Rinnai RU98e Installation And Operation Manual page 18

Tankless Water Heaters must be vented and furnished with intake air and exhaust vent using piping and
methods described in this section. Each water heater must have its own intake and vent. DO NOT common vent
with any other appliance using this method. Inspect finished vent and intake air piping thoroughly to ensure all
are airtight and comply with the instructions provided and with all requirements of applicable codes. Failure to
provide a properly installed vent and air system will cause severe personal injury or death.
Combustion Air Intake - The combustion air intake termination fitting must be installed with the clearances and
geometry relative to the exhaust (vent) depicted in this section to ensure that flue products do not enter the
combustion air intake. Ensure that the intake air will not contain any of the contaminants as outlined in the
"Determine Installation Location" section. Contaminated intake air will damage the water heater, resulting in
possible severe personal injury, death, or substantial property damage.
Exhaust - The exhaust (vent) termination fitting must be installed with the clearances and geometry relative to
the combustion air pipe as depicted in this section to ensure that flue products do not enter the combustion air
intake
If the vent and/or combustion air intake piping configurations covered in this manual cannot be applied to a
specific installation, contact Rinnai's Application Engineer group for assistance. Other configurations may be
available.
Installations must comply with local requirements and with the National Fuel Gas Code, ANSI Z223.1/NFPA 54
for U.S. installations or CSA B149.1 for Canadian installations. DO NOT use cellular core PVC, CPVC, or Radel
based pipe materials for the exhaust vent. Vents MUST be of solid core pipes ONLY.
Use only the materials listed in this manual for vent, combustion air intake pipe and fittings (See "Vent and Air
Piping" table) . Failure to comply with this warning could result in severe personal injury, death or substantial
property damage.
If used, a masonry chimney can ONLY be used as a PIPE CHASE for the exhaust and combustion air intake pipes.
The exhaust and air piping must be installed as instructed in this manual. The chimney must be used only for
Rinnai Water Heater(s) vent chase. NO OTHER appliance or fireplace can be connected to the chimney. Exhaust
and air piping materials must comply with this instruction. The chimney must be fitted with a sealed access
opening to facilitate interior inspection. The chimney chase (and liner, if installed) to be inspected annually for
any degradation. Failure to comply could result in severe personal injury, death, or substantial property damage.
18
DANGER
WARNING
NOTICE
WARNING
WARNING
WARNING
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