Miller Electric CBI 801D - Manual (Page 13)

OM-166 941 Page 8
3-1. DUTY CYCLE
The duty cycle of a welding generator is the percentage
of a ten minute period that a welding generator can be
operated at a given output without causing overheating
and damage to the unit. This welding generator is rated
at 100 percent duty cycle when operated at 800 am-
peres. This means that the welding generator can be op-
erated at 800 amperes continuously without causing
damage to the unit.
3-2. VOLT-AMPERE CURVES (Chart 3-1)
The volt-ampere curves show the voltage and amper-
age output capabilities of the welding generator at mini-
mum and maximum of each coarse range. Curves of
other settings fall between the curves shown.
Chart 3-1. Volt-Ampere Curves
SB-168 387
3-3. DESCRIPTION
This unit is a constant current (CC) dc arc welding gen-
erator designed for use with the Shielded Metal Arc
Welding (SMAW), Flux Cored Arc Welding (FCAW),
and Air Carbon Arc Cutting And Gouging (CAC-A) pro-
cesses.
The unit is equipped with a four-cylinder, air-cooled,
Deutz diesel engine (F4L-912). The air compressor in
this unit is mounted on the front of the engine, and it op-
erates whenever the engine is running. The compressor
delivers 12 cfm of air at a pressure of 100 psi (see Chart
3-2).
In addition to welding and air compressor operation, this
unit can provide up to 3 kVA/kW of 120 volts (26 am-
peres) ac electrical power for operating 50/60 Hz or 60
Hz auxiliary equipment while welding.
This unit is specially prepared for operation in harsh and
corrosive environments.
An optional Ether Starting Aid can be provided on the
welding generator and is covered within this Owner’s
Manual.
Chart 3-2. Air Output Curve
SB-143 883
SECTION 4 − INSTALLATION OR RELOCATION
IMPORTANT: Unless otherwise specified, all direc-
tions, such as left or right, are with respect to the opera-
tor facing the welding generator front panel.
4-1. LOCATION (Figure 3-1)
A proper installation site should be selected for the weld-
ing generator if the unit is to provide dependable service
and remain relatively maintenance free.
WARNING: ENGINE EXHAUST GASES can
kill.
•
Operate in open, well-ventilated areas or if
operated indoors, vent engine exhaust out-
side the building.
•
Keep engine exhaust vent outlet away from
building air intakes.
CAUTION: RESTRICTED AIRFLOW causes
overheating and possible damage to inter-
nal parts.
•
Maintain at least 18 inches (457 mm) of unre-
stricted space on all sides of unit, and keep
underside free of obstructions.
•
Do not place any filtering device over the
intake air passages of this welding generator.
Warranty is void if any type of filtering device is
used.
The service life and operating efficiency of this
unit are reduced when the unit is subjected to
extreme levels of dust, dirt, moisture, corrosive
vapors, and extreme heat.