Watts R12-1200-1 - Manual (Page 10)

D. STARTUP
1. Verify that the pretreatment equipment is installed and working properly. Verify that no
free chlorine is present in the feed water.
2. Verify that the off / auto switch is in the off position.
3. Install a 10" five micron filter cartridge in the prefilter housing.
4. Open the reject control valve completely (Figure # 1 item B) by turning it
counterclockwise.
5. Close the reject recycle control valve (Figure # 1 item C) completely by turning it
clockwise.
6. Open the feed water shutoff valve installed in step III-B-1 above.
7. Move the controller on/off switch to the auto position.
8. Allow the unit to run for 15 – 30 minutes to flush the preservative from the membrane(s).
9. Adjust the reject control valves (Figure # 1 items B & C) until the desired flows are
achieved. Closing the reject valve increases the product flow and decreases the reject
flow. Opening the reject recycle valve decreases both the reject and product flow. See
the flow rate guidelines and temperature correction table in the appendix to determine the
flow rates for different operating temperatures.
10. Allow the product water to flow to drain for 30 minutes.
11. Turn off the system and connect the product line to the point of use. The product water
line should never be restricted. Membrane and/or system damage may occur if the
product line is blocked.
12. Restart the system and record the initial operating data using the log sheet.
E. CONTROL FUNCTION
1. When the off / auto switch is in the auto position, the inlet valve opens and the pump runs
based on the product pressure. The switch is factory set to cut off at 40 psi and cut on at
20 psi. Instructions for adjusting the cut off and cut on pressures are located on the inside
cover of the switch.
2. If the water pressure feeding the pump drops below 10 psi for more than 5 seconds, the
pump will turn off and the red light on the control box will turn on. The controller will
automatically reset after 30 minutes and the pump will turn back on. Cycle the off / auto
switch to manually reset a low pressure shutdown.
3. Autoflush – This is an optional feature that provides increased reject flow at startup and
for 2 minutes every hour. The timer is preprogrammed at the factory and should not be
adjusted.