Amron 8225-HP, Instruction Manual

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CONTROLS & CONNECTIONS
10
GENERAL 6.1
Before using the AMCOMMAND II Model 8225-HP or 8225-HP2, familiarize yourself with its operating
controls and connections. For simplicity, the controls and connections are divided into three categories.
The categories are Air Control, Pneumo, and Communications.
AIR CONTROL 6.2
The Air Control Section consists of a high-pressure section and a low-pressure section. The system is
designed to supply breathing air to a diver through an umbilical. This is known as surface supplied
diving. The air the divers are breathing is supplied from the surface.
A. High Pressure
Accepts breathing air from SCUBA bottles, or any other suitable source, i.e. high-pressure flasks. The
pressure is reduced to a level suitable to the needs of the diver via a pressure-reducing regulator. The
pressure required by the diver is determined by the type of helmet/hat being used and the depth the
diver is working at. The general rule of thumb is bottom pressure plus over-bottom pressure required for
a given type of diving hat/helmet. Consult your diving hat/helmet manufacture/manual for the requirement
of the hat/helmet you are using.
The High Pressure Section has two inputs, complete with high-pressure hose whips, CGA850 SCUBA
bottles yokes, and pressure reducing regulator.
Standard 3000 PSI MAX Input
All models comes standard with 2 each Amron CGA850 yokes attached to 6-foot long HP hoses.
The CGA850 yoke limits the maximum input pressure to 3000 PSI.
Optional 4500 PSI MAX Input
Installing the 300 Bar DIN Adapters, Amron Part No. SAA5300, will increase the 8225-HP and
8225-HP2 to a maximum input pressure limit to 4500 PSI. Simply remove Amron CGA850 yoke
nut and yoke from bleeder body, screw on 300 Bar DIN adapter, and tighten with a wrench.
1.
Source select inlet valve handles are color coded Red and Blue to correspond to the Hose Whips
which are also color-coded Red and Blue. This helps the operator identify which valve controls
which tank. For maximum airflow, turn handle counter clockwise four (4) full turns. To shut-off
valve, turn handle clockwise until it stops.
2. Inlet gauge reads actual input pressure of air source. Gauge pressure range is 0-5000 psi;
accuracy is 1-1/2% of Full Scale.
3. Check valves, (HP section) prevents input air from one source flowing into a second lower
pressure source when both source valves are open. This simplifies the switch over from one
SCUBA bottle to another. NOTE: If both source valves are left open with full bottles the bottles
will be drawn from equally.
4. The Amron CGA850 input yokes are standard with bleed valves and color-coded 6-ft. high-
pressure hose whips. The CGA850 input yokes are limited to maximum pressures of 3000 PSI
and fit standard SCUBA bottle valves.