Rinnai RU98i Installation Manual page 19

Installation Instructions
Refer to the Ubbink appendix of this manual for the vent system assembly instructions.
Follow these Rinnai installation instructions in this manual in addition to the Ubbink vent system assembly
instructions.
Install the venting according to one of the 2 configurations below. Do not locate the common vent remotely
from the water heaters.
The installation area should be measured to make sure that adequate space is available to install the water
heaters and venting system.
Back to back Configuration (2 to 8 water heaters)
3°
20.5" (520)
In Line Configuration (2 to 8 water heaters)
3°
20.5" (520)
TYPICAL
Note: If water heaters are mounted directly on a wall, air intake piping will need to be in front of the appliance
adapters. The intake header in the drawing above has been removed for illustration purposes.
TYPICAL
19
AIR
INTAKE
7"
(178mm)
6.25"
(159mm)
NOTE: Dimensions above
are used in all back to back
configurations
AIR
INTAKE
Rinnai CVent