Hydrotech FreshPoint U440 Ultrafiltration System - Manual (Page 6)

Page 6
Flushing Schedule & Installation Instructions
Flushing Schedule
The FreshPoint™ is flushed on a schedule dependent on the quality of water being treated.
Default Factory Settings
Flush Frequency:
100 gallons
Flush Duration: 0.5 minutes
Day Override: 1 Day
These settings may need to be adjusted based on the analysis for the water treated and practical experience
with fouling. The FreshPoint™ will automatically initiate a flush if 24 hours (for each 1 day of the Day Override
setting) has elapsed since the last flow initiated flush. This setting is adjusted in the day override setting in master
programming.
A post-ultrafilter pressure tank is recommended to ensure sufficient flow and pressure to the home during a flush
cycle. The backflush surge tank (where installed) will perform the same function.
Refer to Table 1 below for initial set up.
Table 1: Initial Recommended Flushing Parameters by Water Source and Treatment
Water Source Typical Water Quality to Filter
(with recommended pretreatment)
Recommended
Pretreatment 1
Backflush Kit Flush Frequency
(Gallons
Throughput)
Flush
Duration
(Seconds)
Surface Water
(Municipally Treated)
• Chlorine < 4.0 mg/l
• Turbidity < 1.0 NTU
• TOC < 2.0 mg/L
• SDI15 < 6.67
• Metals (Fe, Mn, Cu, etc.) < 1 mg/l
• 200 micron prefilter Recommended 100 30
Surface Water (Private
Multi Barrier Treatment)
• Chlorine > 2mg/l, < 4.0 mg/l
• Turbidity < 5.0 NTU
• TOC < 10.0 mg/L
• SDI5 < 20
• Metals (Fe, Mn, Cu, etc.) < 1 mg/l
• In-Line coagulation and
filtration with multimedia
filter
• Disinfection with chlorine
• 200 micron prefilter
Recommended 50 60
Well (Municipally
Treated) 2
• Chlorine < 4.0 mg/l
• Turbidity < 1.0 NTU
• TOC < 2.0 mg/L
• SDI15 < 6.67
• Metals (Fe, Mn, Cu, etc.) < 1 mg/l
• Iron removal filtration
(if iron over 1 mg/l)
• 200 micron prefilter
Recommended with
high turbidity,
suspended solids,
colloids, or ferric iron
200 30
Well (Private) 2 • Chlorine < 4.0 mg/l
• Turbidity < 1.0 NTU
• TOC < 2.0 mg/L
• SDI15 < 6.67
• Metals (Fe, Mn, Cu, etc.) < 1 mg/l
• Iron removal filtration
(if iron over 1 mg/l)
• Disinfection – optional
• 200 micron prefilter
Recommended with
high turbidity,
suspended solids,
colloids, or ferric iron
100 30
1 In all cases, a disposable pre-filter cartridge is recommended to protect the FreshPoint™ from large particles,
plumbing debris, etc.
2 Some shallow wells may have serious contamination problems, hazy water, high TOC, color and high bacterial
loads. The backflush kit is recommended to avoid fouling in these installations.
NOTE: It is important to understand the water quality and fouling potential to determine the type of
flushing required when installing the FreshPoint™.
Flow Capacity
Assess the household water use, especially peak water draw. The standard single-element FreshPoint™ is
sized for 10 gpm peak capacity flow. Water draw in the house that exceeds peak capacity will have the effect
of reduced pressure and volume delivery at the open taps.
Maximum recommended continuous flow for the FreshPoint™ system is 1.2 gpm for surface water, and 2.9
gpm for well water.
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