DARAY EXCEL User manual

EXCEL
LED Dental Examination Light
Operating & Installation Manual
QAM.EXCEL.0119.4

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Table of Contents
1. Introduction........................................................................................... 3
1.1 Supported Lights ................................................................................ 3
1.2 Installation Notice .............................................................................. 4
1.3 Pre-Installation Responsibilities and component packing list ............................ 5
1.4 Technical Drawings ............................................................................. 6
2. Technical Specifications ............................................................................ 8
3. Operation.............................................................................................. 9
3.1 Pre-Start Checks ................................................................................ 9
3.2 Motion Sensor Operation ....................................................................... 9
3.3 Manual Switch Operation .................................................................... 10
3.4 Handles ......................................................................................... 11
4. Installation Guide Section ........................................................................ 12
4.1 Ceiling Mounted Version (EXCELC) ......................................................... 13
4.1.1 Considerations ........................................................................... 13
4.1.2 Attachment methods and void suspension .......................................... 14
4.1.3 Lighting configuration .................................................................. 15
4.1.4 Affixing the Ceiling plate .............................................................. 15
4.1.5 Downtube adjustment and installation .............................................. 16
4.1.6 Wiring and transformer layout ........................................................ 18
4.1.7 Arm installation ......................................................................... 19
4.1.8 Fitting the lighthead.................................................................... 20
4.2 Wall Mounted Version (EXCELW)............................................................ 21
4.2.1 Considerations ........................................................................... 21
4.2.2 Lighting configuration .................................................................. 22
4.2.3 Attaching the Wall mount bracket ................................................... 22
4.2.4 Arm installation ......................................................................... 22
4.2.5 Wiring and transformer layout ........................................................ 23
4.2.6 Fitting the lighthead.................................................................... 24
4.3 Floor Mounted Version (EXCELDFM) ........................................................ 25
5. Maintenance ........................................................................................ 27
5.1 Maintenance schedule........................................................................ 27
5.2 Safety Precautions ............................................................................ 27
5.3 Product cleaning & care guidelines ........................................................ 28
5.4 Fuses and their replacement ................................................................ 29
6. Adjustment of Arm Balance to Eliminate Drift ................................................ 30
7. Troubleshooting Guide ............................................................................ 31
7.1 Safety Precautions ............................................................................ 32
8. Spare Parts .......................................................................................... 32
9. Warranty Information ............................................................................. 33
9.1 Returns Policy ................................................................................. 33
9.2 Warranty Details .............................................................................. 34

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1. Introduction
Thank you for choosing a Daray EXCEL dental light.
The Excel lights are specifically designed to meet the demanding needs of today’s
dental industry whilst providing the finest quality design with superior performance,
reliability and value. The EXCEL is mounted on Daray’s characteristic balanced
suspension arm system. It features a motion controlled sensor on the underside of
the lighthead which can be used to power the unit on and off. This sensor can also be
used to control the variable intensity of the light, reducing the need to touch any
surfaces.
This user & installation guide contains all the information you need for installation,
operation and maintenance.
For further information on our product range and find out more about our company please
visit www.daray.co.uk or call 0333 321 0971 or 0800 804 8384.
This product was designed & manufactured in Great Britain by:
Daray Ltd.
Edison House
Robian Way
Swadlincote
Derbyshire
DE11 9DH
1.1 Supported Lights
The Following Models are supported in this Manual
EXCELC
EXCEL LED Dental Examination Light - Ceiling Mounted
EXCELCS
EXCEL LED Dental Examination Light - Ceiling Mounted (short reach)
EXCELW
EXCEL LED Dental Examination Light –Wall Mounted
EXCELWS
EXCEL LED Dental Examination Light –Wall Mounted (short reach)
EXCELU
EXCEL LED Dental Examination Light –Unit Mounted
EXCELDFM
EXCEL LED Dental Examination Light –Floor Mounted

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1.2 Installation Notice
With over 50 years of experience, DARAY take pride in offering consultancy and providing
guidance on the installation and use of our lighting range.
Should you ever require any advice with the installation or operation of one of our
devices, please contact our Service Delivery Helpline on 0800 878 9864 or online at
[email protected].uk We have a team of dedicated technical engineers and service
representatives who are capable of providing guidance or bespoke solutions for most
situations.
DARAY offer installation services with our equipment. If you choose to opt out of our
installation service, DARAY cannot be held responsible for the installation of the product
detailed in your order. Should the product be incorrectly installed, violate health &
safety, or cause injury to a third party, the responsibility is with the installer. As such we
feel it necessary to provide the following general guidance.
The location of each light should be given careful consideration; based upon the
intended area, the lights reach, which part of the body the light is being used for
and the preferences of the end user.
Confirm the structural suitability of the installation area before commencing any
work. If there is any doubt it may be necessary to involve structural engineers to
verify suitability of the area.
Commissioning of our light fittings should always be carried out in collaboration
with the end users,
Commissioning should include basic training in the operation of the unit before it
is used
This ensures that the units are correct for the user, installed in the correct
location for the intended usage, and that sufficient provision has been made
to avoid mishandling of the unit.
Every effort is made to provide the most accurate and up to date instructions in the
easiest manner but if you require more help we would like to encourage you to contact
us, as any deviation or failure to adhere to our installation procedures can result in:
limited movement of the light
Improper functionality
Lasting damage to the product
Damage to the install location
Health & Safety non-compliance
And in extreme circumstances could cause physical injury
If you are unsure of ANYTHING, please contact us before any attempt at installation is
made. Customer safety is essential to us and it is our job to ensure optimum product
performance in line with their design.
If you have any questions relating to our products, or if you are seeking guidance in line
with what is recommended above, please call our Service Delivery Helpline on 0800 878
9864, or ask one of our dedicated Sales team.

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1.3 Pre-Installation Responsibilities and component packing list
This document is a guide to the steps that need to be performed to correctly install
the EXCEL dental light unit. However, the work required to be performed is the
responsibility of the owner or designated contractor/s.
All fixings between Daray lights and the building super-structure must be approved
by either the chief project engineer or an appropriate and competent structural
assessor.
The components supplied by Daray for fitting / installation should be the following
items in the specified quantities.
EXCELC / EXCELCS
Qty.
EXCELW / EXCELWS
Qty.
Ceiling Mount Plate
1
Wall Mount Bracket
1
1m (2m optional) Downtube
1
Rotation and suspension arm system
1
Rotation and suspension arm system
1
Lighthead
1
Suspended Ceiling Cover
1
Wall mounted power supply
1
Lighthead
1
Microfibre cloth
1
Ceiling Mount Cover (Optional)
1
User Manual
1
Microfibre cloth
1
User Manual
1
EXCELDFM
Qty.
EXCELU
Qty.
Footplate
1
Floor mount upstand
1
Upstand (6ft)
1
Rotation and suspension arm system
1
Rotation and suspension arm system
1
Lighthead
1
Lighthead
1
Toroidal Transformer / PSU
1
Toroidal Transformer / PSU
1
Microfibre cloth
1
Microfibre cloth
1
User Manual
1
User Manual
1
To use the ceiling mounted edition of this light for fixing points over 2.9m, you will
require Daray’s 2m downtube or a customised length.

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1.4 Technical Drawings

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2. Technical Specifications
Light Source
LED
Light Intensity (Lux) @ 0.7m
35,000 Lux ±5%
Light Intensity Adjustment Range
5% - 100%
Colour Temperature (Kelvin)
6,950K ±5%
Colour Rendering Index (CRI)
95
Colour Rendering (R9)
88
Light Field Diameter
@ 0.7m: 150mm x 70mm ±20mm
Number of LED’s
6
Power Consumption
8-12W ±2%
Average Working Life
>50,000 hours
Input Voltage
100 –240V AC 50/60Hz
Output Voltage
12V AC ±2%
Temperature Rise on Patient/User
≤2˚C
Warranty Period
3 Years
NHS E-Class Code
FBU, FKR
Commodity Code
9018 908400
GMDN Code
12276

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3. Operation
3.1 Pre-Start Checks
Please check (when applicable) that the head and arms are without visible
damage, and all LED’s are present and working in the head.
NOTE: the light may take a few seconds to power on fully and
illuminate, please be patient when first turning on the light.
CAUTION: Users should not look directly into the light as it is bright and will
illuminate when powering on.
3.2 Motion Sensor Operation
The EXCEL has two switch systems that can be used to power the light on or off –a
motion sensor and a manual switch.
The motion sensor is an infrared relay located underneath the lighthead fascia.
You can operate the light by passing your hand in front of the sensor. The infrared
proximity switch is located under the lighthead. The control range for this is
approximately 100mm.
- Pass hand in front of the sensor (either direction) once to turn the light ON or OFF
- Place hand in front of the sensor and hold to increase or decrease intensity
There is an audible beep from the unit when the light reaches one of its variable
intensity peaks (highest and lowest).

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3.3 Manual Switch Operation
The manual switch is located on the underside of the stirrup.
- Flick once to turn the light ON or OFF
- Push and hold the switch, to increase or decrease intensity
There is an audible beep from the unit when the light reaches one of its variable
intensity peaks (highest and lowest).
Note: The variable intensity control has a memory function; whereby, if the light
is turned off at a dimmed level, it will remember that level the next time it is
turned on.
Control switch
Sensor

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3.4 Handles
The Excel light has independent handles that can be attached to the lighthead in
multiple locations depending on user preference.
Note: The handles are removable for cleaning but are NOT suitable for
autoclaving
To remove the handle, hold it in one hand and press the lock button on the handle to
release the locking mechanism. Pull the handle away from the head carefully.
After use, turn off at the lighthead with the sensor or switch. Where applicable, also
turn off the light at the power-supply via the wall mounted module or switched fused
spur.

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4. Installation Guide Section

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4.1 Ceiling Mounted Version (EXCELC)
4.1.1 Considerations
The procedures below are detailed to a high level however If in doubt
please consult a qualified electrician.
Minimum Room
Requirements
The ceiling mounted version of the EXCEL has a
recommended install height where the bottom of the wall
bracket is approximately 1900mm from the floor.
When cutting the downtube to the required height you will
need to account for the ceiling plate clamp and leave a gap
between the plate and the ceiling for the cable flow.
Maximum Room
Requirements
The maximum fixing height available with a 1m downtube is
approximately 2900mm from the floor. For ceiling heights
above this a 2m downtube may be required.
For lights being installed into suspended ceiling area’s a uni-
strut platform can be used to bring the fixing point down.
Live Electric
Circuitry
All personnel working around live circuitry should be qualified
and following proper procedures
Heavy or Difficult
fittings
Fitting the ceiling plate can be difficult and aspects of the
fitting may require more than one person; this work should
only be attempted by appropriate and competent personnel.
Existing
Environmental
Factors
When fitting, considerations have to be taken for existing
services such as; fire alarms, vents, lights, etc. along with
interior ceiling construction and any surrounding hazard.
Environmental
Responsibility
Once our products are installed all packaging should be
disposed of appropriately and recycled where appropriate
and in accordance with local governing regulations.

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These instructions are based on the assumption of a fresh fit into a room with no
previous lighting structures. With installations onto sites with equipment already in
place, we recommend that the previous lights’ mounting plate be removed and the
new one fitted as if into a fresh fitting.
After concluding the structural stability of the ceiling structure it will be necessary
to assess the construct and decide on the best course of action for installing the
ceiling plate. There are various different methods for fixing the plate onto the
ceiling, below are a few example methods that can be used.
4.1.2 Attachment methods and void suspension
Please note, the minimum room height allowed for fixing requires the bottom of the
ceiling plate to be no lower than 2290mm.
Bolted Directly into the structure and secured with chemical bonding
The is our primary choice for mounting our lights to the ceiling structure,
appropriate rawl bolts and chemical bonding should be used to secure the fitting.
Bolted to a Uni-strut Construct
When using a uni-strut construct for mounting the ceiling plate, you should ensure
that the uni-strut is cross braced to ensure it is secure and does not move.
Weight dispersed over several timber frames
Timber framing can be used for attaching ceiling mounted units. The framing should
be assessed by a competent structural engineer to ensure suitability; appropriate
fixings should also be used.
Another option available would be attaching the ceiling plate to uni-strut that has
been used to sandwich multiple timber rafters there-by spreading the weight of the
unit across an enlarged area.

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4.1.3 Lighting configuration
Dependant on the choice of attachment method, and whether the light is being
attached in a void or directly onto an open surface ceiling; custom mounting aspects
may be required.
Daray’s standard mounting recommendation is to have the ceiling plate fixed directly
into the ceiling structure whenever possible. This would also be suitable for open
surface, non-voided areas with the use of an optional ceiling mount cover.
Ultimately the mounting method used is the responsibility of the project engineer or
fitter. This includes the specification of attachment hardware, lateral bracing and
the suitability of the surface to be fixed to.
4.1.4 Affixing the Ceiling plate
The location of the light should be decided by the end user / project manager or
through schematical drawings.
Once the location has been decided it will be necessary to first mark the location of
the fixing points. This can be done by placing the ceiling plate in position and using
the holes in the plate as a template, mark the locations of the fixing points on the
fixing structure.
* Picture for illustration purposes only.
Remove the plate, now drill holes relevant to the structure and fixing bolts used.
Please use appropriate fixings when securing the plate to the ceiling.
Once the plate has been fitted, it will be necessary to ensure that it is balanced on
the horizontal plane. This can be achieved by adjusting the three large bolts. After
any adjustment it will be necessary to check that all fixings are still sound and that
locking nuts are tight.
Fixing Points

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4.1.5 Downtube adjustment and installation
The downtube provided will be either 1m as standard or 2m (optional) maximum with
a boot on the bottom. It is Daray’s recommendation that the bottom of the
downtube is approximately 1900mm from the floor once installed.
Measure the distance from the ceiling plate to where the bottom of the downtube
will sit. Mark and cut the downtube. When cutting the downtube to length it is highly
recommended that you push the wire back inside the downtube so that you don’t cut
through it. The downtube should be cut to length on site to suit the particular
ceiling height and application.
Once the downtube has been cut to length it will be necessary to de-burr
the end of the tube, as this can help prevent damage to the cable.
Note, when installed the downtube must leave clearance above the
ceiling mount plate to prevent the cable being trapped.
Loosen the clamp on the top of the ceiling plate and remove the safety bolt. Insert
the downtube and adjust the boot of the downtube to be facing the examination
area.
Note: For suspended ceilings, there is a small suspended ceiling trim and rubber
retaining band included. For units being installed into an open ceiling there is a full
size ceiling mount cover available as an optional extra from Daray.
NOTE: For suspended ceilings cut a clearance hole in a ceiling tile and slide this over
the top of the downtube and suspended ceiling trim before attaching to downtube to
the ceiling plate.
Clamp Bolts
Safety bolt
Nylon Locknut

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Rubber Retainer
Ring
Ceiling Mount Cover
Suspended Ceiling
trim
Now you should put the rubber retainer ring onto the downtube followed by either
the ceiling trim or ceiling mount cover. This is to allow the covers to be fixed into
position after you have attached the downtube to the ceiling plate.
Thread the wire back up through the downtube and feed it up through the middle of
the ceiling plate; then place the downtube loosely between the clamps on the ceiling
plate.
Next you will need to drill the safety bolt hole. Before drilling, please direct the boot
on the bottom the downtube toward the centre of the examination area to allow the
best range of motion over the examination area.
With the downtube directed, use the two holes in the metal clamps to mark the
location where the safety bolt will go through. Remove the downtube and secure for
drilling. A 6mm hole should be drilled through the downtube on both sides to allow
the bolt to pass through.
Re-insert the downtube into the ceiling plate, insert the safety bolt through the
clamps and the downtube (being careful not to catch the wire). Then tighten the
clamps and the safety bolt / nylon locknut.
NOTE: TO ENSURE THE USER'S SAFETY, THE SAFETY BOLT AND NYLON
INSERT LOCK NUT MUST BE FITTED PROPERLY
It will be necessary to ensure that the downtube is absolutely vertical to prevent arm
drift. This can be achieved by adjusting the three securing points on the plate, once
adjusted, use the locking nut secure the adjustments. After any adjustment it will be
necessary to check that all fixings are still sound and that locking nuts are tight.
Locking Nut
Adjusting Bolt

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Mains Power
should be
inserted here
Fuse Holder around the front
- 3 Amp Fuse –D15998
4.1.6 Wiring and transformer layout
Before working on electrical connections please make sure that the
power to the light is switched off at the source and secured so that it
will not be turned on during your work.
Ideally the cable used to power the light should be of a 1.5mm twin and earth type.
Daray recommends that the power supplied uses an earthed switched fused spur,
protected with a 3amp fuse.
The above wiring is for modern wiring applications (post 2000). The cable from the
downtube will have a Molex connection on the end. This will attach to the opposite
Molex connection from the transformer.
To connect the cabling from the transformer into the main power you will need to
run this connection into the switched fused terminal point above. With the
connection secured you can now move the relevant cover up the downtube.
NOTE: For suspended ceilings, slide the previously cut tile back into place first,
then slide the trim up the downtube until it is firmly against ceiling tile, then roll the
trim retaining band upward until it holds the trim in position
NOTE: For conventional ceilings fit the cover, holding it in place with the retaining
band from the fitting kit.
The wiring should be as follows:
Live terminal brown wire.
Neutral terminal blue wire.
Earth terminal green/yellow wire.

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4.1.7 Arm installation
To ensure the smooth rotation of the arm, it is essential
that the primary arm spigot is lightly lubricated before
being inserted into the boot of the downtube.
Place the white nylon washer over the primary arm
spigot. Using the sachet of silicon grease provided,
lubricate the indicated sections of the arm spigot.
Whilst inserting the arm spigot into the downtube boot,
feed the cable connection through the bottom of the
boot.
Join the connector from the arm system to the
connector from the downtube.
Then sit the connection inside one of the supplied bungs and insert the bung into the
bottom of the downtube.
Lubricate