15
Normal Operation
Starting
- Start the still as follows:
1.
Close the drain valve.
2.
Open the deconcentrator valve slightly,
if not adjusted.
3.
Open the cooling water inlet valve.
4.
When water begins to issue steadily
from the deconcentrator valve, turn on
the still heat supply.
As long as the low water cutoff control “ON/OFF”
toggle switch is in the ON position, the still will
start and stop automatically, depending on the
stored distilled water distribution requirements
and the operating cycle of the interval drain timer.
To stop the still, set the low water cutoff control
“ON/OFF” toggle switch to the OFF position.
When this is done, the still will drain
automatically.
5.
If necessary, adjust the cooling water
throttling valve until a puff of steam
issues from the condenser vent.
Stopping
- Stop the still as follows:
1.
Shut off the still heat supply.
2.
Close the cooling water inlet valve.
3.
Open the drain valve and let the still
drain completely.
O
PERATION
Caution
Ensure that the water level in
the evaporator is above the
heating elements before turning
on the still. The heaters are the
immersion type and will burn out
if operated in air. The water level
should be safe when water
issues steadily from the decon-
centrator valve.
Note
Ideally, the temperature of the
steam and gases escaping the
vent should be 70°C or higher.
To measure the vent
temperature, use a
thermocouple probe, such as
the Thermolyne PM20700
Digital Pyrometer, inserted into
the vent.
Note
Do not change the setting of the
cooling water throttling valve
and deconcentrator valve.
