6
Never use PVC pipe directly connected to unit. PVC pipe and ttings can
be used after 90º metal elbows are connected to the inlet and outlet of the
chamber eg. brass ttings. Larger diameter pipe may be used to minimise
resistance to ow, but maximum ow rates should not be exceeded, as
correct water treatment cannot be assured at higher ows. If ows may
exceed the design maximum, install a ow restriction device.
At no stage should the UV system be operating without water present inside the
chamber. Damage to the system could result.
If the system is bypassed, the unit should be switched off to avoid over heating
and alarming.
LED Indicators
The Sterio control box has a red LED alarm indicator light mounted on its front
panel, adjacent to the amber “power on” LED. This light will be illuminated whenever
the Sterio control box senses no lamp current. There is also an audible alarm in the
event of lamp failure. The LED and/or alarm will only work when unit is connected to
the correct electrical supply.
Flashing of the red LED indicates normal operation and the lamp countdown timer
is operating.
Should the unit alarm, power to the pump will be interrupted ensuring safe
water is always supplied. Manual overriding of this feature is available by
briey pressing the reset button once for emergency water supply.
If pump outlet is not required retain plastic guard supplied on pump outlet.
Alarms
1. Intermittent beeping indicates that the lamp requires changing and can be silenced
for 24 hours by pressing the reset button to allow for a new lamp to be obtained. It
is good practice to have a spare lamp on hand to ensure a quick changeover.
2. In the event of a system failure or bad connection, the alarm will continuously
sound and the red LED will light up. Power to the pump connection (if used) will be
disabled to ensure only treated water is delivered. For emergency water supply,
the reset button can be pressed, but note that the water may be unsafe.
The alarm function or lamp can be checked as follows:
1. Switch off mains power to the lamp power supply and remove plug from outlet.
2. Disconnect the lamp.
3. Allow one minute delay to reset the lamp ballast.
4. Reconnect the existing or replacement lamp.
5. Reconnect the power.
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