Navien CH-180, Service Manual, Page: 26 / 155

© Navien Ameri c a I n c . 20 1 0 CH series servi c e Manua l
2 4
Version 1 .0
SV1OFF
HC minimum range? NO HC medium range? NO HC maximum range?
YES
SV2 OFF
YES YES
SV1 ON
SV2 OFF
SV1 ON
SV2 ON
SGV1 OFF?
SGV2 OFF?
NO
NO
Lock-out:
015E
Igniter OFF?
YES
YES
YES
HC <= minimum? YES Faucet Close
SGV2 OFF?
NO
Igniter OFF?
YES
YES
Igniter OFF? YES
NO
NO NO
NO
Burner Operation
A
DHW : 3-WAY Valve On
Pump On
E
Heat Demand? NO F
YES
CH : 3- WAY Valve Off
G
Heat Demand?
YES
CH : 3-WAY Valve Off CH : 3-WAY Valve Off
Post-Purge :
Fan & Pump ON for 3 min
F
NO