Scubatech TecLINE R2 TEC User manual

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SCUBATECH
User Manual
Demand regulators
Range of models
R2 TEC, R2 TEC O2, R2 TEC INT, R4 TEC
R4 TEC O2, R4 TEC INT, R5 TEC, V1 ICE
V1 ICE INT, V2
TEC1, TEC1 O2, TEC1 OCTO
TEC2, TEC2 O2, TEC2 OCTO
Issue 2018/2

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Table of contents:
1. Introduction
2. Important warnings
3. Design and basic technical data
4. Intended use
5. Using with nitrox mixture and oxygen
6. Using in cold water
7. Preparing for use
8. The use during diving
9. The use after diving, maintenance and storage
10. Warranty
11. Manufacturer information
12. Notes
Copyright information
These instructions are protected by copyright. All rights reserved. Copying,
reproduction, translation or saving in any electronic medium in whole or in part
without a written consent of Scubatech is forbidden.
Demand Regulator User Manual
Series models – R2 TEC, R2 TEC O2, R2 TEC INT, R4 TEC, R4 TEC O2, R 4 TEC INT
R5 TEC, V1 ICE, V1 ICE INT, V2 ICE, TEC1, TEC1 O2, TEC1 OCTO
TEC2, TEC2 O2, TEC2 OCTO
©2018 Scubatech Ltd.

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Welcome to the world of Scubatech products.
Congratulations on the purchase of our demand regulator. We believe you can enjoy
the parameters of our equipment developed together with our Customers and
produced with the use of advanced technology.
We would like to thank for your choice and wish you many safe dives.
1. Introduction
Before the first use of Scubatech demand regulators you must read carefully and
understand all information presented in this user manual. Please read, understand
and conform to these instructions to use the products presented in this manual in a
safe manner and for many years.
We recommend keeping this user manual for the whole period of using the product.
Scubatech demand regulators may be used only in the way presented in this user
manual.
Scubatech demand regulator is a precise mechanism.
It must be used with care due to its essential function performed during diving. The
guidelines contained in this manual must be observed to ensure the best efficiency
and service life of this regulator.
The manufacturer believes that Scubatech demand regulators' utility values will
make you very satisfied and you will enjoy diving even more.
SCUBATECH shall not be liable for damages caused by non-compliance with the
instructions contained in this manual.
2. Important warnings
CAUTION
Diving is a potentially hazardous activity. The demand regulator's instructions
for use shall not be a substitute of professional diving training carried out by a
qualified instructor.
All demand regulators described in this manual were certified by the body notified by
Polski Rejestr Statków S.A. (Polish Register of Shipping)
and they conform to the requirements of Regulation (EU) 2016/425 of the European
Parliament and of the Council of 9 March 2016 on personal protective equipment and
repealing Council Directive 89/686/EEC and the standard PN-EN 250:2014-08 -
Respiratory equipment — Open-circuit self-contained compressed air diving
apparatus - Requirements, testing, marking. The CE mark denotes conformity to the
requirements and the number 1463 next to the CE mark is an identification code of
the Polish Register of Shipping.

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CAUTION
In the non-member states of European Union, additional requirements
regarding the use of demand regulators may apply. Before using Scubatech
products, please check current requirements that are effective in the country
where you intend to use them.
CAUTION
The content of these instructions is based on knowledge available upon its
release for printing. Scubatech reserves the right to make modifications in any
time.
CAUTION
Demand regulators were tested for conformity to the requirements of the
standard EN 250:2014-08. Demand regulators are not designed for use by more
than one person at the same time. Using demand regulators by more than one
diver at the same time and in cold water conditions may cause the demand
regulators' non-compliance with the requirements of the standard 2005:2014-08
regarding respiratory parameters.
CAUTION
Scubatech demand regulators may be used only with diving cylinders holding
verification certificates compliant with current requirements applicable in the
country where you intend to use them.
CAUTION
Scubatech demand regulators may be supplied only with the air compliant with
the requirements of the standard PN- EN 12021. If moisture accumulates in the
diving cylinder, it may cause possible cylinder corrosion as well as freezing
and malfunctioning of the regulator when diving at low temperatures (below
10°C (50°F)). Diving cylinders should be transported in compliance with local
regulations for transport of hazardous products. The use of a cylinder is
subject to gas and compressed air use regulations.
CAUTION
Please note that deep diving increases the risk of decompression sickness and
other diving sicknesses. Generally, diving below the depth of 40m or
decompression diving is not recommended. If you wish to do deep diving, you
must have special training carried out by a suitable diving centre and have
suitable equipment for this type of diving. Scubatech demand regulators
ensure reliable operation up to the depth of 50m. Nonetheless, divers must
conform to the limits prescribed by the local regulations that are effective at
the place of diving.

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3. Design and basic technical data
Scubatech demand regulators are two-staged diving regulators with pressure
reduction stages separated by an interstage hose. They are composed of a first-
stage pressure reduction (pressure reducing valve), interstage hose and a second-
stage pressure reduction (diving regulator).
The first pressure reduction stages of demand regulators are pressure relief valves.
They are equipped with 2 or 4 reduced pressure ports marked with the letters LP and
1 or 2 high-pressure ports marked with the HP letters. The HP ports have larger
diameter than medium pressure ports. The first pressure reduction stages of
Scubatech demand regulators are also equipped with diaphragm, which protects
operating environment of the high-pressure valve and other valve components
against external conditions. This solution allows for using the valve in extreme
conditions and the regulator is also designed for use by advanced divers.
The main task of the first pressure reduction stages of demand regulators is to
reduce pressure in a diving cylinder (twinset) to the pressure value that corresponds
to the total pressure of ambient pressure (hydrostatic pressure variable depending on
depth) and constant overpressure of 0.9-0.95 MPa.
Figure 1. The first stages of pressure reduction of demand regulators
The second pressure reduction stages of Scubatech demand regulators are based
on a standard, concurrent relief pressure reducing system. They are equipped with a
Venturi nozzle with a setpoint adjusted by a diver that allows delivery of maximum
flow of breathing gases. Using an adjustable deflector that directs appropriately the

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breathing gas flow in combination with the Venturi nozzle reduces substantially
breathing resistance when the breathing mixture flow increases during the increase
of diving depth.
In addition to adjustment of the Venturi effect, the second pressure reduction stages
of Scubatech demand regulators are equipped with a breathing resistance
adjustment knob located on the opposite side of the interstage hose of the diving
regulator's box. When the knob is set in a closed position, taking a breath requires
more strength and the diving regulator is less sensitive to sudden changes of
pressure. Breathing is easier when the knob is twisted off, as it requires less strength
to take a breath. Adjustment is smooth and you can set the knob in the position that
suits you best. When storing a diving regulator equipped with a breathing resistance
adjustment knob, the knob should be set in an open position, which prevents against
damage of the seat.
Figure 2. The second stages of pressure reduction of demand regulators
Interstage hose - a medium pressure hose of operating pressure 1.7 MPa. Metal
ends are connected to the hose with twisted connections that ensure high quality
connection.
Basic technical data:
Tested to depth - 50m
Maximum supply pressure - 30 MPa
Reduced pressure - 9.0 – 9.5 atm
Threads:
Mounting ferrule - DIN 5/8”
High pressure - 7/16” (number depends on a model)
Medium pressure - 3/8” (number depends on a model)

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4. Intended use
Demand regulators presented in this manual are diving air regulators used for
recreational and professional diving. Demand regulators are used with a single diving
cylinder or any air twinset of operating pressure up to 30 MPa (300 atm).
CAUTION
SCUBATECH shall not assume responsibility for malfunctioning of demand
regulators if they have been used contrary to their purpose, if unoriginal spare
parts have been used or if they have been serviced by an authorized person.
5. Using with nitrox
IMPORTANT
Important information regarding the use of demand regulators with nitrox
mixtures is described below.
CAUTION
Diving with the use of nitrox mixtures requires completion of a specialist
training carried out by a qualified instructor.
CAUTION
The maximum operating depth and the time of exposure to nitrox mixtures
depend on oxygen concentration in the used mixture. High oxygen
concentration reduces the use of mixtures with standard diving equipment and
it requires application of materials and procedures that differ from those
required by a user of standard compressed air.
Using demand regulators with nitrox mixtures outside the EU (European
Union).
Standard Scubatech demand regulators sold to non-member EU countries are
produced with the application of materials, assembly procedures and greases that
ensure compatibility with nitrox mixtures of the maximum oxygen content of 40 %.
CAUTION
If before using with nitrox mixtures a demand regulator was used with standard
compressed air, it is recommended to carry out a proper maintenance
procedure. An authorized Scubatech serviceman should provide all required
information.

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Using demand regulators with nitrox mixtures in the EU (European
Union) countries.
Scubatech offers additional models of demand regulators specially produced for use
with nitrox mixtures of oxygen content over 21%, including the use of oxygen. The
above products were tested in accordance with PN-EN 144-3:2005 standards
Respiratory protective devices - Gas cylinder valves - Part 3: Outlet Connections for
diving gases nitrox and oxygen and PN-EN 13949:2005 Respiratory equipment -
Open-circuit self-contained diving apparatus for use with compressed nitrox and
oxygen - Requirements, testing, marking.
Please contact an authorised salesperson of Scubatech products to receive more
information regarding these models.
6. Using in cold water
CAUTION
Cold water diving requires completion of a specialist training carried out by a
qualified instructor.
In accordance with European CEN standardization, the temperature of cold water is
10°C or lower. In such conditions, particularly in fresh water that has higher freezing
point, the risk of freezing of a pressure reducing valve or diving regulator is high. The
usual effects include a constant outflow of breathing gases, and their quicker loss as
a result. The lower the ambient temperature is, the higher the risk of the above
described situation is.
Demand regulators operating at low temperatures must be properly protected.
Isolating a water chamber in a pressure reducing valve from the environment with the
use of an antifreeze agent is the absolute minimum protection required. It is
recommended to use the above system in pressure reducing valves used for diving
at the depth below 30m.
To reduce the risk of freezing of a demand regulator, it is necessary to:
 avoid releasing breathing gases on the surface and underwater at the air
temperatures around 0°C and below,
 not cause activation of a diving regulator,
 avoid simultaneous use of a buoyancy compensator and inflator of a dry suit,
 before and during diving stay on the surface as short as possible at the air
temperatures around 0°C and below,
 avoid quicker use of breathing gases,
 not practice breathing in two persons with the use of a single demand
regulator. Using an additional fully self-contained demand regulator is safer in
emergency situations,
 use clean and dry cylinders filled only in places authorized for this purpose.

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7. Preparing for use
IMPORTANT
Scubatech recommends delivering a demand regulator to an authorized seller
for connecting accessories, such as: a pressure measurement device, medium
pressure tubes and second pressure reduction stages of demand regulators.
An authorized seller may also answer to questions regarding the issues
presented in these instructions.
For proper preparing a demand regulator for use, the following steps must be
performed:
 equip a demand regulator with a device monitoring air pressure in a
cylinder/twinset,
 check if a demand regulator kit is complete,
IMPORTANT
Connecting medium pressure hoses to high pressure outputs and using any
reductions on medium and high pressure hoses
is forbidden.
 arrange properly medium pressure feeding hoses: buoyancy compensator, dry
suit, etc.
 visually inspect the demand regulator's condition,
 check if all connections and a mouthpiece are fastened properly,
 test for tightness under negative pressure in the following way:
o insert the mouthpiece of the second-staged demand regulator to your
mouth,
o clog the air inlet to the first-staged demand regulator,
o take a breath through the second-staged demand regulator,
o the demand regulators are tight only if taking a breath is impossible,
IMPORTANT
Before screwing down a demand regulator to a diving cylinder/twinset, a seat
should be blown through with air. Check if the valve is unobstructed and clean.
Check if there is O-ring in the pressure reducing valve's ferrule and check its
condition. If the seal is damaged or worn out, it must be obligatorily replaced.
 screw down the demand regulator to the diving cylinder's/twinset's seat, lightly
tightening, AND NOT APPLYING TOO MUCH PRESSURE,
 slowly unscrew the cylinder's shut-off valve (valves),
CAUTION
When opening the cylinder's/twinset's shut-off valve, the front of the pressure
gauge should not be directed towards a user or other persons in case of its
malfunctioning.

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 before diving, perform a routine check of the demand regulator,
 listen to all the demand regulator's connections for possible air outflow,
 check if the air feeding the regulator has an unpleasant smell,
 push the diving regulator's inflate button and check for air outflow that stops
after releasing the inflate button,
 insert the diving regulator's mouthpiece to your mouth and take a few quick
breaths, looking at the pressure gauge or other monitoring device. The
monitoring device's indications should not change,
 test for water tightness, before submerging, insert the diving regulator's
mouthpiece to your mouth, clench your teeth and then seal the connection
between your oral cavity and a mouthpiece with your mouth.
8. The use during diving
 if the second-stage pressure reduction is equipped with Venturi effect's
adjustment system, the adjusting knob must be set in the position MAX, DIVE
or + during diving,
 during diving, breathe steadily and avoid quick and shallow breathing,
 the demand regulator's design allows good visibility even when air bubbles
flow out from the diving regulator during exhalation. Except for the situation
when, being underwater, a diver looks at the surface and exhales at the same
time,
 whenever you take the diving regulator out of your mouth and then reinsert it,
first exhale or push the diving regulator's inflate button. Otherwise, you can
choke on water.
9. The use after diving, maintenance and storage
Once diving is finished, you must:
 take the diving regulator out of your mouth,
 remove remaining water from the diving regulator and clear it by pushing the
inflate button,
 close the shut-off valve (valves) of the cylinder/twinset,
 using the inflate button, adjust pressure in the demand regulator to the
ambient pressure,
 unscrew the pressure reducing valve from the cylinder/twinset,
 wash out the demand regulator in clean, fresh water, while clogging the
pressure reducing valve's mounting ferrule's inlet. Please ensure that all HP
and LP ports are plugged or connected properly. These steps are particularly
important after diving in salt or chlorinated water. When rinsing do not push
the constant flow button on the diving regulator. It will prevent ingress of water
to the interstage hose or the pressure reducing valve,
 when rinsing the diving regulator, check if the breathing resistance adjustment
knob is in a close position,

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 after rinsing, reconnect the demand regulator to a pressure cylinder and then
clear it, removing possible remaining water from the inside,
 in case of diving in salt or polluted water, rinsing itself is not enough to clean
thoroughly the demand regulator, therefore soaking it in warm fresh water for
at least 1 hour is recommended, if possible,
 using any aerosol spray may damage plastic elements,
 the cylinder/twinset should not be carried by holding on the pressure reducing
valve, LP and HP hoses and the diving regulator,
 leaving the cylinder/twinset unsecured may cause its fall or damage to the
shut-off valve or the pressure reducing valve.
Storage
 the demand regulator should be stored in dry, airy place, away from all
sources of heat and not in direct exposure to sunlight and chemical agents,
 the demand regulator should be protected against gasoline, oils, alcohol and
other chemicals vapours,
 the demand regulator should not be kept screwed down to the cylinder,
 the demand regulator's components should lie freely, in particular, the medium
pressure hose should be loosely laid without any bends and twists,
 both during storage and use, the regulator should be protected against
mechanical damages, and, in particular, against impacts,
 avoid crushes that deform the mouthpiece and other flexible components of
the demand regulator,
 the demand regulator's parts that are subject to ageing should be replaced
every year, irrespective of the frequency of use,
 when storing a diving regulator equipped with a breathing resistance
adjustment knob, the knob should be set in an open position which prevents
against packing damage.
Maintenance
 after diving, the demand regulator should be washed out in clean fresh water,
 silicone elements may be washed in water using mild detergent (e.g. soap),
 rinsing the silicone elements with alcohol and maintenance of the above
elements with silicone agents (silicone oils and greases) is not permitted,
 for maintenance of rubber elements use silicone grease,
 the O-ring seal should be greased/polished with silicone grease,
 the diaphragm and the outlet valve should not be greased with silicone
grease, as it may damage the parts,
 only original spare parts must be used during repairs and checks,
 demand regulators must have technical inspections carried out every year by
authorized service centre,
 after a longer period of continuous use (the demand regulator may need more
frequent service checks depending on frequency of operation and the
environment of operation), inspection and maintenance of the demand
regulator's assemblies together with the check of basic operating parameters
are recommended,

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IMPORTANT
Periodic inspections, repairs and any works that affect the work of a
demand regulator must be carried out by a manufacturer or a service centre
authorized by a manufacturer. Components and elements of a demand
regulator must not be disassembled or assembled by unauthorized
persons.
10. Warranty
In case of making claims under warranty, a proof of purchase issued by an
authorized seller and a warranty card that includes the register of annual
inspections should be always presented.
Scubatech guarantees to the original buyer that its product is free of any defects
in materials or workmanship provided that guidelines regarding the use,
maintenance or service are observed pursuant to following conditions.
The warranty is invalid in case of improper use, negligence, modification or
unauthorised product's servicing.
The scope of the warranty is limited to the product's repair or replacement,
depending on Scubatech's decision.
IMPORTANT
Under no circumstances should you try to repair the product yourself as it
could invalidate the warranty or cause loss of life or damage to health.

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WARRANTY CARD
SCUBATECH demand regulator, pressure reducing valve, diving regulator
SCUBATECH Ltd. warrants to the original owner proper operation of the demand
regulator, pressure reducing valve and the diving regulator for a period of 10 years.
This warranty card is valid under the following conditions:
 purchase should be made in an authorized SCUBATECH store,
 the person listed on a warranty card is the owner of a demand regulator,
pressure reducing valve and a diving regulator,
 servicing of a demand regulator, pressure reducing valve and a diving
regulator must be carried out at least once a year,
 servicing activities must be carried out with the use of suitable service kits by a
service centre authorized by SCUBATECH,
 the guidelines for use, operation and maintenance of a demand regulator,
pressure reducing valve and a diving regulator must be observed.
IMPORTANT
The warranty is invalidated should any repairs or adjustments are done by
persons who are not authorized to service SCUBATECH equipment and as a
result of improper use of the product and mechanical damages.
The warranty is invalidated if inspections or servicing are carried out by
unauthorised persons.
Owner's first name and surname ...............................................................................................
Address…………………………………………………………………………………………
Model …………………………………………………………………………………………
………………… ………………………………….
Purchase date Seller's stamp and signature

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CONTROL INSPECTION CARD
Inspection date Technical condition
assessment
Serviceman's
surname Signature and stamp

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11. Manufacturer information
SCUBATECH Ltd.
ul. Lubieszyńska 2
71-087 Mierzyn
Tel./fax: [phone]
e-mail: [e-mail]
12. Notes
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