__________________________________________________Chapter 4 – Smoke Control Section, Page 4-35
Wash System – Troubleshooting (Cont.)
4.
Clogged Spray Nozzle
To check for a clogged spray nozzle proceed as follows:
Extreme Caution: Before removing the lead wires from Cells, a Standard Safety Voltage Test must
be conducted as described on page 4-11.
This test is necessary to insure that the Grounding Disc
made proper contact with the brass grounding screws to drain all the residual power from the
transformer.
a)
Open the Electrical and Cell/Plumbing access doors and remove all the Cells.
b)
Activate the wash cycle and observe to ensure all nozzles are spraying properly. If not, identify and
make note of the clogged nozzles.
If nozzles are clogged they must be cleaned or replaced. The procedure for removing nozzles that spray the
Outer Cells is different than removing nozzles for the Inner Cells as they can be easily reached by removing
the Outer Cells. To replace Inner Cell nozzles the wash manifolds must be removed.
To remove Outer Cell nozzles proceed as follows:
1.
Open the Electrical Compartment door first (the smaller door) and then the Cell/Plumbing
Compartment door. Opening the Electrical Compartment door releases the Plunger Safety Switch,
shutting off power to the transformer by releasing the micro switch, and draining residual power
from the transformer(s) by the Grounding Disc making contact with the brass grounding screws
(Refer to Figure 4-17-1 and 4-24-1).
Extreme Caution: Before removing the lead wires from Cells, a Standard Safety Voltage Test must
be conducted as described on page 4-11.
This test is necessary to insure that the Grounding Disc
made proper contact with the brass grounding screws to drain all the residual power from the
transformer.
2.
Once the Standard Safety Voltage Test is conducted, remove the lead wires and remove all the
Outer Cells.
3.
Remove and replace nozzles as follow the procedure “Removing and Replacing Nozzle Procedure”
on page 4-37.
To remove Inner Cell nozzles the wash manifolds must be removed. The top manifold, the manifold that
goes through the Oscillating Motor is called the Motor Manifold and the remaining are called Standard
Manifolds (Refer to Figure 4-36-1 and 4-36-2). To remove both types proceed as follows:
Removing the Motor Manifold.
1.
Remove the linkage arm that connects all the manifolds together (Refer to Figure 4-36-1).
2.
Place a pipe wrench on the manifold extension pipe and another on the square manifold and
unscrew the manifold (Refer to Figure 4-36-1).
3.
Push the manifold away from the extension pipe and then off to one side and slide out through the
Cell/Plumbing Compartment access door.
