Chapter 4 – Smoke Control Section, Page 4-38__________________________________________________
Wash System – Troubleshooting (Cont.)
5.
Oscillating Wash
To check to see if the wash manifolds are oscillating proceed as follows:
a)
Open the Electrical and Cell/Plumbing Compartment access doors.
b)
Initiate a wash cycle and check to see if the motor drive is moving and that the clamp is holding the
manifold so the manifold is moving back and forth (Refer to Figure 4-39-1).
c)
If the motor is not moving check the following:
1.
The motor electrically moves the shaft to the top position and springs to the bottom position via
an internal spring. When the motor reaches the top position an end switch, located within the
motor, opens, releasing relay contacts that provides power to the motor, allowing the motor to
spring back to the bottom position. Referring to the wiring diagrams, electrically check the end
switch and relay for proper operation.
d)
If it is determined that the motor is defective, remove and replace as follows:
1)
Shut off the electrical power using the Disconnect Switch on the Main Electrical Panel (Refer to
Figure 4-23-1).
2)
Shut off the water to the unit.
3)
It may be necessary to remove the side panel on the Plumbing Compartment to accommodate a
pipe wrench.
4)
Disconnect the water supply pipe at the union (Refer to Figure 4-39-1).
5)
Remove the “C” retainer ring from the brass swivel elbow (Refer to Figure 4-38-1).
6)
Slide the body of the swivel elbow along with the connected water supply pipe straight out.
7)
Disconnect the electrical connections and conduit at the motor.
8)
Loosen the shaft clamp around the manifold (Refer to Figure 4-38-1)
9)
Remove the screws holding the motor in place and slide the motor off.
Figure 4-38-1
Brass Swivel Elbow
Assembled
Figure 4-38-2
Brass Swivel Elbow
Disassembled
Shaft Clamp
“C” Retainer Ring
“O” Rings
Receiver
