Amron AMCOMMAND Il User manual

Instruction Manual
For
Amron International Diving Supply, Inc.
Model 8225-HP & 8225-HP2 AMCOMMAND Il
Two Diver Air Control Systems
S/N______________________
This manual and the information contained herein is provided for use as an operation and
maintenance guide. No license or rights to manufacture, reproduce, or sell either the manual or
articles described herein are given. Amron International Diving Supply, Inc. reserves the right to
change specifications without notice.
Amron International Diving Supply, Inc.
1380 Aspen Way
Vista, California 92081 U.S.A.
Phone [phone] ¥Fax [phone]
Email: [email protected]
Website: www.amronintl.com
Copyright © 2005, Amron International, Inc.
Revised December 2011

TABLE OF CONTENTS
SECTION
Specifications 1
Air Control.....................................................................................................................1.1
Depth Monitoring...........................................................................................................1.2
Communications ...........................................................................................................1.3
Enclosure......................................................................................................................1.4
General Information 2
Description....................................................................................................................2.1
Air Control.....................................................................................................................2.2
Depth Monitoring...........................................................................................................2.3
Low Pressure Alarm Module.........................................................................................2.4
Communications ...........................................................................................................2.5
Diving Safety and Regulations 3
Diving Safety & Regulations..........................................................................................3.1
Personnel Requirements...............................................................................................3.2
Air Supply Requirements ..............................................................................................3.3
Calibration, Service and Inspection...............................................................................3.4
Options 4
Warranty and Service Policy 5
Limited Warranty...........................................................................................................5.1
Service Policy................................................................................................................5.2
Controls and Connections 6
General .........................................................................................................................6.1
Air Control.....................................................................................................................6.2
Drawing, Air Control Front Panel Model 8225-HP ........................................................6.3
Depth Monitoring (Pneumo)..........................................................................................6.4
Low Pressure Alarm......................................................................................................6.5
Drawing, Pneumo Front Panel Model 8225-HP............................................................6.6
Communications ...........................................................................................................6.7
Drawing, Communicator Front Panel Model 2825A-8225.............................................6.8
I

TABLE OF CONTENTS
SECTION
Pre-Dive Procedures 7
Pre-Dive Set-Up ...........................................................................................................7.1
Pre-Dive Check-Out......................................................................................................7.2
Pre-Dive Pneumo Test..................................................................................................7.3
Pre-Dive Communications Test ....................................................................................7.4
Connecting Diver Umbilical...........................................................................................7.5
Low Pressure Supply....................................................................................................7.6
Operating Procedures 8
Low Pressure Breathing Air ..........................................................................................8.1
High Pressure Breathing Air..........................................................................................8.2
Pre-Operation Check List..............................................................................................8.3
Pneumo Readings.........................................................................................................8.4
Diver Communications..................................................................................................8.5
2-Wire Operation...........................................................................................................8.6
Diagram, Set-Up Instructions (Figure 3) .......................................................................8.7
Simulcom (4-Wire) Operation........................................................................................8.8
Diagram, Simulcom 4-Wire Connection, Model 2825-8225 (Figure 4) .........................8.9
Simulcom - What, Why and How? ..............................................................................8.10
What is Simulcom? .....................................................................................................8.11
To Operate and/or Check-Out Simulcom....................................................................8.12
Theory of Operation 9
Mechanical....................................................................................................................9.1
Flow Diagram, (8225-HP) Air Control ...........................................................................9.2
Electrical........................................................................................................................9.3
Functional Block Diagram (2825-8225).........................................................................9.4
Maintenance 10
Review of Scheduled Maintenance.............................................................................10.1
Scheduled Maintenance..............................................................................................10.2
Trouble Shooting & Repair 11
General Information ....................................................................................................11.1
Air Control...................................................................................................................11.2
Depth Monitoring.........................................................................................................11.3
Diver Communications................................................................................................11.4
Problems and Probable Causes .................................................................................11.5
II

TABLE OF CONTENTS
III
SECTION
Reference Material 12
Dive Log, U.S. Navy (Chart)........................................................................................12.1
Repetitive Dive Worksheet..........................................................................................12.2
No Decompression Limits...........................................................................................12.3
Gauge Pressure for Depth of Seawater & Fresh Water..............................................12.4
Equivalent Depths of Seawater & Fresh Water...........................................................12.5
Drawings 13
Schematic Diagram-Model 2825A-8225.....................................................................13.1
Parts Identifier, 2832-202............................................................................................13.2
Schematic Diagram- 28FDW OPTION........................................................................13.3
Schematic and Parts Locator-Model 2324-202...........................................................13.4
Parts Locator- Pneumo Front Panel 8225-200 ...........................................................13.5
Parts Locator - Pneumo Back Panel 8225-200...........................................................13.6
Parts Locator - Air Control Front Panel 8225-400HP..................................................13.7
Parts Locator - Air Control Back Panel 8225-400HP..................................................13.8
Parts Locator - Air Control Front Panel 8225-400HP2................................................13.9
Parts Locator - Air Control Back Panel 8225-400HP2..............................................13.10
Parts Locator - Diver Communications 2825A-8225-28FDW ...................................13.11
Parts Locator - Regulator 8000-0201........................................................................13.12
Parts List 14
Amcomand II Air Control System, Model 8225-HP.....................................................14.1
Amcomand II Air control System, Model 8225-HP2....................................................14.2
8225-200 Pneumo Panel Assembly............................................................................14.3
8225-300 Case Assembly...........................................................................................14.4
8225-400HP Air Control Panel Assembly, Model 8225-HP........................................14.5
8225-400HP2 Air Control Panel Assembly, Model 8225-HP......................................14.6
8225-500 Yoke/Hose Assembly..................................................................................14.7
8000-0201 Regulator, Pressure Reducing..................................................................14.8
2825A-8225-400M Front panel Assembly...................................................................14.9
2405-28 Microphone, Push to Talk...........................................................................14.10
2823-602 External Charger Assembly......................................................................14.11
Recommended Spare Parts......................................................................................14.12
Repair & Calibration Log 15
Repair and Maintenance Log......................................................................................15.1
Gauge Calibration Log................................................................................................15.2

SPECIFICATIONS
AIR CONTROL 1.1
High Pressure Input
Input Pressure Range.............. 500-3000 PSI with standard CGA850 Yoke Connections
***500-4500 PSI with optional 300 Bar DIN Adapters
Inlet Valve (Source Select)...............................................................................................2
Gauge - 0-5000 PSI............................................................................. Accuracy +/- 1.5%
Check Valve, prevents reverse inlet flow.........................................................................2
Input Filter, In Line Pre Regulator......................................................................50 Micron
CGA850 Yoke connections with 6ft. High-pressure hose whips (standard).....................2
***Available with optional 300 Bar DIN Adapters, Amron Part No. SAA5300
High Pressure Regulator, Tescom
Outlet Pressure Range.......................................................................................0-265 PSI
High Flow.............................................................................................................Cv = .24
Max Pressure......................................................................................................4500 PSI
Low Pressure Input, with Check Valve
Max Pressure........................................................................................................285 PSI
Inlet Connection (#6 JIC) .................................................................................................1
Diver Outlet Connection, (O2 Fitting)...............................................................................2
Diver Outlet Valve............................................................................................................2
Air Pressure Gauge, 0-400 PSI ........................................................... Accuracy +/- 1.5%
Over Pressure Relief Valve Set Pressure.............................................................285 PSI
Universal Storage Block - CGA850 Yoke & 300 Bar DIN
HP hoses and CGA850 yokes or optional 300 BAR DIN connections are secured to
universal storage blocks mounted on air control panel located inside of unit.
Panel
Material ......................................................................................................Stainless Steel
Powder Coating......................................................Black Textured Semi-Gloss Polyester
Silkscreen Graphics ............................................................................Red, White & Blue
1

SPECIFICATIONS
2
DEPTH MONITORING (PNEUMO) 1.2
Pneumo Gauge, 3D Precision
Mirrored Scale, 6 Inch......................................................................................................2
Range .........................................................................Dual Scale 0-250 FSW/0-76 MSW
Divisions.................................................................................................................. 1 Foot
Accuracy .............................................................................................0.25% of Full Scale
Pneumo Valve
Regulating Valve, KEL-F Seat .........................................................................................2
Outlet Connection
O2 Fitting Chrome Plated Brass ......................................................................................2
Low Pressure Alarm
Audio Range, 22.5-125 PSI .......................................................... Factory Set at 100 PSI
Panel Material
Material ..............................................................................................................Aluminum
Powder Coating......................................................Black Textured Semi-Gloss Polyester
Silkscreen Graphics ...............................................................................................Yellow
COMMUNICATIONS 1.3
AMCOM II, Model 2825A-8225 2-Diver Communicator
Operating Voltage................................................................................................12 V DC
Power .............................................................................................Rechargeable Battery
or External Power..................................................................................................12 VDC
Operating Time ......................................................................................Nominal 60 Hour
Charger ........................................................................................................ 110/220 Volt
Frequency Response ...................................................................................300-7500 Hz
Audio Power..........................................................................................................12 Watt
Panel................Black Powder Coat over Stainless Steel with White Silkscreen Graphics
ENCLOSURE 1.4
Case Material
Pressure molded fiberglass, with aluminum and or stainless steel hardware. Includes
carrying handle, latches, and stay hinge to lock unit in open position (upper section is
locked upright in respect to lower section).
Case
Lid closed....................................................................................... 20" W x 14" D x 12" H
Lid Open......................................................................................... 20" W x 14" D x 21" H
Weight: ...........................................................................................Approximately 70 lbs.
Color: ..................................................................................................International yellow

GENERAL INFORMATION
DESCRIPTION 2.1
The AMRON AMCOMMAND II Model 8225-HP & 8225-HP2 is a portable self contained two diver
high and low pressure air control, communication and depth monitoring (pneumo) system, for
surface supplied diving operations. The system is designed to provide a central control point for the
supply of breathing air to the divers, monitor the diver’s depth, and provide two way communications
between the divers and the surface. The system is a housed in a durable pressure fused fiberglass
case, which provides a convenient, compact, rugged, professional system.
AIR CONTROL 2.2
The Air Control Section consists of two high pressure inputs, a single low pressure input, and two
diver air connections.
Standard 3000 PSI MAX Input
Model 8225-HP & HP2 comes standard with 2 each 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 maximum
input pressure limit to 4500 PSI. Simply remove CGA850 yoke nut and yoke from bleeder
body, screw on 300 Bar DIN adapters, and tighten with a wrench.
Each input has a shut off valve and 0-5000 psi gauge.
Check valves provide protection against back flow of air from a full bottle to an empty, when
switching HP bottles. High-pressure air is reduced to desired low pressure via a Tescom adjustable
regulator. The input to the regulator is protected against contamination by a 50-micron filter.
Regulator output pressure is adjustable over the range of 0 to 285 psi; a 2 1/2" 0-400 PSI gauge
monitors the output pressure. The unit has an over pressurization relief valve, factory set to 285 psi.
The low-pressure input is #6 JIC (3/8), and has a check valve to permit simple switch over from low-
pressure air to high-pressure air.
Divers air line connection is O2type fitting; control is via two 1/4 turn ball valves permitting
unrestricted flow.
DEPTH MONITORING 2.3
The diver’s pneumo connection is O2type fitting, pneumo valves are regulating type. Pneumo
gauges are, 6" high precision 0.25% of full-scale accuracy, dual scale 0-250 FSW/0-76 MSW with 1
foot increments. Gauge protectors are provided for each pneumo gauge.
3

GENERAL INFORMATION
4
LOW PRESSURE ALARM MODULE 2.4
Low Pressure Alarm Module supplies a loud audio signal to alert the operator when a diver's air
pressure falls below a preset limit of 100 PSIG.
COMMUNICATIONS 2.5
The diver communication system is based on the field proven AMRON Model 2825. The unit is
powered from internal rechargeable gel cell batteries, battery charger provided. Operating time from
fully charged battery is approximately 60 hours. Unit can also be operated from an external 12 V DC
source, via charger jacks on the front panel. The communicator has a unique battery condition
indicator; Steady GREEN light indicates battery voltage level is good. Blinking GREEN light
indicates battery voltage is approaching a low level (approx 2-4 hours of operation remain). Steady
RED light indicates battery voltage is below the level necessary to guaranty proper operation.
WARNING: When Battery Condition indicator is steady RED light, communication will stop. The
battery condition indicator also functions in the same manner when operating from an external power
source.
Possibly the most useful feature of the AMCOMMAND communicator is the ability to operate the unit
remotely. This feature allows the use of a hand held push to talk microphone (included), or a walk
and talk type module (optional). This allows the tender (operator) to move about and still maintain
contact with the divers.
The use of the noise canceling push to talk microphone automatically disconnects the speaker when
talking to the divers cutting out the majority of the background noise, greatly improving the
intelligibility of communications.
The communicator provides 12 watts voice power. This power level provides the volume necessary
to communicate clearly even under difficult conditions. Standard controls include; power on/off,
tender volume, diver volume, speaker on/off, 5-way binding post diver input, push to talk switch,
headset/microphone jack, and remote push to talk jacks.
28/FDW Wireless Tender Option
Models 8225-HP/28/FDW & 8225-HP2/28/FDW Amcommand II comes with the Amron 2 Diver
Deluxe Communications System with Wireless Tender. This feature allows the tender (operator) to
be completely mobile around the dive sight while still remaining in constant contact with the divers.
The wireless tender is a full duplex (SIMULCOM) system. The system comes complete with a
built-in transceiver module with antenna and one wireless headset with clip-on belt module. The
system allows unlimited headsets for listen only. The unit operates FM at 49 MHz. The range is up
to 1/4 mile and uses one 9 volt battery.

SAFETY & REGULATIONS
DIVING SAFETY & REGULATIONS 3.1
Safe Diving does not happen by accident. There are few occupations in the world, which require such a
broad range of knowledge and training as diving. There are many diverse factors, which can affect
diving safety i.e., planning, weather, equipment, location, water conditions, as well as the type of work
being done. The single most important factor in eliminating accidents is planning and attention to detail.
Diving knowledge, training and experience are fundamental elements needed to execute a safe dive.
The following reference materials are recommended as sources of information for running a safe
diving operation:
1. U.S. Department of Labor, OSHA Regulations 1910.401 Sub-part T–Commercial
Diving Operations.
2. U.S. Navy Diving Manual.
3. Divers Handbook of Underwater Calculations.
Diving regulations
Several codes and regulations cover diving operations and procedures. In the United States most
commercial diving operations are covered by the OSHA (Occupational Safety and Health Administration)
regulations, or Individual State regulations, which are adopted from the federal regulations, and made a
part of the civil code.
While government agencies are exempt from OSHA regulations, they generally fall under other
regulations, which are similar or stricter than OSHA. If they are completely exempt, they must still abide
by the procedures for operating a safe dive.
While no agency (within the U.S., for commercial diving operations) tests or approves equipment for use,
they do establish minimum standards, which should be followed. The suitability of a given piece of
equipment for a particular task is left to the supervisor of the dive. The following information is extracted
from the OSHA regulations for commercial diving operations.
NOTE: The information is not presented as a direct or complete quotation, but rather as our
interpretation of the regulations. Each diving supervisor should obtain a copy of these regulations for
their own use.
Copies of the complete section of Commercial Diving Operations are available from Amron International
for a nominal charge.
WARNING: DO NOT USE THE AMCOMMAND II FOR THE FOLLOWING
1. Mixed gas diving operations with an oxygen level greater than 40%.
2. Oxygen or oxygen enriched breathing mixtures above 40%.
The AMCOMMAND II is not designed or intended for these applications.
5

SAFETY & REGULATIONS
PERSONNEL REQUIREMENTS 3.2
1. Each dive team member shall have the experience or training necessary to perform assigned
tasks in a safe and healthful manner. The person operating the AMCOMMAND II must be
trained in the proper operating procedures, and emergency operating procedures.
2. It is the responsibility of the designated person in charge of the diving operation to be on-site
at all times. He is responsible for all aspects of the diving operation affecting the safety and
health of dive team members.
3. The dive shall be terminated when:
1. A diver requests termination.
2. A diver fails to respond to instructions.
3. Diver communications are lost and can not be re-established quickly.
4. A diver begins to use diver carried back-up breathing air, or location reserve breathing air.
5. Operational conditions deteriorate to a point where safe diving can not be guaranteed.
AIR SUPPLY REQUIREMENTS 3.3
WARNING
Regardless of the type of air supply being used for surface supplied diving; the diver must always have a
back-up supply of air. Generally this is in the form of a bailout bottle. The back-up air supply must be
adequate to return the diver to the surface, if the dive requires in-water decompression this must be
accounted for also.
1. The diver's air supply may originate from a low-pressure air compressor, high-pressure air cylinders,
or a combination of both. Regardless of the source, the air must meet certain established standards
of purity and must be supplied in an adequate volume for breathing.
2. The air supply requirements depend upon the specific factors of each dive such as depth, duration,
level of exertion, and type of diving system (helmet/hat) being used. It is the dive supervisor's
responsibility to ensure that an adequate supply of air is available and on site for the planned dive.
This includes sufficient back-up air to safely return the diver to the surface in the event the primary
supply of air is lost.
3. Low-pressure compressors used for breathing air should be specifically designed for diving.
Compressors used to supply air to the divers shall be equipped with a volume tank which has a
check valve on the inlet side, a pressure gauge, relief valve, drain valve, and a proper filtration
system. The output of the air compressor system shall be tested for air purity every 6 months by
means of an air sample.
4. Air compressor intakes shall be located away from and up-wind of, areas containing exhaust or other
contaminants.
5. NOTE: OSHA Regulations require a decompression chamber capable of recompressing the diver
at the surface to a minimum of 165 FSW (6 ATA) shall be available at the dive location for a
surface-supplied air diving to depths deeper than 100 FSW.
6