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Figure  2-68.  Mechanical   Timer   Reconditioning   Knob
Figure  2-71.  Solid-State   Timer   (Subpanel   and   Rotary   Switches)

TM-10-4610-215-10 Water Purification Unit Reverse Osmosis 600 GPH Trailer Mounted Flatbed Cargo 5 Ton 4 Wheel Tandem Rowpu Model 600-1 Manual
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TM   10-4610-215-10 TM    08580A-10/1 Figure   2-70.   Solid-State   Timer   (Pilot   Control   Valve) (2) Solid-State Timer (Model No. 600-3). The solid state timer is approximately 8 inches high, 10 inches wide and 6 inches deep. Protruding from the rear of the timer is the pilot controller and solenoid valve (fig. 2-73). Inside is a black RESET button and an INTERNAL INDICATOR knob mounted to a subpanel (view 1, fig.  2-74). (a) Ensure INTERNAL INDICATOR knob is in the SERVICE position by pressing the black RESET button. The INTERNAL INDICATOR knob allows the position of the pilot controller valve to be changed manually, which is never necessary if timer is functioning properly. In any event, if pilot controller valve is not in SERVICE position, ROWPU cannot be backwashes using normal procedures. In fact, ROWPU will not even operate. (b) Overcurrent protection is provided by an internal resettable semiconductor. In the event of an overload, the circuit breaker is reset by depressing the RESET button. If power loss erases the memory of the time control counter, an automatic homing circuit is incorporated into the system which returns the pilot controller to the service position whenever power is restored. (c) Remove the subpanel to access the four 10-position rotary switches (view 2, fig. 2-74) used to set the duration (in minutes) of each phase of the backwash cycle. Ensure settings are as follows: Switch Function Recommended Setting SW  1- Primary   Backwash 2 SW  2- Fast  Rinse 6 SW 3- Secondary   Backwash 2 SW 4- Conditioned Rinse 2 2-73







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