F-1031, Section 2119
Page 18 of 24
Air Compressor Pressure Mode: FIXED
Air pressure is maintained at a preset pressure setting (150 psi / 10.3 bar)
With the compressor engaged, running and the Auto-
Sync control panel switched to “Fixed”, the following oc-
curs:
·
The yellow and black solenoids are energized and are
CLOSED.
·
The master pressure gauge registers compressor
sump tank pressure.
·
The shuttle valve is closed. The compressor inlet
pressure is lower than the compressor discharge
pressure.
·
The balance valve does not directly influence the air
circuit operation.
·
The fixed air regulator controls the air circuit and air
inlet valve (see Fixed Air Regulator Valve Function).
·
If the compressor discharge air pressure is above the
fixed air regulator set point (150 psi / 10.3 bar), then
the fixed air regulator opens allowing the control air
pressure to close the air inlet valve (see Air Inlet Valve
Function). This will lower the control air pressure be-
low 150 psi (10.3 bar). When the discharge air pres-
sure is below the set point (150 psi / 10.3 bar), then
the fixed air regulator closes. Now the control air pres-
sure is not high enough to keep the air inlet valve
closed. The air inlet valve opens allowing air into the
compressor raising the control air pressure above 150
psi (10.3 bar).
·
The fixed air regulator opens and closes as the air dis-
charge pressure changes to maintain set pressure.
NOTE: Control air is always being released and pressure relieved through the air inlet trim valve (AITV) and out
the air bleed outlet. This air release is controlled (limited) by the AITV.
Air Compressor Mode: Fixed
Red Hose
Red Hose
Blue Hose
Gray Hose
Water Pressure
Air Pressure
Y
e
ll
o
w
Ho
s
e
Re
d
H
o
s
e
Bl
u
e
H
o
s
e
Black Hose
Yellow Solenoid
(Closed)
Black Solenoid
(Closed)
Master Air Pressure Gauge
Water Pump
Balance Valve
(Closed)
Balance
Trim Valve
(BTV)
Shuttle Valve
(Closed)
Minimum
Pressure
Valve
Air / Oil Separator
Air Inlet
Valve
Air Inlet Valve
from Air Filter
Air Inlet Trim Valve (AITV)
Air Bleed Off
Fixed Air Regulator (Closed)
Oil Scavenger Line
(150 psi / 10.3 bar)
Black Hose
Air Discharge
Manifold
(150 psi / 10.3 bar)
Air
Compressor
