Vent Dampers:
Vent dampers must be certified in accordance with ANSI Z21.68.
Before installing any flue damper, consult the local gas authority and damper manufacturer for proper
installation.
Thermal Operated Vent Dampers: Should NOT be used with this appliance. This appliance has a
thermal efficiency greater than 80%. This higher efficiency will result in lower flue gas temperatures.
Such temperatures may be too low to activate a thermal operated vent damper. Use of a thermal
operated flue damper on this product may result in spillage of exhaust gases and ultimately carbon
monoxide poisoning.
Vent Inspection:
The entire vent system (Combustion air ducts, louvers, and exhaust vent) must be checked
periodically for signs of obstruction or damage. If damaged components are observed they must be
repaired or replaced immediately.
Vent Size:
This water heater is equipped with a 4” vent adaptor and must never be attached to a vent smaller
than 4”. Certain applications may require vent diameters greater than 4”. Consult your local gas
supplier or authority to aid in the proper vent diameter selection per the requirement of the vent tables
in the current edition of the National Fuel Gas Code ANSI Z223.1/NFPA 54.
Vent Guidelines: Exhaust
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Summary of Contents for RH180
Page 1: ...Rinnai RH180 Hybrid Tank Tankless Water Heater Installation Fundamentals Level II 1...
Page 3: ...3 RH180 Hybrid Tank Tankless Water Heater Level II Training Program Installation Fundamentals...
Page 6: ...RH180 Sequence of Operation 6...
Page 8: ...RH180 Water Heater Sizing 8...
Page 10: ...RH180 Product Features Safety devices 10...
Page 18: ...Dimensions 18...
Page 38: ...RH180 Temperature Controller 38...
Page 39: ...Temperature Controller 39...
Page 41: ...RH180 Maintenance and Warranty 41...
Page 49: ...Component Description 49...
Page 50: ...Component Description 50...
Page 61: ...RH180 FAQ 61...