Figure 2-14. Valves used for water source from darkroom water tank
Immersion heater is HOT. Handle
with care. Allow immersion heater to
(c) Fill the small section of the
cool on a surface that will riot burn.
d. Level Indicator (fig. 1-17). Use the following
procedure to measure the level of water in the water
12) into circuit 4 and immerse into snow.
(e) When there is sufficient water, set
(1) Open the high pressure petcock.
(2) When water runs freely, close the high-
Approximately 5 minutes will elapse
from the time snow becomes water
If water tank is full (indicated by
until the time water flows from valve
water flowing from valve S8), and
reading on level gage indicates water
(f) Set the water heater switch (fig. 1-
tank is half empty, bleed water from
17) to the ON position.
e. Outlet and Inlet Pressure Indicators (fig. 1-17).
water tank is now full and ready for operation.
A difference of pressure between the outlet and inlet
pressure indicators denotes that the filter requires
from circuit 4. Repeat procedures in step (3) above.