Navien NP-180 Service Manual page 33

HC minimum range?
YES
SV1 OFF
SV2 OFF
SGV1 OFF?
NO
SGV2 OFF?
NO
Igniter OFF?
NO
HC <= minimum?
NO
Burner Operation
©Navien America Inc. 2010
NO HC minimum range?
YES
SV1 ON
SV2 OFF
YES SGV2 OFF?
NO
YES Igniter OFF?
NO
YES
Faucet Close
YES
31
NR/NP series service Manual
NO HC minimum range?
SV1 ON
SV2 ON
Igniter OFF?
YES
YES
NO
Lock-out:
015E
YES
Version 2.0