KDB-GOM
Series
- 30 -
4.18 Main Controller
Voltage , Frequency
AC 220V , 50 / 60 Hz
Voltage Range
+10% to –15%
Ambient Temp.
-15
℃
to 70
℃
Electric Spec.
Ambient Humidity
45 – 90 %
Structure
Casing
ABS
Model
KDC – 208-1M
4.18.1 DIP switch setting on main controller
4.18.2 Functions of Main Controllers
4.18.2.1 Pre-Purge
When the boiler operates, the function is to operate blower (fan) first and exhaust the remained air in the combustion
chamber before combustion starts, in order to prevent from immoderate ignition. Pre-Purge time is by achieving the fan’s
light-up RPM
±
200 rpm with more time than 4
±
1 seconds.
4.18.2.2 Pre-Ignition
After Pre-Purge, the function is to operate ignition transformer previously in order to light up easily before supplying the
fuel (gas) for combustion. Pre-Ignition time is from ON time of ignition transformer till ON time of fuel supply device (gas
valve 2).
DIP Switch adjust part
Max. adjust screw
for secondary gas
pressure
NO
ON
OFF
1
Trial Run
Normal
2
Forced Max.
Combustion
Normal
3
Forced Min.
Combustion
Normal
4
FE
FF
5
L.P. Gas
Natural Gas
6
Close-Air Type
Open Tank System
7
50 Hz
60 Hz
NO
161GOM
201GOM
251GOM
301GOM
8
OFF
OFF
ON
OFF
9
ON
ON
OFF
OFF
10
ON
OFF
ON
ON
