Page 1
Dear doctor,
We thank you for your confidence demonstrated by the purchase of this MELAG product.
As an owner-run and operated family concern founded in 1951, we have a long history of successful specialization in
hygiene products for practice-based use. Our focus on innovation, quality and the highest standards of operational
reliability has established MELAG as the world’s leading manufacturer in the instrument treatment and hygiene field.
You, our customer are justified in your demand for the best products, quality and reliability. Providing “compet ence in
hygiene” and “Quality – made in Germany”, we guarantee that these demands will be met. Our certified quality
management system is subject to close monitoring: one instrument to this end is our annual multi-day audit conducted in
accordance with ISO 13485. This guarantees that all MELAG products are manufactured and tested in accordance with
strict quality criteria.
The MELAG management and team.
Operating Manual
MELAdem® 56
Reverse osmosis unit
EN
Page 2
General guidelines
The operating manual includes important safety information. Please read this operating manual carefully before
commissioning the device. The functionality and value-retention of this device depend primarily on the care accorded to
it.
Please store this operati ng ma nual carefully and in close proximity to the device. It represents a component of the
product.
User group
This operating manual is addressed to doctors, their assistants and service departments.
Validity
This operating manual applies to the reverse osmosis unit MELAdem 56.
About this manual
Symbols used
Symbol
Explanation
Draws your attention to a situation, which if not avoided, can result in damage to the
instruments, the practice fittings or the device.
Draws your attention to important information.
Formatting rules
Symbol
Explanation
see Chapter 2
Reference to another text section within this document.
Scope of delivery
Standard scope of delivery
1x MELAdem 56 reverse osmosis unit
1x Pressure tank
1x Connection set for MELAdem 56
1x Operating manual
1x Record of installation and setup
Spare parts
Spare Parts
Art. no.
Fine filter
37450
Activated carbon filter
37460
Mixed-bed resin cartridge
37470
Osmosis module
37483
Grease for dirt filter
24521
Grease for seal filter housing
24371
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Contents
Contents
Scope of delivery ............................................................................................................................................................. ii
Spare parts ...................................................................................................................................................................... ii
Chapter 1 – Device description ....................................................................................................... 5
Intended Use ................................................................................................................................................................... 5
Mode of functioning ......................................................................................................................................................... 5
Structure of the reverse osmosis unit .............................................................................................................................. 6
Chapter 2 – Installation ................................................................................................................... 8
Requirements of the installation location ......................................................................................................................... 8
Space requirements......................................................................................................................................................... 8
Installation ....................................................................................................................................................................... 8
Chapter 3 – Commissioning .......................................................................................................... 10
Checking the operational readines s ............................................................................................................................... 10
Chapter 4 – Maintenance .............................................................................................................. 12
Regular checks and maintenance ................................................................................................................................. 12
Replacing the fine filter (pre-filter) .................................................................................................................................. 12
Replacing the activated carbon filter .............................................................................................................................. 13
Replacing the mixed-bed resin cartridge ....................................................................................................................... 14
Cleaning the filter insert in the dirt filter.......................................................................................................................... 15
Operating pauses .......................................................................................................................................................... 15
Technical Data .............................................................................................................................. 16
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Chapter 1 – Device description
4
Safety Instructions
When operating the reverse osmosis unit, please observe the following safety instructions as well as those
contained in subsequent chapters.
Maintenance
Use only original replacement parts for maintena nc e.
Leaks
Close the water intake upon detecting a leak. Check all hoses and hose connections for leaks.
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Chapter 1 – Device description
5
Chapter 1 – Device description
Intended Use
The reverse osmosis unit is used to prod uce de-mineralized water and functions according to the reverse
osmosis principle. This process presses water through a semi-permeable RO membrane (osmosis
module) where the salt content of the cold water is reduced by some 95 %.
The inflowing water is separated into two flows:
a) water with a low salt content (permeate).
b) water with increased levels of salt (concentrate) which is disposed of into the effluent system.
Mode of functioning
An ion exchanger is connected to the reverse osmosis unit to achieve the level of water quality necessary
for operation of the Cliniclave 45/Cliniclave 45 D, even with poor quality cold water. The ion exchanger is
filled with a mixed-bed resin. The ion exchanger is able to reduce the residual salt content of the permeate
to a minimum. The produced permeate is saved in a pressure tank, which is conne cted to the steam
sterilizer via a hose. When the pressure tank is filled, the pump and so the cold water supply is
deactivated. All operating runs in the reverse osmosis unit are automatically controlled via the water
pressure.
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Chapter 1 – Device description
6
Structure of the reverse osmosis unit
Fig. 1: Reverse osmosis unit MELAdem 56 with pressure tank
Item
Designation
Explanation
1
Pressure switch
Controls the current flow to the pump. Prevents e.g. a too high
pressure increase in the pressure tank.
2
Dirt filter
Filters the water to protect the pump.
3
Osmosis module
Represents the core of the reverse osmosis unit. The RO
membrane separates the cold water into two flows: the permeate
(pure water) and concentrate (waste water).
4
Connection for the
concentrate line
(Ø 6/4 mm)
The concentrate is fed into the effluent systems by the waste
water line (length: 0.7 m) over the steam sterilizer.
5
Cold water connection
(Ø 8/6 mm)
The reverse osmosis unit is supplied with cold water (cold water)
from the steam sterilizer via the cold water line.
6
Valve
For measuring resp. setting the primary pressure in the pressure
tank.
7
Pressure tank
The permeate is collected here. The steam steriliz er is sup pl ied
with feed water from the pressure tank.
8
Shut-off valve
For closing the pressure tank.
9
Feed water hose to the
steam sterilizer
(Ø 10/8 mm)
Supplies the steam sterilizer with feed water from the pressure
tank.
10
Connection at the
pressure tank
The permeate line (Ø 6/4 mm, length: 1 m) connects the ion
exchanger with the pressure tank. Supplies the steam sterilizer
with fresh feed water.
11
Manometer
Displays the current feed water pressure in the pressure tank.
12
Connection at the ion
exchanger
Connection for the permeate line (Ø 6/4 mm, length: 1 m) from th e
pressure tank at the ion exchanger.
13
Ion exchanger
Performs the demineralization of the water from the osmosis
module.
14
Activated carbon filter
Removes free chlorine, which can destroy the membra ne of t he
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Chapter 1 – Device description
7
reverse osmosis unit.
15
Pre-filter
The pre-filter filter holds back all parti culat e mater ial , ru st and
other soiling.
16
Pump
Generates the necessary water pressure.
17
Power supply
Supplies the pump with current.
18
Power connector
Supplies the power supply with current.
PLEASE NOTE
The corresponding connections are located at the underside of the Cliniclave 45/Cliniclave 45 D.
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Chapter 2 – Installation
8
Chapter 2 – Installation
Requirements of the instal lation location
The following requirements must be fulfilled:
The installation location is dry and frost-free.
The installation location is accessible for the installation, operation and regular replacement of the
filter.
The hose connections are freely accessibl e.
Space requirements
The water treatment unit should preferably be stored in the optionally available
Cliniclave 45/Cliniclave 45 D floor unit. If the steam sterilizer is to be set up without the floor unit, an area
of 52x20x50 cm (WxDxH) should be designated for the reverse osmosis unit. An area of 35x50x35 cm
(WxDxH) is required for the pressure tank. Suffici ent spa ce s hould be guar ante ed permi tt ing free access to
the steam sterilizer hose s and cabl es to the reverse osmosis unit and for replacement of the filter.
Installation
In order to connect the reverse osmosis unit, proceed as follows:
1. Switch off the steam sterilizer at the power switch.
2. Loosen the screws from the cover of the osmosis module and pull the cover upwards. Proceed
with caution.
3. Remove the caps from the steam sterilizer connections and the reverse osmosis unit and stor e
them safely. They could be required for transport or decommissioning.
4. Connect the feed water line, the waste water line (0.7 m) and the cold water line to the
corresponding connections of the steam sterilizer floor tank (Fig. 2, pos. 8, 9 and 10).
5. Secure the MELAdem 56 to the screws at the spacers on the rear panel of the floor unit.
6. Connect the waste water line (0.7 m) and the cold water line with the corresponding connections
on the MELAdem 56 (Fig. 1, pos. 4 and 5).
7. Connect the permeate line (1.0 m) to the MELAdem 56 (Fig. 1, pos. 12).
8. Using the manometer included in the scope of delivery, set the pressure tank primary pressure on
the valve on the side of the container at 0.6 bar. Should the primary pressure of an empty
pressure tank exceed 0.6 bar, reduce the pressure by pressing in the valve tappet. Following
insufficient pressure, this pressure must be increased using e.g. a foot pump.
9. Connect the feed water line to the pressure tank (Fig. 1, pos. 9).
WARNING
The hoses may not be allowed to suffer kinking or crushing.
10. Connect the reverse osmosis unit power connector to the steam sterilizer power connection in the
floor tank and then connect the safety latch.
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Chapter 2 – Installation
9
Fig. 2: Installation of the reverse osmosis unit MELAdem®56 in the Cliniclave 45 floor unit
1. Steam sterilizer floor unit, here Cliniclave 45
2. Power connector
3. Feed water line
4. Shut-off valve
5. Pump
6. Pressure tank of the MELAdem 56
7. Osmosis module
8. Feed water connection
9. Waste water connection
10. Cold water connection
DANGER
When the steam sterilizer is switched on, a voltage of 230 V is found on the power
connection from the reverse osmosis unit to the Cliniclave 45/Cliniclave 45 D.
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Chapter 3 – Commissioning
10
Chapter 3 – Commissioning
Following careful installation, the reverse osmosis unit can be commissioned in accordance with the
following points:
1. Unscrew the filter housing of the ion exchanger (Fig. 1, pos. 13).
2. Remove the mixed-bed resin cartridge and screw on the empty filter housing to flush the reverse
osmosis unit.
3. Place and hold the free end of the permeate line in a 5 l container or similar.
4. Switch on the steam sterilizer at the power switch.
5. Operate the reverse osmosis unit for c. 20 minutes in order to remove all preservative and dust
residue.
6. Switch off the steam sterilizer.
7. Unscrew the filter housing of the ion exchanger.
PLEASE NOTE
The filter housing is full to the brim with water.
8. Remove the water of the filter hous ing.
9. Return the mixed-bed resin cartridge in accordance with Chapter 4 - Maintenance, Replacing
the mixed-bed resin cartridge and screw-on the filter housing again.
10. Connect the permeate line to the pressure tank (Fig. 1, pos. 10).
11. Close the pressure tank shut-off valve.
12. Place the pressure tank in the floor unit (see Fig. 2).
13. Switch on the steam sterilizer.
14. Check whether the reverse osmosis unit and the hose connections are free from leaks.
15. Open the pressure tank shut-off valve completely.
16. The first filling of the pressure tank lasts 2-2.5 hours. When the warming Feed water
pressure low disappears on the steam sterilizer display a progr a m can be starte d.
17. Mount the cover of the osmosis module.
The water treatment unit now works fully-automatically.
Checking the operational readiness
Operating pressure
Perform a daily check of the pressure on the pressure tank manometer before first program start.
Fig. 3: Lateral view of the MELAdem 56 pressure tank
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Chapter 3 – Commissioning
11
Pressure in the
pressure tank
(blue indicator)
Meaning
Measure
3-4 bar
Recommended operating pr es sure; in
general the pressure tank is still
sufficiently full from the previous day.
----
< 2.5 bar
Little feed water in the pressure tank
Leave the steam sterilizer switched on
so that the reverse osmosis unit can
operate.
< 1 bar
No or insufficient feed water in the
pressure tank
Leave the steam sterilizer switched on
so that the reverse osmosis unit can
operate. A warning or malfunction
message will be displayed.
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Chapter 4 – Maintenance
12
Chapter 4 – Maintenance
Regular checks and maintenance
Interval/time
Check/cleaning
Daily
Measure the permeate conductivity with a conductivity sensor or with a
MELAG steam sterilizer, via the integrated test program "conductivity
measurement".
Check the pressure in the pressure tank via the inbuilt manometer.
12 months
Check hoses and screw connections for leaks, crushing or kinks.
12 months
Check the primary pressure of the empty pressure tank.
12 months
Clean the filter insert of the dirt filter.
12 months
Replace the fine filter (pre-filter).
12 months
Replace the activated carbon filter.
12 months
Maintenance by a service technician.
where needed
(with bad conductivity)
Replace the mixed-bed cartridge in the ion exchanger and then measure the
conductivity of the permeate.
The reverse osmosis unit requires maintenance every 12 months together with the steam sterilizer. This is
to be performed by a service technician who has been trained for this task. The maintenance manual for
the reverse osmosis unit can be found in the maintenance instructions of the steam sterilizer.
Poor local water quality requires bi-annual maintenance of the reverse osmosis unit in accordance with the
section Regular checks and mainten ance .
WARNING
Regular replacement of the filter cartridge is required in order to maintain the life-expectancy of
the osmosis module.
Replacing the fine filter ( pre -filter)
Replace the cartridge of the mechanical fine filter (pre-filter) once a year. Given a higher degree of turbidity
in the cold water (higher pressure loss), perform this as often as necessary.
1. Switch off the steam sterilizer and close the
pressure tank shut-off valve.
2. Unscrew the filter housing (a) from the filter
body (b) using the filter key. Guide the filter
key upwards from below over the filter
housing and turn the filter key in a clockwise
direction.
PLEASE NOTE
The filter housing is full to the brim with
water. Remove the water.
3. Remove the fine filter cartridge (1) and flush
the filter housing with tap water.
4. Remove the sealing ring from the filter housing (a).
5. Clean and grease the sealing ring lightly with silicone grease (art. no. 24371).
6. Insert the new fine filter cartridge in the filter housing.
7. Screw on the filter housing lightly with the filter key.
b
1
a
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Chapter 4 – Maintenance
13
8. Switch on the steam sterilizer and open the pressure tank shut-off valve.
9. Check whether all the parts are secure and that the reverse osmosis unit is free from lea ks.
Replacing the activated carbon filter
Replace the cartridge of the activated carbon filter once a year or when replacing the fine filter.
1. Switch off the steam sterilizer and close the
pressure tank shut-off valve.
2. Unscrew the filter housing (a) from the filter
body (b) using the filter key. Guide the filter
key upwards from below over the filter
housing and turn the filter key in a clockwise
direction.
WARNING
The filter housing is full to the brim with
water. Remove the water.
3. Remove the activated carbon filter (1) and
rinse the filter housing with tap water.
4. Remove the sealing ring from the filter housing (a).
5. Clean and grease the sealing ring lightly with sil icone gr ea se (art . no. 24371).
6. Insert the new activated carbon filter in the filter housing.
7. Screw on the filter housing lightly using the filter key.
8. Switch on the steam sterilizer and open the pressure tank shut-off valve.
9. Check whether all the parts are secure and that the reverse osmosis unit is free from leaks.
b
1
a
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Chapter 4 – Maintenance
14
Replacing the mixed-bed resin car t ridge
If the mixed-bed resin quality is exhausted (poor permeate quality), replace the mix ed-bed resin cartr idg e.
Check the permeate conductivity after every replacement of the mixed-bed resin cartridge.
1. Switch off the steam sterilizer and close the
pressure tank shut-off valve.
2. Unscrew the filter housing (a) from the filter
body (b) using the filter key. Guide the filter key
upwards from below over the filter housing and
turn the filter key in a clockwise direction.
WARNING
The filter housing is full to the brim with water.
Remove the water.
3. Remove and replace the mixed-bed resin
cartridge (1).
4. When inserting a new cartridge, please ensure that the flat seal of the mixed-bed resin cartridge
(1) points upwards (see arrow).
5. Remove the sealing ring from the filter housing (a).
6. Clean and grease the sealing ring lightly with silic one grea se ( art. no. 24371) .
7. Replace the mixed-bed resin cartridge (1) in the filter housing.
8. Screw on the filter housing lightly using the filter key.
Remove the permeate line on the pressure tank (Fig. 1, pos. 10).
9. Switch on the steam sterilizer.
10. Collect the outflowing water of the filter housing for 5 minutes in a cup.
11. Switch off the steam sterilizer.
12. Determine the conductivity of the water (˂ 5 µS/cm).
13. Connect the permeate line to the pressure tank.
14. Switch on the steam sterilizer and open the pressure tank shut-off valve.
15. Check whether all the parts are secure and that the reverse osmosis unit is free from leaks.
1
b
a
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Chapter 4 – Maintenance
15
Cleaning the filter insert in the dirt filter
Clean the filter insert of the dirt filter once a year or when replacing the fine filter or the activated carbon
filter. Replace the filter insert where necessary:
1. Switch off the steam sterilizer and close the pressure tank shut-
off valve.
2. Remove the cover of the osmosis module.
3. Remove the dirt filter from the bracket. Loo sen both hose screw
connections (1a and 1b).
4. Open the filter housing (3 and 5).
5. Remove the filter insert (4) and the sealing ring (2) from the filter
housing.
6. Check the filter housing (3 and 5) for soiling and rinse out if
necessary.
7. Insert the filter insert (4) and sealing ring (2). Replace a worn
sealing ring.
8. Grease the seal face on the lower filter housing (5) with the
corresponding grease (art. no. 24521).
9. Screw on the filter housing (3 and 5).
10. Connect the dirt filter to the hoses and tight en the hos e
connection screws (1a and 1b). Ensure that the arrow points in
the flow direction of the pump.
11. Place the dirt filter in the bracket.
12. Switch on the steam sterilizer and open the pressure tank shut-off
valve.
13. Check whether all the parts are secure and that the reverse osmosis unit is free from lea ks.
14. Replace the cover of the osmosis module.
Operating pauses
Perform the following checks after operating pau ses (dep end ing on the duration):
Duration of the
operating pause
Check:
up to 4 weeks
Empty pressure tank.
after 4 weeks
Replace the fine filter, activated carbon filter and mixed-bed resin cartridge,
empty the pressure tank and rinse the reverse osmosis unit and pressure
tank before recommissioning.
after 2 months
Disinfect the reverse osmosis unit. Please contact the MELAG customer
service or service of the specialist trade.
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Technical Data
16
Technical Data
Model name
MELAdem 56
Dimensions (HxWxD)
44.4 x 50 x 17.3 cm
Dimensions pressure tank (HxØ)
c. 44 x 30.5 cm
Total weight (with filters and
pressure tank)
c. 18 kg
Volume (pressure tank)
c. 13 litres
Permeate production
max. 380 litres/day (value at 25 °C)
Yield
c. 20 % until 25 %
Conductivity of the pure water
(permeate)
- c. 20 µS/cm until 30 µS/cm at 600 µS cold water
- c. < 1 µS/cm at 600 µS cold water and non-exhausted ion
exchanger
Retention RO
Nominal salt retention c. 95 %
Membrane
TFC bacteria resistant, coil module
Pre-filter I
Particle fine filter 10“, 5 µm
Pre-filter II
Activated carbon 10“
Afterfilter I
Ion exchanger, contents c. 0.7 litres
Cold water
Tap water of drinking water quality
Max. iron content of the cold water
0.1 mg/l
Max. salt content of the cold water
1500 mg/l
Water temperature min/max.
5 °C until 35 °C
Water PH value min/max.
4.0 until 10.0
Electrical connection
230 V/50 Hz
0.2 A
Max. electrical power
40 W
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MELAG Medizintechnik oHG
Geneststraße 6-10
10829 Berlin
Germany
E-Mail: info@melag.de
Web: www.melag.com
Responsible for content: Technical Office
Subject to technical alterations
BA_dem56_11056_en_v4.docx Rev.: 4 – 18/1683 | Revision date: 2018-08-28
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