Service and Maintenance
67
Cat. No. 01021713
8. Lubricate the O-ring on the end plugs with a silicone-based lubricant or use a mixture of 70% glycerin and 30%
water. Re-install the end plugs in to the vessels same as the original orientation. Reinstall the retaining clips.
9. Refer to the section on Initial Startup for information on flushing the shipping solution form the new elements.
NOTE Do not forget to record the new values for flow, pressure, temperature, and TDS.
End Cap
Retaining Rings
Screws
O-Rings
FLOW
Membrane
Brine Seal
Housing
Figure 35.
G Series membrane.
Pump Replacement
The pump should be replaced when it cannot develop the pressure required to maintain the appropriate pressure. The
most common cause of pump failure is inadequate pressure to the pump inlet. Therefore, correct any low inlet pressure
problem before replacing the pump to prevent damage to the new pump. Replace the pump when it cannot develop the
pressure required to maintain the desired product flow rate, up to the maximum pump pressure of 225 psig.
To replace the pump:
1. Turn the unit OFF, then shut off the inlet water supply.
2. Remove the tubing from the pump inlet and outlet.
3. While holding the bottom of the pump with one hand, loosen the screw on the coupling band securing the pump
to the motor. The pump will drop down. Remove the coupling band.
4. Examine the pump shaft. If it is broken or rounded, remove the old shaft and install a replacement shaft, P/N
01000331. Examine the slot in the motor. If the slot is damaged, replace the motor.
5. Remove the plumbing fittings from the old pump, apply fresh Teflon tape, and install the fittings in the new
pump. (Skip this step if replacing only the shaft.)
6. Place the coupling band over the shaft end of the new pump. Insert the pump shaft into the slot in the motor.
7. Observe the alignment of the pump against the motor, making certain the pump and motor flanges are in com-
plete contact and are not skewed.