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.