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Installation Checklist
After installing the boiler, 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 boiler
Yes
No
Have you maintained the required clearances from building openings and intake air vents?
Have you minimized the distance between the boiler and the vent termination?
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 boiler 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 boiler’s rating plate?
Is the gas line at least 1/2 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 shut-off valve?
Have you tested the gas line pressure and all fittings for leaks?
Has the gas company inspected the installation, if required?
Connecting the Space Heating Piping
Yes
No
Has the system been filled (less than 80 psi) and purged of air?
Does the piping incorporate means for air removal (scoop, separator, etc.)?
Is there an expansion tank installed and set to the proper system pressure?
If glycol is used, is it propylene at a concentration of 50% or less?
If an external low water cut off (LWCO) is installed, is it wired to the boiler?
10. Installation Checklist
Summary of Contents for NFB-175H
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