135Appendixes
8.7 Installation Checklist
After installing the water heater, review the following checklist. You should be able to answer “Yes” to all of the
items in the checklist. If not, review the appropriate sections to complete the installation. To troubleshoot any
operational problems refer to “Troubleshooting” in the Owner’s Manual.
If you have additional questions or need assistance with installation, contact Technical Support at 1-800-519-
8794 or 1-949-420-0420, or refer to the technical support section of Navien’s website (www.navieninc.com).
Installing the Water Heater Yes No
Have you maintained the required clearances from building openings and intake air vents?
Have you minimized the distance between the water heater and the vent termination?
Have you minimized the distance between the water heater and major fixtures?
Have you maintained the proper service and maintenance clearances?
Is the make-up air supply sufficient for proper operation?
Is the make-up air supply free from dust, dirt, corrosive elements, and flammable vapors?
Is the water heater and vent piping clear of combustible materials, including clothing,
cleaning materials, and rags?
Connecting the Gas Supply Yes No
Does the gas supply match the type specified on the water heater’s rating plate?
Is the gas line at least
1
/
2
in. or
3
/
4
in. ID (Inner Diameter)?
Is the gas supply line sufficient in length and diameter to deliver the required BTUs?
Have you measured the pressure of the gas supply line?
Is the gas supply pressure within the recommended ranges specified in this manual?
Is the gas supply line equipped with a manual full port valve?
Have you tested the gas line pressure and all fittings for leaks?
Has the gas company inspected the installation, if required?
Connecting the Water Supply Yes No
Is the water supply pressure sufficient (greater than 40 PSI)?
Have you installed shut off valves on the inlet and outlet to facilitate cleaning of the inlet
water filter?
Have you bled the air out at each fixture?
Have you checked each fixture to ensure hot water is being supplied?
Have you cleaned the inlet water filter after operating the water heater for 10 minutes?
If you installed a recirculation line, have you insulated the hot water pipes and the return
line?
Is the 2-way valve in the EXT position if a recirculation line is installed?
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