Lauda PD 2, PD 4 User guide

Operating Instructions

Puridest Mono Distillation Apparatus
PD 2, PD 4

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LAUDA Puridest Mono Distillation Apparatus models PD 2 and PD 4 produce distillate of good quality with a low conduc­tivity (approx. 2.3 µS / cm at 25 °C), dependent on quality and composition of the feed water.

Before installation, please check whether contents of package are in good order and complete.
Should you note any damages or have any reasons for complaint, please contact your supplier or directly:

LAUDA-GFL Gesellschaft für Labortechnik mbH

Schulze-Delitzsch-Str. 4+5

30938 Burgwedel - Germany

Telefon: [phone]

Fax: [phone]

E-Mail:[e-mail]

Internet: www.gfl.de

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Contents

Operating Instructions ................................................................................................................................................................... 1

1 Use of the Distillation Apparatus .......................................................................................................................................... 7

1.1

1.2

2 Warranty ................................................................................................................................................................................ 7

3 Before Initiation ..................................................................................................................................................................... 8

4 Set-up and Location of the Distillation Apparatus ............................................................................................................... 8

5 Operating Voltage ................................................................................................................................................................. 8

6 Water Connections ................................................................................................................................................................ 9

6.1

6.2

6.3

7 Initiation and Setting of the Cooling Water Temperature ................................................................................................. 10

7.1

7.2

7.3

8 Functional Description ....................................................................................................................................................... 11

9 Maintenance, Service and Removal of Malfunctions ......................................................................................................... 11

Intended Use ................................................................................................................................................................................... 7

Improper Use .................................................................................................................................................................................. 7

Tap water inlet (ill. A) ..................................................................................................................................................................... 9

Cooling water outlet (ill. B) ........................................................................................................................................................... 9

Destillate Outlet ............................................................................................................................................................................. 9

Control Thermometer (ill. C) .....................................................................................................................................................10

Water inlet and Setting the Cooling Water Temperature (ill. D and E) .............................................................................10

Degassing and Distillate Withdrawal (ill. F) .............................................................................................................................10

9.1

9.2

9.3

10 Disposal of Old Units.......................................................................................................................................................... 12

11 Technical Data .................................................................................................................................................................... 13

12 Circuit diagram ................................................................................................................................................................... 14

12.1

12.2

13 Connection to the mains supply ......................................................................................................................................... 15

13.1

13.2

14 List of spare parts ................................................................................................................................................................ 17

15 Accessories .......................................................................................................................................................................... 18

Descaling........................................................................................................................................................................................11

Cleaning .........................................................................................................................................................................................12

Re-Initiation after Low Water ....................................................................................................................................................12

Circuit diagram PD 2 ..................................................................................................................................................................14

Circuit diagram PD 4 ..................................................................................................................................................................14

Electrical fuses ..............................................................................................................................................................................15

Examples for connection to the mains supply .........................................................................................................................16

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1 Use of the Distillation Apparatus

1.1

In LAUDA Puridest Mono Distillation Apparatus PD 2 and PD 4, an electric heating element serves to boil water and
transform it to steam. The steam is led into the condenser that is placed on the boiler and condenses on the cooling coil.
The produced distillate drains through a drain tube on the front of the condenser. Depending on the model, the distillate
quantity is 2 litres (PD 2) or 4 litres (PD 4).

Depending on the tap water quality, the produced distillate has a conductivity of approx. 2.3 µS / cm at 25 °C. To feed
the Distillation Apparatus, preferably use tap water of drinking quality. Please also observe the information in chapters 15
of these instructions on the possible use of filters and cartridges to pretreat the tap water.

Intended Use

The Distillation Apparatus must be operated within the user's field of vision.

The information contained in these operating instructions must by all means be read and observed. Only
then a perfect operation of the Distillation Apparatus can be guaranteed. The units may only be installed
and operated by persons who have made themselves familiar with these operating instructions.

Caution:
Both the outer housing of the boiler and the steam condenser get strongly heated up during operation.
Both parts may only be touched after they have cooled down, or when using suitable safety gloves.

1.2

LAUDA Puridest Mono Distillation Apparatus, operated in a laboratory, are no Medical Devices. They fall neither under
national nor international Medical Device Directives and have to be used and applied accordingly. The Distillation Appa­ratus may not be used in potentially explosive surroundings. The Distillation Apparatus may neither be set up nor operated
in laboratory areas with aggressive or corrosive ambient conditions.

Improper Use

2 Warranty

For all laboratory apparatus and their accessories from LAUDA-GFL Gesellschaft für Labortechnik mbH, there is a war­ranty claim, as well for spare parts, repairs and modifications, carried out by LAUDA-GFL. In order to identify defective
units, we require both model and serial number on the nameplate, left-hand side of the Distillation Apparatus and, if appli­cable, a copy of the invoice.

3 Before Initiation

Important information are marked in bold letters in these instructions, safety indications are additionally marked by the
following warning symbols and mandatory signs.

Read and observe the
operating instructions

Warning of hot liquids
and vapour

Warning of dangerous
electrical voltage

Warning of hot surfaces

General warning Before maintenance and repair

4 Set-up and Location of the Distillation Apparatus

All free openings of the water connections on the right-hand side of the unit are taped close. These
transport protections have to be removed before installation. Place on solid, even and level surfaces
inside buildings only. Make sure to place the unit only on a watertight, temperature-resistant, non­flammable surface. The location must provide sufficient space as well as the necessary carrying capacity
for the unit (unit weight as per technical data, chapter 11 of this manual, plus weight of the filling. The
unit is not suitable for use in potentially explosive areas.

5 Operating Voltage

disconnect the unit all-pole from
the electrical mains (pull the plug
from the socket).

The Distillation Apparatus must be connected to the mains through a correctly installed shock-proof
socket or through an on-site main switch. The Distillation Apparatus is a protection class I electrical
appliance, a connection to the earth conductor (PE) must be ensured. For information on the required
mains fuse please view Technical Data 11 of this manual.

The electrical connection must ensure an all-pole separation of the Distillation Apparatus from the
mains at any time. The mains connection cable must not touch any hot surfaces of the unit. It may not
lead underneath the unit. The main switch of the unit must be off (position O). The voltage on the
nameplate (at the back of the unit) must be identical to the mains voltage. If they are identical, connect
the unit to the mains. For further information, please also refer to chapter 13 of these operating in­structions "Connection to the Mains Supply".

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6 Water Connections

All water connections of the Distillation Apparatus, with the exception of the distillate withdrawal at the front, are located
at the right-hand side of the unit. Hoses for water inlet and outlet are not included in the standard scope of supply.

6.1

Water is fed to the Distillation Apparatus through the tap water inlet. Connect a ½" pressure hose between the tap for
cooling water inlet and an on-site manual stop valve of the mains water supply. Make sure to secure both hose connections
with hose clips!

6.2

Connect a ½" temperature-resistant hose with a maximum length of 1.5 m to the cooling water outlet. The hose must
lead into a drain on a lower level and must have a slope on its complete length. Make sure the cooling water can drain with­out back draughts.

6.3

Use a temperature-resistant hose (not depicted) to connect the distillate outlet tube on the front of the condenser with a
storage tank (to be provided on-site). When choosing the storage tank, observe the special storage conditions for distilled
water according to your requirements as well as the high temperature of freshly produced distillate.

Tap water inlet (ill. A)

Cooling water outlet (ill. B)

Caution:
The cooling water leaves the Distillation Apparatus with a temperature up to 70 °C.
Danger of scaldings!

Destillate Outlet

Caution:
Distilled water leaves the Distillation Apparatus with a temperature up to 100 °C.
Danger of scaldings!

7 Initiation and Setting of the Cooling Water Temperature

Lift the condenser from the boiler (ill. E, upwards arrow) and fill in water until the heating element in the boiler is com­pletely covered by water.

7.1

Insert the supplied thermometer into the tube support on the right-hand of the upper part.

7.2

Open the tap of the cooling water supply on the unit completely (handle in the direction of water flow), and the on-site
stop valve of the mains water supply a little. Check the power supply and switch on the main switch. The pilot lamp in the
main switch lights up. As soon as the water in the boiler reaches boiling point, regulate the cooling water supply on the tap
of the mains water supply so as to set the temperature of the draining cooling water to approx. 60 °C to 70 °C. The tem­perature can be checked with the inserted thermometer. The Distillation Apparatus achieves its maximum efficiency with a
cooling water temperature of 60 °C to 70 °C.

7.3

Control Thermometer (ill. C)

Water inlet and Setting the Cooling Water Temperature (ill. D and E)

Degassing and Distillate Withdrawal (ill. F)

Carbon dioxide that forms during the distillation process, is released through a vent in the condenser. Produced distillate is
to be led through a hose (not shown) from the drain tube into a storage tank.

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8 Functional Description

The tap water flows through the cooling coil in the condenser to the water level regulator on the right-hand side of the
unit. The mechanical water level regulator determines the water level in the boiler so as to ensure that the heating element
is constantly kept below water level. Water that is not used for evaporation flows off through the cooling water outlet.
When the heating element is switched on, it brings the water in the alembic to the boil. A thermostatic low water cut-off
protects the heating element from running dry. The produced steam is led into the condenser, condenses on the cooling
coil and drips off as distillate through the drain tube on the front. By setting the temperature of the cooling water between
60 °C and 70 °C, to be checked with the inserted thermometer, the unit's efficiency and the produced quantity of distil­late is optimised.

9 Maintenance, Service and Removal of Malfunctions

Caution:
Before servicing the unit let the Distillation Apparatus cool down!
Danger of burns!

Caution:
Before opening the Distillation Apparatus as well as before cleaning procedures, discon­nect the unit from the mains! (Unplug the unit or switch off the main switch).
Danger of electrical shock!

9.1

Pour the scale-solvent mix from the boiler after approx. 30 minutes and then rinse the boiler thoroughly with tap water.
Commercial descaling agents, suitable for use with stainless steel, can also be used according to the manufacturer's in­structions (e. g. rea-calc® of M/s CHEMOTEC GmbH, 63486 Bruchköbel, Germany). Never use any products con­taining hydrochloric acid! These will lead to damages to heating element, boiler, temperature sensor and the ducts of the
screw connections. Restart the unit as described in chapter 7. After descalings, the first few litres of distillate should not
be used as it might contain traces of evaporated descaling agent.

Descaling

Depending on the hardness of the tap water, the Distillation Apparatus must be
cleaned from scale formations in regular intervals. To do so, close the on-site
water supply valve and lift the condenser from the boiler. A suitable descaling
agent is a mixture of 10 % formic acid, 10 % acetic acid and 80 % distilled water.
Fill the solvent into the boiler until it covers the topmost scale deposits and heat
up to maximum approx. 70 °C. Make absolutely certain not to bring the mixture
to a boil.

9.2

Depending on the degree of impurities in the feed water and the growing contamination of the water in the boiler, caused
by the distilling process itself, the boiling process will cause foam formation. To prevent these impurities from migrating
into the pure water area of the condenser, the water in the boiler must be exchanged at least twice a week. To do so, close
the on-site water inlet valve and lift the condenser from the boiler. Then empty the contents from the boiler and rinse
thoroughly with tap water.
Restart the unit as described in chapter 7.
The "Cleaning" procedure serves to exchange contaminated water in the boiler against clean water.

Cleaning

9.3

The LAUDA Puridest Distillation Apparatus is produced with first-class materials. Nevertheless, the unit should only be
subjected to mechanical strain in sensible limits. Make sure that no fluids come into contact with cable connections or the
electrical parts inside the unit!
The powder-coated surfaces of the unit can be cleaned with mild detergents, if necessary.

Servicings, repairs or modifications must be carried out according to the General Engineering by a competent electrician.

Only original spare parts must be used. Always demand a detailed confirmation by the person in charge (company, date,
signature) on the kind and volume of the tasks carried out.

Re-Initiation after Low Water

In case of low water, the Distillation Apparatus temperature limiter will switch off the unit. In order
to restart, allow the unit to cool down and, as described in chapter 7, fill water into the boiler until
the heating element is below water level. The triggered low water cut-off must be released. To do
so, loosen the black cap nut at the right-hand bottom of the Distillation Apparatus. Inside the
thread, a small white plastic pin can be seen, that has to be gently pressed inside (e. g. with a pen)
until a clicking sound can be heard.

10 Disposal of Old Units

LAUDA-GFL will take responsibility, within the scope of the legal directives, for an environmentally sound handling and
disposal of all used LAUDA-GFL units as of the production year 1995 that are returned to us free of charge and will have
it materially recycled. Before the unit is returned, a legally binding declaration must be provided from the sender, confirm­ing that the unit is free from harmful and/or hazardous contaminations as well as from hazardous substances caused by the
previous use of the unit. LAUDA-GFL laboratory apparatus are exclusively designed for industrial use and may not be
disposed of through public waste disposal authorities.
EAR Registration Number WEEE-ID.NO.DE 67770231

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11 Technical Data

PD 2 PD 4

Exterior dimensions (W x D x H) 270 mm x 250 mm x 510 mm 270 mm x 250 mm x 510 mm

Destillation capacity 2 l / h destillate 4 l / h destillate

Destillate quality Mono destillate

approx. 2.3 µS / cm at 25 °C

The conductivity of the distilled water is directly related to the chemical composition of the feed water. Components of the feed water having the same
of a lower evaporation point than water may deteriorate the conductivity.

Cooling water requirement 20 l / h 40 l / h

Low water cut-off (thermostat) Electromechanical temperature limiter, with

capillary tube sensor.
Switch-off temperature 135 °C / -15 K

Required cooling water pressure 1-2 bar

14.5 psi / 29.0 psi

Electrical connection /
Mains connection

Caution! Mains voltage deviations, even within the mentioned limits, influence the quantity of distillate produced!

Mains fuse
On-site
Internal

230 V +/-10 %,
50 / 60 Hz, 2.0 kW
Schuko plug CEE 7/7

10 Amp. (max. 16 A)
10 Amp. inert

Mono destillate
approx. 2.3 µS / cm at 25 °C

Electromechanical temperature limiter, with
capillary tube sensor.
Switch-off temperature 135 °C / -15 K

1-2 bar

14.5 psi / 29.0 psi

230 V +/-10 %,
50 / 60 Hz, 3.0 kW
Schuko plug CEE 7/7

16 Amp.
15 Amp. inert

Protection class / - type I / IP20 I / IP20

Surrounding conditions Use only inside buildings (not in potentially

explosive areas).

Height above MSL up to 2000 m MSL up to 2000 m MSL

Ambient temperature +10 °C to +40 °C +10 °C to +40 °C

Humidity max. 80 % rel. humidity to 31 °C, decreasing

to 40 % rel. humidity at 40 °C

Net weight 7.7 kg 8.0 kg

Weight with water filling 12.2 kg 12.5 kg

Use only inside buildings (not in potentially
explosive areas).

max. 80 % rel. humidity to 31 °C, decreasing
to 40 % rel. humidity at 40 °C

12 Circuit diagram

E1 Tubular heating element
F1 Fuse 10 Amp. inert (PD 2)
Fuse 15 Amp. inert (PD 4)
F2 Fuse 10 Amp. inert (PD 2)
Fuse 16 Amp. inert (PD 4)
F3 Low water cut-off (thermostat)
K1 Contactor (PD 4)
S1 Main switch

12.1

12.2

Circuit diagram PD 2

Circuit diagram PD 4

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13 Connection to the mains supply

Colour coding of the mains cable

Mains supply

ge/gr

–

yellow

/

green

PE (

Protective earth

)

bl–blue

N

sw–black

L1

Model

Power

Power consumption at mains voltage

*

Mains

fuse (F4, F5)

PD 2

2.0 kW

8.

7 Aat230V10 A

mp

PD 4

3.0kW13.

0 Aat230V16 A

mp

Distillation Apparatus models PD 2 and PD 4 are supplied with a pre-assembled, cast-on shock-proof plug (CEE 7/7).
Make sure to connect to a protective conductor terminal.

Models PD 2 and PD 4 supplied for 230 V (see information on the nameplate) can be connected to all power supplies of
220 V or 230 V.

13.1

* seenameplate

Electrical fuses

13.2

Components
B1 Shock-proof socket (on-site)
B2 Shock-proof plug (mounted on the unit)
F4 Mains fuse (on-site)
F5 Mains fuse (on-site)
S2 Main switch (on-site)

Examples for connection to the mains supply

PD 2 und PD 4
with mains supply 230 V / N / PE / 50 / 60 Hz,
connected through 3-pole shock-proof plug system.

PD 2 und PD 4 for 230 V
with mains supply 400 V / 3 ~ / N / PE / 50 / 60 Hz
connected through on-site main switch.

PD 2 und PD 4
with mains supply 220 V / 3 ~ / PE / 50 / 60 Hz
connected through 3-pole shock-proof plug system.

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14 List of spare parts

Pos. No. Part-No. Article

1. A000084 Heating element 2000 W / 230 V (PD 2)

A000085 Heating element 3000 W / 230 V (PD 4)

2. 0017402 Double-U profile

3. A000127 Main switch

4. A000091 Contactor

5. A000116 Stand

6. A000092 Low water cut-off (thermostat)

7. 0030097 Mains connection cable

7.1 A000125 Fuse holder, 2-pole

7.2 0012093 Mains fuse 10 Amp. inert (PD 2)

0012092 Mains fuse 15 Amp. inert (PD 4)

8. 0013104 Thermometer

9. A000115 Hose tap ¼"

7.1

7.2

Please always state model and serial no of the Distillation Apparatus when placing an order for spare parts (information on
name plate).

15 Accessories

Dechlorite Filter eliminates chlorine particles in tap water added by the local waterworks. Complete with connection for
pressure hose ½ inch, with first filling.

Dechlorite Filter Spare filling
Part No. A000129 Part No. A000130

Phosphate cartridge prevents scale formation in the condenser by phosphatising of tap water. Can be used from 4 to 15
°dH (German hardness), equivalent to approx. 0.7 to 2.7 mMol / l. With connection for pressure hose ½ inch, with first
filling.

Phosphate cartridge Spare filling
Part No. A000131 Part No. A000132

Pre-Filter 1 µm, for pre-cleaning the tap water, and to protect the unit from premature contamination. Complete with
connections for pressure hose ½ inch, including filter candle. The candle should be replaced after maximum 6 months.

Pre-Filter with candle Spare candle
Part No. A000133 Part No. A000134

Wall bracket, for one filter or for filter combinations of two or three filters, including sleeves to connect the filters as well
as screws to fix the filters to the wall bracket.

A data sheet on possible connection variants of articles A000129, A000131 and A000133 can be supplied on request.

Wall bracket for one filter Set of all 3 filters, incl. wall bracket
Part No. A000136 and fillings, mounted completely

Part No. A000135

Hose Set, consisting of hoses for water inlet and outlet (length 1.5 m), including hose clips.

Hose Set
Part No. A000137

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LAUDA-GFL Gesellschaft für Labortechnik mbH
Schulze-Delitzsch-Straße 4+5◦ 30938 Burgwedel◦ Deutschland
Tel.: [phone]◦ Fax [phone]
E-Mail: [e-mail] ◦ Internet: www.GFL.de