![background image](http://html1.mh-extra.com/html/aqua-lung/phods/phods_technical-manual_2958557004.webp)
PHODS Technical Manual
4
INTRODUCTION
This manual provides factory prescribed procedures for
the correct service and repair of this Aqua Lung product.
It is not intended to be used as an instructional manual for
untrained personnel. The procedures outlined in this manual
are to be performed only by personnel who have received
Factory Authorized training through an Aqua Lung Service
& Repair Seminar. If you do not completely understand all of
the procedures outlined in this manual, contact Aqua Lung
to speak directly with a Technical Advisor before proceeding
any further.
SCHEDULED SERVICE
This product should be given the same care and maintenance
as life support equipment. It is therefore important to perform
scheduled overhaul service for the complete unit, according
to the procedures outlined in this manual on a regularly
scheduled basis;
once every 12 months
by a factory trained
service technician,
.
GENERAL GUIDELINES
1.
In order to correctly perform the procedures outlined in
this manual, it is important to follow each step exactly in the
order given. Read over the entire manual to become familiar
with all procedures before attempting to disassemble the
product in this manual, and to learn which specialty tools and
replacement parts will be required. Keep the manual open
beside you for reference while performing each procedure.
Do not rely on memory.
2.
This is an Oxygen Delivery System. Cleanliness MUST
be maintained at all times. Powder free latex or nitrile gloves
MUST be used for all internal assemblies. All service and
repair should be carried out in a work area specifically set up
and equipped for the task. Adequate lighting, cleanliness, and
easy access to all required tools are essential for an efficient
repair facility. Prior to beginning service review
Procedure
A: Oxygen Cleaning and Lubricating
.
3.
As each unit is disassembled, reusable components should
be segregated and not allowed to intermix with nonreusable
parts or parts from other units. Delicate parts, including inlet
fittings and crowns which contain critical sealing surfaces,
must be protected and isolated from other parts to prevent
damage during the cleaning procedure.
4.
Use only genuine Aqua Lung parts provided in the overhaul
parts kit for this product. DO NOT attempt to substitute an
Aqua Lung part with another manufacturer’s, regardless of
any similarity in shape or size.
5.
Do not attempt to reuse mandatory replacement parts under
any circumstances, regardless of the amount of use the product
has received since it was manufactured or last serviced.
6.
When reassembling, it is important to follow every torque
specification prescribed in this manual, using a calibrated
torque wrench. Most parts are made of either marine brass or
plastic, and can be permanently damaged by excessive stress.
7.
Only use Christo-Lube
®
MCG-111, this lubricant is compatible
with oxygen systems. Apply only a light film of Christo-Lube
®
MCG-111 to o-rings, avoid excessive amounts of lube. Do not
lubricate any other parts unless specifically instructed to do so
in this manual.
Pinch Method
Press upwards on sides of o-ring to
create a protrusion. Grab o-ring or
insert o-ring tool at protrusion.
2.
When instructed to
“OPEN”
the handwheel, turn the
handwheel counter-clockwise. The
red indicator ring will
not be visible
in the handwheel window, this indicates the
unit is in the
“ON”
position.
When instructed to
“CLOSE”
the handwheel, turn the
handwheel clockwise. The
red indicator ring will be visible
in the handwheel window, this indicates the unit is in the
“OFF”
position.
3.
When instructed to disconnect or reconnect the OPC hose
to the CPC connector, use the following method:
Disconnect:
Depress the button on the CPC connector to
remove the OPC hose.
Reconnect:
Insert the OPC hose into the CPC connector,
making sure the button “Pops Up”. Check that the OPC hose
is firmly attached prior to pressurizing the system.
4.
The following acronyms are used throughout the manual:
LP
is
Low Pressure;
MP
is Medium Pressure; and
HP
is High Pressure.
5.
Numbers in parentheses reference the key numbers on the
exploded parts schematic.
For example
, in the statement, “...
remove the o-ring (3) from the...”, number 3 is the key number
to the piston head o-ring.
6.
When instructed to remove an o-ring, use the pinch method
(see illustration below) or use a brass or plastic o-ring removal
tool. Avoid using hardened steel picks (unless directed), as they
may damage the o-ring sealing surface. All o-rings that are
removed are discarded and replaced with brand new o-rings.
WARNING:
Oxygen can be highly explosive and is dan-
gerous if misused. Ensure the cylinder valve is opened
slowly. Use eye and ear personal protective equipment
when performing any tests involving an oxygen system.
See Procedure A: Oxygen Cleaning and Lubricating.
GENERAL CONVENTIONS
Unless otherwise instructed, the following terminology and
techniques are assumed:
1.
When instructed to
remove
,
unscrew
or
loosen
a
threaded part, turn the part counter-clockwise.
When instructed to
install
,
screw
or
tighten
a threaded
part, turn the part clockwise.