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P a g e
Cleaning the UV Sensor (if applicable)
Depending on the water quality, the UV sensor may require periodic cleaning. At a minimum, the UV sensor should
be cleaning on an annual basis. The following steps outline a basic cleaning procedure.
Step 1: If the system has an inlet shut-‐off valve, shut this valve off to prevent water flow through the system. If
there is no inlet shut-‐off valve, turn off main water inlet valve (and turn of water pump if you have one).
Step 2: Disconnect the power cord of the UV system from the electrical outlet.
Step 3: Release water pressure by opening a downstream tap and close the outlet shut-‐off valve if the installation
incudes one (if there is no outlet shut-‐off valve, be prepared for water leakage from the system as the head
pressure in the system will cause water to flow back through the outlet plumbing and through the unit).
Step 4: Place a container under the unit to catch any water that may come out of the unit during the removal of
the UV sensor.
Step 5: Unscrew (counterclockwise) the sensor nut from the unit and pull the sensor slowly out of the sensor port.
Step 6: Holding the sensor in your hand wipe the flat portion (sensor face) of the sensor with isopropyl alcohol
using a clean lint-‐free cloth.
Step 7: Replace sensor as per instructions on pages 8-‐9 of the manual.
Operation
The CALMAG YORKSHIRE LIMITED system comes with a feature laden controller that incorporates both the lamp
driver (ballast) and control features in one water-‐tight case. CAUTION: Prior to performing any maintenance on
your UV system, you must always disconnect the power.
CALULTRA DOMESTIC CONTROLLER
This controller features a power factor corrected, constant current lamp
driver with a universal power input. A full colour LCD screen provides the
user with a detailed description of the system’s performance in addition
to providing any applicable fault messages and system diagnostics. All
controllers include an “infinite expandability port” located on the right
side of the controller. Simply plug in an optional UV sensor module into
the expandability port of the controller and the system will now monitor
the UV intensity of the system. Please call for details, price and
availability.
