Connect The Water Supply - Rinnai ThermaCirc360 RUR199i Installation And Operation Manual

3.6 Connect the Water Supply

Guidelines
•
The piping (including soldering materials) and components connected to this appliance must be approved for use in
potable water systems.
•
Purge the water line to remove all debris and air. Debris will damage the water heater.
•
The appliance must not be connected to a system that was previously used with a non-potable water heating
appliance.
•
Ensure that the water filter on the water heater is clean and installed.
•
DO NOT introduce toxic chemicals such as those used for boiler water treatment to the potable water used for
space heating.
Instructions
To connect the water supply, follow the instructions below.
IMPORTANT: Water connections to the water heater should follow all state and local plumbing codes.
If this is a standard installation, refer to the "Piping Diagram for Basic Installation" below.
1. Plumb the cold water supply line to the water heater on the 3/4 in. MNPT connection at the bottom of the water
heater marked "COLD."
2. Plumb the hot water supply line to the 3/4 in. MNPT connection marked "HOT."
3. If a pipe cover will be installed, make sure water lines to the water heater fit within the confinements of the pipe
cover.
The condensate drain pipe (along its entire
length) must be at least the same diameter
as the drain line (1/2 in. NPT).
Refer to section "3.9 Condensate" for more
information.
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PIPING DIAGRAM FOR BASIC INSTALLATION
Condensate
Drain Line
Hot Water Supply Line
Rinnai Tankless Water Heater Installation and Operation Manual
Floor Drain
Gas Supply Line
Cold Water Supply Line