Hydrotech DLR-4M_7M Ultraviolet Water Disinfection Unit - Manual (Page 4)

O & M Manual DLR-M, 4-7
08/05 – Rev. 6 4
Pre-Installation Instructions
Before you
begin Perform the following pre-installation steps:
Step Action
1 Ensure that your DLR-M 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 transmittance of 70%. If your
transmittance 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 148 psi.
If the pressure is… Then…
Less than 148 psi Proceed to step 4
Greater than 148 psi Install a suitable pressure-reducing valve in
the water inlet pipe to the disinfection unit.
4
Fill in the following information and retain for future reference.
Series________________ Model_____________________
Date Purchased:_______________ Date Installed:_________________
Water pressure (psi):___________ Water flow rate (gpm):__________
5 Select a location that meets the following guidelines.
• The unit must be installed between the cold water source and the water heater as
inlet temperature must not exceed 100 o F. (See Figure 1 for proper installation
sequence.)
• The disinfection unit can be installed either horizontally or vertically. (See Figure
3 for water flow direction.)
• There must be enough clearance to remove the UV lamp and the quartz sleeve for
replacement and regular maintenance. Recommended clearance is length of unit
plus four inches. (See Figure 4 for additional clearance requirements.)
• The unit must be within 7 feet of a properly grounded, dedicated 110V electrical
outlet. A 7'5" cord is included with the unit.
• The unit must be protected from freezing. Freezing damage will void the warranty.
• The unit should be placed where a potential leak will not cause water damage.
WEDECO is not responsible for water damage.