2-10. BACKWASH OF MULTIMEDIA FILTER - cont.
(2) Models H-9518-1, H-9518-2 and H-9518-3 (refer to figure 2-65a):
The solid state timer controls the duration and sequence of the backwash cycle. There are three LED
indicator lights on the outside of the timer box and on the inside of the box, there is a CIRCUIT
BREAKER. The solid state timer operates automatically and does not contain any operator controls.
The three indicator lights illuminate in response to the following backwash functions below.
1- (Green)In Service (Backwash cycle not in operation)
2- (Red) Backwash
3- (Red) Rinse
Figure 2-65a. Solid State Timer.
(Models H-9518-1, H-9518-2, and H-9518-3 only)
Change 2 2-105