Page 110 - FreeStyler® Maintenance Manual

®
MAINTENANCE

Chapter 3 General Repairs

Spot Free (RO)

Solenoid Valve
1) The inlet solenoid valve is normally closed. If the power switch is flipped off, or if the unit is
unplugged, the water stops flowing. This stoppage makes it possible to change the pre-filter or
work on the system without physically turning the water off.
2) The flush solenoid valve(s) is also normally closed.
a. This valve is utilized as part of the membrane cleaning system. The system will automatically run the flush cycle for
two minutes, 12 times per day, on systems with multiple flush solenoids, it is two minutes sequentially. When the
controller switches the flush cycle on, it activates the flush solenoid and opens it. Then a large flow of low pressure
water passes through the membrane to rinse it. This constant flushing is vital to prevent scaling of the membrane.
b. To verify that the valve coil is on or energized, hold a screwdriver above the coil of the solenoid valve as shown.
See the picture(s) below. The coil will pull slightly on the screwdriver if it is energized. A distinct click should be
heard each time that the solenoid is energized.
c. The timer in the controller activates the flush solenoid. If the solenoid stays on for longer than two minutes it is
locked in flush. If this lock situation should happen call your factory representative for help.

Needle and Gate Valve
The needle and gate valves, located on the solenoid valve assembly, play an important role in the efficiency of the
reverse osmosis operation. The two valves should be adjusted in tandem. Opening of one valve should be followed
by a closure of the other until the optimum pump pressure and reject water levels are reached. Only perform these
adjustments when the RO system is in the ON position. If the unit is in flush cycle mode the pressure reading will be
wrong.
1) Needle Valve – This valve is labeled “Reject” and is used to adjust the amount of rejected water
that goes to the drain.
Note: Adjusting the needle valve results in a difference in pump pressure.
Note: Take care to keep the pump pressure within the specifications for the applicable model. See
the chart below.
Note: Over pressurization can result in damage to the membrane and the high-pressure pump.
2) Gate Valve – This valve is labeled “RECIRCULATE” and is used to adjust the amount of (REJECT)
wastewater that is returned to the inlet of the system.
Note: In a good water area (water not very high in dissolved minerals) the gate valve might be
adjusted so that 50% of the water is returned to the inlet stream.

Note: In poor water areas (water very high in dissolved minerals), this valve might be adjusted so
only 10%-20% of the rejected water is being recycled. Under poor water conditions,
recirculating a higher percentage of rejected water results in scaling or fouling of the RO
membrane.
Note: The less water re-circulated, the more water is rejected to drain. To adjust the valve, slowly
open or close it until the pump pressure meets the specifications set in chart below.

Checking Solenoid Float Assembly Water Quality Light

3-46 Belanger, Inc.® * PO BOX 5470 * Northville, MI 48167-5470 * Ph (248) 349-7010 * Fax (248) 380-9681 1MANUL222