9
Startup and Shutdown
Prior to start-up, read and fully understand the
MAXIM
Owner’s Manual section.
Initial Start-up / Seasonal Re-start
Always inspect the filter system prior to start-up or after an extended shutdown period.
1. Before pressurizing the system, check that all clamps, bolts, lids, and system accessories are properly fastened.
2. Load the sand media - see procedure on page 8. (Disregard for seasonal re-start)
3.
MAXIM
Controller Settings: With the pump starter HOA switch in the “OFF” position, turn the MAXIM controller
switch to the ON position. Check the controller’s settings by scrolling through the menu screens. See the
controller recommendations in the
Adjustable Values
section. After verifying settings, scroll thru the menu to the
Status screen. When the controller is powered ON, the valves are allowed to rotate to the Filtration position. After
60 seconds, the Status will be AUTO.
4. Open all isolation valves and allow the system to fill with water. Make sure the backflush drain is not restricted.
5. Open the air vent located on top of the sand filter housing.
6. Prime the pump by filling the suction line and pump volute with water. If the main pump does not have a flooded
suction, then a foot or check valve is required to maintain a prime after shutoff. For a flooded suction, prime the
pump if needed.
7. Close the Outlet Throttle Valve by turning the handle fully clockwise,
then open the valve 2 turns
.
8. Refer to the System Labels on the Maxim Controller box. There is a duplicate label on the inside cover.
Maximum operating pressure (50 PSI) and Maximum flow are listed on this label. These must be adhered to
during start up.
9. Using the pump starter HOA switch, momentarily bump start the motor by switching to “HAND” position, only
long enough to verify that the motor is wired to rotate in the direction shown by the arrow.
10. After confirming that the motor is rotating in the right direction.
11. Turn on the system by switching the pump starter HOA switch to “AUTO” mode. AUTO mode will allow the
controller to turn the pump ON/OFF as required. Note that the controller power switch must be ON in order for
the pump to start.
12. While observing the pressure gauge on the top of the filter, rotate the Outlet Throttle Valve until the gauge is
reading approximately 25 PSI.
13. Due to variances at site locations such as installation pipe sizes, pipe lengths, elevation, etc., the Outlet Throttle
Valve may require further adjustment to optimize the desired flow.
Never exceed the specified maximum pres-
sure or specified maximum flow
.
14. Check the setting of the Pressure Differential Gauge. Factory and initial setting should be 12 PSID. See the
Differential Pressure Gauge information in the Maxim Owner’s Manual section.
15. Close the air vent once there is a steady stream of water.
16. Check all system components to ensure there are no leaks.
17. If the system has new sand media installed, run a complete backwash cycle. This will purge any excess fine
particles from the system. To start a cycle, press OK on the controller’s Status Screen. See the “
Monitoring the
System Status and Initiating a Backflush
” section in the Maxim Owner’s Manual section of this manual for
information on normal Backflush sequence.
18. Once the backflush is complete, the system will automatically resume normal filtration.
