System Design Drawings

Aquastat Connection
officials before installation.
11.13.2018
SH
12.15.2018
return line to prevent cold water infiltration.
Reference the Common Vent Installation
Manual for common vent options where
For this application:
Do not use electronic cascade controls
with storage recovery system.
Reference mixing valve manufacturer
installation instructions regarding
recirculation.
Balanced piping is critical to maintain even
operation of all water heaters. Ensure
Plumbing system is balnced or piped in
reverse return as shown.
Ensure check valve is installed on hot water
applicable.
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 adjustable
Aquastat or Combination Aquastat and Timer.
Aquastat should have 10-20F differential of
water heater set temperature.
Pump should be sized to maintain circulation
loop temperature.
Circulation flow rate should not exceed 3
GPM per water heater and should be no more
than 8 GPM where multiple water heaters are
installed.
Pump should be sized to overcome the
pressure loss through the 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.
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
AB
THIRD ANGLE PROJECTION
D
C
B
A
A
B
C
D
1
2
3
4
5
6
7
8
8
7
6 5
4
3
2
1
PROHIBITED.
CHS199-5-CIRC
MACHINED X.XXX =
SHEET 1 OF 1
0.005
RINNAI AMERICA CORPORATION
Systems Design Manual
103 INTERNATIONAL DRIVE
PEACHTREE CITY, GA 30269
12.15.2018
1-800-621-9419
RS
Angle =
UNLESS OTHERWISE SPECIFIED:
INTERPRET GEOMETRIC
SCALE: NTS
DO NOT SCALE DRAWING
WEIGHT:
0.010
TOLERANCING PER:
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
COMMENTS:
DATENAME
TITLE:
SIZE
B
DWG. NO.
REV
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
PROPRIETARY AND CONFIDENTIAL
Low Temp Return
Aquastat Connection
Hot Water Supply
Gas Supply
Cold Water Supply
Low Temp Supply
High Temp Supply
High Temp Return
Commercial Hybrid System
Five Unit Circulation