Ceravision UV420 User manual

UV420 HEP Plasma Grow-Light
User Guide

Copyright Ceravision Ceravision UV420
Doc No. CVL2018-2390 v1 –Nov 2018 1
1. Introduction
Thank you for purchasing the Ceravision UV420 unit.
Recent research has shown that plants benefit in many ways from timely exposure to UV-A light
including: increased plant yields, bigger and faster growth, increased nutritional levels; improved
resistance to fungal infections; and changing growth pattern, chemistry, and transpiration
processes. Timely lighting with low level UV-B is also good as UV-B induces photomorphogenic
reactions in some plants.
The following is a guide to the installation, use and maintenance of the Ceravision UV420 unit.
Please read carefully before installation and only use the UV420 unit in accordance with the
directions included in this user guide.
2. Pack Contents
1. Ceravision UV420 unit:
2. Alternate UV-B transmission reflector filter; and
3. 3-metre power cable.
Fig 1: Exploded View of the UV420 Unit
B. Hanging Brackets
H. Reflector Hinges
E. Heat Sink
G. Reflector Mounting
J. Filter & Bezel
I. Filter Retaining M4 Socket
F Alternate Filter
D. IEC Power Input Socket
A. Mounting Points
C. Fans

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Fig 4: Enhanced UV+ Transmitting Filter
(BLUE BEZEL)
The unit is supplied with the ‘Standard Blue-light and UV-A Transmitting Filter’(WHITE
BEZEL) fitted in the UNIT and the ‘UV-B Transmitting Filter’ (RED BEZEL) as the alternate
glass retained on the side of the UNIT.
The ‘Enhanced UV+ Transmitting Filter’
(BLUE BEZEL) can be purchased separately
if required from your supplier.
3. Symbols Used
Warning! A warning indicates severe damage to the user and/or product
may occur when a procedure is not carried out as described.
Caution! A caution sign indicates problems may occur if a procedure is not
carried out as described; it may also serve as a reminder to the user.
UV risk Group 3 IEC 62471. WARNING: UV emitted from this product.
Avoid eye and skin exposure.
Not to be mounted on normally flammable surfaces.
Note: A note gives additional information, e.g. in respect of a particular
procedure.
Fig 3: UV-B Transmitting Filter
(RED BEZEL)
Fig 2: Blue Light & UV-A Transmitting Filter
(WHITE BEZEL)

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This symbol indicates that parts of the fixture can reach very high
temperatures (>85 °Celsius). A cool down period is necessary before
performing maintenance.
With this symbol, Ceravision declares that this product complies with legal
European requirements.
This symbol indicates that any cracked protective shield must be replaced.
The symbol on the material, accessories or packaging indicates that this
product may not be discarded as household waste. Dispose of the
equipment through a recycling centre that handles electronics and electrical
appliances within the EU, and in other European countries that use separate
collection systems for used electronics and electrical appliances. By
disposing of the equipment in the proper way, you will be helping to
prevent possible risks to the environment and public health, which might
otherwise be caused by improper handling of the discarded equipment.
Recycling of materials contributes to the conservation of natural resources.
This product must be disposed of in an environmentally sound manner
when it is discarded, e.g. at the end of its life. Please refer to the terms &
conditions of sale for details of the WEEE Producer Compliance Scheme
available to Ceravision customers.
This symbol is an internationally recognized symbol used to designate
recyclable materials.
4. Applicable Standards
EN 60598-1: 2015
Luminaires –part 1: General requirements and tests.
EN 62471: 2015
Photobiological safety of lamps and lamp systems.
EN 61000-3-2: 2014
Electromagnetic compatibility (EMC). Limits. Limits for harmonic
current emissions (equipment input current ≤16 A per phase).
EN 61000-3-3: 2013
Electromagnetic compatibility (EMC). Limits. Limitation of
voltage changes, voltage fluctuations and flicker in public low-
voltage supply systems, for equipment with rated current ≤ 16 A
per phase and not subject to conditional connection.
EN 61547: 2015
Equipment for general lighting purposes. EMC immunity
requirements.
EN 55011+A1 2016/2017
Industrial, scientific and medical equipment. Radio-frequency
disturbance characteristics. Limits and methods of measurement.
EN 50581: 2012
Technical documentation for the assessment of electrical and
electronic products with respect to the restriction of hazardous
substances.

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Fig 5: Top View of Unit
Fig 4: Side Elevation of Unit
5. Recommendations for Use
The unit is intended for use in indoor damp and humid conditions but NOT for use outdoors or in
very wet conditions. Do not expose the unit to:
1. Ambient temperatures in excess of 30oC; or
2. Environments with excessive dust; or
3. Environments with excessive moisture; or
4. Direct water spray.
The unit is hot when in use and may cause burns. Allow to cool after disconnecting power before
handling. The unit emits UV radiation in the UV-A and UV-B ranges. The amounts of UV-A and
UV-B depend on the transmitter filter (glass) used in the reflector assembly (see Section 7).
6. UV420 Installation
Refer to local regulations and rules prior to installation.
Prior to installation and use, please check the unit for any signs of damage. In particular, check
glass for signs of breakage or cracks. DO NOT power-up or use the unit if there are any signs of
damage to the unit or to its power lead. If any
damage is present, please return the unit to your
point of purchase.
The unit is fitted with hanging brackets with
several mounting points designed to allow for a
variety of installation methods. Choose the
method appropriate for your particular use.
Ensure the method used to secure the unit is
suitable for safely holding the 10 kg unit in a
vertical position and without excessive
movement. Ensure that the fans on the top of the
unit are not covered.
Once the unit is installed, it can be turned on
by connecting the power lead to the IEC
socket (see Figure 1) and switching on the
power at the mains. The unit is compatible
with standard contacters and plug timers.
The UV420 uses an automatic starting process
to excite the plasma and the ignition process
will commence immediately.
This process makes a clicking sound and the sound may continue even whilst the plasma has lit. If
the unit fails to start, it will automatically try again after 30 seconds –DO NOT un-plug the unit
during this time. It may take several attempts to complete the ignition process and up to five
minutes to light up.
If it fails to start after 10 consecutive attempts then the unit will disable itself and will require

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Fig 6: Relative Light Quantity 200 nm to 800 nm.
repair to rectify the issue preventing successful ignition; in which case please contact point of sale.
When the unit is switched-off and then on again, it will not attempt to automatically restrike until
four minutes have elapsed.
7. Selecting Appropriate Transmitting Filter
The UV420 is able to supply UV-A (315-400 nm), UV-B (280-315 nm) and visible light (400 –
800 nm) radiation and is designed as a complementary lighting unit to be used alongside other light
sources used for horticulture. The enhanced UV+ transmitting filter is available to purchase
separately if required.
The unit is supplied with the ‘Standard’ Transmitter fitted in the reflector and the ‘UV’ Transmitter
as the alternate retained on the side of the unit. The ‘Enhanced UV+’ Transmitter Filter can be
purchased separately if required from your supplier.
Exposure to extended period of ultraviolet light can be harmful to crops. However, choosing the
right type of ultraviolet at the right time of a particular plant’s growth cycle can deliver huge
benefits.
Different plants benefit differently from UV-A and UV-B at different stages in their growth cycle.
The particular exposure-times for UV-A and UV-B will depend on the plants and the stage in the
growth cycle; you should seek expert advice and/or run controlled trials.
The quantity and wavelength of light reaching the crop can be modified according to the
transmitting filter used:
1. Standard Transmitting Filter (WHITE BEZEL): provides blue light and UV-A (see BLACK
LINE in Figures 6 and 7 below).
2. UV Transmitting Filter (RED BEZEL): provides increased UV-A and UV-B (see RED LINE
in Figures 6 and 7 below).
3. Enhanced UV+ Transmitting Filter (BLUE BEZEL): provides for maximum UV-A and UV-
B (see BLUE LINE in Figures 6 and 7 below).

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Fig 7: Relative Light Quantity 260 nm to 400nm
Changing the mounting height of the unit will change the area of coverage provided but also
decrease the intensity of the UV and visible radiation (see Figure 8 below).
Due consideration should be taken of mounting height of the unit with respect to the crop being
grown.
In Figure 9 below, the ‘Mounting Height’ is the measurement from the bottom of the reflector
housing to the working surface.
Fig 8: Contour Plot of the Light Spread of the UV420

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8. Glass Replacement Procedure
To change the transmitter filter from one type to the other please follow the instructions below:
1. The change of filter can be done with the unit in situ, without removing it from its normal
operating position.
2. Turn off the power to the unit; allow the unit to cool.
3. Using a 3 mm hexagonal key undo the M4 socket cap at the top of the reflector casing.
4. Support the reflector filter as it swings on its two hooks away from the unit.
5. The M4 socket cap remains in place.
6. Unhook the swinging transmitter filter from the unit and store safely.
7. Remove the alternate filter that is held on the side of the unit.
8. Put the filter removed from the unit into the brackets on the side of the unit
9. Hook this replacement transmitter filter into position.
10. Connect into the M4 socket cap and tighten the socket cap so that the filter is held securely.
11. Check the transmitter filter and reconnect the power to the unit.
12. Please wait four minutes before switching the unit back on.
Fig 9: Area of Light Coverage Dependant on Unit Height

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9. Replacement Reflector Glasses
The front glass is specifically designed to permit the transmission of specific wavelengths of light.
The nature of UV is that the transmitter filters will naturally suffer from ‘solarisation’, which
means that they lose the ability to control the passage of UV-A and UV-B and will deteriorate over
time. In order to maintain the unique performance of the UV420, we recommend that the reflector
filters be replaced as follows:
1. Blue light transmitter after 24,000 hours of use or 4 years.
2. Low UV transmitter after 12,000 hours of use or 2 years.
3. High UV+ transmitter after 12,000 hours of use or 2 years.
Always source replacement transmitter filters from Ceravision or an authorised Ceravision
distributer. The use of a non-Ceravision authorised filter in the unit will invalidate the Terms &
Conditions and Warranty. When ordering replacement filters please specify the exact unit
description and filter type, e.g. UV420 and the particular filter that you require.
10. Cleaning and Maintenance
External factors such as dust and moisture may cloud the glass and reduce the efficiency of the
unit. The unit would therefore benefit from routine cleaning of the glass. Do not carry out
maintenance or cleaning whilst the unit is connected to the mains; disconnect all power and allow
to cool prior to cleaning.
The outside of the unit and the glass can be cleaned using non-abrasive household cleaning
materials. Use of abrasive materials may damage the glass and will invalidate the warranty. Take
care not to damage or contaminate the reflector filter during cleaning.
During routine cleaning, the unit should be checked for any signs of damage.
Opening the unit itself will invalidate the warranty.
11. Working with UV
Ceravision’s UV420 unit is an intense light source, which emits UV-A, UV-B and visible light.
The unit should never be operated with the light source directly visible. The reflector housing and
glass should always be correctly positioned and fitted in the unit at all times during its operation.
The unit should not be used if the front glass is broken or cracked. Check the unit prior to
installation and continue to do so during cleaning and routine maintenance.
If the glass becomes damaged during use, disconnect the power source immediately and do not use
the unit until the problem is rectified and replacement found.
When working with these units, users MUST be protected from exposure to harmful levels of
radiation. Those working with UV-emitting light sources should be trained in the potential hazards
and in the use of suitable protective equipment to prevent harmful exposure.
We recommend you refer to the following HSE publications: ‘Guidance for Employers on the
Control of Artificial Optical Radiation at Work Regulations (AOR) 2010’; and ‘Reducing Health
Risks from the use of Ultra-Violet Tanning Equipment’.

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We recommend that full body coverage and UV blocking protective glasses be worn in areas where
the units are operating. When working with UV emitting sources, users are recommended to
monitor UV levels using appropriate UV-A and UV-B meters and adhere to the exposure limit
values; these are normally displayed as a maximum exposure time in each case.
12. High Temperatures
Ceravision’s UV420 unit can reach temperatures in excess of 190oC. Allow to fully cool before
handling.
13. Disposal and Recycling
This product must be disposed of in an environmentally sound manner when it is discarded, e.g. at
the end of its life. Please refer to the terms & conditions of sale for details of the WEEE Producer
Compliance Scheme available to Ceravision customers. The user is entirely responsible for the
disposal and/or recycling of this unit.
14. Technical Data
Product Name
Ceravision UV420
Manufacturer
Ceravision Lighting Limited
Power Consumption
430 Watts
Mains Supply Voltage
110-240 Volts at A/C 50-60 Hz
Weight
10 kg
Dimensions
400 mm x 195 mm x 400 mm
Ambient Operating Temperature
0oC to 30oC
IP Rating
IP20
15. Disclaimer
Ceravision Lighting Sales Limited does not authorise its products for use as a critical component
where a malfunction or failure may reasonably be expected to result in significant injury to the
user. Information in this publication is provided only for your assistance and is subject to change
without notice. Please read in full prior to commencing installation and retain for future reference.
16. Guarantee
1. Subject to its UK and Europe Terms & Conditions and Warranty Policy, Ceravision Lighting
Sales Ltd guarantees the Unit for three (3) years based on maximum burning of 4000
hours/year. In the case of more than 4000 hours/year, this period will be adjusted pro-rata.
2. This Warranty is only valid when the Unit is properly installed and operated as specified in
the Product Datasheet. Any repairs or alterations however minor will invalidate this warranty.
4. If a Product is found to be defective the Purchaser must notify Ceravision Lighting Sales
Limited in writing prior to expiration of the warranty period.
5. Please refer to website at www.ceravision.com for more details.

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Ceravision Limited, Ceravision House, Sherbourne Drive,
Tilbrook, Milton Keynes, MK7 8HX, United Kingdom
t: [phone]
e: [email protected]