Thermo Scientific 678 Series User manual

MEGA-PURE® 12A Water Still
Series 678
Operating Manual and Parts List 927793 (7006753) Rev. 3
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Thermo Scientific
MANUAL NUMBER 927793 (7006753)
329634 2/27/13 Added missing referenced Figure 2-3 to pg 2-3 ccs
2 28194 3/12/12 Removed 208V heater part number as unavailable - pg 9-1 ccs
1 27447 6/30/11 Revised set-up, operation and added cartridge numbers ccs
0 -- 4/12/10 Transfer to Marietta (was 927793 6/18/08) ccs
REV ECR/ECN DATE DESCRIPTION By
Preface
12A Water Still i
Models included in this manual
Models Voltage
A442012 (6754) 208V
A442011 (6753) 240V

Thermo Scientificii 12A Water Still
Preface
Important Read this instruction manual. Failure to read, understand and follow the instructions in this manual
may result in damage to the unit, injury to operating personnel, and poor equipment performance. s
Caution All internal adjustments and maintenance must be performed by qualified service personnel. s
Material in this manual is for information purposes only. The contents and the product it describes are subject to
change without notice. Thermo Fisher Scientific makes no representations or warranties with respect to this
manual. In no event shall Thermo be held liable for any damages, direct or incidental, arising out of or related to
the use of this manual.
©2010 Thermo Fisher Scientific. All rights reserved.

Thermo Scientific 12A Water Still iii
Preface
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with this
symbol.
Equipment being maintained or serviced must be turned off and locked off to prevent possible injury.
Hot surface(s) present which may cause burns to unprotected skin, or to materials which may be
damaged by elevated temperatures.
Marking of electrical and electronic equipment, which applies to electrical and electronic equipment
falling under the Directive 2002/96/EC (WEEE) and the equipment that has been put on the market
after 13 August 2005.
This product is required to comply with the European Union’s Waste Electrical & Electronic
Equipment (WEEE) Directive 2002/96/EC. It is marked with the WEEE symbol. Thermo Fisher
Scientific has contracted with one or more recycling/disposal companies in each EU Member State
European Country, and this product should be disposed of or recycled through them. Further
information on Thermo’s compliance with this directive, the recyclers in your country and
information on Thermo products will be available at www.thermofisher.com.
4Always use the proper protective equipment (clothing, gloves, goggles, etc.)
4Always dissipate extreme cold or heat and wear protective clothing.
4Always follow good hygiene practices.
4Each individual is responsible for his or her own safety.

Thermo Scientificiv 12A Water Still
Preface
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12A Water Still vThermo Scientific
Table of Contents
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Water Supply Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Plumbing Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Bench Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Wall Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
High Temperature Cutoff Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Demineralizer Cartridge Changing . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
Maintenance and Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Electrical Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-2
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
Ordering Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 8
Section 7
Section 9
Section 10

12A Water Still 1-1Thermo Scientific
Section 1 Safety Information
Your Thermo Scientific MEGA-PURE® water still has been designed with
function, reliability, and safety in mind. It is the user’s responsibility to
install it in conformance with local electrical codes. For safe operation, pay
attention to Notes, Cautions, and Warnings throughout the manual.
Warnings
To avoid electrical shock, always:
1. Use a properly grounded electrical outlet of correct voltage and current
handling capacity.
2. Disconnect from the power supply prior to maintenance and servicing.
3. Ensure that the equipment is connected to electrical service according
to local and national standards. Failure to properly connect may create
a fire or shock hazard.
4. Do not mount your MEGA-PURE® 12A Water Still directly over
equipment that requires electrical service. Routine maintenance of this
unit may involve water spillage and subsequent electrical shock hazard
if improperly located.
5. For continued protection against possible fire hazard, replace fuses only
with the same type and rating of fuse.
6. Do not connect unit to electrical service until instructed to do so.
To avoid personal injury:
1. Do not use in the presence of flammable or combustible materials; fire
or explosion may result. This device contains components which may
ignite such materials.
2. "Caution - Hot Surface. Avoid Contact." Glass portions of still
become hot while in operation. To avoid burns, do not touch hot glass.
3. Wear eye and hand protection when using acid for cleaning, as acid
spattering may occur.

1-2 12A Water Still Thermo Scientific
Section 1
Safety Information
To avoid personal injury (continued):
4. Use this device with water feed only. Failure to comply with the above
could result in explosion and personal injury.
5. Ensure all piping connections are tight to avoid leakage of chemicals.
6. Always depressurize chemical lines before disassembly.
7. Follow carefully the manufacturers' safety instructions on labels of
chemical containers and Material Safety Data Sheets (M.S.D.S.).
8. Refer servicing to qualified personnel.
To ensure safe mounting:
Wall composition and construction, as well as fastener type, must be
considered when mounting this unit. The mounting surface and fasteners
selected must be capable of supporting a minimum of 150 lbs.;
inadequate support and/or fasteners may result in damage to mounting
surface and/or equipment. If unsure of mounting surface composition,
condition and construction, or correct fasteners, consult your building
maintenance group or contractor.

12A Water Still 2-1Thermo Scientific
Section 2 Introduction
The Thermo Scientific MEGA-PURE 12A Water Still is a compact, all
glass and Teflon® unit designed to provide 12 liters per hour of high purity
distilled water. The product water, as produced, is non-pyrogenic per
U.S.P. XIX and will have a resistivity up to 10M ohm-cm or higher at the
product outlet using most tap water as feed. The MEGA-PURE 12A
Water Still has a built-in deionization system designed to pretreat the
boiler feed water. Each unit also has a product cooler to reduce the
temperature of the distilled water from 85°C to about 55°C for ease of
handling. Pretreatment may be required to achieve >1.0M ohm/cm water.
This Water Still can be used as a discrete unit, or it can also be connected
to the Thermo Scientific Automatic Collection System for complete
automatic operation.
The MEGA-PURE 12A is rated at 240V, 50/60 Hz, 10,000 watts, single
phase. It is also available in 208V. Changing the unit for use on either
240V or 208V operation requires only replacing the four Vycor®
immersion heaters with heaters having the required voltage rating. The
electrical controls have been designed to operate on voltages between 208
and 240 volts A.C.
The cabinet and glassware are protected against damage from overheating
by two thermal switches. Restoration of operation requires allowing the
unit to cool down for 5 - 15 minutes and restarting.
Choice of a location for your MEGA-PURE 12A Water Still is primarily a
matter of convenience. This unit may be located on a bench or wall
mounted. This water still may be connected to the Automatic Collection
System for complete automatic operation.

2-2 12A Water Still Thermo Scientific
Section 2
Introduction
To operate the MEGA-PURE 12A Water Still, the customer must provide
a power source of single phase, 50/60 Hz. 60 amp, 208 - 240VAC.
Your water still is supplied with a power cord and plug. A certified
electrician should install a receptacle box within 5' of the still. The correct
receptacle to match the supplied plug is a Hubbel #9461C. Figure 1 shows
proper wiring for this receptacle. As an alternate method, your electrician
may remove the supplied plug and wire the cord to a 60A-250V breaker
box as shown in Figure 1-2.
Warning Do not connect unit to power source until instructed to do so. s
Warning Use a properly grounded electrical outlet of correct voltage and
current handling capacity. s
The Vycor immersion heaters will be labeled either 208V or 240V,
according to your order. The 240 volt heaters may be used at 208V, 220V,
230V, or 240V, but at the lower voltages, there will be some reduction in
the volume of distilled water produced. Exchange improperly ordered
heaters with your dealer. You cannot exchange heaters that have been used.
Caution Never use 208V heaters on voltage higher than 208 volts as
premature heater failure will occur. s
Electrical
Requirements
Figure 2-1. Hubbel #9461C Receptacle Figure 2-2. 60A, 250V Breaker Box

12A Water Still 2-3Thermo Scientific
Section 2
Introduction
Water Supply
Requirements
We recommend one of the following options for supplying water to
operate your MP-12A Water Still.
Caution Do not use NaCl regenerated water softeners to supply boiler feed
as alkali attack will shorten heater life. s
OPTION #1
A single, untreated cold water supply. The supply must be capable of
providing a minimum of 30 gallons per hour at a pressure of 20-100 psi
and be located within 4 feet of the water still. You must provide a shut
off valve and reducer as shown in Figure 2-3.
With Option #1, approximately 30 gallons of untreated water will be
used per hour in the cooling section of the still, 3 - 4 gallons of this
water will be used as boiler feed after pretreatment in the deionizer sec-
tion. Water connections are discussed on Section 4.
OPTION #2
An untreated cold water supply plus a source of RO, demineralized or
previously distilled water. The untreated supply must be capable of pro-
viding a minimum of 26 gallons per hour at a pressure of 20-100 psi
and be located within 4 feet of the water still. The treated supply must
be capable of providing 3 - 4 gallons per hour and be located within 4
feet of the water still. You must provide a shut-off valve and reducer at
each water supply (see Figure 2-3).
With Option #2, approximately 26 gallons of untreated water will be
used each hour for cooling. The second (treated) water supply of 3 - 4
gallons per hour will be used as boiler feed after polishing in the dem-
ineralizer section of the MP-12A. Water connections are discussed on
Section 4.
An open or atmospherically vented drain located lower than the still is
necessary to allow for gravity flow. We supply a 5 foot length of 1/2" I.D.
vinyl tubing for the drain. Additional tubing may be purchased from your
distributor.
Drain
Figure 2-3. Shut-off Valve

12A Water Still 3-1Thermo Scientific
Section 3 Unpacking
Tools required for unpacking and assembly: 7/16" open end wrench,
common screwdriver, diagonal cutting pliers. For the procedure below,
refer to Figure 3-1.
1. Remove parts box and still from shipping carton and place on
workbench.
2. Remove the two (2) shipping screws located on upper back of unit and
discard. Turn two (2) cover fasteners located on the lower front of unit
¼ turn counterclockwise, and lift cover out and up to remove Set cover
aside.
3. Check glassware inside the main cabinet for damage. Check parts in
the accessory box for damage. Identify any broken or damaged parts
and report them to your dealer immediately.
4. Using diagonal cutting pliers, cut and remove the seven (7) plastic
shipping ties. Do not remove the tape from the hoses inside the cabinet
until instructed to do so. The shipping tie locations are: Two (2) on the
condenser F, two (2) on the boiler A, two (2) on the product cooler G
and one (1) on the trap E.
Refer to Figure 3-2 for the following steps:
5. Using a 7/16" wrench, loosen the bolt (all the way) on coupling R.
While holding onto condenser, remove springs Y. Carefully remove
condenser from coupling and cabinet.
6. Remove tape from the condenser outlets. Allow the salt used as
packing to flow into the plastic bag around the condenser. Discard the
bag and salt. Rinse the remaining salt residue from the condenser.

3-2 12A Water Still Thermo Scientific
Section 3
Unpacking
Fig. 3-1. Component Location
50K
150K
300K
500K
1meg
purge
High
purity
Change
cartridge
Fig. 3-1. Component Location
Fig. 3-2. Control Panel

12A Water Still 4-1Thermo Scientific
Section 4 Assembly
Refer to Figure 4-1 for the following steps:
1. Re-install the condenser F into the coupling R and clamp condenser in
place with springs Y.
2. Check orientation of trap E. If it is not level or tilted back toward the
boiler as shown in Figure 4-1, move the condenser F up in its bracket.
This will tilt trap as shown in Figure 4-1.
3. Tighten coupling R using 7/16" wrench. Coupling should be just tight
enough to prevent rotation with moderate hand pressure.
4. In the following steps, use warm water on connections for ease of
assembly.
a. Remove tape from 3/8" I.D. vinyl hose and connect to upper right
condenser outlet at Point A (Figure 4-1).
b. Remove tape from 3/8" I.D. vinyl hose and connect to lower right
condenser outlet at Point B (Figure 4-1).
Figure 4-1. Assembly

4-2 12A Water Still Thermo Scientific
Section 4
Assembly
Refer to Figure 4-2 for the following steps:
5. Remove the two (2) springs Y from the product cooler G and remove
cooler from cabinet.
6. Remove tape from the condenser outlets. Allow the salt used as
packing to flow into the plastic bag around the condenser. Discard the
bag and salt. Rinse the remaining salt residue from the condenser.
7. Re-install product cooler in cabinet with the two (2) springs Y. Outlet
on upper left hand side of cooler should be lined up with hole in
cabinet .
8. Remove tape from 3/8" I.D. vinyl hose and connect to lower right
product cooler outlet Point D (Figure 4-2). Use warm water for ease of
assembly.
Refer to Figures 4-3 and 4-4 for the following steps.
9. In the following steps, glass tubing will be assembled using Teflon
connectors S. The Teflon connectors have been factory installed on one
end of the glass tubing. Tubing has been numbered for ease of
identification. To ease assembly, use warm water on glassware and
Teflon connectors.
Figure 4-2. Cooler Setup

12A Water Still 4-3Thermo Scientific
Section 4
Assembly
a. Locate condenser/cooler tubes K and L in parts box, assemble ends
marked "1" with Teflon connector. See Point 1 on Figure 4-4.
b. Route condenser/cooler tube assembly (from Step 1) up through
the cabinet hole at top of demineralizer. Connect End 2 to the
lower left outlet of the product cooler with a Teflon connector. See
Point 2 on Figure 4-4.
c. Connect socket joint End 3 to the lower condenser F outlet using a
#18-A Thomas clamp W from the parts box. Do not overtighten
clamp. See Point 3 on Figure 4-4. Product Cooler may be adjusted
up or down as required.
d. Locate product outlet tube J in parts box. Route through cabinet
holes as shown in Figure 4-3. Connect end labeled "4" to the
upper left tubulation on the product cooler G. See Point 4 on
Figure 4-4.
e. Locate boiler fill tubes H and I in the parts box and assemble the
ends labeled "5" with Teflon connector. See Point 5 on Figure 4-4.
Figure 4-3. Cabinet Holes Figure 4-4. Connections

f. Route boiler fill tube assembly from last step as shown in Figure 4-
4. Connect end labeled "6" to upper right outlet on product cooler.
See Point 6 on Figure 4-4. Unmarked end of assembly is routed to
constant level chamber and supported at boiler fill tube clip AA as
shown.
10. Unpack the four (4) Vycor immersion heaters C and check the voltage
rating on the top cap. It should agree with the voltage of your power
supply. If it does not, contact your dealer and order correct heaters. Do
not run 208V heaters on voltages greater than 208V.
11. Insert the four (4) heaters into the top openings of boiler A as shown
in Figure 4-4.
12. Thread heater plugs and cords through the 3" hole above the boiler A,
then back through the hole below the control box M. Plug one plug
into each heater receptacle on bottom of control box. Plugs are twist-
lock type and require ¼ clockwise turn to lock in place.
Caution Do not remove the Teflon sleeve covering the molded rubber
sleeve on heater element. s
Refer to Figure 4-5 for the following steps.
13. Remove tape from all hoses on the back of the cabinet and route the
two (2) nylon high pressure hoses T through the holes in the side of
the cabinet as shown in Figure 4-5.
14. Route the 4' length 1/2" vinyl hose through the lower hole as shown.
This tubing will serve as the drain for the system. If longer length is
needed, order 1/2" I.D. x 1/16" wall vinyl tubing from your dealer.
4-4 12A Water Still Thermo Scientific
Section 4
Assembly
Figure 4-5. High Pressure Hoses

15. Your MEGA-PURE 12A Water Still is now ready to be moved to its
final location. Visually check for loose connections.
16. Move the assembled water still to its final location. Refer to
Installation Instructions, and bench or wall mount the water still.
Select Method A or B to connect the water supply lines to your MEGA-
PURE 12A Water Still.
Method A - Single supply of untreated tap water available to feed water
still - see Figure 4-6.
a. Locate "T" connector (1) and threaded connector (2) in the parts
box.
b. Connect the "T" connector (1) to the two high pressure hoses T.
These hoses connect to solenoid valves N and may be shortened to
a suitable length. Hand tighten nuts on "T" connector.
c. Thread connector (2) into your water supply and tighten. Connect
length of high pressure hose between "T" connector (1) and
threaded connector (2). Hand tighten nuts on both connectors.
d. Route 1/2" I.D. vinyl tubing to vented drain.
12A Water Still 4-5Thermo Scientific
Section 4
Assembly
Plumbing Details
Figure 4-6. Single Supply of Untreated Tap Water
Detail A. Locations