Hydrotech DLR-AP Ultraviolet Water Disinfection Unit - Manual (Page 4)

Pre-Installation Instructions
IMPORTANT
Please read before installing your Ultraviolet System
When this unit is wired in conjunction with another electrical devise you may experience a drop in voltage. It is recommended
that your Ultraviolet System NOT share a circuit with another electrical device. The maximum voltage threshold for this
system is 130V. The minimum voltage threshold for this system is 105V. Please ensure that proper voltage requirements are
meet before installing your Ultraviolet System.
Please read before installing your Ultraviolet System
IMPORTANT
Before you
begin Perform the following pre-installation steps:
Step Action
1 Ensure that your DLR system is correct for your flow capacity (see Flow Rate Tables
in Technical Specifications.)
2 Ensure that your water supply meets water quality standards as shown in the table
below. If any of the elements exceed the recommended maximum, we strongly
suggest, at a minimum, that you install a 5-micron sediment filter as particles in the
water can reduce UV light intensity and affect performance. Contact the distributor for
additional information about testing and pretreatment equipment.
Element Recommended
maximum levels
(1mg/l = 1ppm)
Actual
Suspended solids <5 mg/l
Color None
Iron 0.3 mg/l
Manganese 0.05 mg/l
pH 6.5 to 9.5
Hardness <120 ppm
Note: All models are rated for a minimum UV transmission of 90%. If your
transmission is lower, consult the distributor.
3 Check the pressure of the water supply. The WEDECO UV system is designed to
operate at pressures up to 125 psi.
If the pressure is… Then…
Less than 125 psi Proceed to step 3
Greater than 125 psi Install a suitable pressure-reducing valve in
the water inlet pipe to the disinfection unit.
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Fill in the following information and retain for future reference.
Unit Model No.________________ Serial No._____________________
Date Purchased:_______________ Date Installed:_________________
Water pressure (psi):___________ Water flow rate (gpm):__________
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