REPAIR & ADJUSTMENTS
6.6
is to set the min-volume adjustment for the maximum flow without peaking
over 60 amps.
You will adjust the min-volume screw clockwise to increase the minimum flow
which will increase the amp load and raise the peak amp reading on the ammeter. If
the peak amp draw is above 60 amps as a result of the initial setting or your adjust-
ment attempt then you can easily lower the setting by turning the minimum volume
adjustment screw counter clockwise.
Note: The minimum volume adjustment screw turns much easier when CR17 is en-
ergized and the pump is shifted to max-volume.
Operation
1. When the operation controls are set in automatic operation and "A" cylinder, "B"
cylinder or "Both" cylinders have been selected for operation. The cycle is initi-
ated by pushing the "start button".
2. The directional control valve #20 will energize and shift to extend the cylinder.
The cylinder will begin advancing because:
A. Pump #1 shifts to full flow (60 GPM)
B. Pump #2 shifts to high flow (25 GPM)
C. Dump valve #28 closes (time delay)
D. Valve #26 (decompression/excess flow) is off
3. As the cylinder advances the resistance created by the C02 gas being compressed
and the snow packing will cause the system pressure to raise to 650-700 PSI then
pump #1 (60 GPM) compensates to a no flow condition and pump #2 (25 GPM)
high flow setting is advancing the cylinder until it reaches 2900 PSI and the
pump #2 pressure switch trips and shifts the pump #2 volume setting to min-
volume (18 GPM) and also shifts the pump #1 solenoid control to 450 PSI
(unload pressure).
To Next Page
Loading...