Hydrotech FreshPoint U440 Ultrafiltration System - Manual (Page 17)

Page 17
Installation Instructions
System Sanitizing - With Prefilter Installed
The unit should be sanitized/disinfected after the initial start up rinsing procedure, or in the case of biological
fouling. The system should be disinfected after flushing but prior to use. Disinfect after the integrity test, if
performed.
CAUTION: Sodium hypochlorite (bleach) is used for disinfection. The user should acquaint themselves
with the appropriate safety precautions for storage and handling of the chemicals being used. USE ONLY
SODIUM HYPOCHLORITE. DO NOT USE BLEACHES CONTAINING ANY OTHER COMPOUNDS.
Close the inlet valve of the bypass plumbing arrangement. If installing with backflush kit, disconnect the wiring
harness from the inlet solenoid valve.
If the FreshPoint™ system is equipped with a backflush or product tank, initiate successive flushes by
pressing the Extra Cycle button on the timer until the flush tank is empty. Isolate the backflush tank by
closing the tank isolation valve. CAUTION: Any product or backflush tank needs to be isolated during
disinfection. The chemicals use in disinfection are at a higher concentration than recommended for
these tanks, and are likely to cause damage to the tanks if exposed.
Open a faucet near the FreshPoint™ system to ensure that the plumbing system is depressurized.
Remove the prefilter sump.
Remove the filter cartridge.
Add unscented bleach to the filter sump as follows:
Filter Size Teaspoons of Unscented Bleach
10” x 2.5” 3/4
20” x 2.5” 1 1/2
10” x 4” 1 1/2
20” x 4” 3
Open the inlet valve, purge air from the cartridge filter sumps, and allow the water to flow until a chlorine smell
can be detected in the water flowing from the open service faucet.
Close the service faucet and allow the system to soak for one hour.
Initiate a system flush by pressing the Extra Cycle button on the timer.
Open the service faucet and allow the water to flow until the chlorine smell is not detected.
Use a test kit to confirm that the chlorine level is below 4 ppm (ideally below 1 ppm).
Close the inlet valve, depressurize the plumbing, and replace the filter cartridge.
Repressurize the system by opening the closest faucet, and slowly opening the inlet valve of the bypass
plumbing arrangement. Expel air from the feed side by pressing the Extra Cycle button several times.
Close the faucet. Open the tank isolation valve and reconnect the inlet solenoid valve to the wiring harness, if
applicable.
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