Gas Water Heater Installation
12
█
Installation Warnings:
Read all s
afety warnings in the “Owner’s Operation Manual”. The additional safety
issues outlined below must also be followed completely when installing this Navien
Water Heater:
1. This unit is designed for indoor installations. DO NOT operate this unit without the vent piping
connected. Exhaust gases must be completely expelled out of the building.
2. DO NOT use this appliance if any part has been underwater. Immediately call a qualified
service technician to inspect the appliance and replace any part of the control system and any
gas control which has been underwater.
3. Be sure not to reverse the water and gas connections as this may damage the gas valves.
4. Water temperature over 125°F can cause severe burns instantly or death from scalds. If the
proposed water heater outlet temperature is above 125°F, a thermostatically controlled mixing
valve (or a temperature limiting valve) for reducing point of use water temperature is
recommended to reduce the risk of scald injury. Contact a licensed plumber or the local
plumbing authority for further information.
5. The appliance should be located in an area where leakage within the unit or at its connections
will not result in damage to the surrounding area. Navien will not be responsible for any
damage resulting from leaking if adequate drainage is not provided.
6. DO NOT use this water heater for any purpose other than water heating and space heating.
7. If the water quality is known to have high acidity and/or high hardness, water treatment is
recommended to maintain full warranty. Consult the local water authority.
8. Protect against snow accumulation around the vent terminations. Ensure the exhaust vent
pipe and the intake airpipe remain clear from obstructions at all times.
9. DO NOT overtighten fittings as pipe and/or fitting damage may occur causing leakage.
10. DO NOT install water heater where subject to vibtations.
11. The vent for this appliance shall not terminate over public walkways, near soffit vents, crawl
space vents, or other areas where condensate or vapor could create a nuisance, hazard, or
cause property damage. The vent also should not terminate where condensate or vapor could
cause damage or could be detrimental to the operation of regulators, relief valves, or other
equipment.
12. For other than a direct vent appliance, the appliance must be located as close as possible to a
chimney or gas vent.
13. Should overheating occur or if the gas supply fails to shut off, turn off the manual gas control
valve to the appliance.
Follow all local codes and/or the most recent edition of the National Fuel Gas
Code (ANSI Z223.1/NFPA 54) in the USA or the Natural Gas and Propane
Installation Code in Canada (CAN/CGA B149.1).
