Stuart W4000, W4000/EURO Instruction Manual
Merit Water Still
W4000 & W4000/EURO
water still Merit W4000
Instruction Manual
Manuel d’utilisation
Manuale d’istruzioni
Manual de instrucciones
Bedienungsanleitung
700492 / 02 2020
& W4000/EURO
EnglishMerit Water Still W4000
Thermostat reset
buttons
Heater
Grommet
Condenser
Boiler
Gaskets and
flange
Condenser upper outlet
Vent Distillate
outlet
water still Merit W4000
Condenser lower inlet
Constant level
control
Outlet
Stopcock
Straps
Figure 1 General assembly
Before use
If the equipment is not used in the manner described in this
manual the protection provided by the equipment may be
impaired.
Note: The Merit Water Still is classified as “Permanently
Connected Equipment” and should be connected to the electricity
supply by a qualified electrician in the manner described in the
electrical installation section of this manual.
The Merit Water Still is designed to operate under the following
conditions:
❖ For indoor use only
❖ Ambient temperature range +5°C to +40°C
❖ Altitude up to 2000m
❖ Relative humidity not exceeding 80%
❖ Mains supply voltage fluctuations not
greater than ±10% of nominal
❖ Overvoltage category II IEC60364-4-443
❖ Pollution degree 2 IEC664
2
Location
The Merit Water Still can be wall or bench mounted. Select a
convenient location which has access to the following services:–
Electricity Supply
Before connection please ensure that the line supply is suitable.
The Merit Water Still W4000 is suitable for supplies rated at
3kW, 220-240V, 50/60Hz~ single phase.
W4000/Euro is suitable for supplies rated at 3.5kW, 200-240V,
50/60Hz~ single phase. Supplies should be fitted with a 30mA RCD
circuit breaker.
Water Supply
A cold water supply capable of providing a minimum flow rate of 60 l/
hr. Ensure all water supplies are earth bonded.
Drain
A waste water drain located below the level of the still so that the
drain pipe can fall away straight without kinks or bends, to allow an
unimpeded flow. Ensure all drainage systems are earth bonded.
Reservoir
A distillate collection reservoir should be located beneath the still.
Assembly
i) Insert the 3 bolts provided into the holes in the metal flange
and place the metal flange over the tapered glass tube of the
boiler – ensuring that the flat side of the flange faces the
boiler.
ii) Take the plastic insert and place this round the glass tube
and into the metal flange. Pull the flange and insert towards
the end of the glass tube so that they press onto the glass.
iii) Place the rubber gasket over the heater coils and then insert
the heating element through the tapered glass tube and into
the boiler.
iv) Now secure the heater using the 3 bolts. Do not over tighten.
4. Feed the electric cable of the heater through the hole in the base
of the support stand. Place the boiler and heater assembly in the
‘cradle’ of the stand. Ensure the stopcock on the boiler is facing to
the front. Secure with the 2 straps provided.
5. Ensure that the sealing o-ring and stabilising o-ring are correctly
positioned, as shown in Figure 3. Fit the condenser WC48/M2 by
mounting it onto the vapour tube of the boiler. Ensure the
distillate outlet tube of the condenser faces the front and the
cooling outlet faces parallel to the unit.
Your Merit W4000 has been designed with ease of assembly
specifically in mind, but before commencing assembly please study
the illustrations and text to familiarise yourself with the general
lay¬out. During assembly, follow the sequence of instructions and do
not connect the mains electricity supply until directed.
1. Unpack the water still and identify the following components:–
Qty. Component Catalogue No.
1
Support stand with 2 boiler straps
Boiler
1
Condenser
1
Heater
1
or
Hose Kit
1
Gasket Kit
1
2. Take the metal stand and place in the desired location.
Note that 2 screw holes are provided for wall fitting.
If wall mounting you must ensure you use appropriate
wall fixings that can hold a minimum weight of 28KG. If
you are in any doubt seek professional advice.
3. Take the boiler W4000/B, the heater and gasket kit W4000/GK.
Assemble the heater into the boiler as shown in Figure 2.
W4000/S
W4000/B
WC48 M2
A6/6 (240V)
A6/6/EURO (220V)
W4000/HK
W4000/GK
Figure 3
Condenser
Sealing o-ring
Vapour tube
Stabilising o-ring
Cooling
water
outlet
Outlet
tube
Figure 2 Flange assembly
Bolts
Tapered
glass
tube
Metal
flange
Plastic
insert
Rubber
gasket
Heater
3
6. From the hose kit take the 225mm length of 8mm bore plastics
hose fitted with screwthread connectors at either end. Referring to
Figure 1, screw one end of the hose to the upper outlet of the
condenser and the other end to the glass thread on the constant
level control. If the Still has been correctly assembled the hose
should comfortably reach, without any strain.
7. Take the 1000mm length of 16mm bore plastic hose and carefully
connect to the outlet of the constant level control. For easy
connection first warm the hose with hot water.
Secure with a tie strap.
Circuit diagram
L N
(S)
Switch
(W4000/EURO only)
(S)
Thermostat
~240V
Lamp
(S)
Thermostat
8. Lead the free end of the tubing to drain, ensuring it falls away
from the still with no kinks or bends to impede water flow.
9. Ensure the stopcock on the constant level control is closed.
10. Connect the lower inlet of the condenser to the cold water feed
supply. A plastic screwthread connector is provided for easy
attachment to the condenser.
Select good quality tubing and ensure all connections are secured
with hose clips.
11. Connect the distillate outlet on the condenser to a suitable
collection reservoir.
12. Turn on the water supply and test for leaks then turn off the water
supply.
Electrical installation
THIS EQUIPMENT MUST BE EARTHED!
The electrical installation should only be carried out by a qualified
electrician.
The equipment is supplied with 1.7m of flexible triple core circular
cable to CMA 3183 TQ specification. The conductors are 1.5mm2 to BS
6360 Class 5 insulated with E.P.R. The outer sheath is 85°C heat
resisting type C.S.P. to HOFR, BS 6500 Table 9.
Connection to the mains electrical supply, should be via a double pole
30mA RCD isolation circuit breaker with a continuous current carrying
capacity of 15A at 250v and overcurrent protection of 15A, 250V .
These devices should be sited near to the equipment and clearly
marked – “Disconnect device for Merit Water Still“
Connect to the line supply noting that the wires in the instrument lead
are coloured in accordance with the following code:–
Brown – Live
Blue – Neutral
Yellow/Green – Earth
E
Element
Heater flange
(S) Denotes safety critical component.
Operation
1. Turn on the cold water supply and adjust the flowrate to approx.
60 l/h.
Note: It is strongly recommended to measure the flow rate,
failure to do so can result in possible injury from hot water
exiting from the Still. If a flow meter isn't available a simple
measurement can be performed with a 1L beaker.
timed period of five minutes the beaker should be completely
filled five times.
Observe that the water flows via the condenser and into the boiler.
Wait until the boiler has attained its correct operating level and
make sure that the excess water is flowing freely to drain.
2. Switch on the electricity supply to the heating element at the
mains isolation switch.
For the W4000/EURO version, switch on the switch situated on the
heater.
3. After a few minutes the water will start to boil and distillate will
emerge from the condenser. With new glassware, or after cleaning,
it is advisable to allow this to run to drain for approximately 30
minutes before beginning collection.
4. To turn off the still, first turn off the heating element but allow the
cooling water to continue for a further 10 minutes to allow the still
to cool.
Over a
Mains Cable Replacement
If the mains cable requires replacement, only specially prepared spare
mains lead obtained from Cole-Parmer should be used.
Hot warning
Some parts of the product may become hot during
use. These are clearly marked with 'Hot Warning
Labels. Avoid touching these parts.
4
WARNING!
Do not use this equipment to distil any liquid other than
water.
Safety cut-outs
The Merit Water Still is protected by two safety cut-outs:
Boiler heater thermostats
Should the boiler water level fall and expose the
element the thermostats will operate and turn off the
electricity supply to the element.
After operation of either of the thermostats, normal operation may be
resumed by resetting the thermostats by means of their respective
reset buttons mounted on the end of the heater end cover.
Remove the black plastic cover and then press the button – a slight
click will be heard if the thermostat had operated.
Before resetting either thermostat the still should be
allowed to cool completely and the cause of cut-out
operation identified and rectified.
If the thermostats continue to operate consult a qualified electrician or
the Service Department of Cole-Parmer.
Care and maintenance
Note: Before commencing any maintenance, cleaning or fault
finding the equipment should be isolated from the mains electricity
supply. These operations should be only carried out by suitably
qualified personnel.
Only spare parts supplied or approved by Cole-Parmer, or its agent
should be used. Fitting of non-approved parts may affect the
performance or safety of the equipment.
Maintenance
Due to the nature of these parts it is necessary to periodically check
the quality of the plastic connectors and hoses. There should be no
strain on the connectors or hoses. Both the hoses and connectors
should be intact without any cracking. If any damage is discovered on
these parts the Still should immediately be turned off, as detailed
under the "Operation" section of this manual, and not used again
before these parts are replaced. Please refer to the "List of spare parts"
section of this manual for order codes.
5. Into the open funnel of the constant level control carefully add
about 1 litre of 10% formic acid solution or kettle descaler.
Do not use strong acids such as hydrochloric, this can cause severe
corrosion of the metal heating element.
WARNING!
ALWAYS HANDLE ACIDS WITH GREAT CARE. PROTECTIVE
CLOTHING, GLOVES AND FACE-MASKS SHOULD BE WORN
DURING THE DESCALING OPERATION.
REMOVE ANY ACID SPILLS IMMEDIATELY.
Turn on the water supply and fill the boiler to the normal
operating level. The water will flush the acid into the boiler. The
water supply should be turned off when the level in the boiler is
slightly below the overflow.
6. Leave the acid in the boiler to desolve the scale. This may take
some time depending on the severity of the build-up.
7. Open the stopcock and allow the boiler to drain.
Note: If the acid in the boiler has not been completely
neutralised
necessary safety precautions should be observed around the
drain and any effluent control procedures followed.
8. Close the stopcock, turn on the water and allow the boiler to fill
with cold water. Turn off the water, re-open the stopcock and allow
the boiler to drain. Repeat this procedure three times.
9. The Merit Water Still may now be restarted by referring to the
instructions given under “Operation” in this manual.
Note: The stand and outer surfaces of the glassware should be
cleaned using a damp cloth and a mild detergent solution.
the liquid flowing to drain may be highly acidic. All
List of spare parts
Cleaning
Over a period of operation scale deposits will build up inside the
boiler. To obtain optimum performance from the still, the scale should
be removed on a regular basis.
The time span between cleaning depends greatly on the hardness of
the water supply and the amount of use. Frequently used stills in hard
water areas may need descaling once a week whereas in a soft water
area several weeks may elapse before descaling is necessary.
Note: Heavy scaling will reduce distilled water quality and can
shorten the life of the heating element.
It is possible to descale the Merit Water Still without dismantling the
glassware by following these instructions in conjunction with Control
of Substances Hazardous to Health regulations (COSHH) 1988.
1. Switch off the electricity supply to the still and allow it to cool
completely.
2. Turn off the cooling water supply.
3. Open the stopcock on the constant level control and allow the
boiler to drain completely, Close stopcock.
4. Turn on the cooling water supply and allow the boiler to fill to
approximately half way to its normal operating level. Turn off
the water supply.
The following components are available from most laboratory
suppliers. In case of difficulty, please contact Cole-Parmer.
Cat. No.
Boiler
Condenser
Heater (complete with thermostats) 240V
(complete with thermostats) 220V
Set of heater fixings (flange, gasket, insert and bolts)
Hose kit
W4000/B
WC48/M2
A6/6
A6/6/EURO
W4000/GK
W4000/HK
Warranty
Cole-Parmer Ltd. warrants this instrument to be free from defects in
material and workmanship, when used under normal laboratory
conditions, for a period of three (3) years. In the event of a justified
claim Cole-Parmer will replace any defective component or replace
the unit free of charge.
This warranty does NOT apply if damage is caused by fire, accident,
misuse, neglect, incorrect adjustment or repair, damage caused by
incorrect installation, adaptation, modification, fitting of non
approved parts or repair by unauthorised personnel.
This Warranty does not include the heater element which is only
guaranteed for 1 year.
5
Fault finding
In the event of operating difficulties with your Merit Still, please consult the following notes. If
these fail to identify and remedy the fault, then you are advised to seek the help of your
supplier or the Service Department of Cole-Parmer.
Note – Fault finding should only be carried out by suitably qualified people.
Symptom Cause Remedy
1. Water level in boiler is too
LOW. e.g. – heater exposed.
2. Water level in boiler is too
HIGH. e.g. – boiling water
surging into condenser.
3. Water in boiler is “pumped”
out of boiler to drain.
4. Distillate temperature is Flow of cooling water is insufficient.
high, e.g. – above 50°C.
a) Supply of feed/cooling water is
insufficient.
b) Stopcock on boiler inadvertently
left open.
a) Supply of feed/cooling water
is excessive.
b) Flow of drainage water
is constricted.
a) Tubing from condenser distillate
outlet to reservoir is constricted.
b) Vent on condenser distillate
outlet is blocked.
c) Supply of feed/cooling water
is insufficient.
a) Increase flowrate of water to
approx. 60 litres/hour.
b) Close stopcock.
a) Reduce flowrate of water to
approx. 60 litres/hour.
b) Ensure drainage tubing falls
freely.
a) Ensure tubing falls freely to
reservoir without kinks or bends.
b) Remove obstruction.
c) Increase flowrate of water to
approx. 60 litres/hour.
Increase flowrate of water to
approx. 60 litres/hour.
5. Distillate rate less than 4 litres/hour. Mains voltage low Excessive
cooling water flow.
6. Distillate quality poor*. Boiler heavily scaled. Clean boiler.
7. Heater not working. a) Burnt-out heater.
b) Mains electricity fuse blown.
c) Thermostat operated.
8. Persistent tripping of the RCD The integrity of the heater Replace the RCD
* Distillate quality when determined by pH or electrical conductivity is greatly affected by temperature and the presence of absorbed carbon
dioxide.
–
Reduce to 60 litres/hour.
a) Replace heater.
b) Replace fuse.
c) Reset.
6
W4000 & W4000/EURO
Réfrigérant
Bouilleur
Boutons de
rearmement
thermostat
Elément
Chauffant
FrançaisDistillateur
Entrée inférieure de condenseurSortie supérieure de condenseur
Contrôleur
de niveau
Sortie eau de
refroidissement
Œillet
Figure 1 : Vue d’ensemble
Joint
d’étanchéité et
collier de
fixation
Event Sortie
Avant l’utilisation
Si l’appareil n’est pas utilisé de la manière décrite
ci-après, les sécurités prévues peuvent être défaillantes.
N.B. L’appareil à cau distillée MERIT est classé parmis les
«appareils connectés en permanence» et doit être raccordé par un
électricien qualifié comme décrit dans la section
«installation électrique» de ce manuel.
Le distillateur MERIT est prévu pour fonctionner dans les conditions
suivantes :
❖ Utilisation en intérier uniquement.
❖ Température d’utilisation +5°C à 40°C.
❖ Altitude < 2000m.
❖ Humidité relative < 80%.
❖ Alimentation électrique ne variant pas de ±10%
autour de la valeur nominale.
❖ Survoltage catégorie II IEC60364-4-443.
❖ Degré de pollution 2 IEC664.
distillat
water still Merit W4000
Robinet
Anneau de
fixation
7
Installation
Le distillateur MERIT peut être installé sur une paillasse ou fixé au mur.
Choisir un emplacement à proximité des dispositifs suivants:
Alimentation électrique:
Avant de connecter l’appareil, vérifier que l’alimentation électrique est
correcte. Modèle W4000 pour alimentation électrique 3kW 220V,
50/60Hz monophasé. Modèle W4000 EURO pour alimentation
électrique 3.5kW 220V, 50/60Hz monophasé. Des approvisionnements
devraient être équipés d'a 30mA RCD disjoncteur. Les fournitures
doivent être munis d'un disjoncteur de circuit RCD 30mA.
Alimentation en eau:
Source d’eau froide capable de fournir un débit minimum de 60 l/hr.
Evacuation:
Dispositif d’évacuation ou évier situé en dessous de l’appareil de façon
à ce que le tuyau d’évacuation d’eau ne présente aucun coude.
Réservoir de recette:
Un réservoir de recette du distillat pourra être installé sous l’appareil.
Montage
1. Déballer le distillateur et identifier les
composants suivants:–
Qte Designation Référence
1
Support muni de 2 anneaux
métalliques de fixation
Bouilleur
1 775421
Réfrigérant
1 775361
Elément chauffant 220V
1 775422
1 775426
1
de tuyaux
Jeu
Jeu de colliers de fixation
W4000/S
775424
i) Insérez les 3 boulons fournis dans les orifices de la bride
métallique et placez-la sur le tube en verre conique du
bouilleur en vous assurant que le côté plat de la bride est
orienté vers le bouilleur.
ii) Insérer le collier en graphite à l’intérieur du collier
métallique. Tirer le collier métaliique et son insert en
graphite vers l’extrémité du bouiller de façon à ce qui’ils
exercent une pression sur le tube évasé.
iii) Insérer le joint en caoutchouc par dessus les spires de
l’élément chauffant. Introduire l’élément chauffant dans le
bouilleur.
iv) Fixer l’élément chauffant en vissant les 3 boulons. Ne pas
serrer à bloc.
4. Placer le bouiller et l’élément chauffant sur le support. Le robinet
doit alors faire face à l’utilisateur. Faire passer le câble
d’alimentation à travers l’orifice situé à la base du support. Fixer le
bouilleur avec les 2 anneaux métalliques.
5. Enfiler le réfrigérant sur le tube vapeur du bouilleur. L’orifice de
sortie du distillat doit faire face à l’utilisateur.
Figure 3
Sortie d'eau
de refroidissement
Condenseur
2. Installer le support à l’emplacement choisi. 2 trous permettent
de le visser au mur si nécessaire.
En cas de montage mural, vous devez vous assurer
d'utiliser des fixations murales appropriées pouvant
supporter un poids minimum de 28 kg. Demandez
conseil à un professionnel en cas de doute.
3. Prendre le bouilleur, l’élément chauffant et le jeu de colliers.
Assembler selon la figure 2.
Boulon
Joint torique
d'étanchéité
Tube de vapeur
Joint torique de
stabilisation
Tube de
sortie
Figure 2
8
Tube évasé Collier
métallique
Collier en
graphite
Joint en
caoutchouc
Elément
chauffant
6.7.Dans le jeu de tuyaux, prendre le tube 225mm de long et 8mm
de diamètre équipé de connecteurs à vis à ses 2 extrémités.
Visser une extrémité du tuyau sur le raccord à vis supérieur du
réfrigérant et l’autre extrémité sur le raccord à vis du contrôleur
de niveau (voir figure 1).
Prendre le tuyau de 1000 mm de long et 16 mm de diamètre.
Fixer avec précaution son extrémité en sortie du contrôleur de
niveau. Pour faciliter cette opération, passer prélablement
l’extrémité du tuyau sous l’eau chaude. Fixer avec un collier.
8. Placer l’extrémité libre du tuyau vers l’évacuation, en s’assurant
qu’il ne présente aucun coude pouvant perturber l’écoulement
de l’eau.
9. Vérifier que le robinet du contrôleur de niveau est fermé.
Schema de principe
P N
~240V
(S
)
Interrupteur
(S
)
Thermostat
120°C
Lampe
(
S)
Thermostat
120°C
T
10. Visser le connecteur plastique sur le raccord à vis inférieur du
réfrigérant. Fixer le tuyau d’alimentation en eau froide sur ce
connecteur. Choisir un tuyau de bonne qualite et vérifier que
toutes les connexions sont renforcées par un collier.
11. Relier par un tuyau l’orifice de sortie du distillat au réservoir de
recette.
12. Ouvrez l’alimentation en eau et testez la présence de fuite puis
coupez l’alimentation en eau.
Installation electrique
CET APPAREIL DOIT ETRE RELIE A LA TERRE !
L
’installation électrique doit être effectuée par un électricien qualifié.
L’appareil est livré avec un câble de 1,7m (conforme aux spécifications
CMA 3183 TQ). Les fils conducteurs, de section 1,5mm2 (conformes aux
spécifications BS 6360 classe 5) protégés avec de l’EPR. La résistance à
la température est de 85°C et de type CSP à HOFR, BS 6500, table 9.
La connexion à l'alimentation électrique doit être un pôle double
isolation RCD 30mA disjoncteur avec un courant continu nominal de
15A à 250V et la protection de surintensité de 15A, 250V.
Cet équipement doit se trouver à proximité de l’appareil et être
clairement identifier «protection pour distillateur MERIT».
Raccorder le câble selon les indications suivantes:
Marron - Phase
Bleu - Neutre
Jaune/vert - Terre
Si le câble d’alimentation nécessite un remplacement, un câble
spécial, fournis par Cole-Parmer, doit être utilisé.
Avertissement chaud
Certaines pièces du produit peuvent chauffer à
l’utilisation. Elles sont clairement marquées avec des
étiquettes d’avertissement « Chaud ». Évitez de
toucher ces pièces.
Element
Chauffant
Couvercle
(S
) Composant de sécurité.
Mise en route
1. Ouvrir le robinet d’eau froide et régler le débit à 60 litres/heure
environ. L’eau doit circuler à travers le réfrigérant. Attendre que le
niveau d’eau dans le bouilleur soit stable. Vérifier que l’eau
s’écoule normalement vers l’évacuation.
2. Allumer l’interrupteur de l’élément chauffant.
Observer l’ébullition et vérifier que le distillat s’écoule
normalement vers le réservoir de recette.
ATTENTION !
NE PAS UTILISER CET APPAREIL POUR DISTILLER AUTRE CHOSE
QUE DE L’EAU.
Thermostats de sécurité
Le distillateur MERIT est protégé par deux thermostats de sécurité.
Thermostat de sur-chauffe du bouilleur.
Si le controleur de niveau est défectueux et expose
l’elément chauffant à une sur-chauffe, le thermostat agit
et coupe l’alimentation électrique de la résistance.
Après l’opération d’un des deux thermostats, il suffit de les réarmer
en appuyant simplement sur le bouton adéquoit situé à gauche de
l’élément chauffant.
Retirer le capuchon plastique et appuyer sur le bouton (un léger «
clic » doit se produire).
AVANT LE REARMEMENT, IL FAUT ATTENDRE LE
REFROIDISSEMENT DE L’APPAREIL, ET LA CAUSE DU
DECLENCHEMENT DES THERMOSTATS, IDENTIFIEE ET
RECTIFIEE.
Si le thermostat continue de se déclencher, consulter un électricien
qualifié ou le service technique de Cole-Parmer.
9
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