Installation Sheet

38 Rinnai Tankless Water Heater Installaon and Operaon Manual
When installing Common Vent, follow these guidelines:
• Use only the materials listed in this manual for vent,
air intake pipe, and ngs. Failure to comply with this
warning could result in property damage, personal
injury, or death.
• When cung vent components, ensure that the cuts
are straight.
• Chamfer and deburr all edges before installing the
components.
• Vent joints must not leak. Conrm gas ght
connecons of every vent joint.
• Before operang the water heater(s), ensure vent
system is clean and free of debris.
• Vent system must be supported according to the vent
manufacture’s installaon instrucons.
• Venng should be as direct as possible with a
minimum number of ngs.
• The common vent system must only be installed by a
trained and qualied professional.
COMMON VENT TERMINATION CLEARANCES
• Vent terminaon per ANSI Z223.1/NFPA 54. For
clearances not specied in ANSI Z223.1/NFPA 54,
clearances are in accordance with local installaon
codes and the requirements of the gas supplier.
• Refer to secon “3.5 Vent the Water Heater” for
addional clearance requirements specic to the
installaon applicaon.
Common venng allows mulple Rinnai Tankless Water Heaters to share the same vent system.
Rinnai water heaters can only be common vented with Schedule 40 PVC/CPVC or with the Rinnai C-Vent Common
Vent System.
Example: Rinnai Common Venng (C-Vent) Example: Schedule 40 PVC/CPVC
Common Vent
DO NOT
DO NOT obstruct combuson air ow or exhaust
gas ow in the venng system.
DO NOT install the water heater in an area with
negave air pressure.
DO NOT combine the common vent system with
exisng vents, chimneys, or vent pipes connected
to other water heaters, boilers or appliances.
DO NOT common vent dierent Rinnai models in a
single common vent system.
DO NOT use cellular core PVC/CPVC, Radel, ABS or
galvanized materials.
DO NOT combine vent components from dierent
manufacturers.
WARNING
DO NOT slope the combustion air pipe toward unit.
Failure to comply with this warning could result in
property damage, personal injury, or death.
DO NOT apply PVC/CPVC glues, solvents, or
cleaners to the tankless water heater’s intake or
exhaust gasket connections. Failure to correctly
assemble the components according to these
instructions may result in property damage,
personal injury, or death.
Common Vent (Indoor Units Only. Direct Vent and Non-Direct/Room Air Vent)
3
General Guidelines