is the
responsibility of the engineer or contractor to ensure that the installation is
in accordance with all local building codes. Confer with local building
officials before installation.
AB
D
C
B
A
A
B
C
D
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PROPRIETARY AND CONFIDENTIAL
1-800-621-9419
12.15.2018RS
Angle =
THIRD ANGLE PROJECTION
11.16.2018
PROHIBITED.
MACHINED X.XXX =
INTERPRET GEOMETRIC
DO NOT SCALE DRAWING
0.005
WH-2-CIRC
RINNAI AMERICA CORPORATION
103 INTERNATIONAL DRIVE
SHEET 1 OF 1
PEACHTREE CITY, GA 30269
Systems Design Manual
0.010
TOLERANCING PER:
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
COMMENTS:
DATENAME
TITLE:
SIZE
B
DWG. NO.
REV
WEIGHT: SCALE: NTS
UNLESS OTHERWISE SPECIFIED:
SH
TOLERANCES:
Sheet Metal X.XX = 0.030
X.XXX = 0.010
Fraction = 1/32
Angle = 1.0
THE INFORMATION CONTAINED IN
THIS DRAWING IS THE SOLE
PROPERTY OF RINNAI AMERICA. ANY
REPRODUCTIONIN PART OR AS A
WHOLE WITHOUT THE WRITTEN
PERMISSION OF RINNAI AMERICA IS
12.15.2018
Building Outlets
Cold Water Supply
Condensate Drain Line As Approproate
Gas Supply
Two Unit Circulation
Hot Water Supply
Aquastat Connection
Rinnai Tankless
Applies to HE, HE+, SE, and Sensei Models