Scubatech TecLINE R2 TEC Manuale utente

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

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

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

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.

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.

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

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)

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.

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.

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.

 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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