SECTION 2: DESCRIPTION
AIR N ARC
®
300 SERIES ALL-IN-ONE POWER SYSTEM
®
PAGE - 24
090010-OP_r0
For procedure on pressure control switch adjustment,
see
Section 6.5.15
.
2.2.8 OIL RESERVOIR AND PRIMARY AIR/OIL
SEPARATOR
The main casting of the compressor unit, which contains
the screw compressor, is also the oil reservoir and
primary oil separation unit. The initial (primary) oil
separation is caused by both changes in velocity and
direction. The main casting also contains the oil fill tube
and drain hose assembly. A separate oil reservoir is not
required.
2.3 OIL COOLING SYSTEM
See
Figure 2-7
. The oil cooling system is designed to
provide cooling for the compressor lubricant. The cooling
system also allows for the compressor lubricant
temperature to be maintained to a minimum of
approximately 160°F (71°C). The elevated temperature
forces the moisture, which may be ingested into the
compressor system due to atmospheric humidity, to stay
in a state of vapor. This prevents the moisture from
condensing out in the system and contaminating the
lubricant.
The cooler core for the 300 Series Power System relies
on the cooling fan to suck fresh air from outside the
package across the core to cool the compressor
lubricant. The maximum lubricant temperature is
maintained by using an electric fan temperature switch.
This switch activates the cooling fan when it is required to
cool the compressor lubricant. The fan temperature
switches are set to turn on the fans at about 180°F
(82°C). In addition, the fan will run to cool the enclosure
when the enclosure’s interior temperature reaches 100
°F (38°C).
The oil cooling system is composed of the following main
components:
2.3.1 FAN TEMPERATURE SWITCHES
See
Figure 2-8
.
The fan temperature switches are
located as follows: the enclosure thermostat (100°F) on
System Component or
Component Group
Manual
Section
Location
OIL COOLING SYSTEM
2.3
page 24
Fan Temperature Switch
2.3.1
page 24
Compressor Spin-on Oil Filter
2.3.2
page 25
Figure 2-7: Oil Cooling System
KEY
DESCRIPTION
A
ADJUSTABLE PRESSURE
SWITCH
B
BATTERY
Figure 2-6: Adjustable Pressure
Switch
A
B
