5
2. PRE-OPERATION PROCEDURES
Installation Precautions & Procedures
4. Check stability.
Unit may tip over or fall, causing injury or death during an earthquake or other unforseen
incident. Be sure to stabilize unit properly (adjustable leveling feet securely positioned, etc.) to
assure safe operation and a safe work area.
5. Install in a well-ventilated area.
Install unit so that side panel heat vents (see “Unit Exterior” on P.8 for location) are unobstructed
and allowed to sufficiently diffuse heat. Failure to do so may result in excessive temperatures
inside the unit control panel, causing possible degraded CPU board performance, malfunction
or fire. See installation specifications above.
6. Install in a dry location.
Install unit where it will be free from liquid spray and other moisture. Failure to do so may result
in control mechanisms becoming wet, causing malfunction, electrical shock and/or fire.
7. Install in a location free of flammables and explosives.
Never install near flammables or explosives. Unit is NOT fire or blast resistant. Simply switching
the main power switch (ELB) “ON” or “OFF” can produce a spark, which could relay during
operation, causing a fire or explosion when near flammable or explosive fluids, chemicals or
gases/fumes. See “List of Hazardous Substances” (P.67).
8. Connect to a proper power supply terminal.
Connect power cable to a suitable facility outlet or terminal, according to the following electrical
requirements.
DF412 220V AC single phase 50/60Hz 12.5A (ELB capacity: 15A)
DF612 220V AC single phase 50/60Hz 17.5A (ELB capacity: 20A)
DH412 220V AC single phase 50/60Hz 15.5A (ELB capacity: 20A)
DH612 220V AC single phase 50/60Hz 21.5A (ELB capacity: 30A)
Standard test conditions with no load should be as follows. Operational voltage range: ±10%,
Voltage range at which specified performance is guaranteed: ±5%, Frequency rating: ±1%,
Atmospheric pressure range: 86kPa ~ 06kPa, Ambient temperature: 23±5: Humidity: 65±5%.
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.
Multiple power cables connected to a single outlet may cause unit input voltage to drop,
resulting in degraded heating and temperature control performance.
9. Observe wire color designation when connecting to facility terminal.
Confim that the facility main breaker is OFF before
connecting the round terminals from the power cable. No
power plugs or connectors of any kind are included with
DN411H/611H. Where required, purchase an appropriate
plug and properly connect using the round terminals.
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