Yamato DNF 400 User manual

Forced Convection
Constant Temperature Oven
Model
DNF 400/410/600
610/810/910
Instruction Manual
- Version 5 -
Yamato Scientific Co. LTD.
zThank you for purchasing "Forced Convection
Constant Temperature Oven, DNF Series" of
Yamato Scientific Co., Ltd.
zTo use this unit properly, read this "Instruction
Manual" thoroughly before using this unit.
Keep this instruction manual around this unit for
referring at anytime.
WARNING!:
Carefully read and thoroughly understand the
important warning items described in this
manual before usin
g
this unit.

Contents
Cautions in Using with Safety................................................................1
•Explanation.................................................................................................................... 1
•Table of Illustrated Symbols .......................................................................................... 2
•Fundamental Matters of "WARNING!" and "CAUTION!"............................................... 3
Before Using this unit.............................................................................4
•Requirements for Installation......................................................................................... 4
Description and Function of Each Part.................................................9
•Main Unit .......................................................................................................................9
•Control Panel............................................................................................................... 12
Operation Method .................................................................................13
•Key Operation Chart of Mode Setting and Program Registering ................................ 13
•Operation Mode and Function List .............................................................................. 14
•Fixed Temperature Operation...................................................................................... 15
•Auto Stop Operation.................................................................................................... 17
•Auto Start Operation.................................................................................................... 20
•Program Operation...................................................................................................... 22
•Input Program.............................................................................................................. 25
•Input Program; Set the Temperature ........................................................................... 27
•Input Program; Set the Time ....................................................................................... 28
•Input Program; Set the Fan Rotation Speed ............................................................... 29
•Input Program; Set the Repeat Initiating Step ............................................................. 30
•Input Program; Set the Repeat Count ......................................................................... 31
•Input Program; Insert Step .......................................................................................... 32
•Input Program; Add Step ............................................................................................. 33
•Input Program; Delete Step......................................................................................... 34
•Input Program; End Program ...................................................................................... 35
•Program Creation Method ........................................................................................... 36
•Programming Preparation Form.................................................................................. 42
•Set the Timer Mode ..................................................................................................... 43
•Set the Key Lock Mode ............................................................................................... 44
•Set the Buzzer Mode................................................................................................... 45
•Calibration Offset Function.......................................................................................... 46
•Integrating Operation Time.......................................................................................... 47
•Set Clock ..................................................................................................................... 48
•Set Fan Operation at Wait State.................................................................................. 50
•Set the Fan Rotation Speed ........................................................................................ 51
•Set the Communication Lockout Mode (Optional accessory) ..................................... 52
•How to Operate the Damper ....................................................................................... 53
•The Independent Overheating Prevention Device ...................................................... 54
•Temperature Rise/Fall Data (Reference Data) ............................................................ 55

Handling Precautions ...........................................................................56
Maintenance Method.............................................................................57
•Daily Inspection and Maintenance .............................................................................. 57
Long storage and disposal...................................................................58
•When not using this unit for long term / When disposing ............................................ 58
In the Event of Failure….......................................................................59
•Safety Device and Error Code..................................................................................... 59
•Trouble Shooting ......................................................................................................... 61
After Service and Warranty ..................................................................62
Specification..........................................................................................63
Wiring Diagram......................................................................................65
Replacement Parts Table......................................................................69
Reference...............................................................................................71
•List of Dangerous Substances .................................................................................... 71

1
Cautions in Using with Safety
Explanation
MEANING OF ILLUSTRATED SYMBOLS
Various symbols are used in this safety manual in order to use the unit without
danger of injury and damage of the unit. A list of problems caused by ignoring
the warnings and improper handling is divided as shown below.Be sure that you
understand the warnings and cautions in this manual before operating the unit.
WARNING! If the warning is ignored, there is the danger of a problem that
may cause a serious accident or even fatality.
CAUTION! If the caution is ignored, there is the danger of a problem that may
cause injury/damage to property or the unit itself.
Meaning of Symbols
This symbol indicates items that urge the warning (including the caution).
A detailed warning message is shown adjacent to the symbol.
This symbol indicates items that are strictly prohibited.
A detailed message is shown adjacent to the symbol with specific actions not to
perform.
This symbol indicates items that should be always performed.
A detailed message with instructions is shown adjacent to the symbol.
Illustrated Symbols

2
Cautions in Using with Safety
Table of Illustrated Symbols
Warning
Warning,
generally
Warning,
high voltage
Warning,
high temperature
Warning,
drive train
Warning,
explosive
Caution
Caution,
generally
Caution,
electrical shock
Caution,
scald
Caution,
no road heating
Caution,
not to drench
Caution,
water only
Caution,
deadly poison
Prohibit
Prohibit,
generally
Prohibit,
inflammable
Prohibit,
to disassemble
Prohibit,
to touch
Compulsion
Compulsion,
generally
Compulsion,
connect to the
grounding
terminal
Compulsion,
install on a flat
surface
Compulsion,
disconnect the
power plug
Compulsion,
periodical
inspection

3
Cautions in Using with Safety
Fundamental Matters of "WARNING!" and "CAUTION!"
WARNING!
Do not use this unit in an area where there is flammable or explosive gas
Never use this unit in an area where there is flammable or explosive gas. This unit is not
explosion-proof. An arc may be generated when the power switch is turned on or off, and
fire/explosion may result. (Refer to page 71 "List of Dangerous Substances".)
Always ground this unit
Always ground this unit on the power equipment side in order to avoid electrical shock due to a power
surge.
If a problem occurs
If smoke or strange odor should come out of this unit for some reason, turn off the power key right
away, and then turn off the circuit breaker and the main power. Immediately contact a service
technician for inspection. If this procedure is not followed, fire or electrical shock may result. Never
perform repair work yourself, since it is dangerous and not recommended.
Do not use the power cord if it is bundled or tangled
Do not use the power cord if it is bundled or tangled. If it is used in this manner, it can overheat and
fire may be caused.
Do not process, bend, wring, or stretch the power cord forcibly
Do not process, bend, wring, or stretch the power cord forcibly. Fire or electrical shock may result.
Substances that can not be used
Never use explosive substances, flammable substances and substances that include explosive or
flammable ingredients in this unit. Explosion or fire may occur. (Refer to page 71 "List of Dangerous
Substances".)
Do not disassemble or modify this unit
Do not disassemble or modify this unit. Fire or electrical shock or failure may be caused.
Do not touch high-temperature parts
The inside of the body or the door may become hot during and just after operation. It may cause burns.
CAUTION!
During a thunder storm
During a thunderstorm, turn off the power key immediately, then turn off the circuit breaker and the main
power. If this procedure is not followed, fire or electrical shock may be caused.

4
Before Using this unit
Requirements for Installation
WARNING!
1. Always ground this unit
•The DNF400 and DNF600 types use a 100V power source.
•The DNF600 type does not contain a power plug. Please consult your local electrical
contractor for power connecting work.
•The DNF410, DNF610, DNF810 and DNF910 types use a single-phase 200V power source.
Please consult your local electrical contractor for power connecting work.
•Be sure to connect the earth wire (the green cable of power cord) to the grounding conductor
or ground terminal to prevent accidents caused by electric leakage.
•Do not connect the earth wire to gas or water pipes. If not, fire disaster may be caused.
•Do not connect the earth wire to the ground for telephone wire or lightning conductor. If not,
fire disaster or electric shock may be caused.
•Do not use a branching receptacle, which may cause the heat generation.
2. Choose a proper place for installation
•Do not install this unit in a place where:
♦Rough or dirty surface.
♦Flammable gas or corrosive gas is generated.
♦Ambient temperature exceeds 35°C.
♦Ambient temperature fluctuates violently.
♦There is direct sunlight.
♦There is excessive humidity and dust.
♦There is a constant vibration.
•Install this unit on a stable place
with the space as shown below.
The exhausted opening is provided
on the back surface. Keep away
from it during operation.
DNF400/410
65cm or more
DNF600/610
80cm or more
or more
30cm
30cm or more
30cm
or
more
15cm
or
more
or more
30cm
30cm or more
80cm or more
30cm or more
30cm or more
or more
30cm
70cm or more
DNF400/410/600/610 DNF810
DNF910

5
Before Using this unit
Requirements for Installation
3. Do not use this unit in an area where there is flammable or explosive gas
(Refer to page 71 "List of Dangerous Substances".)
•Never use this unit in an area where there is flammable or explosive gas. This unit is not
explosion-proof. An arc may be generated when the power switch is turned ON or OFF, and
fire/explosion may result.
•Never use explosive substances, flammable substances and substances that include explosive
or flammable ingredients in this unit. Explosion or fire may occur.
Explosive
gas
Flammable gas
Explosive
substance
Flammable substance

6
Before Using this unit
Requirements for Installation
4. Do not modify 5. Installation on horizontal surface
•Modification of this unit is strictly
prohibited. This could cause a failure.
•Set this unit to the flattest place. Setting
this unit on rough or slope place could
cause the vibration or noise, or cause the
unexpectible trouble or malfunction.
改造
CAUTION!
6. Do not make an overload 7. Do not set samples in close formation
•The withstand load of shelf is 15kg
（uniform load）Set the samples apart
each other.
•The temperature in furnace cannot be
controlled if too much samples are set
there. Make sure to use the shelf and
set samples apart each other so as to
make the free space of 30% or more to
the furnace to acquire accuracy of
temperature.
Make the free space of 30% or more
Do not
modify
Samples
Shelf
15Kg