Nuvo 909473_1003385-rev.-c-system-two-led-manual-ms System Two Surgical Lighting System Installation and Service Manual

INSTALLATION AND

SERVICE MANUAL

System Two LED

Agency Approvals

Medical Electrical Equipment

With respect to electric shock, fire

And mechanical hazards only

In accordance with IEC60601-1:2006/CAN/CSA C22.2

No.601.1-M90 with updates 1 & 2

Classifications:

1. Protection against electrical shock (5.1, 5.2). Class I permanently connected,

2. Protection against harmful ingress of water (5.3). None.

3. Degree of safety in the presence of flammable anesthetics or oxygen (5.5). Not suitable for use in the
presence of flammable anesthetics or oxygen.

4. Mode of operation (5.6). Continuous

5. Surgical luminaries (IEC60601-2-41)

Electromagnetic compatibility for immunity

And emissions in accordance with

IEC/EN 60601-1-2:2007 edition 3.0 (with 1:2008+A2:2009) and

CISPR 11 Class A

Medical Electrical Equipment

Particular requirements for the safety of surgical

luminaries and luminaries for diagnosis

In accordance with IEC-60601-2-41

Intended use: Professional Medical Lighting for Hospital, Clinic, Minor Surgery, Examination or Diagnosis, within
suitable facilities designated for such purposes. This light system is mounted centrally in a room such that access is
available all around the operating environment.

User interface: The System Two LED lighting systems are intended to be used by medical professionals in
surgeries and exam rooms. The functional interfaces are 360° positioning horizontally and vertically +15° to -65°.
The light head can be rotated continuously. An ON/OFF button is provided with 5 levels of dimming and Endo
mode.

Misuses: For any purpose or use at any facility other than stated above. Caution shall be exercised when
positioning the light head and avoid contact or collision with the patent, other medical professionals or other
lights/equipment.

Cautions: Do not apply excessive force to motion range stop features.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 2

Versions

Height adjustment

Brakes

System Two LED Installation and Service Manual (1003385 Rev. C) Page 3

Parts and control elements

The schematic representation on page 3 illustrates the System
Two central axis S1, S2 and S3 versions as examples. The
parts and control elements of the System Two central axis C1
and C2 versions (not illustrated) are identical.

[1] Ceiling Cover

There are two Covers available. The Standard Ceiling
Cover is sufficient in most basic installations. The large
Ceiling Cover should be used when needed to cover a
larger area.

[2] Ceiling tube

Variable lengths for compensating different ceiling
heights

[3] Rotating canopy

For System Two LED central axis S2 and S3 versions
only

[4] Extension Arm

Different lengths depending on the version

[5] Spring Arm

Different configurations (ie: Standard or Flat Cardanic for
Light Head/Yoke assembly or & Monitor Cradle)

System Two LED Installation and Service Manual (1003385 Rev. C) Page 4

Thank you

Visit us on the Internet

E-mail Address

Thank you for purchasing this Medical Illumination product.
Please read these Operating Instructions very carefully, abide
by the safety notices and observe all operating and cleaning
requirements.

These Operating Instructions apply to;

System Two LED Surgical Light and Central Axis S1
System Two LED Surgical Light and Central Axis S2
System Two LED Surgical Light and Central Axis S3

Please do not hesitate to contact our Customer Service
team

if you have any questions about the appliance and its
installation, and also in service or warranty cases.

Manufacturer and distributor

Medical Illumination International
547 Library St
San Fernando, CA 91340
[phone]

www.medillum.com
[e-mail]

Supplier’s address

Space for supplier’s stamp or label

System Two LED Installation and Service Manual (1003385 Rev. C) Page 5

Notes on these Operating Instructions

Copyright

Modifications to the appliance

Modifications to the Operating Instructions

Translations

Notes on copyright and property rights

 All rights reserved. These Operating Instructions are

protected by copyright law.

 Any other use than that regulated by law must be approved

in writing by Medical Illumination International, hereinafter
referred to as MI.

 MI does not take any liability for or in relation to the misuse

of this information in the prohibited manner by any person or
company.

Modifications and translations

 MI products are subject to continuous further development.

MI reserves the right to modify the form, equipment and
technology of the scope of supply without prior notice.

 The contents of these Operating Instructions are subject to

change without prior notice.

 In case of translations into foreign languages, the English

version of these Operating Instructions shall take
precedence

Trademarks

 All trademarks mentioned in these Operating Instructions

are the sole and exclusive property of the corresponding
manufacturer.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 6

Table of Contents

Section 1: General Information............................................................................................................................... 9

Important Information for Safe Use ........................................................................................................................ 9

Definition of Terms ............................................................................................................................................... 12

List of Symbols ..................................................................................................................................................... 13

Limited Warranty .................................................................................................................................................. 14

Section 2: Product Specifications ........................................................................................................................ 15

Section 3: Pre-Installation Guidelines ................................................................................................................. 17

Mounting Plate preparation with an Interface Plate ............................................................................................. 18

Ceiling Structure Construction and Mounting....................................................................................................... 19

Ceiling Cover ........................................................................................................................................................ 19

Power Box ............................................................................................................................................................ 20

Ceiling Rod Calculation, Single Mount ................................................................................................................. 21

Ceiling Rod Calculation, Dual Mount ................................................................................................................... 22

Ceiling Rod Calculation, Triple Mount .................................................................................................................. 23

Ceiling Rod Calculation, Single LCH Mount......................................................................................................... 24

Ceiling Rod Calculation, Dual LCH Mount ........................................................................................................... 25

Ceiling Rod Calculation, Triple LCH Mount.......................................................................................................... 26

Section 4: Installing the Light System ................................................................................................................. 27

Installing the Central Axis ..................................................................................................................................... 27

Mounting the Extension Arm set to the Ceiling Tube ........................................................................................... 28

Mounting the Rotating Canopy ............................................................................................................................. 29

Mounting the L17 and LCH Spring Arm ............................................................................................................... 30

Mounting the MD21/MD21+ Spring Arm .............................................................................................................. 31

Preparing the MD21 Spring Arm .......................................................................................................................... 33

Preparing the L17 Spring Arm .............................................................................................................................. 35

Mounting the Light Head to L17 Spring Arm ........................................................................................................ 36

Preparing the LCH Spring Arm ............................................................................................................................ 37

Mounting the Light Head to LCH Spring Arm ....................................................................................................... 38

Positioning the Light ............................................................................................................................................. 39

Section 5: Adjustments ......................................................................................................................................... 40

Adjusting the Brakes for the Extension Arm ......................................................................................................... 40

Adjusting the Brakes for the Spring Arm .............................................................................................................. 43

Adjusting the Comfort Stop on the Extension Arm ............................................................................................... 45

L21/MD21 Spring Arm .......................................................................................................................................... 47

Adjusting the Spring Tension ............................................................................................................................... 48

Adjusting the Vertical Lift ...................................................................................................................................... 49

Adjusting the Optional Brake ................................................................................................................................ 50

Adjusting the Yoke Brake ..................................................................................................................................... 53

Installation and Removal for the Sterilizable Handle Assembly (Camera Lights only) ........................................ 54

Installation and Removal for the HD Camera Assembly (Camera Lights only) ................................................... 55

Section 6: General Maintenance .......................................................................................................................... 56

General Safety ..................................................................................................................................................... 56

Disinfection ........................................................................................................................................................... 57

Handle Sterilization and Cleaning ........................................................................................................................ 58

Maintenance ......................................................................................................................................................... 59

Mounting the securing segments ......................................................................................................................... 61

Checking the securing segment on the Spring Arm - L21/MD21 ......................................................................... 62

Dismantling and re-mounting the securing segment ............................................................................................ 63

Securing segment on the Spring Arm - LCH17 .................................................................................................... 64

Dismantling and re-mounting the securing segment Spring Arm - LCH17 .......................................................... 65

Checking the fixing screws on the Spring Arm - LCH17 ...................................................................................... 66

Lubricating the brake screws ............................................................................................................................... 67

System Two LED Installation and Service Manual (1003385 Rev. C) Page 7

Table of Illustrations

Figure 1: Ceiling Plate preparation with an Interface Plate ..................................................................................... 18

Figure 2: Recommended Ceiling Structure Construction ........................................................................................ 19

Figure 3: The Power Box ......................................................................................................................................... 20

Figure 4: Installing the Central Axis on a 65mm Down Tube .................................................................................. 27

Figure 5: Installing the Central Axis on a 110mm Down Tube ................................................................................ 27

Figure 6: Mounting the Extension Arm set to the Ceiling Tube ............................................................................... 28

Figure 7: Mounting the Rotating Canopy ................................................................................................................. 29

Figure 8: Mounting the L17 and LCH Spring Arms .................................................................................................. 30

Figure 9: Mounting the MD21/MD21+...................................................................................................................... 31

Figure 10: Mounting external cables ........................................................................................................................ 33

Figure 11: Preparing the L17 Spring Arm ................................................................................................................ 35

Figure 12: Mounting the Light Head ........................................................................................................................ 36

Figure 13: Preparing the LCH Spring Arm ............................................................................................................... 37

Figure 14: Mounting the Light Head to an LCH Arm ............................................................................................... 38

Figure 15: Positioning the Arms ............................................................................................................................... 39

Figure 16: Dismantling the right-hand cover panels from the Extension Arm ......................................................... 40

Figure 17: Dismantling the left-hand cover panel from the Extension Arm ............................................................. 40

Figure 18: Adjusting the Extension Arm brakes....................................................................................................... 41

Figure 19: Mounting the right-hand cover panel to the Extension Arm ................................................................... 42

Figure 20: Mounting the left-hand cover panel to the Extension Arm ..................................................................... 42

Figure 21: Dismantling the decorative caps and socket covers .............................................................................. 43

Figure 22: Adjusting the brakes ............................................................................................................................... 43

Figure 23: Mounting the socket covers and decorative caps to the Extension Arms .............................................. 44

Figure 24: Adjusting the Comfort Stop end stop on the Extension Arm .................................................................. 45

Figure 25: Spring Arm L21/MD21 ............................................................................................................................ 47

Figure 26: Adjusting the spring tension ................................................................................................................... 48

Figure 27: Adjusting the vertical lift .......................................................................................................................... 49

Figure 28: Adjusting the optional brake ................................................................................................................... 50

Figure 29: Adjusting the vertical lift .......................................................................................................................... 51

Figure 30: Adjusting the optional brake ................................................................................................................... 52

Figure 31: Yoke Rotational Brake - Double Yoke .................................................................................................... 53

Figure 32: Attaching the Sterilizable Handle ............................................................................................................ 54

Figure 33: Camera Assembly (D2C only) ................................................................................................................ 55

Figure 34: Inserting Camera Assembly (D2C only) ................................................................................................. 55

Figure 35: Handle Sterilization ................................................................................................................................. 58

Figure 36: Dismantling the decorative caps and socket covers from the Extension Arm ....................................... 60

Figure 37: Dismantling the securing segment ......................................................................................................... 60

Figure 38: Mounting the securing segment ............................................................................................................. 61

Figure 39: Mounting the socket covers and decorative caps to the Extension Arm ................................................ 61

Figure 40: Adjusting the L17/MD21 Spring Arm ...................................................................................................... 62

Figure 41: Checking the securing segment ............................................................................................................. 63

Figure 42: Adjusting the LCH17 Spring Arm ............................................................................................................ 64

Figure 43: Checking the securing segment ............................................................................................................. 65

Figure 44: Checking the fixing screws on the Spring Arm LCH17........................................................................... 66

Figure 45: Checking the securing ring on the bottom Extension Arm towards the spindle ..................................... 66

System Two LED Installation and Service Manual (1003385 Rev. C) Page 8

Section 1: General Information
Important Information for Safe Use

Section 1

Important Information for Safe Use

 These Operating Instructions are intended solely for devices

with the manufacturer's rating plate bearing the following

information:
– Type designation: S1, S2 and S3
 This identification is binding for the validity of the Operating

Instructions and must not be removed, regardless of the

type of publication (printed form, electronic form or

excerpts).

Identification of target groups

The groups of persons described below are mentioned in
these Operating Instructions.

Operator

The following natural persons or legal entities shall be
considered as operators:
 All persons who use the appliance in a medical practice,

hospital, etc. or hand over the appliance to third parties for

use/application, and who have actual physical authority over

the appliance during operation.
 The operator shall be liable for handing over a safe

appliance and for instructing the user in the proper operation

and normal use of the appliance.

User

The following persons shall be considered as users:
 Persons who, due to their professional qualification and

instruction by the persons designated by the operator, are

authorized to operate the appliance and to work with it.
 Users shall be fully responsible for the safe operation of the

appliance in accordance with its intended purpose.

Qualified personnel

The following persons shall be considered as qualified
personnel:
 Persons who underwent special professional training in the

field of medicine or medical engineering,
 Persons who can assess their work and recognize the

potential hazards involved on the basis of their professional

experience and instruction in safety-relevant regulations.
 In States where the performance of tasks in the medical or

medical engineering sector is subject to certification,

qualified personnel must have obtained the corresponding

certificate.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 9

Important Information for Safe Use (cont)

Instruction

Duty to inform and inspect

Troubleshooting

Section 1

Notes for the user

 All the steps described in these Operating Instructions may

only be carried out by qualified personnel who have been

authorized and instructed by the operator.

Instruction on the appliance

 The instruction must be carried out on the appliance

immediately by Medical Illumination personnel, by a

company authorized by Medical Illumination or by a person

designated by the operator.
 On completion of the instruction, a certificate must be

created and signed in order to document that the user has

understood the special operator control actions required for

normal use.

User's duty to inform and inspect

 Read these Operating Instructions carefully prior to

installation of the appliance. This ensures that you benefit

from all the advantages of the appliance and prevents any

risk of injury or damage.
 Prior to any use or transfer for use, the functional reliability

and proper condition of the appliance must be inspected by

the user.
 In case of special problems which are not sufficiently

described in detail in these Operating Instructions, contact

your supplier for your own safety.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 10

Important Information for Safe Use

Section 1

Important Information for Safe Use

Qualified personnel

 The system is suitable for continuous operation.
 The system may only be operated by instructed, qualified

medical personnel.
 The system may only be cleaned and disinfected by

instructed hygiene specialists.
 Maintenance work on the system must be carried out by the

operator's technical specialist personnel in accordance with

the applicable instruction document.
Incorrect use

 The maximum load bearing capacity of the system and its

components as specified in Section 5, “Maximum Load”

must not be exceeded.

Contraindications

 The system must not be used close to strong magnetic

fields.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 11

Definition of Terms

Medical Electrical Equipment

Central Illuminance

Light Field Center

Light Field Diameter

Depth of Illumination

Shadow Dilution

Correlated Color Temperature

Total Irradiance

Color Rendering Index (CRI)

Sterilizable Handle

Head/Yoke Assembly

Arm Assembly – Extension/Articulating

Light Mounting

Neutral Conductor (common)

Protective earth ground

Off Center Moment

I.E.C.

ETL

Arm

Section 1

International Electrotechnical Commission
Edison Testing Laboratories
Electrical equipment intended to diagnose, treat the patient

under medical supervision.
Illuminance of light head measured at 1 meter from the light

emitting area with no obstructions. The value is expressed in
Foot-candles or Lux.

The point of maximum Illuminance in the lighted area. This is
the reference point for light field size and light distribution
measurements.

The diameter of the circle where Illuminance reaches 10% of
light field center Illuminance.

The distance above and below 1 meter to where the central
Illuminance is reduced to 20%.

The ability of the equipment to minimize the impact of
shadows in the working area due to partial obstruction by the
operator or other medical personnel.

The color temperature of the light fixture when compared to a
blackbody radiator expressed in degrees Kelvin.

The total amount of energy imparted to the patient by the
lighting system expressed in Watts/meter squared.

A method of how well a light source will render other colors
when illuminating them based upon eight CIE chromaticity
coordinates measured with a SpectroRadiometer.

An easily removable device that when properly sterilized
maintains a sterile area in order to handle it under aseptic
conditions when attached to the equipment.

The part of the system which includes the light source, heat
removal system and light focusing system.

The Horizontal section of the positioning arm with pivots that
increase the area covered by the light head and articulating
arm. The articulating arm allows for vertical positioning of the
light head.

Support apparatus used to connect arm assembly/light head
to a fixed surface, consisting of either a single, double or triple
ceiling mount.

In an AC circuit, the return line for current.
The conductor used to connect the non-current-carrying metal

parts of equipment, raceways, and other enclosures to the
system grounded conductor, the grounding electrode
conductor, or both, of the circuit at the service equipment or at
the source of a separately derived system.

The unit of measurement used for torque which is caused by
an off-center load. This is measured in foot-pounds.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 12

List of Symbols

Section 1

ETL Listing marking

Read accompanying documents

CE Marking

Fuse marking

Protective earth ground

Neutral conductor

Caution

Electric shock hazard

Separate collection for electric and electronic equipment.
Do not dispose of as household waste.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 13

Section 1

Medical Illumination International, Inc.

Limited Warranty

This document comprises the general terms of your product’s Limited Warranty. This Limited Warranty is applicable

to products sold by Medical Illumination International, Inc. or one of its subsidiaries or divisions (collectively, “MI”)
through one of MI’s authorized dealers, distributors or sales representatives (an “authorized Dealer”). This Limited

Warranty is not applicable to any MI product not purchased from an Authorized Dealer.
Your product is warranted against defective material and/or workmanship, excluding normal replacement parts, for

a period of three (3) years from the date of shipment. Normal replacement parts include, but are not limited to,
bulbs, sterilizable handles, filters and glass items. This Limited Warranty applies exclusively to the repair or
replacement of parts recognized as defective by MI that are in normal use and have not been modified or repaired
by unauthorized personnel.

This Limited Warranty is in lieu of all other warranties, expressed or implied, including any implied
warranty of fitness for a particular purpose and all other obligations or liabilities, including liability for
incidental, special or consequential damages or labor.

In the event of a defect or failure covered under this Limited Warranty, please contact MI immediately by phone
(818/838-3025), fax [phone]), email ([e-mail]) or through our website (http://www.medillum.com).
Be prepared to give the model number, serial number and full description of the issue. This Limited Warranty will
not apply if the MI serial number affixed to the product has been removed, altered or defaced.

Our CS department will attempt to solve the problem over the phone. If it becomes necessary, we will determine, in
our sole discretion, the best way to address the issue. We may require that the product be sent to out factory for
repair. In limited instances, we may dispatch an authorized service technicians. No product serviced by other than
our authorized service technicians will be covered by this Limited Warranty.
In the event we determine that your product needs to be returned to our factory, please do not continue to use your
product. MI is not responsible for any costs, expenses, losses or damage resulting from your continued use of the
product prior to its authorized repair. MI is not responsible for costs or expenses incurred for loss of use of the
product.

If we require the return of the product to our factory, you will be provided with a Return Authorization number.
Products sent to the factory without a Return Authorization number will not be accepted. It is your obligation to
arrange for return shipment of your product to the factory for warranty service, which shall be at your expense. Your
Product must be returned to our factory within thirty (30) days of the date of the Return Authorization. Carefully
package the product and return it, freight prepaid and insured, with the Return Authorization number clearly marked
on the outside of the box, to Medical Illumination International, Inc., 547 Library Street, San Fernando, CA 91340,
RA#______________.

Damage resulting from inadequate packing is not covered by this warranty, and shipping insurance does not cover
damage due to inadequate packing. MI cannot be held responsible for in-transit loss or damage. In the event that
freight-related damage should occur, we will notify you immediately so that you can file a claim with the freight
carrier.

Within the warranty period, MI will evaluate your returned product, repair as appropriate, and ship the product back
to you with freight cost prepaid by MI. In the event that damage or failure is discovered that is not covered by this
Limited Warranty, we will contact you for your approval of all costs that may be incurred prior to commencing any
repairs.

This Limited Warranty does not cover the following:

• Any field labor or outside services, including, but not limited to, electricians, contractors, installation
services, routine maintenance or other repair services.

• Damage to the product resulting from tampering, accident, abuse, negligence, alteration, or other causes
unrelated to problems with material and/or workmanship.

• Damage due to improper installation, use, cleaning or maintenance, as outlined in the Installation and
Service Manual for the product.

• Labor costs associated with removing, re-packaging for shipment or reinstalling product.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 14

Section 2: Product Specifications

Parameter

Value

Weights:

Ceiling Mounting Plate
Single Central Axis

Dual Central Axis
Triple Central Axis

Spring Arm – L21
Spring Arm – LCH
Spring Arm – MD21 (Monitor Spring Arm)

Light Head assembly
Power Box (Dual Light)

Approximately 7.2 lbs (3.3kg) to 58.2 lbs (26.5kg)
Approximately 20.9 lbs (9.5kg)

Approximately 38.3 lbs (17.4kg)
Approximately 54.3 lbs (24.7kg)

Approximately 16.1 lbs (7.3kg)
Approximately 14.3 lbs (6.5kg)
Approximately 16.5 lbs (7.5kg)

Approximately 28.1 lbs (12.8kg)
Approximately 8.8 lbs (4.0kg)

Dimensions:

Ceiling Mount Plate
Available Ceiling Rod lengths

Central Axis Extension Arm lengths - Single
Central Axis Extension Arm lengths - Dual
Central Axis Extension Arm lengths - Triple
Spring Arm length
Light head assembly

11.2” (290mm) Hex Mounting Plate
8” 16” 24” 32” 39” 47”

(200mm) (400mm) (600mm) (800mm) (1.0m) (1.2m)

41.3” (1,050mm)

41.3” (1,050mm) / 35.4” (900mm)

41.3” (1,050mm) / 35.4” (900mm) / 29.5” (750mm)

36.2” (920mm)

25.5” (648 mm) Dia. x 4.75” (120 mm) deep

Voltage
Input Voltage

100 - 240 VAC 50/60 Hz – Single Phase

LED life

50,000 hours (average)

Power:

Single
Dual
Triple

180 Watts
360 Watts
540 Watts

Mechanical Specifications

Section 2

Electrical Specifications

System Two LED Installation and Service Manual (1003385 Rev. C) Page 15

Section 2: Specifications

Correlated Color Temperature
D-Series
Vu-160
Vu-E
Irradiance
Color Rendering Index (CRI R1-R8=RA)
Color Rendering Index R9

Fixed at 4,300°K ±300°K
Fixed at 4,300°K ±300°K
Variable between 3,800°K to 4,800 K ±300°K
128 W/m2 (1 m)
95
95

Focal length
D-Series Central Illuminance (full intensity)
Dimming – 5 Intensity Levels
(Indicated by 5 LED’s on 2
indicator strips located 180° apart)

Vu-160/Vu-E Central Illuminance (full intensity)
Dimming – 5 Levels
(Indicated by 5 LED’s on 2
indicator strips located 180° apart)

Endo Mode

D-Series
Vu

Light field diameter (adjustable)
Depth of illumination
Diameter (d50)
Illuminance (one mask)
Illuminance (two masks)
Illuminance at bottom of standard tube
Illuminance at bottom of standard tube with one

mask

Illuminance at bottom of standard tube with two

masks

39.4” (1 meter)
130,000 ± 5K Lux.
100% 87.5% 75% 62.5% 50%
130,000 113,750 97,500 81,250 65,000

160,000 +0 / -10K LUX @4,300°K
100% 87.5% 75% 62.5% 50%
160,000 140,000 120,000 100,000 80,000
LUX LUX LUX LUX LUX

10% - 12 white LED’s triangulated 120° apart (8,500 LUX)

7.4% - 6 green LED’s located 60° apart @4300°K

9.5” – 14” (229mm – 356mm)

32.3” (820mm)

5.5” (127mm – 140mm)

74,560 Lux (6,930 fc)
62,408 Lux (5,800 fc)
132,300 Lux (12,300 fc)
72,630 Lux (6,750 fc)

60,256 Lux (5,600 fc)
Ambient/Operating temperature

41F to 104F (-10C to 40°C)

Storage temperature range

-4F to 122F (-20C to 50°C)

Humidity

10% - 75% Relative Humidity

Pressure

500 hPA to 1,060hPA (@<2K meters)

Optical Specifications

Section 2

Environmental Specifications

System Two LED Installation and Service Manual (1003385 Rev. C) Page 16

Section 3

Section 3: Pre-Installation Guidelines

SPECIAL NOTE: Installation and repair of this equipment should be performed by a qualified mechanical
contractor only. Medical Illumination does not warranty any damage occurring as a result of improper
installation.

It is recommended that this installation manual be completely reviewed prior to installation.
Before installation, check to ensure the following minimum conditions are provided:

 The structural ceiling mount is designed to support a vertical load of 300 lbs (triple) and an off-center moment

of 960 ft-lbs, the single light is significantly less. The structural mount should meet all local building codes.

A structural mount that does not meet these minimum conditions can cause serious injury and/or

property damage.

Failure to use the correct mounting hardware can cause the arm/head assembly to become

unstable, causing serious injury and/or property damage. If the ceiling mounting surface is not level, shim the

ceiling casting to level the assembly.

Failure to level the ceiling plate may cause unwanted arm “drifting” during use.

 It is recommended that the Power Box be mounted directly over a 4-0 junction box. If this is not possible the

input power supply lines should be wired in accordance with all applicable building codes.

 The supply circuit line must be as follows:

120 VAC lights-110-120 VAC 50/60 Hz, single phase, three wire, capable of supplying 700 watts @ 6.4
amperes.

230 VAC lights- 220-240 VAC, 50/60 Hz, single phase, three wire, capable of supplying 700 watts @ 3.2
amperes.

 The power supply circuit must be in compliance with all applicable building codes.

 It is recommended that the Lighting System is connected to its own supply circuit with integral circuit breaker.

The circuit breaker will act as the supply main disconnect switch.

 The MAINS ground wire, which is green and has a ring-type terminal at the end, should be securely fastened to

the mounting plate with a screw and lock washer.

Failure to provide a circuit meeting these minimum standards or complying with local building

codes can cause a shock hazard.

 Check the length of the ceiling rod supplied to make sure that it is the proper length to install and operate the

light without interference or over reach. See the Ceiling Rod Calculations.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 17

Section 3

Mounting Plate preparation with an Interface Plate

If you choose to an Interface Plate in mounting your Light System, you should only use 5/8-11, A325 High Strength
Threaded Rods, Hex Nuts and Washers. The following will illustrate the recommended hardware complement.

Figure 1: Ceiling Plate preparation with an Interface Plate

System Two LED Installation and Service Manual (1003385 Rev. C) Page 18

Section 3

Ceiling Structure Construction and Mounting

The Ceiling Mount system will experience various levels of dynamic off center moment during regular use.
Therefore, it is crucial that the ceiling structure be strong enough to uphold the weight of the system and support
the positioning arms and light head without deflection. The owner and/or owner’s contractor has the final
responsibility for the strength and rigidity of the ceiling structure. An inadequate ceiling structure may result in
serious injury, unintended drift, and/or equipment damage. Because the ceiling structure is the owner’s

responsibility, the design and construction recommendation shown below covers only one of the many
possible alternatives that can be used. Medical Illumination highly recommends that the owner consult a

structural engineer prior to designing and installing the ceiling structure.

Recommended Ceiling Structure Construction Details

The illustrations below are suggested mounting schemes per 2001 California Building Code – Section 1632A:
Anchorage and Seismic. For any other mounting scheme, please consult a structural engineer and/or professional
contractor for the best solution for your situation. Installation and repair of this equipment should be performed by
qualified persons only. Medical Illumination does not warranty any damage occurring as a result of improper
installation.

Figure 2: Recommended Ceiling Structure Construction

Ceiling Cover

The Standard Ceiling Cover is included with the system and can be used in most installations. If the finished ceiling
level is above the mounting plate, or there is a larger ceiling opening, a larger Ceiling Cover is available.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 19

Section 3

Power Box

The System Two LED Power Box supplies the power necessary to illuminate the System Two LED surgical light
systems. Remove the four screws on the top cover and lift cover off to make connections or change a fuse.

Figure 3: The Power Box

System Two LED Installation and Service Manual (1003385 Rev. C) Page 20

Ceiling Rod Calculation, Single Mount

Ceiling Mounting

Height

“Y”-Value

Ceiling Rod

Length

“X"-Value

Head Room to

Bottom of Extension

Arm

“Y”-Value – X-Value

9'0”/108”

8”

19”

89”

9'6"/114”

16"

27”

87”

10'0”/120”

24"

35”

85”

10'6"/126”

32"

43”

83”

11'0”/132”

39"

50”

82”

12'0”/144”

47"

58”

86”

Use the following table to select the correct length ceiling rod for your application

Section 3

System Two LED Installation and Service Manual (1003385 Rev. C) Page 21

Ceiling Rod Calculation, Dual Mount

Ceiling Mounting

Height

“Y”-Value

Ceiling Rod

Length

“X"-Value

Head Room to

Bottom of Extension

Arm

“Y”-Value – X-Value

9'0”/108”

N/A

N/A

N/A

9'6"/114”

16"

32”

82”

10'0”/120”

16"

32”

88”

10'6"/126”

24"

40”

86”

11'0”/132”

32"

48”

84”

12'0”/144”

39"

56”

88”

12'0”/144”

47”

64”

80”

Use the following table to select the correct length ceiling rod for your application

Section 3

System Two LED Installation and Service Manual (1003385 Rev. C) Page 22

Ceiling Rod Calculation, Triple Mount

Ceiling Mounting

Height

“Y”-Value

Ceiling Rod

Length

“X"-Value

Head Room to

Bottom of Extension

Arm

“Y”-Value – X-Value

9'0”/108”

N/A

N/A

N/A

9'6"/114”

N/A

N/A

N/A

10'0”/120”

16"

41”

79”

10'6"/126”

24"

49”

77”

11'0”/132”

24"

49”

83”

12'0”/144”

32"

69”

75”

Use the following table to select the correct length ceiling rod for your application

Section 3

System Two LED Installation and Service Manual (1003385 Rev. C) Page 23

Ceiling Rod Calculation, Single LCH Mount

Ceiling Mounting

Height

“Y”-Value

Ceiling Rod

Length

“X"-Value

Head Room to

Bottom of Extension

Arm

“Y”-Value – X-Value

9'0”/108”

8”

19”

89”

9'6"/114”

16"

27”

87”

10'0”/120”

24"

35”

85”

10'6"/126”

32"

43”

83”

Use the following table to select the correct length ceiling rod for your application

Section 3

System Two LED Installation and Service Manual (1003385 Rev. C) Page 24

Ceiling Rod Calculation, Dual LCH Mount

Ceiling Mounting

Height

“Y”-Value

Ceiling Rod

Length

“X"-Value

Head Room to

Bottom of Extension

Arm

“Y”-Value – X-Value

9'0”/108”

8”

24”

84”

9'6"/114”

16"

32”

82”

10'0”/120”

24"

40”

80”

10'6"/126”

32"

48”

78”

Use the following table to select the correct length ceiling rod for your application

Section 3

System Two LED Installation and Service Manual (1003385 Rev. C) Page 25

Ceiling Rod Calculation, Triple LCH Mount

Ceiling Mounting

Height

“Y”-Value

Ceiling Rod

Length

“X"-Value

Head Room to

Bottom of Extension

Arm

“Y”-Value – X-Value

9'6"/114”

16"

41”

73”

10'0”/120”

16"

38”

82”

10'6"/126”

24"

45”

81”

Use the following table to select the correct length ceiling rod for your application

Section 3

System Two LED Installation and Service Manual (1003385 Rev. C) Page 26

Section 4

Section 4: Installing the Light System

Installing the Central Axis

Installing the Central Axis requires two people and
using an equipment lift is HIGHLY recommended.
See Section 3 for the Mounting Plate and Ceiling
Structure guidelines.

Once the support structure and Hex Plate/Down Tube
are securely installed and level, the Central Axis is
ready to be installed. Locate the Securing Segment,
Flat Head Screw and Allen Cap Screw and have ready.

NOTE: The DC Power Cables and Ground Cable
(not shown) coming out of the Central Axis must be
guided up through the Down Tube while lifting the
hub of the Central Axis up into the Down Tube.

Using an equipment lift position the Central Axis under
the bottom of the Down Tube. Carefully position the
Central Axis so that the hub aligns with the Down Tube.

Lift the Central Axis until the hub goes up into the Down
Tube until it lines up with the Securing Segment slot.
Insert a greased Securing Segment until it stops and
ensure that it is seated. The outer edge of the Securing
Segment must be inside the outer diameter of the
Down Tube.

Figure 4: Installing the Central Axis on a 65mm Down
Tube

Figure 5: Installing the Central Axis on a
110mm Down Tube

System Two LED Installation and Service Manual (1003385 Rev. C) Page 27

With the Securing Segment installed, insert the Flat
Head Screw into the top hole and then install the Allen
Cap into the lower hole. Slowly remove height from the
equipment lift and check the rotations. If the Central
Axis rotates smoothly and without binding, tighten the
Allen Cap and then tighten the Flat Head Screw.
Recheck the ease of rotation.

The tightness of the Flat Head Screw and the Allen
Cap should be incorporated into the equipment
Preventative Maintenance Program

Mounting with the 110mm Down Tube

Using an equipment lift position the Central Axis under
the bottom of the Down Tube. Carefully position the
Central Axis so that the hub aligns with the Down Tube.

Lift the Central Axis until the hub goes up into the Down
Tube. Continue lifting until the screw holes in the Down
Tube aligns with the thread holes. Insert the 8 socket
cap screws ensuring that the screws are seated and
sufficiently tight.

Rotate the Extension Arm(s) to ensure free and smooth
rotation.

The tightness of the Flat Head Screw and the Allen
Cap should be incorporated into the equipment
Preventative Maintenance Program

Mounting the Extension Arm set to the Ceiling Tube

Figure 6: Mounting the Extension Arm set to the Ceiling
Tube

The figure shows an illustration of a Central Axis
with 3 Extension Arms ⑥. The installation
procedure for other versions is identical.

1. Route the supply cable ① through the flange

2. Insert the supply cable for the upper Extension

• Provide a cable length of approx. 80cm for the

3. Remove the packaging from the Extension Arm

• Make sure you do not remove the lubricant

4. Before inserting the Extension Arm set [6] into

5. Insert the Extension Arm set ⑥ into the flange

• To do this, make sure you route the supply

The Extension Arm can drop of the fixing element have
not been properly tightened.

6. Screw in 8 countersink screws and tighten to

7. Check the horizontal alignment of the

• Place the digital level onto the uppermost

• Rotate the Extension Arm ⑥ 90° in various

• The deviation from the horizontal must not

• In case of deviations by more than 0.2° the

Section 4

with the Ceiling Tube ④ towards the mounting
plate.

Arm into the mounting aperture ② in the flange
with the Ceiling Tube ④ and route it towards
the mounting plate.

cable loop to be laid afterwards in the rotating
canopy.

set [6] pivot.
from the Extension Arm set ⑥ pivot.
the ceiling tube, rotate it in position such that

the holes for the 8 countersunk screws ③ in
the ceiling tube and Extension Arm align.

with ceiling tube ④ without using a great deal
of force and without twisting.

cables ①.

*** Warning ***

10Nm.
Extension Arm set ⑥.
Extension Arm set ⑥.
directions and check the horizontal alignment.
exceed ±0.2°.
Extension Arm ⑥ must be realigned as

described in step 7 above.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 28

Mounting the Rotating Canopy

Figure 7: Mounting the Rotating Canopy

The figure shows a simplified representation of the
ceiling tube without flange.

1. Lay 2 half rings for the rotating canopy ③ around
the flange with ceiling tube [4] (with the threaded
holes pointing inwards); screw in the 2 cylinder
screws ④ and tighten them such that the 2
rotating canopy half rings ③ can still move
manually.

2. Place 1 disc Ø4.3 ⑦ on each fillister head screw
⑥.

3. Place the first bottom rotating canopy half ⑤ onto
the rotating canopy disc ⑧ and screw it on using 2
fillister head screws ⑥ and the disc Ø4.3 ⑦.

4. Push the rotating canopy half rings ③ towards
their correct position and then insert the first, top
rotating canopy half ② into the bottom rotating
canopy half ⑤.

• Make sure you leave a gap of approximately 0.04”
(1mm) between the top and the bottom rotating
canopy half ⑤.

5. Screw the first, top rotating canopy half ② into the
rotating canopy half rings ③ using 2 fillister head
screws ①.

6. Lay the supply cable ⑧ in the rotating canopy
halves in a loop as illustrated in the Figure such
that the supply cable ⑧ is not exposed to tensile
stress when rotating the upper Extension Arm.

• Make sure that the supply cable ⑧ is not exposed
to tensile stress in the 2 end stop positions.

7. Please the second, bottom rotating canopy half (not
illustrated) onto the rotating canopy disc ⑨ and
screw it on using 2 fillister head screws.

8. Screw the second, top canopy half (not illustrated)
onto the rotating canopy disc ⑨ and screw it on
using 2 fillister head screws ①.

9. Connect the 4 rotating canopy halves with each
other using 4 PT screws ⑩.

10. Check that the canopy halves are securely in place.

• The rotating canopy halves must engage tightly
with each other without gaps.

• The locking mechanisms on the rotating canopy
halves must be undamaged and lock against each
other.

• Make sure that all the screws are tightened.

Section 4

System Two LED Installation and Service Manual (1003385 Rev. C) Page 29

Mounting the L17 and LCH Spring Arm

Section 4

Two people are required to mount the Spring Arm.
An equipment lift is highly recommended to avoid
injury in lifting the Spring Arm into place.

1. Pull the 2 latch pins ① upwards and route the 2
securing segments ② out of the Extension Arm
until they snap into place ⑤.

2. Insert the Spring Arm pivot ④ straight into the
Extension Arm up to the end stop without twisting.

 The plug couplings mounted inside the Extension

Arm and Spring Arm are connected during this
installation step.

3. Insert 2 securing segments ② into the Extension
Arm up to the end stop such that they snap into
place:

 The 2 securing segments ② must protrude into the

groove ③ on the Spring Arm pivot ④

 The 2 spring-actuated latch pins ① audibly click

into place.

*** Risk of the Light Head dropping ***

Figure 8: Mounting the L17 and LCH Spring Arms

If the 2 securing segments ② are not properly
mounted, there is a risk of the Spring Arm with the Light
Head dropping and causing serious injury. Check the 2
securing segments ② are securely in place:

 The Spring Arm must be inserted into the

Extension Arm up to the end stop.

 The 2 securing segments ② must be inserted into

the Extension up to the end stop such that they
protrude into the groove ③ on the Spring Arm pivot
④.

 The 2 latch pins ① must audibly snap into place

and be on the same height after the installation.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 30

Mounting the MD21/MD21+ Spring Arm

Section 4

The Figure shows the MD21 Spring Arm [3] and the
MD21+ Spring Arm [4] without and with covers. The
Spring Arms have different geometry. The
installation procedure is identical. The end stop ②
must be mounted for all Spring Arm versions with
cables.

Electrical shock hazard

The Spring Arm with cables ③ must be fitted with an
end stop ② (twist protection) which restricts the swivel
range of the Spring Arm. If the end stop ② is not
mounted, the cables are twisted off and the Arm
System is energized. Contact with energized
components present danger to life from electrical
shock;

 Check that the end stop ② is mounted to the

Spring Arm.

 For the MD21+ [4] the end stop ② from the

accessories must be mounted.

 The Spring Arm must not be mounted without an

end stop ②

Only for the MD21 with cables ③ or optionally for
versions without cables ③

1. Check that the end stop ③ is pre-assembled on
the Spring Arm pivot ①.

 The Spring Arm with cables ③ must not be

mounted without the end stop ②.

 If the end stop ② is not included in the

accessories, contact Customer Service.

Only for the MD21+

1. Place the end stop ② onto the Spring Arm.

 The end stop ② can be rotated by 180°.
 When rotating the end stop ②, the end stop area

of the Spring Arm is rotated by 180°.

 If the end stop ② is not included in the

accessories, contact Customer Service.

*** Risk of the Monitor Arm dropping ***

If the 2 securing segments ② are not properly
mounted, there is a risk of the Spring Arm with the
Monitor Arm/Cradle dropping and causing serious
injury. Check the 2 securing segments ② are securely
in place.

Figure 9: Mounting the MD21/MD21+

System Two LED Installation and Service Manual (1003385 Rev. C) Page 31

Mounting the MD21 Spring Arm (cont)

Section 4

The figure shows the MD21 Spring Arm with and
without the cover panels.

1. Route the pre-assembled cables ③ through the
Extension Arm.

2. Pull the 2 latch pins ① upwards and route the 2
securing segments ② out of the Extension Arm
until they snap in place ⑥.

3. Insert the Spring Arm pivot ⑤ straight into the
Extension Arm up to the end stop without twisting.

4. Insert 2 securing segments ② into the Extension
Arm up to the end stop such that it snaps in place:

 The 2 securing segments ② must protrude into the

groove ④ on the Spring Arm pivot ⑤

 The 2 spring-actuated latch pins ① audibly click

into place.

*** Risk of the Monitor Cradle dropping ***

If the 2 securing segments ② are not properly
mounted, there is a risk of the Spring Arm with the Light
Head dropping and causing serious injury. Check the 2
securing segments ② are securely in place:

 The Spring Arm must be inserted into the

Extension Arm up to the end stop.

 The 2 latch pins ① must audibly snap into place

and be on the same height after the installation

System Two LED Installation and Service Manual (1003385 Rev. C) Page 32

Preparing the MD21 Spring Arm

Section 4

The Figure shows simplified illustrations which
explain how to lay external cables ② in the MD21
Spring Arm [3] (the joint securing device on the
front joint is not shown). The steps for installing
the Spring Arm are identical for the MD21 and the
MD21+.

Marking the cable clips

1. Permanently mark the position ③ of the cable clips
④ on the parallel guide ①;

 The parallel guide of the Spring Arm starts at the

reference edge for the dimensioned distances to
the cable clips ④.

 If the 3 cable clips ④ are not mounted back to their

previous positions, the side panels are pushed on
and no longer flush with each other.

2. Disengage the 3 cable clips ④ laterally from the
parallel guide using a suitable screwdriver and
remove them.

Mounting Cables

1. Adjust the vertical lift of the Spring Arm to the
lowermost horizontal (0°).

Figure 10: Mounting external cables

*** Warning ***

Electrical Shock Hazard

If the external cables ② are not laid next to each other
and without twisting or if the external cables ② are
damaged, the Arm System is energized. Contact with
energized components presents a danger to life from
electrical shock.

 Make sure that you lay the external cables ② next

to each other and without twisting

 Do not damage the cable insulations.

*** Warning ***

Damaged external cables ② can energize the Arm
System.

 Check all external cables ② for damage. Make

sure you insert them with great care without
cables/tubes crossing each other without loops and
without twisting.

 Do not damage the cable insulation

2. Route the external cables ② towards the parallel
guide ① at the bottom of the Spring Arm and then
route them through the Spring Arm next to each
other and without twisting as illustrated n the
Figure.

 To do this, make sure that you centrally lay the

external cable with the largest cross section as
illustrated in the Figure.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 33

Preparing the MD21 Spring Arm (cont)

Section 4

Fixing the cables

1. Click 3 cable clicks ④ onto the previously marked
positions ③ on the parallel guide ① ;

 If the 3 cable clips ④ are not mounted back to their

previous positions, the side panels are pushed on
and no longer flush with each other.

*** Warning ***

Damaged external cables ② can energize the Arm
System.

 Lay the external cables ② in the Spring Arm in

such a way that they are not exposed to tensile
stress in any position.

 Do not damage the cable insulations.
 When inserting or laying external cables ② the

permissible minimum deflection and bending radii
and the permissible maximum tensile stress values
must be observed. The specifications of the
corresponding cable manufacturer must be
adhered to.

2. Check the clearance of the external cables ②;

 The external cables ② must be laid to the front

and rear joint of the Spring Arm with a slight, strain
free curvature.

3. If required, extend the vertical lift of the Spring Arm
in Section 6.

 Check that the external cables ② are not exposed

to tensile stress and that the Spring Arm can be
freely moved.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 34

Preparing the L17 Spring Arm

Section 4

The Figure shows a simplified illustration of the
Spring Arm [5] without cables or Light Head.

*** Risk of the Light Head dropping ***

The Light Head is kept in its position in the Spring Arm
by 2 securing segments. If both securing segments are
dismantled simultaneously from the Spring Arm, there
is a risk of the Light Head dropping out of the Spring
Arm and causing severe injury;

 Dismantle the securing segments one at a time.
Dismantling the first securing segment

1. Rotate the segment securing device ①

approximately 90° to the right, route it slightly down­wards and then remove the first securing segment
②.

 To do this, cover the second securing segment on

the opposite side with your hand in order to prevent
it from dropping out of the Spring Arm.

2. Remove the second securing segment in the same

manner.

3. Route the segment securing device ① back

upwards.

Figure 11: Preparing the L17 Spring Arm

System Two LED Installation and Service Manual (1003385 Rev. C) Page 35

Mounting the Light Head to L17 Spring Arm

Section 4

Installing the Light Head or the Monitor Cradle to
the L17 Spring Arm requires two people to position
the Light Head yoke or Monitor Cradle pivot into
the receptacle.

Use the detail illustrations on the previous page

 Remove the Plastic Covers from the Spring Arm
 Position the yoke pivot directly under the receptacle
 Lubricate the pivot on the Yoke (going into the

Spring Arm) with white grease through the fitting
aperture of the securing segment ②.

 Carefully slide the pivot into the receptacle.

*** Risk of the Light Head dropping ***

 Once the Light Head yoke pivot is in the L17 Spring

Arm you are ready to install the two securing
segment ②.

Mounting the first securing segment

1. Lubricate the securing segment ② with a White

Figure 12: Mounting the Light Head

Note: For In-Light Camera Light Heads and Monitor
Cradles, run the wires from the yoke pivot into the
arm before installing the Light Head.

solid lubricant paste grease (white grease)

2. Route the segment securing device ① slightly

downwards.

 To do this, cover the second securing segment on

the opposite side with your hand in order to prevent
it from dropping out of the Spring Arm.

3. Place the securing segment ② and route the

segment securing device ① towards the top and
then rotate it approximately 90° to the left.

 The cutout ③ in the segment securing device ①

must protrude over the optional brake screw or
brake screw hole ④.

4. Check that the securing segment ② is securely in

place;

 The Light Head/Yoke Assembly or the Monitor

Cradle must rotate freely.

Checking the second securing segment

5. Dismantle and check the second securing segment

as described in Section 6.

6. Re-mount the second securing segment.

Adjusting the vertical lift and the optional brake

 Adjust the vertical lift of the Spring Arm as described

in Section 5.

 Mount the cover panels to the Spring Arm.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 36

Preparing the LCH Spring Arm

Section 4

The Figure shows a simplified illustration of the
Spring Arm [5] without cables or Light Head.

Remove the Plastic Covers as shown

*** Risk of the Light Head dropping ***

The Light Head is kept in its position in the Spring Arm
by ① securing segment. If the securing segment is
dismantled, there is a risk of the Light Head sliding out
of the Spring Arm, dropping and causing severe injury;

 To dismantle the securing segment, route the

adaption with the Light Head/Yoke Assembly or
Monitor Cradle out of the Spring Arm.

Moving the segment securing device

1. Unscrew the Phillips recessed head screw ③.

2. Push the segment securing device ② forwards until

the securing segment ① is accessible.

3. Slightly unscrew the optional brake screw

Dismantling the securing segment

4. Remove the securing segment ① and position the

Light Head/Yoke Assembly or Monitor Cradle out of
the Spring Arm. [5]. Check whether the securing
segment ① achieves a minimum thickness of 0.07”
(1.8mm) and a minimum length of 0.43” (10.9mm);
otherwise, replace the securing segment.

Figure 13: Preparing the LCH Spring Arm

System Two LED Installation and Service Manual (1003385 Rev. C) Page 37

Mounting the Light Head to LCH Spring Arm

Section 4

Figure 14: Mounting the Light Head to an LCH Arm

Note: For In-Light Camera Light Heads, run the
wires from the yoke pivot into the arm before
installing the Light Head.

Installing the Light Head into the LCH Spring Arm
requires two people to position the Light Head yoke
pivot into the receptacle.

Use the detail illustrations on the previous page

*** Risk of the Light Head dropping ***

 Align the yoke pivot to the receptacle on the LCH

Spring Arm.

 Lubricate the pivot on the Yoke (going into the

Spring Arm) with white grease through the fitting
aperture of the securing segment ②.

 Carefully insert the pivot into the receptacle until it

stops.

 Once the Light Head yoke pivot is in the LCH Spring

Arm you are ready to install the securing segment
②.

Mounting the securing segment

1. Lubricate the securing segment ① with white

grease.

2. Lubricate the pivot of the Light Head/Yoke Assembly

or the Monitor Cradle with white grease.

3. Insert the Pivot on the Light Head/Yoke into the

Spring Arm assuring the groove in the yoke pivot
aligns with the securing segment slot in the arm.
Once alignment is achieved, insert the securing
segment ①.

4. Check that the securing segment ① is securely in

place;

 The Light Head must rotate freely.

Moving the segment securing device

5. Re-tighten the optional brake screw

6. Push the segment securing device ② backwards

and screw it on using 1 Phillips recessed head
screw ③.

Adjusting the vertical lift and the optional brake

7. Adjust the vertical lift of the Spring Arm as described

in Section 5;

 Mount the cover panels to the Spring Arm.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 38

Positioning the Light

Section 4

Positioning the Arm System
The Figure illustrates the configuration example of
the System Two LED central axis S1.

The Extension Arm [4], Spring Arm [5] and the Light
Head or Monitor can be positioned easily. The swivel
range and the vertical lift can be restricted through
internal end stops.

 Arms with standard Light Heads have continuous

rotation

 Arms with Monitor Cradles or with Light Heads with

In-Light Cameras have rotational stops to prevent
the wires from being damaged during use.

Swiveling the Arm System

*** Notice ***

To prevent damage to the Arm System;
 Do not hit the end stops hard

Figure 15: Positioning the Arms

 Avoid collisions with other components.
 Slowly swivel the Light Head
 Depending on the individual version the swivel

range ends at the internal end stops of the
Extension Arm [4] and the Spring Arm [5].

Adjusting the Height of the Arm System

*** Notice ***

If the Light Head or Monitor is moved upwards, there is
a risk that it could collide with other components.

 Prior to adjusting the height, check for potential risks

of collision.

 Slowly adjust the height of the Light Head.
 The height adjustment is restricted by the internal

end stops of the Spring Arm [5]. If the Extension
Arm [4], the Spring Arm [5], the Light Head do not
remain stable in the set position, the spring tension
or brake force must be adjusted.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 39

Section 5: Adjustments
Adjusting the Brakes for the Extension Arm

Figure 16: Dismantling the right-hand cover panels from
the Extension Arm

Section 5

To adjust the brakes, the cover panels must be
dismantled from the corresponding Extension Arm [4].

The dismantling of the cover panels is described using
the example of the System Two LED central axis S1.
The installation procedure for further versions is
identical.

Follow the safety instructions on Page 56.
Dismantling the cover panels on the right-hand

side from the Extension Arm

1. Unscrew the 2 PT Torx screws① from the top and

bottom sides of the left-hand Extension Arm cover
panel.

2. Insert a suitable slotted screwdriver into the fitting

aperture in the right-hand Extension Arm cover from
below and disengage it by gently pushing it in.

3. Insert a suitable slotted screwdriver into the fitting

aperture of the left-hand Extension Arm from above
and disengage it by gently pushing it in.

4. Disengage the right-hand Extension Arm cover

panel ④ from the edge of the connection of the 2
Extension Arm cover panels.

5. Gently remove the right-hand Extension Arm cover

panel from the Extension Arm [4].

 To do this, gently disengage the latches ③.

Dismantling the left-hand cover panel from the
Extension Arm

1. Unscrew the 2 PT Torx screws from the left-hand

Extension Arm panel.

2. Gently remove the left-hand Extension Arm cover

② from the Extension Arm [4].

Figure 17: Dismantling the left-hand cover panel from the
Extension Arm

System Two LED Installation and Service Manual (1003385 Rev. C) Page 40

Adjusting the Brakes for the Extension Arm (cont)

Section 5

Figure 18: Adjusting the Extension Arm brakes

The adjustments of the brakes are illustrated using
the example of the System Two LED central axis S1
version. The installation procedure for further
versions is identical.

Follow the safety instructions on Page 56.
Position and number of brake screws

 Each Extension Arm [4] is fitted with 2 brake screws

① positioned opposite to one another.

Adjusting the brakes

 Adjust the brakes such that the Extension Arm 4

remains stable in any set position and can still be
conveniently adjusted.

 Use an Allen key (size 5).

To increase the brake force

 Insert the Allen key into the brake screws and

alternately turn with the same number of revolutions
in the clockwise direction as illustrated in the Figure.

To reduce the brake force

 Insert the Allen key into the brake screws and

alternately turn with the same number of revolutions
in the counterclockwise direction as illustrated in the
Figure.

Perform a function test.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 41

Adjusting the Brakes for the Extension Arm (cont)

Section 5

Figure 19: Mounting the right-hand cover panel to the
Extension Arm

Mounting the right-hand cover panel to the
extension

Mounting the rear cover panels to the Extension
Arm

The mounting of the cover panels is illustrated using
the example of the System Two LED central axis S1
version. The installation procedure for further versions
is identical.

Follow the safety instructions on Page 56.
Mounting the left-hand cover panel to the

Extension Arm

1. Position the left-hand Extension Arm cover panels

③ on the Extension Arm such that the top cover
panel ① sits in the Extension Arm cover ③.

2. Tighten the left-hand Extension Arm cover panel ③

using 2 PT Torx screws ②.

Mounting the right-hand cover panel to the
Extension Arm

1. Place the right-hand Extension Arm cover panel ③

into the left-hand Extension Arm cover panel.

 Make sure that the rear latches ② engage with

each other in a 90° angle and then close the
Extension Arm cover panels like a hinge.

Figure 20: Mounting the left-hand cover panel
to the Extension Arm

2. Screw the right-hand Extension Arm cover panel ③

onto the top and bottom sides of the left-hand
Extension Arm cover panel using 2 PT Torx screws
①.

3. Check that the Extension Arm cover panels are

securely in place;

 The Extension Arm cover panels must engage

tightly with each other without gaps.

 The 2 PT Torx screws ① – must be tightened.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 42

Adjusting the Brakes for the Spring Arm

Figure 21: Dismantling the decorative caps and socket
covers

Figure 22: Adjusting the brakes

The above figures show simplified illustrations of
the Extension Arm without the Spring Arm.

To adjust the brakes the front socket covers must
be dismantled from the corresponding Extension
Arm [4].

Follow the safety instructions on Page 56.
Dismantling the decorative caps

1. Simultaneously push the 2 decorative caps ④

forwards in order to route the 2 straps ⑧ out of the
cutouts ⑦.

2. Gently disengage the locking pins ⑥ on the

decorative caps ④.

3. Gently route the decorative caps ④ out of the 2

holes ⑤ on the socket covers ② and remove them.

Dismantling the socket covers

1. Unscrew 2 cross recessed head screws ① from the

right- and left-hand socket cover ②.

2. Gently disengage the locking pins ③ and remove

the right- and left and socket cover with optional
cover plates ②.

Adjusting the brakes
Position and number of brake screws

 Each Extension Arm [4] is fitted with 2 brake screws

① positioned opposite to one another.

Adjusting the brakes

 Adjust the brakes such that the Spring Arm remains

stable in any set position and can still be
conveniently adjusted.

Tool to be used

 Use an Allen key (size 5) to increase the brake force
 Insert the Allen key into the brake screws ① and

alternately turn with the same number of revolutions
in the clockwise (+) direction as illustrated in the
Figure.

To reduce the brake force

 Insert the Allen key into the brake screws ① and

alternately turn with the same number of revolutions
in the counterclockwise (-) direction as illustrated in
the Figure.

Perform a functionality test.

Section 5

System Two LED Installation and Service Manual (1003385 Rev. C) Page 43

Adjusting the Brakes for the Spring Arm (cont)

Section 5

Figure 23: Mounting the socket covers and decorative
caps to the Extension Arms

The Figure shows a simplified illustration with only
the Extension Arm [4] without Spring Arm.

Mounting the socket covers to the Extension Arm

1. Screw the left-hand socket cover with optional cover

plate ② onto the Extension Arm [4] using 2 cross
recessed head screws ①.

2. Place the right-hand cover panel with optional cover

plate onto the left-hand socket cover ② such that all
the locking pins ③ engage with each other and
screw it onto the Extension Arm [4] using 2 cross
recessed head screws ①.

3. Check that the socket cover with optional cover

plates is securely in place;

 The socket covers with optional cover plates ②

must tightly engage with each other without gaps
and be tightened with 2 cross recessed head screws
①.

Mounting the decorative caps

*** Notice ***

To prevent damage to the decorative caps;

 The mounting steps described below must be

executed in the correct order:

1. Attach the locking mechanisms ⑥ of the decorative

caps ④ into the 2 fittings ⑤ on the socket covers
②.

2. Fold the decorative caps ④ towards the Extension

Arm [4] and insert the straps ⑧ into the cutout ⑦
on the socket covers ②.

3. Check that the decorative caps ④ are securely in

place;

 The decorative caps ④ must securely engage in the

socket covers ② without gaps.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 44

Adjusting the Comfort Stop on the Extension Arm

Section 5

Figure 24: Adjusting the Comfort Stop end stop on the
Extension Arm

The adjustment of the comfort end stop is illustrated
using the example of the Single Extension Arm. The
procedure for the multiple arm versions is identical.
The comfort end stop can be separately adjusted for
each Extension Arm. The minimum, reduced swivel
range is 15°.

Dismantling the rear cover panels from the
Extension Arm.

4. Dismantle the Extension Arm covers as described
on Page 40 and the following pages.

Prepare the adjustment

5. Rotate the Extension Arm [6] such that the 2 Allen
Screws are accessible.

6. Unscrew the 2 Allen screws ①.

7. Rotate the Extension Arm [6] in position such that
the recess ③ in the end stop ring ② is visible.

Restricting the clockwise rotation of the Extension
Arm

The swivel range of the Extension Arm [6] is defined by
the position of the 3 end stops ② / ④ / ⑤ engaged
tightly with each other.

8. Push the end stop ring ② out of the 2 fit-in keys (8)
towards the top and slightly rotate it such that it is
positioned on top of the fit-in keys ⑧.

9. Rotate the Extension Arm [6] into the first end stop
position.

10. Lift the end stops ④ / ⑤ together and rotate them
in position such that the 2 end stop pins ⑥ are
positioned on the right-hand side of the recess ③
in the end stop rings.

11. Lower the end stops ④ / ⑤ such that the teeth
protrude into the fixed compensating disc ⑦.

12. Rotate the end stop ring ② slightly backwards in
order to be able to insert the groove ⑨ of the end
stop ring ② into the 2 fit-in keys ⑧ and lower the
end stop ring ② once again.

13. Next, rotate the Extension Arm [6] clockwise in
order to check the end stop position.

• Repeat the steps in order to readjust the end stop if
required.

Continue on the next page

System Two LED Installation and Service Manual (1003385 Rev. C) Page 45

Adjusting the Comfort Stop on the Extension Arm- (cont)

Section 5

The swivel range of the Extension Arm [6] is defined by
the position of the 3 end stops ② / ④ / ⑤ engaged
lightly with each other.

14. Push the end stop ring ② out of the 2 fit-in keys ⑧
towards the top and slightly rotate it such that it is
positioned on top of the fit-in keys ⑧.

15. Rotate the Extension Arm [6] into the second end
stop position desired.

16. Lift the end stop ④ and rotate it in position such
that the end stop pin ⑥ sits to the left of the recess
(3) of the end stop ring ②.

17. Lower the end stop ④ such that the teeth protrude
into the fixed compensating disc ⑦.

18. Rotate the end stop ring ② slightly backwards in
order to be able to insert the groove (9) of the end
stop ring ② into the 2 fit-in keys ⑧ and lower the
end stop ring ② once again.

19. Next, rotate the Extension Arm [6] anti-clockwise in
order to check the end stop position.

• Repeat the steps in order to readjust the end stop if
required.

Reversing the movement range by 180°

20. Since the 2 grooves ⑧ of the end stop ring ② sit
opposite to each other, the end stop ring can be
staggered by 180°.

• By changing the position of the end stop ring ② its
movement range is reversed.

21. Screw in and tighten 2 Allen screws ①.

Mounting the rear cover to the Extension Arm

22. Mount the rear cover panels to the Extension Arm
as described on Page 40.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 46

L21/MD21 Spring Arm

Section 5

System Two LED Spring Arm L21/MD21

Identify the version of the Spring Arm [5] mounted
according to the information on the rating plate.

The adjustment of the Spring Arms L21/MD21 is
identical.

You can identify your System Two LED Spring Arm L21
mounted by the TYPE designation: L21.

You can identify your System Two LED Spring Arm
MD21 mounted by the TYPE designation: MD21.

The rating plate is attached to the top side of the Spring
Arm [5].

Figure 25: Spring Arm L21/MD21

System Two LED Installation and Service Manual (1003385 Rev. C) Page 47

Adjusting the Spring Tension

Figure 26: Adjusting the spring tension

Section 5

The Spring Arm [5] is equipped with a spring which
compensates the weight of the Light Head or the
weight of a monitor.

Adjust the spring tension such that the Spring Arm with
remains stable in any set position.

Follow the safety instructions on Page 56.
Disengaging the cover plate

1. Insert a suitable slotted screwdriver into the

mounting aperture ④

2. Slightly push the slotted screwdriver upwards and

route the snap-in hook ① out of the cover.

3. Push the slotted screwdriver with the cover plate ③

backwards.

Setting

 Use an Allen key (size 5).

4. Gently route any electric cables ⑥ towards the side

and insert the Allen key into the adjustment aperture
⑤.

 Route the Spring Arm approximately +5° to +10°

upwards in order to relieve the adjustment screw. If
the Spring Arm moves down, the spring tension is
too low

 Turn the Allen key to the left (counter-clockwise) as

illustrated in the Figure. If the Spring Arm moves up,
the spring tension is too high

 Turn the Allen key to the right (clockwise) as

illustrated in the Figure.

5. Perform a function test.

Engaging the cover plate

6. Push the cover plate ③ forward and manually insert

the 2 latches ② into the cover panel.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 48

7. Insert the slotted screwdriver into the hole ④, push

the cover plate ③ slightly upwards and route the
snap-in hook ① into the cover panel.

8. Move the Spring Arm up & down and check that the

cover plate ③ is securely in place.

 The snap-in hook ① must sit in the cover panel.
 The cover plates must slide in the lateral guides

without being trapped.

Adjusting the Vertical Lift

Figure 27: Adjusting the vertical lift

Section 5

The vertical lift can be adjusted from approximately
0° to + 45° in the upwards direction.

Follow the safety instructions on Page 56.
Dismantling the cover panels and moving the cover

plates

1. On each side push the PUSH button ① labeled

"PUSH" and accept.

2. Unscrew 1 cross recessed head screw ② from each

side.

 Use a Torx T10 screwdriver.

3. Remove 1 cover panel ③ from each side.

 To do this, gently disengage the latches.

4. Push the upper and lower cover plate ④

backwards.

Setting

 Use an Allen key (size 5).

5. Insert the Allen key into the adjustment hole ⑤.

 Slightly pull down the Spring Arm in order to relieve

the adjustment screw in the Spring Arm.

To reduce the swivel range

 Turn the Allen key to the left (counter-clockwise) as

illustrated in the Figure.

To extend the swivel range

 Turn the Allen key to the right (clockwise) as

illustrated in the Figure.

6. Perform a function test.

Mounting the cover panels

7. Rotate the cutout in the segment securing device ⑥

such that it laterally protrudes over the optional
brake screw or brake screw aperture ⑦.

8. Place 1 cover panel ③ on each side and screw it on

using 1 cross recessed head screw ②.

 To do this, gently engage the latches.

9. Insert one PUSH button ① on each side such that it

is flush with the cover panels ③.

 The PUSH button ① must not protrude.

Engaging the cover plates

10. Push the upper and lower cover plates ④ forwards
and manually insert 2 latches ⑧ each into the
cover panel’s ③.

11. Using a suitable slotted screwdriver, push the cover
plates’ ③ further into the cover panels③ until they
audibly click into place.

 The latches ⑧ of the cover plates ④ have now

snapped into place.

12. Move the Spring Arm up and down and check that
the cover plates’ ④ are securely in place.

 The cover plates must slide in the lateral guides

without being trapped.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 49

Adjusting the Optional Brake

Figure 28: Adjusting the optional brake

Section 5

Adjust the brakes such that the Light Head or
Monitor remains stable in any set position and can
still be conveniently adjusted.

Follow the safety instructions on Page 56.
Dismantling the cover panels and moving the cover

plates

1. On each side push the PUSH button ① labeled

"PUSH" and accept.

2. Unscrew 1 cross recessed head screw ② from each

side.

 Use a Torx T10 screwdriver.

3. Remove 1 cover panel ③ from each side.

 To do this, gently disengage the latches.

4. Push the upper and lower cover plate ④

backwards.

Setting

 Use a suitable slotted screwdriver.

To increase the brake force

 Insert the slotted screwdriver into the brake screw

⑥ as illustrated in the Figure and turn it in the
clockwise direction.

To reduce the brake force

 Insert the slotted screwdriver into the brake screw

⑥ as illustrated in the Figure and turn it in the
counter-clockwise direction.

5. Perform a function test.

Mounting the cover panels

6. Rotate the cutout in the segment securing device⑤

such that it laterally protrudes over the optional
brake screw or brake screw aperture ⑥.

7. Place 1 cover panel ③ on each side and screw it on

using 1 cross recessed head screw②.

 To do this, gently engage the latches.

8. Insert one PUSH button ① on each side such that it

is flush with the cover panels ③.

 The PUSH button ① must not protrude.

Engaging the cover plates

9. Push the upper and lower cover plates ④ forwards

and manually insert 2 latches ⑦ each into the cover
panels ③.

10. Using a suitable slotted screwdriver, push the cover
plates ④ further into the cover panels ③ until they
audibly click into place.

 The latches ⑦ of the cover plates ④ have now

snapped into place.

11. Move the Spring Arm up and down and check that
the cover plates ④ are securely in place.

 The cover plates must slide in the lateral guides

without being trapped.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 50

Adjusting the Vertical Lift – LCH Arm

Section 5

The vertical lift can be adjusted from approx. 0 to
+20° in the upwards direction at maximum carrying
load. It can be adjusted to up to +45° in the case of
lower carrying loads.

Follow the safety instructions on Page 56.
Dismantling the left-hand cover panel

1. On the left-hand side push the PUSH button ①

labeled "PUSH" and accept.

2. Unscrew one cross recessed head screw ②.

 Use a Torx T10 screwdriver.

3. Remove the cover panel ③.

 To do this, gently disengage the latches.

Dismantling the right-hand cover panel

4. Unscrew the 3 PT Torx screws④.

 Use a Torx T10 screwdriver.

5. Remove the right-hand cover panel ⑤.

Setting

 Use an Allen key (size 5)

6. Insert the Allen key into the adjustment hole ⑥.

 Slightly pull down the Spring Arm in order to relieve

the adjustment screw in the Spring Arm.

To reduce the swivel range

 Turn the Allen key to the left (counter-clockwise) as

illustrated in the Figure.

To extend the swivel range

 Turn the Allen key to the right (clockwise) as

illustrated in the Figure.

7. Perform a function test.

Mounting the right-hand cover panel

8. Place the right-hand cover panel ⑤ and screw it on

using 3 PT Torx screws ④.

Mounting the left-hand cover panel

9. Place the left-hand cover panel ③ and screw it on

using 1 cross recessed head screw ②.

 To do this, gently engage the latches.

10. Insert the PUSH button ① such that it is flush with
the cover panel ③.

 The PUSH button ① must not protrude.

Figure 29: Adjusting the vertical lift

System Two LED Installation and Service Manual (1003385 Rev. C) Page 51

Adjusting the Optional Brake – LCH Arm

Section 5

Adjust the brakes such that the Light Head or
Monitor remains stable in any set position and can
still be conveniently adjusted.

Follow the safety instructions on Page 56.
Dismantling the cover panels

1. Dismantle the cover panels as previously described

Moving the segment securing device

2. Push the segment securing device ② forwards until

the brake screw is accessible.

Setting

 Use a suitable slotted screwdriver.

To increase the brake force

 Insert the slotted screwdriver into the brake screw

① as illustrated in the Figure and turn it in the
clockwise direction.

To reduce the brake force

 Insert the slotted screwdriver into the brake screw

① as illustrated in the Figure and turn it in the
counter-clockwise direction.

3. Perform a function test.

Moving the segment securing device

4. Push the segment securing device backwards and

screw it on using 1 Phillips recessed head screw.

 Make sure that the segment securing device does

not protrude from the fitting aperture ④.

Mounting the cover panels

5. Re-mount the cover panels as illustrated.

Figure 30: Adjusting the optional brake

System Two LED Installation and Service Manual (1003385 Rev. C) Page 52

Section 5

Figure 31: Yoke Rotational
Brake - Double Yoke

Figure 30: Yoke Rotational

Brake - Single Yoke

Adjusting the Yoke Brake

In the event that the Light Head will not maintain its position, you can apply friction to the rotation by using the Yoke
Rotational Brake. On the Double Yoke version, there are two brakes and on the Single Yoke version (LCH), there is
one brake. Turn the brake clockwise to increase the resistance on the Light Head Rotation. Only tighten enough to
maintain position.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 53

Section 5

Installation and Removal for the Sterilizable Handle Assembly (Camera Lights only)

Before the light can be used, the Sterilizable Handle Assembly must be installed.

The D2C comes equipped with an interchangeable Sterilizable Handle Assembly. The available interchangeable
options are the Sterilizable Handle Assembly and a HD Camera Assembly.

To install the Sterilizable Handle Assembly it is first necessary to remove the plastic Sterilizable Handle, then turn
the mounted light head so that the LED’s face vertically towards the ceiling. Position the Handle Assembly so that
the alignment pins align with the corresponding alignment holes in the light head. Using one hand to prevent the
light head from moving gently push the Handle Assembly until it is firmly inserted into the light head. Then fasten
the three captive screws and reattach the plastic Sterilizable Handle. The light head is now ready to use.

To remove the Sterilizable Handle Assembly, reverse the above sequence.

Figure 32: Attaching the Sterilizable Handle

System Two LED Installation and Service Manual (1003385 Rev. C) Page 54

Section 5

Installation and Removal for the HD Camera Assembly (Camera Lights only)

To install the HD Camera Assembly it is first necessary to remove the Sterilizable Handle Assembly as listed
above. Once the Sterilizable Handle Assembly has been removed and the light head has the LED’s facing vertically
towards the ceiling, remove the outer housing on the camera by pushing the retaining ball and sliding the outer
housing off of the Camera Assembly. Then position the Camera Assembly so that the alignment pins align with the
corresponding alignment holes in the light head. Using one hand to prevent the light head from moving gently push
the Camera Assembly until it is firmly inserted into the light head. Then fasten the three captive screws and reinstall
the camera outer housing (a click will be heard when the housing is locked in place). The light head now has HD
Camera ready.

NOTE: The camera is a delicate instrument and must be handled with caution.

Figure 33: Camera Assembly (D2C only)
Figure 34: Inserting Camera Assembly (D2C only)

System Two LED Installation and Service Manual (1003385 Rev. C) Page 55

Section 6: General Maintenance
General Safety

Section 6

Electric shock hazard! The Arm
System can carry an electric
current and must be treated with
the utmost care during cleaning
and disinfection

Only facility authorized
maintenance personnel should
troubleshoot and/or repair the
Lighting System.
Troubleshooting by unauthorized
personnel could result in
personal injury and/or property
damage.

No modification of this equipment
is allowed. Do not modify this
equipment without authorization
of the manufacturer. If this
equipment is modified,
appropriate inspection and
testing must be conducted to
ensure continued safe use of the
equipment.

Isolation from Supply Mains- The
isolation shall be provided by the
facility. Appropriate Breakers
with simultaneous action to all
poles shall be made available.

The articulating arm is spring
loaded. When removing the
head/yoke ensure that the arm
lock pin has been installed.
Failure to do so could result in
personal injury and/or property
damage.

The articulating arm is spring
loaded. Never remove the arm
lock pin until the head/yoke has
been installed. Failure to do so
could result in personal injury
and/or property damage.

Follow the product

manufacturer’s instructions.

Failure to do so could result in
personal injury and/or property
damage.

If the unit fails any part of the preventive
maintenance functional checks, repair the unit
before use on any patient. Failure to do so could
result in personal injury and/or property damage.

Do not use harsh cleaners, solvents, or
detergents. Failure to do so could result in
equipment damage.

Do not use silicone based lubricants. Equipment
damage could occur.

The front lens is supplied with a protective hard
coat to resist scratching. Never use abrasive
cleaners on the front lens. Failure to do so could
result in equipment damage.

Turn off main power before any repairs are
started. Failure to do so could result in personal
injury and/or property damage.

Do not pinch any wires during installation.
Pinched wires can cause an electrical shock
hazard, resulting in personal injury and/or
property damage.

Use only Medical Illumination fuses P/N 0001475
(250 VAC/1.6A slow-blow, Break Capacity: 150%,

1.6A @ 60 minutes min. 1000%, 1.6A @ 20ms min
to 300ms max.) if replacement is necessary.
Failure to do so could result in personal injury
and/or property damage.

Do not expose the unit to excessive moisture.
Failure to do so could result in personal injury
and/or property damage.

Do not rest articles or liquids on top of the System
Two LED Surgical Lighting System. Spilled liquids
will damage the light head and arm assemblies
causing an electric shock hazard.

Use only a White Solid Lubricant Paste Grease
(white grease) in lubricating securing segments.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 56

Disinfection

Disinfection method

Section 6

Follow general safety precautions

*** Warning ***

Other than the Sterilizable Handle on the Light Head, the
Arm System is not suitable for sterilization

Avoid damage

 Make sure that no liquid penetrates the appliance whilst

cleaning it

 To prevent damage to plastic parts, refrain from using

abrasives or alkaline, acidic or corrosive cleaning agents.

 Do not use bleaching agents on stainless steel parts.

Deploy trained technical specialists only and abide by
national regulations.

 Cleaning/disinfection must be carried out by trained

technical specialists only.

*** Caution ***

Health hazard

Disinfectants can contain substances hazardous to health
which, when in contact with the skin and eyes, can cause
injuries or affect the respiratory organs when inhaled. Observe
the protective measures;

 Observe the hygiene regulations.
 Adhere to the disinfectant manufacturer's instructions.
 Perform surface disinfection every working day and in case

of contamination.

Wiping disinfection is the standardized disinfection method
prescribed for the Light System. Hygiene regulations and
related safety instructions for the disinfection methods to be
applied must be defined by the operator.

 In case of contamination with potentially infectious material

(e.g. blood, body secretion or excrement) the surfaces
must be immediately and specifically disinfected.

 Make sure you apply the disinfectant in the correct

concentration.

 For surface disinfection do not spray, but wipe, the

surfaces.

 Wiped surfaces may only be used after the disinfectant has

dried.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 57

Handle Sterilization and Cleaning

Figure 35: Handle Sterilization

Cleaning Agents

Section 6

The System Two LED features a removable
sterilizable Handle.

Handle Sterilization

 Remove the sterilizable handle by pressing the

Handle Button near the base of the handle towards
the center and pull the handle off the handle post.

 Sterilize the handle utilizing steam sterilization of

minimum 250 Fahrenheit for a minimum of 30
minutes in compliance with AAMI-SSSa-1988 Good
Hospital Practices, Steam Sterilization and Sterility
Assurance, or equivalent method.

Cleaning
Follow the safety instructions on Page 56.

*** Warning ***

Risk of contamination and infection of the patient
Parts of the pendant system and the adaptations
are made of plastic. Solvents can dissolve plastic
materials. Strong acids, bases and agents with an
alcoholic strength of more than 60% can lead to the
plastic materials becoming brittle. Detached
particles can fall into open wounds. If liquid
cleaning agents are allowed to penetrate the
pendant system and the adaptations, excess
cleaning liquid may drip into open wounds.

Recommended cleaning agents Use a mild soap
solution or a regular dishwashing product.

1. Wipe the surfaces of the appliances with a
moderately moist cloth; add a mild soap solution
(dishwashing product) if required.

2. Afterwards, carefully wipe the surfaces dry with a
clean cloth.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 58

Maintenance

Section 6

*** Warning ***

Electric shock hazard
Power supply cables are laid in the pendant system, the

adaption and the end device. Contact with energized
components presents a danger to life from electric shock.
Disconnect the appliance from the mains before any
maintenance work;

 Disconnect all the poles of the pendant system from the

mains and prevent it from being switched back on again.

 Make sure that the Light Head or Monitor connected are

de-energized.

 Wait until the Light Head or Monitor has cooled down.

*** Warning ***

Carrying out maintenance work
Maintenance work may only be carried out by qualified

personnel who have been authorized and instructed by
the operator.

Built-in components from third-party manufacturers

Built-in components from third-party manufacturers must be
inspected and maintained as prescribed in the applicable
Operating Instructions.

Repeated inspection

The repeated inspection must be performed in accordance
with DIN EN 62353 standard.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 59

Checking the securing segments on the Extension Arm

The Figure shows a simplified illustration of the
Extension Arm [4] without cables, Spring Arm, or
Light Head.

The 2 securing segments for each Extension Arm [4]
must be checked for minimum strength, lubricated with
white grease and replaced if the minimum strength is
not achieved.

Dismantling the decorative caps

1. Simultaneously push the 2 decorative caps ④
forwards in order to route the 2 straps ⑧ out of the
cutouts ②.

2. Gently disengage the locking pins ⑥ on the
decorative caps ④.

3. Gently route and remove the decorative caps ④ out
of the 2 holes ⑤ on the socket covers ②

Dismantling the socket covers

1. Unscrew 2 cross recessed head screws ① from the
right- and left-hand socket cover ②.

2. Gently disengage the locking pins ③ and remove
the right- and left-hand socket cover with optional
cover plates ②.

Dismantling the securing segments

The Figure shows a simplified illustration of the
Extension Arm [4] without cables, Spring Arm, adaption
and end device.

Figure 36: Dismantling the decorative caps and socket covers
from the Extension Arm

Risk of the Light Head dropping

The Spring Arm is kept in position by 2 securing
segments. If both securing segments are dismantled
simultaneously from the Extension Arm, there is a risk
of the Spring Arm, Light Head or Monitor dropping out
of the Extension Arm and causing severe injury;

Section 6

*** Warning ***

 Dismantle the securing segments one after the

other.

Dismantling the first securing segment

1. Push the latch pin ① slightly upwards and remove
the securing segment ②.

2. Check whether the securing segment ② achieves a
minimum thickness of 0.08” (2.1mm) and a minimum
length of 0.97” (24.5mm); otherwise, replace the
securing segment.

 Use a caliper gauge for measurement.
 Replace the securing segment ② if the specified

dimensions are not achieved.

Figure 37: Dismantling the securing segment

System Two LED Installation and Service Manual (1003385 Rev. C) Page 60

Mounting the securing segments

Figure 38: Mounting the securing segment

Section 6

Figure shows a simplified illustration of the
Extension Arm [4] without cables, Spring Arm and
end device.

1. Lubricate the securing segment ② with white grease.

2. Lubricate the Spring Arm pivot (not illustrated in the
Figure) with white grease through the fitting aperture
of the securing segment ②.

3. Route the securing segment ② into the Extension
Arm until it snaps into place.

 The spring-actuated latch pin ① audibly clicks into

place.

4. Check securing segment ② is securely in place;

 The latch pin ① must audibly click into place.
 The latch pin ① is at the same height as its opposite

latch pin.

5. Dismantle and check the second securing segment.

 The second securing segment is on the opposite

side.

6. Re-mount the second securing segment

Mounting the socket covers and decorative caps to
the Extension Arm

1. Screw the left-hand socket cover with optional cover
plate ② onto the Extension Arm [4] using 2 cross
recessed head screws ①.

2. Place the right-hand cover panel with optional cover
plate onto the left-hand socket cover ② such that all
the locking pins ③ engage with each other and
screw it onto the Extension Arm [4] using 2 cross
recessed head screws ①.

3. Check that the socket cover with optional cover
plates ② is securely in place;

 The socket covers with optional cover plates ② must

tightly engage with each other without gaps and be
tightened with 2 cross recessed head screws ①.

Mounting the decorative caps

*** Notice ***

Damage to the decorative caps
To prevent damage to the decorative caps;

 The mounting steps described below must be

executed in the correct order:

1. Attach the locking mechanisms ⑥ of the decorative
caps ④ into the 2 fittings ⑤ on the covers ②.

2. Fold the decorative caps ④ towards the Extension
Arm 4 and insert the straps ⑧ into the cutout ⑦ on
the socket covers ②.

3. Check that the decorative caps ④ are securely in
place;

Figure 39: Mounting the socket covers and decorative
caps to the Extension Arm

System Two LED Installation and Service Manual (1003385 Rev. C) Page 61

 The decorative caps ④ must securely engage in the

socket covers ② without gaps.

Checking the securing segment on the Spring Arm - L21/MD21

Checking the securing segment on the Spring Arm
L21/MD21

The 2 securing segments for each Spring Arm 5 must
be checked for minimum strength, lubricated with white
grease and replaced if the minimum strength is not
achieved.

Identify the version of the Spring Arm [5] mounted
according to the information on the rating plate.

You can identify your Spring Arm L21 mounted by the
TYPE designation: L21.

You can identify your Spring Arm MD21 mounted by
the TYPE designation: MD21.

The rating plate is attached to the top side of the Spring
Arm [5].

Adjusting the Spring Arm to the lowermost horizontal
(0°) end stop position

Follow the safety instructions on Page 56.

*** Warning ***

Section 6

*** Risk of Light Head dropping ***

The Light Head is kept in its position in the Spring
Arm by 2 securing segments. If the 2 securing
segments are dismantled simultaneously, there is a
risk of the Light Head or Monitor sliding out of the
Spring Arm. In this case the Spring Arm suddenly
jumps up and can cause severe injury;

 Before checking the securing segments set the

Spring Arm to its lowermost horizontal (0°) end stop
position.

1. Set the Spring Arm [5] to its lowermost horizontal
(0°) end stop position.

 To do this, dismantle the cover panels from the

Spring Arm and remount them after checking the
securing segments.

2. Check that the Spring Arm is safely locked in place;

 Once the Spring Arm has been fixed in its lowermost

horizontal position, it must no longer be possible to
move the Spring Arm upwards

Figure 40: Adjusting the L17/MD21 Spring Arm

System Two LED Installation and Service Manual (1003385 Rev. C) Page 62

Section 6

Dismantling and re-mounting the securing segment

The light head and monitor cradle are kept in its
position in the Spring Arm by 2 securing segments.
If both securing segments are dismantled
simultaneously from the Spring Arm, there is a risk
of the light head or monitor cradle dropping out of
the Spring Arm and causing severe injury;

 Dismantle the securing segments one after the

other.

Dismantling the first securing segment

1. Rotate the segment securing device ①
approximately 90° to the right, route it slightly down­wards and then remove the first securing segment
②.

 To do this, cover the second securing segment on

the opposite side with your hand in order to prevent
it from dropping out of the Spring Arm.

2. Route the segment securing device ① back
upwards.

3. Check whether the securing segment ② achieves a
minimum thickness of 0.07” (1.8mm) and a minimum
length of 0.33” (8.3mm); otherwise, replace the
securing segment.

 Use a caliper gauge for measurement.
 Replace the securing segment ② if the specified

dimensions are not achieved.

Mounting the first securing segment

4. Lubricate the securing segment ② with white
grease.

5. Route the segment securing device ① slightly
downwards.

 To do this, cover the second securing segment on

the opposite side with your hand in order to prevent
it from dropping out of the Spring Arm.

6. Lubricate the pivot of the Light Head/Yoke Assembly
or Monitor Cradle with white grease through the
fitting aperture of the securing segment ②.

7. Place the securing segment ② and route the
segment securing device ① towards the top and
then rotate it approximately 90° to the left.

 The cutout ③ in the segment securing device ①

must protrude over the optional brake screw or
brake screw hole ④.

8. Check that the securing segment ② is securely in
place;

 The Light Head or Monitor must rotate freely.

Checking the second securing segment

9. Dismantle and check the second securing segment.

10. Re-mount the second securing segment.

Figure 41: Checking the securing segment

System Two LED Installation and Service Manual (1003385 Rev. C) Page 63

Adjusting the vertical lift and the optional brake

11. Adjust the vertical lift of the Spring Arm and the

optional brake described previously.

 Mount the cover panels to the Spring Arm.

Securing segment on the Spring Arm - LCH17

Figure 42: Adjusting the LCH17 Spring Arm

Section 6

The 2 securing segments for each Spring Arm [5]
must be checked for minimum strength, lubricated
with white grease and replaced if the minimum
strength is not achieved.

Identify the version of the Spring Arm [5] mounted
according to the information on the rating plate.

You can identify your Spring Arm LCH17 mounted by
the TYPE designation: LCH17.

The rating plate is attached to the top side of the Spring
Arm [5].

Adjusting the Spring Arm to the lowermost horizontal
(0°) end stop position

Follow the safety instructions on Page 56.

The Light Head/Yoke Assembly or Monitor Cradle is
kept in its position in the Spring Arm by 1 securing
segment. If the securing segment is dismantled, there
is a risk of the Light Head or Monitor sliding out of the
Spring Arm. In this case the Spring Arm suddenly
jumps up and can cause severe injury;

• Before checking the securing segments set the
Spring Arm to its lowermost horizontal (0°) end stop
position.

1. Set the Spring Arm [5] to its lowermost horizontal
(0°) end stop position.

• To do this, dismantle the cover panels from the
Spring Arm and remount them after checking the
securing segments.

2. Check that the Spring Arm is safely locked in place.
Once the Spring Arm has been fixed in its lowermost
horizontal position, it must no longer be possible to
move the Spring Arm upwards.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 64

Dismantling and re-mounting the securing segment Spring Arm - LCH17

The Figure shows a simplified illustration of the
Spring Arm [5] without light head.
The Light Head is kept in its position in the Spring
Arm by 1 securing segment. If the securing
segment is dismantled, there is a risk of the Light
Head sliding out of the Spring Arm, dropping and
causing severe injury;

 To dismantle the securing segment, route the Yoke

Pivot or Monitor Cradle out of the Spring Arm.

Moving the segment securing device

1. Unscrew the Phillips recessed head screw ③.

2. Push the segment securing device ② forwards until
the securing segment ① is accessible.

3. Slightly unscrew the optional brake screw

Dismantling the securing segment

4. While securely holding the Light Head, remove the
securing segment ① and route the Yoke Pivot out
of the Spring Arm. [5].

5. Check whether the securing segment ① achieves a
minimum thickness of 0.07” (1.8mm) and a minimum
length of 0.43” (10.9mm); otherwise, replace the
securing segment.

 Use a caliper gauge for measurement.
 Replace the securing segment ① if the specified

dimensions are not achieved.

Section 6

Mounting the securing segment

6. Lubricate the securing segment ① with white
grease.

7. Lubricate the pivot of the Yoke Pivot with white
grease.

8. Insert the Yoke Pivot into the Spring Arm and then
insert the securing segment ①.

9. Check that the securing segment ① is securely in
place;

 The Light Head/Yoke Assembly must rotate freely.

Moving the segment securing device

10. Re-tighten the optional brake screw.

11. Push the segment securing device ② backwards

and screw it on using 1 Phillips recessed head
screw ③.

Adjusting the vertical lift and the optional brake

12. Adjust the vertical lift of the Spring Arm and the

optional brake.

 Mount the cover panels to the Spring Arm.

Figure 43: Checking the securing segment

System Two LED Installation and Service Manual (1003385 Rev. C) Page 65

Checking the fixing screws on the Spring Arm - LCH17

The Figure shows a simplified illustration of the
Spring Arm without light head.

1. Dismantle the cover panels from the Spring Arm
LCH17/LCH19.

2. Check if the 2 Allen cylinder screws ① actually exist
on the front part and tighten them to 10Nm ± 0.5
Nm.

 Use an Allen key (size 5).

3. Mount the cover panels to the Spring Arm LCH17.

Checking the securing ring on the bottom
Extension Arm towards the spindle
The Figure shows a simplified illustration of the
Extension Arm without cables.

Dismantling the side panels from the Extension
Arm

1. Dismantle the cover panels from the Extension Arm.

Figure 44: Checking the fixing screws on the Spring Arm
LCH17

Dismantling the bottom cover panel

2. Unscrew the 3 cross recessed head screws ①
staggered 90° from the lower Extension Arm cover
panel by approximately 2 revolutions.

 Use a Torx T10 screwdriver.

3. Gently remove the bottom Extension Arm cover
panel ② from the Extension Arm towards the
bottom.

Section 6

Figure 45: Checking the securing ring on the bottom
Extension Arm towards the spindle

Checking the securing ring

4. Check the securing ring ③ on the bottom Extension
Arm towards the spindle;

 The securing ring ③ must be undamaged and

sealed.

Mounting the bottom cover panel

5. To re-mount the Extension Arm cover panel②,
proceed in reverse order.

6. Tighten the 3 cross recessed head screws ① only
manually.

 Use a Torx T10 screwdriver.

Mounting the side panels to the Extension Arm

7. Mount the cover panels to the Extension Arm.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 66

Lubricating the brake screws

Section 6

Lubricating the brake screws for the Extension Arm

1. Dismantle the cover panels from the Extension Arm.

2. Unscrew 2 brake screws. Lubricate the 2 brake screws with
white grease and screw them back in place.

3. Mount the cover panels to the Extension Arm.

Lubricating the brake screws for the Spring Arm

1. Dismantle the cover panels from the Extension Arm..

2. Unscrew 2 brake screws. Lubricate the 2 brake screws with
white grease and screw them back in place.

3. Adjust the 2 brake screws.

4. Mount the cover panels to the Extension Arm.

Lubricating the optional brake screw on the Spring Arm
L21/MD21

1. Dismantle the cover panels from the Spring Arm
L21/MD21.

2. Unscrew the brake screw. Lubricate it with white grease
and screw it back in place.

3. Adjust the brake screw.

4. Mount the cover panels to the Spring Arm L21/MD21.

Lubricating the optional brake screw on the Spring Arm
LCH17/LCH19

1. Dismantle the cover panels from the Spring Arm
LCH17/LCH19.

2. Unscrew the brake screw. Lubricate it with white grease
and screw it back in place.

3. Adjust the brake screw

4. Mount the cover panels to the Spring Arm LCH17/LCH19.

System Two LED Installation and Service Manual (1003385 Rev. C) Page 67

SPECIFICATION APPROVAL

Title

Signature

Date

President

VP Sales/Marketing

Operations Manager

Engineering Manager

Quality Assurance
Manager

REVISION HISTORY

Rev

Issue Date

Summary of Changes

Effectivity

Date

A

Initial Release

B

REVISION APPROVAL

Title

Signature

Date

Operations Manager

Engineering Manager

Quality Assurance
Manager

(Original Signature Copy on File)

System Two LED Installation and Service Manual (1003385 Rev. C) Page 68