manesty distillation

7/24/2019 Manesty Distillation

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User GuideUser Guide

Manesty Still MH790

Impact Test Equipment Ltd

www.impact-test.co.uk & www.impact-test.com


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Impact Test Equipment Ltd.Building 21 Stevenston Ind. Est.

StevenstonAyrshireKA20 3LR

T: 01294 602626F: 01294 461168

E: [email protected]

Test Equipment Web Sitewww.impact-test.co.uk

Test Sieves & Accessories Web Sitewww.impact-test.com


3/15

ISSUE 4 PAGE 1

MANESTY WATER STILL

FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

STATEMENT OF INTENDED USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

RAW WATER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

ELEMENTS AND CONNECTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

REPLACING AN ELEMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

LID AND BAFFLE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

PURITY OF DISTILLATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

CLEANING AND DESCALING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

ORDERING OF SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

OVERALL VIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

WIRING LAYOUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
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ISSUE 4 PAGE 1

INSTALLATION AND OPERATING INSTRUCTIONS

1. FOREWORD

Employers and supervisors should ensure that this Instruction Manual, or itscontents, are communicated, or available to all persons who operate, clean,maintain or work in the vicinity of this still.

We have tried to make this publication as complete and comprehensive aspossible and provide information for.

The correct handling, installation and siting of the still.

The safe operation of the still.

Maintenance.

It is the responsibility of all personnel who will operate the still to read andadhere to the instructions given in this publication.

If there is something that you do not understand, cannot find or is not coveredin this publication please contact your local agent orCustomer Service Department, where Technical Representatives areavailable.

2. STATEMENT OF INTENDED USE

The Manesty water still has been designed for the distillation of

water and no other substances. Failure to observe this instruction will resultin damage to the still and possible serious injury to personnel.

3. DESCRIPTION

Raw water enters the still via the flow control needle valve (Item 17 page 9)at the lower end of the condenser pipe and then circulates around the outsideof the condenser tube. As the water rises it is heated by the condensingsteam, almost to boiling point, when unwanted gases (mostly C02 and NH3are expelled from the water and are vented to atmosphere.

Thus the water fed to the boiling chamber has a higher quality than the initialraw water. The water entering the boiling chamber is maintained at aconstant level by weir system, the excess hot water being dischargedthrough the overflow pipe to a suitable drainage point.

The steam raised in the boiling chamber enters the condenser tube via abaffle system which prevents the entrainment of solids.

The condensed distillate is discharged from the outlet at the bottom of thestill.


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PAGE 2 ISSUE 4

4. UNPACKING

NOTE: The rubber packing ring should be removed and discarded priorto operation of the still. Refer to the diagram on Page 9

Carefully remove the cabinet and any loose parts from the packing cases.

Unlock and remove the door from the cabinet. Remove lid, baffle cup andinner baffle from the boiling chamber.

Remove the clamp screw and clamp.

Lift the still until the two pins below the boiling chamber, are clear of the holesin the support bracket, and then tilt the boiling chamber forward to lift the stillup and out of the cabinet.

5. INSTALLATION

CAUTION: It is recommended that there be a minimum clearance of 6above the top of the cabinet

The still when full of water weighs approximately 20kg.

It is essential that the cabinet / still is fastened to a brick wall or othersubstantial structure. Four holes are provided on the internal bracket for thispurpose.

The still should be sited at a convenient height for collection of the distillateand to allow easy access for inspection of the boiling chamber.

CAUTION: Plasterboard / partition walls, or similar are not consideredsuitable for this purpose. It is suggested that a water resistantboard or similar reinforcement be securely fixed to a wall suchthat it will safely support a weight of 20 Kg.

The still should now be reassembled into the cabinet, ensuring that the lowerend of the condenser pipe fits into the hole in the bottom of the cabinet, andthat both locating pins at the rear of the pipe, below the boiling chamber arelocated in the holes on the bracket, inside the cabinet. Reassemble theclamp and secure with the clamp screw.

Assemble the inlet hose onto the tailpiece at the bottom of the condenser

tube and secure using the hose clip provided.Assemble the baffle support, (ensuring that it is properly seated inside theboiling chamber), internal baffle, baffle cup and lid as indicated on theillustration. Refer also to lid and baffle parts.

It is not advisable to fit tubing the distillate outlet as this could restrict the flowof water which in turn will impair the performance of the still and comprisinghygienic operation.

The hot overflow water from the bottom of the cabinet should be piped awayto a suitable drainage point. It is essential that there is no form of restrictionto the free flow of this water, i.e. kinked rubber tubing on the end of the

discharge etc.


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ISSUE 4 PAGE 3

6. RAW WATER SUPPLY

The raw water supply should be uninterrupted. Any variation of pressure inthe mains will be compensated by the inlet regulator. In addition to the inletregulator it is advantageous to fit a stop valve in the line for shut-down

periods, at night-time, etc, so that the regulating valve can remain set at theoptimum position. The volumetric flow of inlet water to the still isapproximately nine times the distillate output.

7. ELEMENTS AND CONNECTORS

WARNING: This equipment is supplied with a lead and plug fused at 13Amp. If an alternative method of connection is used then itis ESSENTIAL that the electric supply includes an earth andcurrent overload protection rated at 13 Amp.

It is strongly recommended that the Electrical Supply to thisequipment includes a residual circuit device (RCD).

The electrical supply must always be disconnected beforecommencing any work on the still, with all electrical workbeing carried out by suitably qualified electricians.

Prior to operation ensure that both element connectors are pushed firmlyhome in their respective sockets and the single mains lead and plug areconnected to a suitable electrical supply.

The elements incorporate a cut-out should the water supply fail and theelements become overheated. This cut out will switch off the element andthen back on again when it has cooled down. This cycle will continue until thestill is filled with water or is switched off.

CAUTION: In the event of severe overheating, a plastic safety device withinthe main body of the element, will be destroyed. The element willno longer function and will have to be replaced.When this happens switch off the electrical supply, allow the stillto cool and then determine and rectify the cause.Qualified electrical assistance should be obtained when dealingwith electrical faults.

Ensure the elements are securely fixed and parallel with the bottom of theboiling chamber. It may be necessary to re-tighten elements after the initialinstallation.


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PAGE 4 ISSUE 4

8. REPLACING AN ELEMENT

Should it be necessary to replace an element the following instructions mustbe adhered to.

Refer to the above drawing

Fit the washer to the pan.

Coat the thermal disc with the silicon grease provided.

Fit the element to the inside of the pan.

Fit the connector to the element.

Secure with the three screws and fit the star washer as shown above.

Fit the cover

9. LID AND BAFFLE PARTS

The baffle system is in two parts. The inner baffle stands on the baffle supportwith the drain holes on the lower side. The baffle cup sits on the top of theinner baffle. The lid rests on the shoulder around the top circumference of the

boiling chamber.NOTE: The condenser tube is held in position by the black rubber end

cap. It is possible that the condenser tube may have movedduring transportation and installation. The correct position iswhen the upper end of the tube protrudes inside the boilingchamber 9.5 mm above the rim of the baffle support.


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ISSUE 4 PAGE 5

10. OPERATION

CAUTION: Except during setting up procedures the cabinet door shouldalways be fitted and locked when the still is in operation.

WARNING: The water must always be turned on before switching on

the electrical supply. Similarly always switch of theelectrical supply before turning off the water. Failure toobserve this procedure could result in damage to elements.

Open the water supply to the still using the flow control needle valve.

It is suggested that an initial setting would be

A 1/4 turn open from closed if mains water supply is used.

1 complete turn open from closed if a header tank water supply isused.

Wait until water can be seen flowing from the outlet (approximately 5-6minutes).

Switch on the electrical supply. When the water in the still is boiling adjust theraw water inlet (using the regulator valve) until the still runs at constanttemperature of 80 degrees C.

The temperature is shown on the temperature indicator strip mounted on thecondenser pipe at the front of the still.

This procedure will allow the still to function efficiently and economically. Ap.H valve of 6.5 - 7.5 should be expected with a maximum conductivity of 5microsiemens.

NOTE: It may be necessary to make further minor adjustments.

WARNING: The heating elements fitted to the Manesty still areof the highest quality, however, under adverse conditionsthe elements will fall prematurely if,

a) the water being heated is corrosive or leaves a corrosive deposit on theelement,

b) the element is used in a hard water ares, as deposits left on the elementwill impair its heating efficiency.

c) If the depth of deposit is sufficient to retain heat then the element willoverheat and either continually cut out or burn out.

d) Westrongly recommend that all elements are checkedon a regular basis and are descaled as necessary.

e) The electrical supply must always be disconnected before removing theelement connectors.


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PAGE 6 ISSUE 4

11. PURITY OF DISTILLATE

One of the methods of assessing the purity of the distilled water is measuringits conductivity. In theory pure water should have zero conductivity. However,even the slighted amount of impurity will allow a small electric current to pass

and the output from a Manesty still should have a conductivity inthe region of 3 to 5 microsiemens, 3 microsiemens is only likely to beobtained under the best possible operating conditions.

Sometimes an output with a higher conductivity is obtained. One of the mostlikely causes is contamination of the distillate by the feed water. This can becaused by minute droplets of after from the boiling chamber getting into thecondenser.

The baffle arrangement on the top of the condenser tube is designed to stopthis happening but if any of the pieces of the baffle system are not correctlyin place then it is possible for a small amount of the feed water to contaminatethe distillate.

Another possible cause is operating the still at a higher output than that forwhich it is designed. In this case the steam is being generated so fast that itsvelocity through the baffles would be sufficient to carry minute droplets ofwater with it.

A further cause could be from contamination of the condenser tubes. If thetubes have been cleaned and all traces of cleaning fluid have not beenremoved, then this would be an obvious source of contamination. However,contamination of this type would eventually clear itself through continuousoperation.

The quality of the feed water is also a possible cause. as theManesty still is of the single pass type it may not be sufficiently efficient toremove a very high level of contamination.

There are two possible solutions to this problem, either to remove some ofthe contamination from the feed water (for example by using a deioniser orwater softener prior to the still), or by double distillation. The former is usuallythe simpler and most cost effective method.

We can supply an electronic water conditioner to use with theManesty still. Contact Impactsales department forfurther details.

Another problem which can arise when operating a still is contamination ofthe distillate by absorption of carbon dioxide. If the distillate is collected at anelevated temperature it will absorb carbon dioxide from the atmosphere asthe water cools. This will cause a decrease in the pH of the distillate.

To reduce this effect it is necessary to collect the distillate at roomtemperature or below. Even this action will not completely prevent theabsorption of carbon dioxide and the amount absorbed will be proportional tothe surface area of the distillate exposed to the atmosphere. If the carbondioxide free water is required it is necessary to collect the distillate under aninert atmosphere.

Alternatively, the distillate can be heated to near boiling point to remove thecarbon dioxide then cooled in a sealed container to prevent re-absorption.


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ISSUE 4 PAGE 7

The absorption of carbon dioxide will decrease the pH of the distillate andeven when operating the still with a feed water at pH7 (neutral) it is possiblethat the distillate under normal conditions could have a pH value of less than7.0

NOTE: All Manesty stills operate with the lid as a safety valve.

If pressure builds up in the boiling chamber the lid, which is onlyheld in place by its own weight, will lift and release pressure. Ifthe lid on the still is continually lifting, this is likely to be causedbut a restriction on the outlet (i.e, the distillate passing througha U trap or into an unvented container).

12. CLEANING AND DESCALING

Allow the still to cool

Disconnect the electric and water supplies. Drain the still by opening thedrain valve until water ceases to run. Remove the Lid (Pt No. 8340850, BaffleCup (Pt No. 8340360), Inner Baffle (Pt No. 8300200) and Baffle Support (PtNo. 8305280)

Unplug both element connectors.

Disconnect the inlet overflow and drain hoses from the pipe head andcondenser.

Unclamp and remove the still from its bracket within the cabinet as previouslydescribed.

Remove the Moulded Rubber End Cap (Pt No. 8305160) from the end of theCondenser Pipe and withdraw the Condenser Tube (Pt No. 8300511).

Remove the heating elements. This is done by removing the locknut andwithdrawing the element from the inside of the boiling chamber.

It is not necessary to remove the condenser pipe from the boiling chamberfor the cleaning and descaling operation, but if for any reason this is done,then the joints should be remade with a fresh gasket on reassembly.

Deposits of hard and encrusted scale should be removed from the boilingchamber using a suitable sharp, but soft instrument which will not damagethe surface of the stainless steel. The final cleaning should be carried out

using a domestic nylon pan scrubber or similar. Attention should be paid tothe shoulder of the boiling chamber on which the lid is seated.

During the above cleaning operation the overflow and gas escape tubesshould be checked to ensure that they are clear. The scale which hascollected on the element should be removed by very carefully chipping.

Reassemble using new element washers and replace any other gaskets orsealing washers which have been disturbed. All spare parts and washes canbe supplied on request.

We do not advise the use of chemical scale removers because, unless theyare handled very carefully, the still will require a lengthy rn-in period beforethe after effects of these chemicals can be removed.


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PAGE 8 ISSUE 4

In districts where the water is either hard or very soft, the still can be operatedwith advantage in conjunction with scale reducer. In the case of hard water,scale formation is considerably reduced with very soft water, the corrosiveaction is greatly minimised.

13. ORDERING OF SPARE PARTS

When ordering spare parts the following information will be required.

Purchase order number.

Serial number of the Still.

Part Number, Description, and Quantities required.


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ISSUE 4 PAGE 9

14. OVERALL VIEW


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PAGE 10 ISSUE 4

15. PARTS LIST

Item Part No. Quantity Description

1 8340810 1 Mains Lead

2 8340550 1 Rating Plate

3 8340540 1 Cabinet4 8344940 4 Plastite Screw

5 8340840 2 Element Connector

6 8340730 1 Condensate Cup

7 8340660 1 Overflow Hose

8 4127030 1 Earth Cable Assembly

9 8340720 1 Clamp

10 4702252 1 M6 x 12 Slotted Pan Head Screw - Stainless Steel

11 8340590 1 Tee Connector

12 8340780 1 Caution Label

13 8300511 1 Condenser Tube

14 8340560 1 Condenser Pipe

15 8305160 1 Rubber End Cap

16 6404890 1 1/4 BSP Nippled Connector

17 8340970 1 Flow Control Needle Valve

18 8340710 1 Lock

19 8340610 1 !/4 BSP - 10mm Plastic Hose Elbow Connector

20 4950190 1 1/4 Fibre Washer

21 8340640 1 Supply Hose

22 8340570 1 Drain Valve

23 8340670 1 Drain Hose

24 8305241 1 Boiling Chamber 25 4909120 6 1/4 BSW Dome Nut

26 4127020 6 Copper Washer

27 8305330 6 Pipe Head Stud

28 8340580 1 Temperature Indicator

29 4127010 2 Element

30 8305290 1 Pipe Head

31 8305090 3 Gasket

32 8340850 1 Lid

33 8340860 1 Baffle Cup

34 8300200 1 Inner Baffle

35 8305280 1 Baffle Support36 8305310 1 Upper Collar

37 8340700 1 Cabinet door

38 8340830 1 Junction Box

39 4702708 1 M6 Hexagon Locknut

40 4702807 1 6mm Diameter Washer

41 8340990 1 Earthing Pillar

42 8340980 1 Stud M5 x 11 Long

43 4702807 1 6mm Diameter Washer

44 4702728 2 M6 Hexagon Locknut


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ISSUE 4 PAGE 11

16. WIRING DIAGRAM


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PAGE 12 ISSUE 4

17. WIRING LAYOUT

manesty distillation

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