Yamato DC401 User manual

Freeze Dryer
Model DC401
Instruction Manual
- First Edition -
Yamato Scientific America Inc．
Santa Clara，CA
Printed on recycled paper
Thank you for choosing DC series freeze
dryers from Yamato Scientific Co., Ltd.
For proper equipment operation, please read
this instruction manual thoroughly before
use. Always keep equipment documentation
safe and close at hand for convenient future
reference.
WARNING!:
Read instruction manual warnings and
cautions carefully and completely before
proceeding.

Contents
1. SAFETY PRECAUTIONS....................................................................1
Explanation of Safety Symbols ....................................................................................1
Symbol Glossary .........................................................................................................2
Warnings & Cautions...................................................................................................3
Warnings & Cautions...................................................................................................4
2. PRE-OPERATION PROCEDURES .....................................................5
Installation Precautions & Preparations .......................................................................5
Installation Procedures................................................................................................8
3. COMPONENT NAMES & FUNCTIONS...............................................9
Unit Overview..............................................................................................................9
Control Panel.............................................................................................................10
4. OPERATION PROCEDURES............................................................11
Pre-freezing...............................................................................................................11
Main Operation..........................................................................................................12
Defrost.......................................................................................................................16
5. HANDLING PRECAUTIONS .............................................................17
6. MAINTENANCE PROCEDURES.......................................................19
Inspection & Maintenance..........................................................................................19
7. STORAGE & DISPOSAL...................................................................20
Disposal Considerations............................................................................................20
8. TROUBLESHOOTING.......................................................................21
Troubleshooting Guide...............................................................................................21
9. SERVICE & REPAIR..........................................................................22
10. SPECIFICATIONS ...........................................................................23
Main Unit...................................................................................................................23
Optional Accessories.................................................................................................24
11. WIRING DIAGRAM..........................................................................25
DC401.......................................................................................................................25
12. REPLACEMENT PARTS.................................................................26
13. LIST OF HAZARDOUS SUBSTANCES ..........................................27

1
1. SAFETY PRECAUTIONS
Explanation of Safety Symbols
A Word Regarding Symbols
Various symbols are provided throughout this text and on equipment to
ensure safe operation. Failure to comprehend the operational hazards and
risks associated with these symbols may lead to adverse results as explained
below. Become thoroughly familiar with all symbols and their meanings by
carefully reading the following text regarding symbols before proceeding.
Warning
Caution
Signifies a situation which may result in minor injury (Note 2)
and/or property damage (Note 3)
(Note 1) Serious injury is defined as bodily wounds, electrocution, bone
breaks/fractures or poisoning, which may cause debilitation requiring
extended hospitalization and/or outpatient treatment.
(Note 2) Minor injury is defined as bodily wounds or electrocution, which will not
require extended hospitalization or outpatient treatment.
(Note 3) Property damage is defined as damage to facilities, equipment, buildings or
other property. （Note 1 ）Serious injury is defined as bodily wounds,
electrocution, bone breaks/fractures or poisoning which, may cause
debilitation requiring extended hospitalization and/or outpatient treatment
（Note 3）Property damage is defined as damage to facilities, equipment, buildings or
other property.
Symbol Meanings
Signifies warning or caution.
Specific explanation will follow symbol.
Signifies restriction.
Specific restrictions will follow symbol.
Signifies an action or actions which operator must undertake.
Specific instructions will follow symbol.
Signifies a situation which may result in serious
injury or death (Note 1)

2
1. SAFETY PRECAUTIONS
Symbol Glossary
Warning
General
Warning
Danger!: High
Voltage
Danger!:
Extremely Hot
Danger!: Moving
Parts
Danger!: Blast
Hazard
Caution
General Caution
Caution:
Shock Hazard!
Caution: Burn
Hazard!
Caution: Do Not
Heat Without
Water!
Caution: May
Leak Water!
Caution: Water
Only
Caution: Toxic
Chemicals
Restriction
General
Restriction
No Open Flame
Do Not
Disassemble
Do Not Touch
Action
General Action
Required
Connect Ground
Wire
Level Installation
Required
DisconnectPower
Inspect Regularly

3
1. SAFETY PRECAUTIONS
Warnings & Cautions
WARNING!
Never operate equipment near combustible gases/fumes.
Do not install or operate DC series unit near flammable or explosive gases/fumes. Unit is NOT fire or
blast resistant. Negligent use could cause a fire/explosion. See “List of Hazardous Substances” (P.28).
Always ground equipment.
Always ground this unit properly to avoid electric shock.
DO NOT operate equipment when abnormalities are detected.
If smoke or unusual odors begin emitting from unit, or if any other abnormalities are detected, terminate
operation immediately, turn off main power switch (Earth Leakage Breaker - “ELB”) and disconnect
power cable. Continued operation under such conditions may result in fire or electric shock.
DO NOT operate with bundled or tangled power cable.
Operating unit with the power cable bundled or otherwise tangled, may cause power cable to overheat
and/or catch fire.
DO NOT damage power cable.
Damaging the power cable by forcibly bending, pulling or twisting may cause fire or electric shock to the
operator.
DO NOT handle flammable substances without proper ventilation.
Be sure there is adequate ventilation when working with certain flammable substances (such as
ethanol, etc.), which evaporate quickly at or below room temperature, and emit flammable fumes.
Insufficient ventilation may cause a fire or explosion. See “List of Hazardous Substances” (P.28).
DO NOT disassemble or modify equipment.
Attempting to dismantle or modify unit in any way, may cause malfunction, fire or electric shock.

4
1. SAFETY PRECAUTIONS
Warnings & Cautions
CAUTION!
DO NOT operate equipment during thunderstorms.
In the event of a thunderstorm, terminate operation and turn off main power switch (ELB) immediately. A
direct lightning strike may cause damage to equipment, or result in fire or electric shock.
DO NOT touch ice in cold trap.
Handling ice in the cold trap during or after operation with bare hands/fingers may result in severe
frostbite.
DO NOT touch cooling fins.
Edges of cooling fins are very sharp. Do not contact with bare hands or skin. Laceration injuries may
result.

5
2. PRE-OPERATION PROCEDURES
Installation Precautions & Preparations
WARNING!
1. Equipment MUST always be grounded properly.
Always connect power cable to a grounded outlet to prevent electric shock from power surges.
Never connect ground wire to gas lines, water pipes, telephone grounding lines or lightening
rods. Doing so may result in fire or electrical shock.
Do not use branched outlets or extension cords, which may cause power cable to overheat
and/or catch fire.
2. Choose an appropriate installation site.
●Do not install DC series unit:
・where flammable or corrosive
gases/fumes will be generated.
・where external temperature will exceed
35ºC, will fall below 5ºC or will
fluctuate.
・in excessively humid or dusty locations.
・where there is constant vibration.
・where power supply is erratic.
・in direct sunlight or outdoors
Install DC unit in a location with sufficient space, and venilation as specified as below.
More than
20cm
More than
20cm
Front side
More than 40cm
3. Install in a location free of flammables and explosives.
●Never install near flammables or
explosives. This unit is NOT fire or blast
resistant. Simply switching the main
power switch (ELB) “ON” or “OFF” can
produce a spark, which can relay during
operation, causing a fire or explosion
when near flammable or explosive
fluids, chemicals or gases/fumes.
See “List of Hazardous Substances”
(P.28).
Main
Unit

6
2. PRE-OPERATION PROCEDURES
Installation Precautions & Preparations
4. Never disassemble or modify.
Attempting to disassemble or modifiy
this unit in any way may result in
malfunction, fire or electric shock.
5. Install on a level surface.
Install unit on a level and even surface.
Failure to do so may result in abnormal
vibrations or noise and damage to the
refrigeration system.
Approximate unit weight:
DC401: 47kg.
Handle with care. Transport and installation should always be performed by two or more people.

7
2. PRE-OPERATION PROCEDURES
Installation Precautions & Preparations
CAUTION!
6. Connect to a proper power supply.
Connect power cable to a suitable facility outlet or terminal, according to the following
electrical requirements.
Electrical
requirements:
DC401: 220V AC, 50/60Hz, 2.6A (When used with pump & heater: 12A)
NOTE)
Check the line voltage on outlet or terminal to be used and properly evaluate whether to
utilize a line being shared by other equipment. If the unit is not activated by turning on
the main power switch (ELB), take an appropriate course of action, such as connecting
the unit to a dedicated power source.
If multiple power cables are connected to a single outlet, input voltage to unit may drop,
causing degraded cooling and temperature control performance.
7. Install in a safe location.
In the event of an earthquake or other unforeseen incident, equipment may unexpectedly shift
or fall, causing injury. Taking preventative steps to install unit in a safe location, away from
room access doors and out of other danger is strongly recommended.
8. Handle power cable with care.
Never operate unit with power cable bundled or tangled; and do not modify, bend, forcibly
twist or pull on power cable. Doing so may cause fire and/or electrical shock.
Do not risk damage to power cable by positioning it under desks or chairs, or by pinching
it between objects. Doing so may cause fire and/or electrical shock.
Do not place power cable near kerosene/electric heaters or other heat-generating
devices. Doing so may cause power cable insulation to overheat, melt and/or catch fire,
which may result in electric shock.
Turn off main power switch (ELB) immediately and disconnect from facility terminal or
outlet, if power cable becomes partially severed or damaged in any way. Failure to do so
may result in fire or electric shock.
Contact a local dealer or Yamato sales office for information about replacing power cable
if it is damaged.
Always connect power cable to appropriate facility outlet or terminal.