_________________________________________________Chapter 4 – Smoke Control Section, Page 4-37
Wash System – Troubleshooting (Cont.)
Removing and Replacing Nozzles Procedure
Clogged nozzles may be cleaned by soaking in vinegar but it is recommended that they be replaced with a
new one. Also, the gasket on the back side of the nozzle is not replaceable so if damaged the nozzle must
be replaced. To remove and replace nozzles proceed as follows:
1.
The nozzles are held in place by a 1/4” hex head screw, called a nozzle holding screw, on the back
side of the manifold (Refer to Figure 4-37-1). Remove the screw and gently pry out the nozzle with
a utility knife or a flat blade screwdriver. The nozzle has a small amount of silicone sealing it to the
manifold.
2.
Apply a very small amount of silicone to the shoulder and gasket area of the nozzle and slide into
the hole (Refer to Figure 4-37-2).
3.
Insert the hex screw and gently tighten to 7 inch lbs. max. Caution: over tightening may strip out
the hole in the nozzle. The nozzle has two offset receiving holes so if one strips, remove the
nozzle, flip over and re-install.
1/4" Hex Head Nozzle
Holding Screw.
Tighten to 7 inch lbs.
max.
Figure 4-37-1
Nozzle Holding Screw
Nozzle
Hex Screw
Receiving
Holes
Figure 4-37-3
Manifold/Nozzle
Exploded View
Shoulder
Figure 4-37-2
Spray Nozzle
Back Side
Gasket
