Figure 2-71. Solid-State Timer (Subpanel and Rotary Switches)
Shut the ROWPU down in the normal way (para. 2-31).
Make sure R.O. ELEMENT CLEANING switch (fig. 2-42) on side of control panel is down.
Check water level in backwash tank. Tank should be full.
Ensure basket strainer in backwash pump is not clogged.
Open backwash tank valve.
Loosen draincock on bottom of backwash pump to prime pump.
Turn BACKWASH VALVE handle downward to BACKWASH.
(All models except 600-1 ) Press RESET button on backwash timer to ensure INTERNAL
INDICATOR knob is in service position (view 1, fig. 2-74). (Model 600-1) Ensure white cam in mechanical timer is
in SR position (fig. 2-72).
(9) Push BACKWASH switch up to START position and release immediately.