Table of Contents
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Welcome
Thank you for purchasing Rinnai's Demand Duo™
Commercial Hybrid Water Heating System. This manual
provides information on the installation, operation, and
maintenance of Rinnai's Demand Duo™ Commercial
Hybrid Water Heating System. Read this manual
completely before installing or operating the system.
This manual is a supplement to the Installation and
Operation Manual for Commercial CU199 Condensing
Tankless Water Heaters; refer to the CU199 manual for
complete water heater details, including:
•
Parameter Settings (High Altitude Adjustment, Vent
Length Adjustment, and more)
•
Temperature Controller Installation
•
Performance Data
•
Diagnostic Codes
If You Need Service
Contact your local dealer/distributor or call Rinnai
Customer Care at:
1-800-621-9419
Please have your full serial number or model number
available for product- or service-related issues.
To The Installer
•
A trained and qualified professional must
install the system, inspect it, and leak test it
before use. The warranty will be voided due to
any improper installation.
•
The trained and qualified professional should
have skills such as:
−
Gas line sizing
−
Connecting gas lines, water lines, valves,
and electricity
−
Knowledge of applicable national, state,
and local codes
−
Installing venting through a wall or roof
−
Training in installation of tankless water
heaters. Training on Rinnai Tankless Water
Heaters is accessible at
www.trainingevents.rinnai.us.
•
Read all instructions in this manual before
installing the system. The system must be
installed according to the exact instructions in
this manual.
Rinnai Commercial Hybrid System Installation and Operation Manual
•
Proper installation is the responsibility of the
installer.
•
When installation is complete, leave this manual
with the system or give the manual directly to the
consumer.
To The Consumer
•
You must read the entire manual to properly
operate the water heater and to have regular
maintenance performed.
•
Keep this manual for future reference.
•
As when using any appliance generating heat, there
are certain safety precautions you should follow.
See the Safety Precautions section for detailed
safety precautions.
•
Be sure your water heater is installed by a licensed
installer.
•
If installing in the state of Massachusetts, you must
read the Massachusetts State Gas Regulations
section in the Installation and Operation Manual for
Commercial CU199 Condensing Tankless Water
Heaters (supplied with tankless water heater).
For Your Records
Dealer Name:
Dealer Phone #:
Purchase Date:
Tank Serial #:
System Serial #:
System Serial
Number Label
Tank Serial
Number Label
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