Installation Guide

Rinnai Tankless Water Heater Installation and Operation Manual 23
4. Securely screw the top and bottom brackets into the wall, making sure the screws are flush with
the wall.
• Use any of the holes in the top and bottom brackets.
• Make sure the securing method is sufficient to support the weight of the water heater. Refer
to the water heater weight in section “3.4 Specifications.”
IMPORTANT
The water heater must be installed in an upright position. Do not install the water
heater upside down or on its side or back.
Top
Bracket
Bottom
Bracket
Figure 11: Top and Bottom Bracket
5. Pour approximately 10 ounces (1.25 cups) of water directly into the water heater’s exhaust port.
Before operation of the water heater, the condensate collector must be filled with water. This is to
prevent the potential of exhaust gases from entering the building. Failure to fill the condensate
collector could result in severe personal injury or death.
WARNING