Specifications
14
17.2 Do I Need To Turn My EUV Unit Off When I Clean My Filter? - No, the ow sensing pressure
switch that is part of your EUV unit will automatically shut the UV bulb off until proper water ow inside
the EUV unit is re-established. Should you need to turn your unit off for any reason, this is accomplished
by simply unplugging the EUV unit from its power outlet.
17.3 Will A Time Clock On My Pool Shorten My Bulb Life? - Some shortening of the bulb life can be
expected when the EUV unit is turned off and back on frequently. A daily on/off cycle will not create a major
bulb life issue however, frequent on/off cycles should be avoided.
17.4 Is There Any Residual Effect From UV? - No, UV light is used as a control and is applied only to
the water that passes inside the EUV wet chamber in visual contact with the UV transmission from the
UV bulb.
17.5 Can The EUV Unit Be Mounted Horizontally? - No, vertical mounting is required to maintain the
weatherproof integrity of the electrical enclosure bonnet.
17.6 Can The EUV Unit Be Installed Below The Pond or Pool Waterline? - The EUV unit has a
pressure switch that controls the on/off cycle of the UV bulb when the pump stops or starts. If the EUV unit
is installed (example, in a vault below the waterline of the pond or pool), a static head of water pressure
may be sufcient to cause the pressure switch to remain closed, which means that the UV bulb will remain
lit at all times while the EUV unit is plugged into its power source. Contact Delta UV or your supplier for
a different type of pressure switch (Part # 70-02301) that can be adjusted to allow for this static water
pressure in the EUV wet chamber. Installation of this type of pressure switch takes only a few minutes
and will restore the desired ability of the bulb to be turned off automatically when pumping is interrupted.
DO NOT OPERATE YOUR UNIT WITHOUT A PROPERLY WORKING PRESSURE SWITCH. To check
your switch to see if it functions properly, follow the instructions given in Sec. 18.
17.7 Can Multiple Units Be Used Together For Larger Systems? - Yes, you can add any number
of EUV units to a plumbing bypass manifold system to allow for larger outputs and ow rates beyond
the capacity of a single E-40 or ES-40 unit. Delta UV also manufactures a large capacity system, the
Elektra® Max UV system, that incorporates factory installed hydraulically balanced piping and multiple
tanks contained within a metal enclosure. The Elektra Max system features the latest technology in high
output UV bulbs, dubbed Amalgam bulbs. Contact Delta UV or your supplier for information on the Elektra
Max product line, or to obtain a drawing showing the proper method of plumbing multiple EUV units for
larger applications.
17.8 Must I Use A GFCI (Ground Fault Circuit Interrupter) With My UV Unit? - Yes. A 15 Amp 120V
GFCI can be factory installed in your EUV unit at time of manufacture (optional), or you can install it in
the electrical receptacle that is used to power your EUV unit. Additionally you can install it in the electrical
panel (GFCI breaker) that services the electrical circuit of your EUV unit, or if you want to install the eld
retrot weatherproof cord connected GFCI, it is easily installed on the end of the EUV unit’s electrical
power cord. Installation is simple and takes only a few minutes by following the simple directions supplied.
No special tools are required. You can order the cord connected GFCI kit (Part # 70-09012) from your
supplier or from Delta UV.
18.0 Troubleshooting – The list below will help guide you through any problems you may have at time of initial
installation or in the future. For additional assistance, contact your supplier or Delta UV at the address, e-mail,
fax or phone shown at the end of this manual.
18.1 The UV Bulb Will Not Light - If this occurs upon initial start-up, the problem could be caused by a
number of issues.
a.
The pressure switch is open. This is caused by low pressure in your system. Make sure the pump is
on (the bulb will only light when there is 5 psi water pressure inside your EUV unit’s wet chamber).
Verify that the pressure gauge reads 5 PSI or more. If it does not read at least 5 psi, reduce ow
exiting the EUV unit by partially closing the valve on the discharge piping exiting the EUV unit. This
will increase the pressure inside the EUV wet chamber. - A low pressure 1/2 psi pressure switch
(P/N 70-02315) is also available and can be installed in lieu of the 5 psi pressure switch supplied.