Medclair MDU User manual

MDU - Mobile Destruction Unit
User’s manual
DU2100-M2 Revision: A5
2020-08-28

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Content
1. General 3
1.1. Definition 3
1.2. Overview 3
1.3. Safety information 4
2. Installation, service & daily care 5
2.1. Installation 5
2.2. Service 5
2.3. Daily care 5
3. Product overview 6
3.1. Front 6
3.2. Back 7
3.3. Dimension sketch 7
4. Preparation, start and shut down 8
4.1. Preparation 8
4.2. Start of the MDU 8
4.3. Shut down 9
5. Summary of possible indications 10
5.1. Indications for operationel status 10
5.2. Indications for fault status 12
6. Environment and recycling 13
6.1. Terms of Use 13
6.2. Worn-out equipment 13

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1. General
1.1. Definition
This document is a user’s manual for the mobile N2O destruction unit DU2100-M2.
For a technical overview see document ”Technical Brief DU2100-M2”.
When the acronym MDU is used within the document it refers to DU2100-M2.
1.2. Overview
The mobile unit MDU is a smart solution that can easily be moved anywhere where nitrous oxide is
needed for pain relief. This unit is a total solution for administrating nitrous oxide to the patient and
collecting residual nitrous oxide from exhaled air and destruct it. The MDU can easily be moved
between treatment rooms and is quiet, efficacious and reliable.
The mobile unit purifies more than 99 % of the nitrous oxide entering the unit. This facilitates a
healthy working environment for healthcare professionals and a minimal impact on the external
environment.
The MDU is specially adapted to suit the mobile needs of healthcare professionals allowing them to
use it in an easy and reliable manner. The unit accommodates a nitrous oxide cylinder (either pre-
mixed or concentrated) as well as an oxygen tube, and if needed an associated mixing unit (titration
unit. The latter is used to set different nitrous oxide concentrations, where varied treatment levels are
required.
The face mask with an accompanying tube for the administration of nitrous oxide is attached to the
unit, and a suction tube for exhalation is fitted using a standard connection to the MDU.
All required tubes, gas cylinders and valves are kept in the MDU, making it easy to transport as a
complete unit.
The MDU is constructed with few moving parts and components, which all have a high degree of
reliability and long product lifespan.
The MDU has an integrated control system that continuously monitors a number of parameters,
including temperature and gas flows, and stops automatically when overloaded. On delivery, the
device is already set up with an Ethernet connection for remote monitoring, and it is easy to connect a
modem to the unit for remote monitoring by MedClair’s technician.

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1.3. Safety information
The user’s manual shall always be available for users.
MDU may only be used by trained personnel.
Nitrous concentration of up to 70 % is allowed to be connected to the unit.
MDU is designed to be used for pain treatment.
MDU shall not be placed within reach for the patient.
MDU is only allowed to be used in environments where concentration of VOC (volatile organic
compound), is below 100 ppm and the concentration of halogenated hydrocarbons of the type
other anaesthesia gases is below 1 ppm.
Only approved gas tubes can be connected to the MDU.
To avoid the possibility for foreign object to come into the unit the incoming air/nitrous ports
shall always be connected to an exhaust tube or protected with the provided rubber cap.
Air supply towards the MDU is never allowed to be closed, if this is done the MDU will trigger a
Malfunction alarm.
The MDU is designed for having two demand valves connected (one for nitrous and one for
oxygen).
If only one demand valve is used the buffer tube (delivered with the MDU) shall be connected to
the free gas inlet to avoid that the demand valve is opened because of the negative pressure
generated.
Inside the chassis there is a risk for lethal voltage.
The chassis may only be opened by authorized personnel..
The MDU shall be sorted as electronic waste. Included battery, placed on the
circuit board, shall be sorted separately.
Read the completet user’s manual before use!

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2. Installation, service & daily care
2.1. Installation
As the MDU is an independent and movable unit there are no need for any installation. The unit is
ready for use after connection to 230V wall socket and applicable tubes for the N2O exhaust (and O2
exhaust when used).
2.2. Service
Contact Medclair in case of need for service.
During service a full check-up of the functionality as well as preventive actions like change of filter
and battery (if needed) will be performed.
2.3. Daily care
When needed the unit shall be cleaned using a light detergent.

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3. Product overview
3.1. Front
On the front there are two tube connection ports for exhaust air. Normally the exhaust air containing
N2O is connected to gas inlet #1 (blue) and exhaust air containing normal air only or O2to gas inlet
#2 (white). Technically there are no difference between the two ports since they are connected on the
inside. If only one port is used, the provided plug shall be connected to the port not used.
MDU is equipped with a handle and wheels to be easily moved (the front wheels are possible to lock
for a stable placement during treatment).
At the bottom of the unit there is an impact protection bumper to prohibit damages when hitting e.g. a
doorframe when moving the unit between wards.
Gas cylinders is placed at their intended place (Gas bottle stand) and shall be fixed with the flexible
bracket so they are securely anchored to the MDU. Different sizes of gas cylinders can be used.
MDU is provided with a washable operator panel with buttons for start (ON), stop (OFF), indications
for operating status and possible fault situations. See separate chapter in this manual for detailed
information of the use of the unit and explanation of the different indications on the panel.
Operator panel
Accessory attachments
Handle/
Protection rim
Flexible bracket
Gas bottle stand
Impact protection
Gas inlet #1
Gas inlet #2
Lockable wheel

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3.2. Back
On the back there is a drawer where user manual, plug and other miscellaneous items can be placed.
At the bottom of the unit there is a particle filter where the purified air is let out, this filter is changed
at the yearly service. In addition there is a separate exhaust for the air from the cooling system.
3.3. Dimension sketch
Below is the dimensions of the MDU in mm.
Storage box
230 V electrical
connection
Underneath: emission
of cooled and cleaned
air

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4. Preparation, start and shut down
4.1. Preparation
Use the handle to move the unit in position
Lock the wheels to avoid that the unit is unintentionally moved
Place the gas cylinder/cylinders on the unit and fix them to the unit with the straps
Connect exhaust tube/tubes to the unit (if only one tube is connected the connection not used
shall have the supplied rubber plug attached to avoid that foreign objects find its way in to the
unit).
NOTE: Demand valve, the MDU is designed for having two demand valves connected (one for
nitrous and one for oxygen).
If only one demand valve is used the buffer tube (delivered with the MDU) shall be connected to
the free gas inlet to avoid that the demand valve is opened because of the negative pressure
generated.
NOTE: When using the MDU together with a gas mixer there might be needed to connect an
exhaust tube to the free inlet, this tube will in this case act as a buffer.
Connect the unit to the wall socket 230 VAC.
The operator panel shall now indicate that the unit has electric connection, “Initiated” blinks
4.2. Start of the MDU
Press ”ON” button
”Initiated” is lit to indicate that the unit has started the heating phase (< 30 min)
”50%” is lit when the heating has reached half way (”Initiated” is turned off)
”READY” is lit when the unit is ready for use (”50%” is turned off)
NOTE: If the unit have been in operation recently there will be heat remaining in the unit and
therefore the indications ”50%” or ”READY” may be lit directly at start of the unit – this is the case
after a short move of a unit that have been in operation.
NOTE: The unit may never be started with caps on both its connections. “Malfunction” will in this
case be lit because of blockage of incoming air flow.

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4.3. Shut down
Press “OFF” button
The unit now starts the cooling phase and the ”READY” indication will blink for one minute
”Initiated” will blink to indicate that the power cord can be disconnected
NOTE: The unit will continue cooling down after that the power is disconnected
NOTE: If the unit has been used for N2O treatment it shall be left running for 5 minutes after
completed treatment to empty the unit from N2O residuals.

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5. Summary of possible indications
5.1. Indications for operationel status
Indication
Status/button pressed
Description
The unit is not connected to 230V
No indications
230V power connected to MDU
“Initiated”blinks with short
interval
”ON” button has been pressed and the
preheating phase has been started
”Initiated” is lit

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Indication
Status/button pressed
Description
The unit has reached 50% of the
operating temperature
”50 %” is lit
The unit has reached the operating
temperature and MDU is now ready
for use
”READY” is lit
”OFF” button has been pressed and
the cooling down phase has been
started
”READY” blinks
The power connection can be
disconnected without disturbing the
cooling down phase
”Initiated” blinks with short
interval

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5.2. Indications for fault status
MDU has a built-in control system to monitor temperatures and gas flows and the unit will stop
automatically in the case of problems.
Indication: ”Overheated” alternatively ”Malfunction” is indicated on the operator panel.
NOTE: Indication ”Malfunction” can be lit if caps are mounted on both the inlets due to blockage of
air flow.
If ”Overheated”is lit it means that too high temperature has been
reached within the catalytic reactor (this can happen when the unit has
been exposed with high load e.g. a concentration higher than 70%
nitrous has been connected to the unit).
The MDU will rectify this automatically i.e. heating will be stopped and
the MDU starts up again when the temperature has fallen below the
limit.
If the fault indication hasn’t disappeared after 30 minutes, contact
Medclair.
If ”Malfunction” is lit perform the following steps:
Step 1: Restart the unit by disconnecting the power cord.
Wait 15 minutes
Step 2: Connect the power cord
The indication should now show that power is connected by
a blinking ”Initiated” indication.
Step 3: Press ”ON”
The heating phase will now start.
If the fault indication remains, contact Medclair.

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6. Environment and recycling
6.1. Terms of Use
MDU shall only be used in controlled inhouse environment with for the operation approved
ventilation.
6.2. Worn-out equipment
When worn-out the equipment will be taken back by MedClair for dismantling and then left for
recycling.
Battery, DU2100-M2 contains a lithium battery which shall be left for battery recycling.
Electric components, to be dismanteled and left as electronic waste
Catalytic mass, will be send back to the supplier for recovery of metal components
Mechanics, divided into platis and metall and then sent for recycling.

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