Hydrotech DLR-4M_7M Ultraviolet Water Disinfection Unit - Manual (Page 12)

O & M Manual DLR-M, 4-7
08/05 – Rev. 6 12
Start-Up Sequence
Before using
the unit… Follow the start-up procedures below.
If your unit has… Then…
UV sensor and no
solenoid valve The UV sensor is self-calibrating on initial start-up. Proper calibration requires
water flow through the unit.
• Sanitize your system before using your household water (see maintenance
section for instructions.)
• Slowly fill the unit with water.
• Flush the UV system for 5 minutes prior to start-up.
• Plug power cord into wall outlet.
• Within the first 5 seconds of applying power, press and hold the RESET
button for 5 seconds to set internal "Days" counter to 365. The alarm buzzer
will beep three times and all LEDs will blink three times to indicate that the unit
has been reset. Release the reset button.
• Wait 30 seconds. If the lamp is functioning properly, the "Lamp On" LED will
light and the internal "Days" counter will begin counting down from 365.
• Wait at least 30 minutes, then the UV intensity “High” (green) LED will light
up.
UV sensor and
solenoid valve The UV sensor is self-calibrating on initial start-up. Proper calibration requires
water flow through the unit.
• Sanitize your water system before using the disinfection unit (see maintenance
section for instructions).
• Slowly fill the unit with water.
• Flush the UV system for 5 minutes prior to start-up.
• Plug power cord into wall outlet.
• Within the first 5 seconds of applying power, press and hold the RESET
button for 5 seconds to set the internal "Days" counter to 365. The alarm buzzer
will beep three times and all LEDs will blink three times to indicate that the unit
has been reset. Release the reset button.
• Wait 30 seconds. If the lamp is working, the "Lamp On" LED will light and the
internal "Days" counter will begin counting down.
• Wait 30 minutes. The sensor will be set to 100% and the UV Intensity "High"
(green) LED will light up.
• Note: The Normally Closed Solenoid Valve is energized when power is
applied to the control box.
UV Sensor
Calibration and
Sanitization ***IMPORTANT NOTE***
The 30-minute time period before the High UV intensity LED lights is provided to
inhibit alarms during the sanitization process.
Example: When chlorine is used to sanitize the system, the 30 minute period allows
for initial system sanitization and subsequent flushing of the piping with fresh water
without causing a UV alarm.