Navien NR-180(A) Operation & Installation Manual page 64

DIP Switch Settings
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For the set of 6 DIP switches:
Are switch #1 and #2 in the down (off) position?
Is switch #3 properly set for the gas supply type?
Is switch #4 in the down (off) position?
Are switch #5 and #6 set for the proper model number?
For the set of 8 DIP switches:
Unless using multiple units, is switch #1 in the down (off) position?
Are switch #2 and #3 in the down position?
If using NR, NP series, switch #4 and #5 must be in the up (on) position; If using
NR-"A", NP-"A" series, set the switches proper for normal mode(#4:off, #5:off) or
external recirculation mode(#4:off, #5:on) or internal recirculation mode(#4:on,
#5:off).
Is switch #6 properly set for regular or premium type?
Are switches #7 and #8 set to the customer's desired temperature?
Recommended temperature should not exceed 120°F.
Has the homeowner been advised of the scalding potential of water temperatures
set above 125°F?
Dip switch is property set for CASCADE master unit and last unit DOWN or ON
position.
Has the owner been advised of the minimum flow rate to trigger the burner
(if not using the NR-"A" or NP-"A" series)?
Has the owner been shown how to clean the inlet water filter?
Has the owner been left with the operation and installation manual for future
reference?
Has the owner been shown how to shut off the gas in case of an emergency?