Hallett 15xs Instruction Manual
Released on 11-Jul-13 – H800003Q
Page 6
UV Pure Technologies Inc. © 2013
2.
I
NSTALLATION
I
NSTRUCTIONS
Before Beginning Installation
Water Conditions - Pre-treatment Parameters
Note this section is designed to ensure the optimal performance of your Hallett
system. Please review the following pre-treatment parameters prior to
installation.
If any specifications are of concern or unclear please contact your water
treatment dealer or specialist. Note some of the information below is technical in
nature and you may want to contact your water treatment specialist to review the
parameters.
IMPORTANT -
Should any of the following water parameters exceed the
recommended limits; the system will not be serviceable under warranty.
Water Parameters for Treating Drinking Water
:
The minimum water requirements for operating the Hallett 15xs system are:
UV Transmittance
(UVT) – more than 75 percent transmission of
ultraviolet light (if there is color in the water the UV transmittance may
fall below 75 and the system will not provide the necessary UV dose for
safe drinking water). It is recommended for the water to be tested for UV
transmittance in any applications using cisterns, surface water or
ground water under the influence of surface water.
Total Dissolved solids (TDS)
- must be less than or equal to 1000
mg/L (mg/L=ppm)
Level of turbidity
- or cloudiness - of less than or equal to 1 NTU
(nephelometric turbidity unit). A 5 micron sediment filter is
recommended before the unit to reduce turbidity (the presence of a filter
will also simplify disinfection of plumbing – see Disinfecting the
Plumbing. For surface waters, a dual gradient pre-filter (75x25 or 50x5)
is recommended.
Water Capacity:
Hallett 15xs
The water treatment range for the Hallett 15xs is 0–55 liters per minute (or 0–
14.6 U.S. gallons per minute) max, with a working pressure of 69–690 kPa (or
10–100 psig). The nominal flow rate of the unit is 50 liters per minute (13.2 U.S.
gallons per minute),
The Hallett 15xs includes a flow regulating device that will limit the flow rate.
Warning:
Removal of this device may allow the water flow to exceed the
validated performance of the system which therefore may not provide the
necessary UV dose to inactivate all pathogens.
Temperature Requirements:
Where the unit is installed, the ambient temperature should be between 1–40°C
(34–104°F). If the temperature drops below freezing, drain the unit completely to
