１８
3. Description and Function of Each Part
Principle of Operation
Description of the operation mechanism of WG270.
(1) Drain of the boiler
Set the earth-
leakage breaker to “ON”, and the standby screen appears in about four seconds. In
this state, press the POWER key, the boiler drain solenoid valve
⑬
and cooling water solenoid valve
③
open simultaneously for about 40 seconds. Boiler drain is made every five hours of distillation
operation.
(2) Boiler Water Supply and Distilling Operation
When drain of boiler is finished, both the raw water supply solenoid valve
④
and boiler water supply
solenoid valve
⑳
open simultaneously, supplying water to the boiler
⑮
. When the float switch (1)
⑪
in the float cylinder
⑩
detects the water level, the heater
⑯
is energized to start distillation. Water
supply to the boiler is controlled by opening/closing the raw water supply solenoid valve
④
and
boiler water supply solenoid valve
⑳
with the fload switch
（
2
）⑫
. The supply-water circulation pump
⑥
keeps circulation of the ion-exchanged water normally during distillation, ensuring stable water
supply to the boiler
⑮
.