Tusa Rs-350 User manual

EN250

TUSA REGULATORS

TUSA-ATEMREGLER

DÉTENDEURS TUSA

TUSA ADEMAUTOMATEN

REGULADORES TUSA

EROGATORI TUSA

OWNER’S MANUAL

BEDIENUNGSANLEITUNG

MANUEL D’UTILISATEUR

HANDLEIDING

MANUAL DEL PROPIETARIO

LIBRETTO ISTRUZIONI

BEFORE USING ANY TUSA REGULATOR, READ THIS MANUAL COMPLETELY.

VOR GEBRAUCH EINES TUSA-ATEMREGLERS DURCHLESEN.

AVANT D’UTILISER UN DETENDEUR TUSA, VEUILLEZ LIRE CE MANUEL

COMPLETEMENT.

LEES DEZE HANDLEIDING VOLLEDIG VOOR U UW TUSA-ADEMAUTOMAAT GEBRUIKT.

SĺRVASE LEER COMPLETAMENTE ESTE MANUAL ANTES DE UTILIZAR.

CUALQUIER REGULADOR TUSA.

PRIMA DI UTILIZZARE UN EROGATORE TUSA DI QUALSIASI TIPO, SI RACCOMANDA DI

LEGGERE A FONDO IL PRESENTE LIBRETTO ISTRUZIONI.

RS-340, RS-350, RS-460II, RS-520,

RS-530, RS-560, RS-670, RS-680, RS-760,

RS-790, RS-811, RS-811S, RS-812,

RS-812S, RS-860, RS1001

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Regulators

FOREWORD

CONGRATULATlONS! You are now the owner of one of the many ne TUSA prod-

ucts. Your new regulator is built to exacting standards, using only the highest quality

materials. For several years now TUSA has been developing the regulators under

the ISO9001 International Quality Assurance System.You have purchased the new-

est, the most advanced regulator for the Sport Scuba Market available today. The

TUSA regulator is the first major improvement to the conventional down stream

demand valve since 1988. The second stage is constructed of technologically ad-

vanced materials and the performance provides exceptional aspiration flow and

allows fully adjustable performance to accommodate beginner and professional div-

ers.

Before you use your new regulator, please read this manual carefully. The following

warnings, cautions, and notes were written to make it possible for you to enjoy your

diving experience with maximum safety.

We at TUSA want you to have many years of dependable service from your new

equipment and have many memorable and safe dives. Thank you for purchasing

one of our high quality products.

WARNING:

THIS PRODUCT IS A SCUBA DIVING DEVICE AND REQUIRES PROPER

TRAINING BEFORE USE.

CE Certied combinations of TUSA Regulators are listed below:

Name of

Regulator 1st Stage

Model No.

2nd Stage Safe 2nd Stage

Model No. Cover Model No. Cover

RS-340 R-300 (Yoke-DIN) S-40 BLACK SS0001 YELLOW

RS-350 R-300 (Yoke-DIN) S-50 SILVER SS-11 YELLOW

RS-460II R-400II (Yoke -DIN) S-60 BLACK SS-20 YELLOW

RS-520 R-500 (Yoke-DIN) S-20 BLACK SS-60 YELLOW

RS-530 R-500 (Yoke-DIN) S-30 BLACK

RS-560 R-500 (Yoke-DIN) S-60 GREY

RS-670 R-600 (Yoke-DIN) S-70 SILVER

RS-680 R-600 (Yoke-DIN) S-80 BLACK

RS-760 R-700 (Yoke-DIN) S-60 GREY

RS-790 R-700 (Yoke-DIN) S-90 GREY

RS-811 R-800 (Yoke-DIN) S-11 BLACK

RS-811S R-800S (Yoke-DIN) S-11 BLACK

RS-812 R-800 (Yoke-DIN) S-12 BLACK

RS-812S R-800S (Yoke-DIN) S-12 BLACK

RS-860 R-800 (Yoke-DIN) S-60 GREY

RS1001 R1000 (Yoke-DIN) S0001 BLACK

- 2 -

Regulators

RS-460II, 560, 760, 790, 811, 811S, 812, 812S, 860, 1001

Notice:

“The PPE (Personal Protective Equipment) mentioned in this User’s Manual was

submitted to tests for validation of the design and certied according to Art. 10 of

Directive 89/686/EEC by RINA - Via Corsica, 12-16128 Genova ITALY, Notied body

n 0474. This device is in compliance with EN 250:2014.

The CE marking means the compliance of the device to the Basic Health and Safety

Requirements of Annex II of Directive 89/686/EEC. The number 0474 near the CE

identies the Notied Body RINA, entitled for the EC quality control system for the

nal product according to Art. 11.A of Directive 89/686/EEC.”

RS-340, 350, 520, 530, 670, 680

Notice:

“The PPE (Personal Protective Equipment) mentioned in this User’s Manual was

submitted to tests for validation of the design and certied according to Art. 10 of

Directive 89/686/EEC by ITALCERT - Viale Sarca 336, 20126 Milano ITALY, Notied

body n 0426. This device is in compliance with EN 250:2014.

The CE marking means the compliance of the device to the Basic Health and Safety

Requirements of Annex II of Directive 89/686/EEC. The number 0426 near the CE

identies the Notied Body ITALCERT, entitled for the EC quality control system for

the nal product according to Art. 11.A of Directive 89/686/EEC.”

Notice:

The Standard EN 250: 2014 defines a SCUBA unit as an open-circuit, self-contained

underwater breathing apparatus at a minimum, must include in the least:

1. Cylinder(s) with valve(s);

2. On demand regulator(s);

3. Pressure Gauge for monitoring cylinder(s) pressure;

4. Diving Mask;

5. A transport, carrying system

The SCUBA unit may also include: Alternative air source, diving computer/gauges or other

safety devices.

WARNING:

SCUBA used simultaneously by multiple divers are limited to depths no greater than

30 meters and water temperatures less than 4°C as marked “EN250A”, when marked

“EN250A>10°C” water temperatures less than 10°C.

WARNING:

SCUBA marked “EN250A” in compliance with EN250: 2014 can be used simultaneously by

multiple divers as an escape device.

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Regulators

TABLE OF CONTENTS

SECTION Page No.

I Warning - Read Carefully .........................................................................4

II Description and Operation ........................................................................5

2.0 General ................................................................................................5

2.1 First Stage ...........................................................................................5

2.2 Second Stage ......................................................................................6

III Pre-Dive Procedures..................................................................................8

IV After Dive Procedures ...............................................................................9

V Contaminated Water Diving ......................................................................10

Vl Cold Water Diving .....................................................................................10

VlI Scheduled Maintenance ...........................................................................11

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Regulators

SECTION I

WARNING READ CAREFULLY

Unless otherwise specied TUSA regulators should be used only with open circuit

compressed air breathing equipment. Its use with oxygen-enriched air is not autho-

rized and is dangerous. The compressed air must be in compliance with the stan-

dard EN 12021.

Before any attempt is made to use this regulator underwater, you MUST have re-

ceived training and CERTIFICATION in the technique of sport diving from a recog-

nized certication agency. Use of this equipment by a person who is not certied by

a recognized agency shall render all warranties, express or implied, null and void.

Use of regulators by uncertied or untrained persons is dangerous and can result in

severe injury or death. This regulator is not intended for commercial use with surface

supplied air.

Before each use, the regulator must be given a thorough visual inspection and func-

tional test. NEVER dive with a regulator which shows signs of damage or provides

substandard performance.

Always use regulator as designated combination of rst stage and second stage. As

inappropriate combination of rst and second stages may result deterioration of per-

formance, do not connect other second stage to these (R-300, 400, 500, 600, 700,

800, 800S, 1000) rst stages or vice versa.

Repair, servicing, or addition of accessories (e.g. pressure gauge) to this regulator is

to be performed ONLY by a qualied TUSA Service Facility. The HP and LP outlets

of the rst stage have intentionally been tted with different threads to prevent the

possibility of incorrect tting of accessories.

Always apply pressure to the regulator gradually by opening the cylinder valve

SLOWLY,

NEVER lubricate any part of the regulator (especially the rubber O-ring seal between

the cylinder valve and regulator) with a hydrocarbon-based lubricant.

Notice:

Model RS-340, 350, 460, 520, 530, 560, 670, 680, 760, 790, 811, 811S, 812, 812S

860, and 1001 are intended to be used up to a 50 meter (164 feet) maximum

water depth only.

Model RS-340, 350, 520, 530, 560, 670, 680, 811, 811S, 812, 812S, and 860 are

restricted to be used above the water temperature 10°C.

Model RS-460, 760, 790, and 1001 can be used in temperatures less than 10°C.

- 5 -

Regulators

SECTION II

DESCRIPTION AND OPERATION

2.0 GENERAL

TUSA Regulators are BALANCED PISTON and BALANCED DIAPHRAGM type SIN-

GLE HOSE REGULATORS. The regulator reduces high pressure air from the scuba

cylinder to ambient pressure suitable for breathing, through the operation of rst and

second stage regulators. The rst stage regulator reduces incoming high pressure

air, to an intermediate pressure of approximately 135PSI ( 9.5bar). The second

stage regulator, using a diaphragm operated demand valve, further reduces air from

intermediate pressure to ambient pressure permitting normal breathing. The rst and

second stages of the regulator are connected by a low pressure hose. A swivel yoke

(TYPE INT) on the rst stage body secures the regulator to the cylinder valve, while

an O-ring surrounding the outlet orice on the cylinder valve ensures an airtight con-

nection to the rst stage.

2.1 FIRST STAGE

R-300 rst stage

In order to achieve natural breathing, a dynamic ow hose with a large inner diam-

eter increases the airow. The R-300 always supplies the diver with stable air at any

tank pressure or depth, delivering maximum breathing ease and comfort for them.

R-400 rst Stage

The TUSA R-400 offers a first stage with the balanced diapraghm method. This

method features minimum variation in intermediate pressure in response to changes

in residual cylinder pressure and depth. The R-400 is engineerd for cold water diving

(EN-250-2000). It also offfers two high high ow LP ports (HFP) that are close to the

diapraghm to increas the airow by aproximately 15%.

R-500 rst stage

The very popular balanced piston type rst stage offers superior reliability for stable

air supply regardless of depth or residual pressure.

R-600 and R-600 DRY rst stage

With the R-600, offers a compact design weight of just 630g during actual use.

This allows the R-670 to only be a total weight of just 1050g for the rst and sec-

- 6 -

Regulators

ond stages.The balanced diaphragm method rst stage features minimum variation

in intermediate pressure in response to changes in residual cylinder pressure and

depth. The ports are in left-right symmetry (H.P. × 2, L.P. × 4) for easier attachment

to tanks, even for beginners.

R-700 rst Stage

The R-700 is a balanced diaphragm first stage with key design and performance

characteristics:

1) Four intermediate pressure ports and two high pressure ports, 2) Balanced rst

stage, with a built-in antifreeze system, 3) Replaceable HP seat and HP poppet for

durability and servicing, 4) Two special high ow LP ports (HFP) close to the dia-

phragm offer approximately 15% greater air ow, 5) Dry balance chamber prevents

water contact with the diaphragm and the spring for superior cold water perfor-

mance. The R-700 meets the European Standards EN250:2014 requirements for

cold water conditions.

R-800, 800S rst Stage

The R-800 is a balanced piston type rst stage offering superior reliability for stable

air supply regardless of depth or residual pressure. It is equipped with four interme-

diate low pressure ports and two high pressure ports.

R1000 rst Stage

The R1000 is a balanced diaphragm rst stage with four intermediate pressure ports

and two high pressure ports. Two special high ow low pressure ports (HFP) close

to the diaphragm offer approximately 15% greater airow. The R1000 meets the Eu-

ropean Standards EN250:2014.

2.2 SECOND STAGE

Demand system

* The demand system is designed to signicantly reduce rubbing resistance of mov-

ing parts and air resistance. The result is smoother and more natural valve opening/

closing.

Light weight housing

* The second stage main unit is smaller and lighter to reduce water resistance dur-

ing diving, thus reducing the load on the face during use. The main body materials

are super-tough nylon (heat pliable polyamide resin) reinforced with glass ber for

- 7 -

Regulators

outstanding hardness and shock resistance. The materials also offer superior tensile

strength, dimensional stability, heat resistance, weather resistance and chemical re-

sistance.

Intake resistance

* The second stage includes a director to forcibly guide air from the demand valve.

That prevents free ow while signicantly lessening intake resistance. The result is

one of the lightest intake resistance values in the industry compared with products

from other companies.

New mouthpiece

The new mouthpiece, developed on the basis of ergonomic engineering, further

enhances the comfort of bite, t, and stability. Even with a light bite, a high level of

stability is achieved, so there is no fatigue from long periods of usage.

Venturi Adjustment Lever (RS-680, 790, 811, 811S, 812, 812S, 1001)

The addition of a venturi adjustment lever allows the regulator to power assist the

diver when underwater utilizing the natural venture effect. The diver can also adjust

the lever to prevent free ow such as on a surface swim.

Swivel joint (RS-340, 350, 670, 680, 812, 812S)

For optimum performance and comfort, a swivel joint is tted between the second

stage and the joint section of the low pressure hose. The swivel joint allows exibility

of the hose for eliminate hose tension at the mouthpiece for a more natural and com-

fortable bite.

S.E.A. -Sequential Exhaust Assist [PAT.P.] (RS-680)

The Sequential Exhaust Assist (S.E.A.) is an auxiliary exhaust valve, located on top

of the S-80 elliptical case to decrease primary exhaustion resistance.

Click Spring Adjustment (RS-340, 350, 680)

The click spring adjustment feature is exclusive to TUSA. It is a 5 position adjust-

ment knob designed to better control breathing resistance.

Adjustable Control Knob (RS-812, 812S)

The adjustable knob designed to better control breathing resistance.

- 8 -

Regulators

17 18

Regulators

diving, thus reducing the load on the face during use. The main body materials are

super-tough nylon (heat pliable polyamide resin) reinforced with glass fiber for out-

standing hardness and shock resistance. The materials also offer superior tensile

strength, dimensional stability, heat resistance, weather resistance and chemical resis-

tance.

Intake resistance

* The second stage includes a director to forcibly guide air from the demand valve. That

prevents free flow while significantly lessening intake resistance. The result is one of the

lightest intake resistance values in the industry compared with products from other

companies.

New mouthpiece

The new mouthpiece, developed on the basis of ergonomic engineering, further

enhances the comfort of bite, fit, and stability. Even with a light bite, a high level of sta-

bility is achieved, so there is no fatigue from long periods of usage.

Venturi Adjustment Lever (RS-680, SS-80)

The addition of a venturi adjustment lever on the S-80 allows the regulator to power

assist the diver when underwater utilizing the natural venture effect. The diver can also

adjust the lever to prevent free flow such as on a surface swim.

Swivel joint (RS-350, 340, 654, 680, 670)

For optimum performance and comfort, a swivel joint is fitted between the second stage

and the joint section of the low pressure hose. The swivel joint allows flexibility of the

hose for eliminate hose tension at the mouthpiece for a more natural and comfortable

bite.

“Air Refresher” filter (RS-350)

There are two types of high tech filter built into the second stage. An active carbon filter

cleans the air and absorbs smells, while a metal fiber filer eliminates particles as small

as 100 microns.This makes sure that the cleanest and safest air is supplied to the diver.

S.E.A. -Sequential Exhaust Assist [PAT.P.] (RS-680)

The Sequential Exhaust Assist (S.E.A.) is an auxiliary exhaust valve, located on top

of the S-80 elliptical case to decrease primal exhaustion resistance.

SECTION III

PRE-DIVE PROCEDURES

WARNING

Do not attempt to connect low pressure hoses to the high pressure ports with the use

of an adapter. Improper connection will cause damage to the equipment and could

result in serious personal injury. Low pressure components are not intended to

withstand

pressures greater than 28Bar

≒

(400 PSI). When installing your accessory

hoses, avoid damaging the O-ring. Tighten gently, but firmly into the first stage housing.

SCUBA complying with EN 250 are not intended for more than one user to breathe from

at the same time.

If SCUBA are configured and used by more than one diver at the same time, then the

cold water and breathing performances may not fulfil the requirements of EN 250.

RS-350, 340

Always connect the Octopus Regulator to the portmarked with SS. Connecting to any

other port is strictly prohibited.

PRE-DIVE OPERATING INSTRUCTIONS

1. Position the tank valve so the outlet points toward the diver.

2. Remove the dust cap from the first stage inlet and place the yoke (or DIN adaptor)

in the center of the cylinder valve connection.

3. Position the first stage body so that the second stage hose goes over the right

shoulder of the diver.

4. Hand-tighten the yoke screw or DIN adoptorscrew.

5. Check all the hose connections to the first and second stages. If they can be

loosened by hand, they should be tightened with a wrench before pressurizing.

6. Check the submersible pressure gauge to make sure it indicates zero pressure.

7. Open the tank valve slowly to gradually allow air into the regulator.

NOTE: During this operation, depress the second stage purge button to reduce

shock to the valve mechanism. Do not perform this operation in a cold environment

below 10°C (50°F). Performing this in a cold environment may cause “freeze-up” of

the regulator which can render it inoperable. If this occurs, you should contact a

TUSA authorized service center.

8. Check the submersible pressure gauge to ensure that it indicates the proper tank

pressure.

- 9 -

Regulators

9. Check the tank/regulator connection for leakage. If leakage exists, it may be cause

by incorrect mounting of the regulator on the tank valve, or by a damaged O-ring i

the tank valve.

10. To confirm that the regulator delivers air properly, first exhale through th

mouthpiece to blow any foreign matter out of the second stage, then inhale. A fe

of these breathing cycles should immediately indicate proper function.

11.If you are using the second stage as an Octopus regulator, it is strongly

recom-

mended to utilize an Octopus plug to prevent any foreign matter from entering th

second stage through the mouthpiece.

12.When the second stage is not in your mouth, uncontrolled air delivery can tak

place. This can be stopped by turning the second stage upside down and allowin

it to fill with water. Should the air delivery continue, abort the dive and have th

regulator inspected by a TUSA Authorized Service Center.

SECTION IV

AFTER DIVE PROCEDURES

Providing the best possible preventative and routine maintenance before, after, an

between dives will help to ensure the maximum life of your TUSA Regulator. To achiev

this goal, there are a number of simple, yet important, routine maintenance procedure

that should be followed by the diver after each use of the equipment. The follo

wing

procedures should be diligently followed in order to obtain the maximum life

and

serviceability from your regulator.

1. After each day of diving, the regulator must be cleaned, inspected, and prepared f

the next use, or for storage. As soon as the regulator is removed from the

air

cylinder, reinstall the dust cap over the regulator inlet port. This cap is normall

attached to the First Stage and therefore has been under water. Be sure to dry

all

the water out of this cap before securing it over the inlet port. Ensure that the O-r

ing,

if fitted, is in place inside the dust cap.

2. As soon as possible after diving, the regulator should be soaked in warm, not ov

50°C (122°F) water to remove salt and mineral deposits. The preferred method is t

attach the regulator to a charged air cylinder, open the cylinder valve, an

thoroughly soak both the first and second stage regulators . Pay particular attentio

to directing water into the mainspring cavity of the first stage regulator, the secon

stage mouthpiece, and the holes in the second stage cover. Depress the purg

button several times while the regulator is submerged in water. Dry the regulator b

pressing on the purge button with the mouthpiece pointing down.Place the dust ca

in position in the yoke, or over the DIN screw.

19 20

Regulators

SECTION V

CONTAMINATED WATER DIVING

Sophisticated diving gear designed for use in contaminated water provides constant

positive pressure inside the regulator case and utilizes redundant exhaust valve

passages. TUSA regulators are not designed to provide this requirement and therefore

are not recommended for use in contaminated water diving.

SECTION VI

RS-350/340/680/790 DRY USE IN

COLD WATER DIVING

This is important information.Be sure to read it.

WARNING:

RS-350/340/680/790DRY regulators for the European market have passed the cold water

performance test (water temperature:4°C) specified by EN250.

Soaking regulator parts in warm water will remove more salt and mineral deposits

than will conventional rinsing.It will loosen deposits on interior components that

rinsing will not (If no charged air cylinder is available, follow the above procedure but

be very careful NOT to depress the purge button, or leave dust cap off, when the

regulator is submerged in water. Failure to do this will allow water to enter both

regulator stages and may result in internal corrosion).

Simply soak the entire exterior of the first stage thoroughly, and proceed as above

when cleaning the second stage.

3. Store in a clean equipment box, or as an alternative, seal inside a plastic bag.Store

in a clean dry place.

4. Lightly lubricate the yoke screw with silicone grease.

5. Never store the regulator while it is still connected to the diving cylinder.

6. Do not use any type of solvent to clean any part of the regulator. Do not expose any

part of the regulator to silicone spray, as some aerosol propellants attack or degrade

rubber and plastic material.

7. Do not carry the diving cylinder by the regulator as such abuse will eventually

damage the regulator or the cylinder valve. Do not expose the regulator to

unnecessary shocks or impact.

- 10 -

Regulators

9. Check the tank/regulator connection for leakage. If leakage exists, it may be caused

by incorrect mounting of the regulator on the tank valve, or by a damaged O-ring in

the tank valve.

10. To confirm that the regulator delivers air properly, first exhale through the

mouthpiece to blow any foreign matter out of the second stage, then inhale. A few

of these breathing cycles should immediately indicate proper function.

11.If you are using the second stage as an Octopus regulator, it is strongly recom-

mended to utilize an Octopus plug to prevent any foreign matter from entering the

second stage through the mouthpiece.

12.When the second stage is not in your mouth, uncontrolled air delivery can take

place. This can be stopped by turning the second stage upside down and allowing

it to fill with water. Should the air delivery continue, abort the dive and have the

regulator inspected by a TUSA Authorized Service Center.

SECTION IV

AFTER DIVE PROCEDURES

Providing the best possible preventative and routine maintenance before, after, and

between dives will help to ensure the maximum life of your TUSA Regulator. To achieve

this goal, there are a number of simple, yet important, routine maintenance procedures

that should be followed by the diver after each use of the equipment. The following

procedures should be diligently followed in order to obtain the maximum life and

serviceability from your regulator.

1. After each day of diving, the regulator must be cleaned, inspected, and prepared for

the next use, or for storage. As soon as the regulator is removed from the air

cylinder, reinstall the dust cap over the regulator inlet port. This cap is normally

attached to the First Stage and therefore has been under water. Be sure to dry all

the water out of this cap before securing it over the inlet port. Ensure that the O-ring,

if fitted, is in place inside the dust cap.

2. As soon as possible after diving, the regulator should be soaked in warm, not over

50°C (122°F) water to remove salt and mineral deposits. The preferred method is to

attach the regulator to a charged air cylinder, open the cylinder valve, and

thoroughly soak both the first and second stage regulators . Pay particular attention

to directing water into the mainspring cavity of the first stage regulator, the second

stage mouthpiece, and the holes in the second stage cover. Depress the purge

button several times while the regulator is submerged in water. Dry the regulator by

pressing on the purge button with the mouthpiece pointing down.Place the dust cap

in position in the yoke, or over the DIN screw.

19 20

Regulators

SECTION V

CONTAMINATED WATER DIVING

Sophisticated diving gear designed for use in contaminated water provides constant

positive pressure inside the regulator case and utilizes redundant exhaust valve

passages. TUSA regulators are not designed to provide this requirement and therefore

are not recommended for use in contaminated water diving.

SECTION VI

RS-350/340/680/790 DRY USE IN

COLD WATER DIVING

This is important information.Be sure to read it.

WARNING:

RS-350/340/680/790DRY regulators for the European market have passed the cold w

ater

performance test (water temperature:4°C) specified by EN250.

Soaking regulator parts in warm water will remove more salt and mineral deposits

than will conventional rinsing.It will loosen deposits on interior components that

rinsing will not (If no charged air cylinder is available, follow the above procedure but

be very careful NOT to depress the purge button, or leave dust cap off, when the

regulator is submerged in water. Failure to do this will allow water to enter both

regulator stages and may result in internal corrosion).

Simply soak the entire exterior of the first stage thoroughly, and proceed as above

when cleaning the second stage.

3. Store in a clean equipment box, or as an alternative, seal inside a plastic bag.Store

in a clean dry place.

4. Lightly lubricate the yoke screw with silicone grease.

5. Never store the regulator while it is still connected to the diving cylinder.

6. Do not use any type of solvent to clean any part of the regulator. Do not expose any

part of the regulator to silicone spray, as some aerosol propellants attack or degrade

rubber and plastic material.

7. Do not carry the diving cylinder by the regulator as such abuse will eventually

damage the regulator or the cylinder valve. Do not expose the regulator to

unnecessary shocks or impact.

- 11 -

Regulators

SECTION VII

SCHEDULED MAINTENANCE

1. Do not assume that a regulator is in good working order because of storage or

infrequent use. Remember that either prolonged or improper storage can still result

in internal corrosion and/or deterioration of O-ring seals.

2. Have your regulator cleaned and adjusted frequently. The frequency will depend

upon the amount of use given the regulator and the conditions of use. However,

TUSA strongly recommends inspection, overhaul and scheduled parts replacement

at least once a year in order to ensure the optimum functioning of the regulator.

Certain parts require replacement at specific intervals. This work must be carried

out by a competent service facility. Use as rental equipment and/or in salt,

chlorinated (swimming pool), or polluted fresh water might require cleaning and

overhaul of the regulator every three to six months. Remember that chlorinated

Regulators

When using these regulators in cold water at temperatures of 10°C or below, be sure to

observe the following notices.

General Caution Items

* Before you use the regulator, be sure to receive specialized instruction on cold water

diving from a diving instruction authority so that you learn the necessary skills and

knowledge.

* Be sure to receive orientation for the diving environment.

* Be sure to obey the instructions of your instructors and guides.

Equipment Handling Caution Items

The conditions for freezing up of the regulator change in accordance with the breathing

conditions of its user (breathing volume, breathing speed, number of breaths) and the

environment conditions before and during use.

* Do not take shallow, fast breaths. It makes freezing occur more easily.

* To avoid free flow condition due to freezing NEVER push the purge button while the

regulator is outside of the water.

* Store the regulator at room temperature. When diving, store your regulator in its bag

to keep it warm until just before use.

* When waiting between dives, always keep your regulator warm. Do not leave it out in

a cold environment.

* Your regulator may freeze depending on the conditions. If your regulator freezes, it may

free flow. If it does, use breathing technique for free flow conditions.

* When diving in water temperatures of 10°C or below, always swim at a safe depth from

which you can perform an emergency swimming ascent.

SECTION VIII

“AIR REFRESHER” FILTER REPLACEMENT

(RS-350)

1. The timing for replacing the filter is the same as for the equipment overhaul. TUSA

strongly recommends that you have your filter replaced every 100 dives, or a year

after purchase or the last overhaul (or filter replacement) regardless of the condi-

tions of use.The TUSA repair facility will replace the filter during the overhaul, so be

sure to have your equipment overhauled at the specified interval. If you have

already had your equipment overhauled and only wish to replace the filter, you must

also have this work carried out at a specialist outlet or TUSA facility.

2. Never try to overhaul the equipment or replace the “Air Refresher” filter yourself, as

it could cause a serious accident.

FINAL NOTE

Service your Regulator often- your personal safety and the mechanical integrity

of your regulator depend on it.

water is an especially bad environment for regulators as the chlorine chemically

deteriorates the neoprene rubber components.

3. Regularly inspect the sintered filter in the inlet port of the first-stage. If it is

discolored or corroded, replacement by trained personnel is required. Also, at this

point, the entire regulator may need a general overhaul with replacement of all soft

seals and non-reusable components. Rust or aluminium oxide (grey powder)

deposits on the sintered filter are usually an indication that salt water has entered

the air cylinder and caused internal corrosion. At this time you air cylinder(s) should

be internally inspected by a qualified and competent service control and then

cleaned, or hydrostatically tested as required.

4. Do not disassemble your regulator. There are no adjustments which can or need

to be carried out by the user. Take the regulator to a qualified TUSA dealer or

service facility for service. Ensure that only original parts are used to service your

regulator.

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