Lightwave LTW-4 Series, Инструкции по эксплуатации и установке

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8 | P a g e
System Sizing
All UV systems are rated for a specific flow rate in water that meets the quality parameters on
page 5. PLEASE NOTE that increasing the flow above this rating or disinfecting water that does
not meet the quality parameters will decrease the dose and therefore compromise the micro-
organism inactivation.
To determine flow rate follow these simple steps:
Be sure no water is being used in the home. Open a faucet or tap nearest the pressure system
and run until the well pump starts. Close the faucet and using a second hand watch, record the
length of time in seconds until the pump stops. This is known as the cycle time.
Then using a container of known volume, preferably in US Gallons, open the faucet or tap near-
est the pressure system and measure the amount of water drawn off until the pump starts again.
Depending on the size of the container used, it is acceptable to turn the faucet on and off to
empty the container. This measurement is known as the draw down.
To calculate the pressure system flow rate divide the draw down by the cycle time and multiply
that by 60.
Draw Down__________÷ Cycle Time____________ x 60=__________Pumping Rate in USGPM
Location
For Point of Entry (POE) systems, choose a location where the main cold water line is accessible.
The system must be installed after other water treatment equipment (softener or filters), but
before any branches (See Figure 1). For Point of Use (POU) systems, install the unit just before
the faucet. LIGHTWAVE recommends that a 5 micron filter be installed before the UV system for
a final polishing step before the water is disinfected.
Figure 1. Recommended POE Installation Location