APTech Series AK M86 - Manual (Page 10)

AK M80/86 Manual P/N 00-15000010 Rev 3
5. OPERATION
This section describes operation of the AK M80/86 crossover manifold.
Figure 3. AK M80/86 Installation Schematic
5.1. AK M80/86 Operation
5.1.1. General Principle of Operation
The knob for the crossover regulator has an “IN SERVICE” label with an arrow. When the knob is turned
so that the arrow points toward the B Side (right) cylinder (approximately the 4:30 o’clock position with
the line regulator at 12:00 o’clock position), then the B Side (right) cylinder is the primary gas supply and
the A Side (left) cylinder is the standby gas supply. When the knob is turned so that the arrow points
toward the A Side (left) cylinder (approximately the 7:30 o’clock position), then the A Side (left) cylinder
is the primary gas supply and the B Side (right) cylinder is the standby gas supply.
The crossover regulator is comprised of a fixed outlet pressure regulator and an adjustable (limited range)
outlet pressure regulator. The A Side (left) cylinder supplies the fixed outlet pressure regulator. The B Side
(right) cylinder supplies the adjustable outlet pressure regulator. The adjustable outlet pressure regulator
has the “side selection outlet” knob with the “IN SERVICE” label and arrow. This regulator can be
rotated only 270 degrees to adjust the B Side outlet pressure slightly above or slightly below the A Side
fixed outlet pressure. It is this slight change in B Side outlet pressure that selects which cylinder is
supplying gas and which cylinder is on standby. When the cylinder supplying gas is empty, then it is time
to replace that cylinder using the protocol in Section 5.1.3 or 5.1.4 as appropriate.
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