TM 11-6780-225-12
Control
Function
Contra
Function
Position
Operation
Position
Operation
overflow from
Supply valve S1 ..............
Open
Allows water
water tank.
flow from wa-
Closed ........Prevents
air
ter input to
from
water-pump.
entering water
Closed
Diverts water to
tank and water
valve S-2.
system.
Supply valve S2 ..............
Open
Allows water
Supply valve S9 ................. Open...........Allows water
flow from
flow from
pressurized
pressurized
water input
water input to
into water
water tank.
system.
Closed ........Prevents water
Closed
Diverts water to
flow.
valve SI.
Water heater on off switch .... On...............Allows power to
Supply valve S3 ..............
Open
Allows water
heating ele-
flow to or from
ment.
water pump to
Off .............Shuts off power
water tank.
to heating ele-
Closed
Allows water
ment.
flow to or from
Water heater pilot lamp
On...............Indicates heating
water pump
element oper-
into water
ating.
system.
Off ..............Indicates heating
Supply valve S4, (hot).....
Open
Allows hot water
element not
flow from the
operating.
water heater
Water pump on-off switch On...............Allows power to
to
water pump
the processing
for operation.
unit.
Off ..............Shuts off power
Closed
Diverts hot water
to
water
to valve S6.
pump.
Supply valve S5 (cold) ....
Open
Allows cold
water flow to
the processing
unit.
Closed
Prevents cold
water flow to
Control
Function
the processing
Position
Operation
unit.
High Off Low ..................... High
Applies power to
Supply valve S6 (hot)......
Open
Allows hot water
unit and high
flow to pro-
current to
cessing sink.
cathode.
Closed
Prevents hot
Off
Removes all
water flow to
power from
processing
unit.
sink.
Low
Applies power to
Supply valve S7 (cold) ....
Open
Allows cold
unit and low
water flow to
current to
processing
cathode.
sink.
m. Equipment Covered by Manuals Stored in
Closed
Prevents cold
Darkroom File Cabinet.
Refer to the equipment
water flow to
manuals stored in the darkroom file cabinet for
processing
instructions for components of the darkroom not
sink.
Supply valve S8 ..............
Open
Allows air
covered by technical manuals.
venting (or
pressurizing)
2-8. Preliminary Procedures
and water
Change 6 2-14
