Davey UV40-20/UV75-25/UV130-40 Steriflo Ultra Violet Water Treatment Systems - Manual (Page 4)

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Maintenance continued...
Reverse procedure when replacing sleeve.
When replacing quartz sleeve after cleaning, the sleeve should stick out about 1cm
at each end. Place oring over closed nut end and fit closed nut, fastening it hand
tight. Hold the other end of the sleeve in position during the tightening with the
other hand, then fit open end oring and cap.
A tiny amount of silicon spray or CRC in the end of aluminium endcap threads will
aid easy tightening. Do not use excessive force when tightening nuts. Do not re-
use quartz sleeve if damaged.
Water Quality
Where the water being pumped contains unusually high levels of dissolved solids
(hard water), iron, manganese or biological organisms, a deposit build up on the
quartz sleeve may occur over time. This will compromise the effectiveness of the
UV system and the sleeve should be cleaned as required to maintain it in a clean
condition. Discoloured water will reduce the effectiveness of the UV system and
filtration should be installed.
Lamp Fail Alarm
- SF800S, SF900S, SF940S, UV40-20 & UV75-25
All models are fitted with an alarm buzzer which sounds if the lamp is not running.
To test the alarm, switch off the power to the Steriflo
® at the mains and unplug,
disconnect the UV lamp (white socket inside long endcap) and switch the power on
again, the alarm should now sound.
Lamp Alarm System - SF1000S and UV130-40
If the UV lamp is out due to a failure or bad connection the alarm buzzer will sound
and the red LED will light. If fitted, the optional alarm contacts will changeover.
These are able to close a normally open solenoid valve. The alarm function can
be checked by switching the unit off, disconnecting the lamp and then switching
the unit back on.
The lamp should be replaced after a year’s running time. The alarm will beep
intermittently after the internal clock has measured this time as a reminder to
change the lamp. Pressing the recessed ‘reset’ button with a ballpoint pen will
silence it for 24 hours at a time to allow time for a new lamp to be obtained. Once
a new lamp is installed press the reset button for 5 seconds to start another year’s
timing. Do this whenever a new lamp is installed.
Trouble Shooting
Principle. The basic electrical circuit is like a fluorescent light. A ballast (choke)
provides the correct voltage and current for the lamps, a starter provides a high
voltage to start the lamp. The circuit board monitors the current to the lamp and if
it is not present, illuminates the red alarm light and sounds the alarm buzzer (a
“squealing” noise). An orange light indicates the power is on.
a) UV LAMP OUT, NO ORANGE “ON” LIGHT, NO ALARM
1. No mains voltage.
2. Internal fuse failed.
3. Check mains power connections inside power supply.
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Choosing a Site
Choose a site with a firm mounting position. Allow room for removal of the lamp
and sleeve during servicing. Leave a chamber lengths space at the lamp
connector end for lamp removal, with 100mm free at the other end for access to
the end nut. The ‘open’ end nut and the blank end nut are interchangeable, so
lamp removal can be from either end.
Housing your Davey Steriflo ® System
To protect your Davey Steriflo ® system from the weather, make sure the site is both
water proof, frost free and has adequate ventilation. The unit should be either
horizontally mounted with the inlet and outlet facing upwards or vertically mounted
with the inlet at the bottom. Allow for drainage, to avoid damage to flooring etc.,
that over time may occur from leaking pipe joints or seals.
WARNING: Some insects, such as small ants, find electrical
devices attractive for various reasons. If your site or enclosure is
susceptible to insect infestation you should implement a suitable
pest control plan.