Navien KDB-353 STC - Room Controller Operation; Controller Modes and Functions

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1. Continuous : Press this button to heat the room quickly.
ōPress the continuous button(Ξ), lamp(Ι) will on.
2. Outgoing : Boiler will stop and the frozen-up preventer will operate.
ōPress the outgoing button(Ν), outgoing lamp(Κ) will on.
3. Hot water : You can use hot water without heating room.
ōPress the hot water button(Μ), hot water lamp(Λ) and run lamp(Η) will on.
(Run lamp will not on at the wall-hung type gas boiler)
4. Temperature control : You can set the room temperature with temperature controller(΢).
(10°C~40°C)
ōPress the temperature button(Τ), lamp(Σ) will on. When the setting temperature you chose is
higher than the present room temperature, the boiler will run.
5. Time control : You can run the boiler according to the interval you set with the timer.
ĶIf you set the time interval. Ĵ

“0” : The boiler will run continuously.
“1” : The boiler will run 15min., then stop for 60min.(60min. interval)
“2” : The boiler will run 15min., then stop for 120min.(120min. interval)
“3” : The boiler will run 15min., then stop for 180min.(180min. interval)
“4” : The boiler will run 15min., then stop for 240min.(240min. interval)
ōPress the timer button(Π), the lamp(Ο) will on. The boiler will run for 15min, with the interval you
chose(60min. ~ 240min.), again and again.
6. Run lamp : Lamp is on then the boiler will run.
7. Check lamp : Indicate the trouble of boiler.(Misre, Low water level, Overheat, ... )
Room Controller
Model : KDB-203/253/353 STC
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