Hydrotech FreshPoint U440 Ultrafiltration System - Manual (Page 18)

Page 18
Installation Instructions
System Sanitizing - No Prefilter Installed
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 or product tank.
If the FreshPoint™ system is equipped with a backflush 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.
Separate the drain plumbing from the FreshPoint™ housing at the union.
Drain the FreshPoint™ housing into a bucket by loosening the supply port union or using the recommended
integrity test port.
Tighten the supply port or close integrity test valve.
Through the drain port fill the FreshPoint™ housing with a solution containing chlorine at 100 mg/l (1 1/2
teaspoons of unscented bleach in 1 gallon of clean water). See figure 6.
Reconnect the drain plumbing union.
Open the inlet valve of the bypass valve arrangement and allow water to flow until a chlorine smell is detected
in the water flowing from the open faucet.
Close the open 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).
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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Add Sanitizing Solution
Figure 6: Adding Sanitizing Solution
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