Sherwood Magnum SRB9350 - Regulator Manual

INITIAL SET UP

This manual uses standard signal words and symbols to communicate the presence of possible hazards. The definitions of these indicators are as follows.

Indicates a potentially hazardous condition or situation which, if not avoided, could result in serious personal injury or death.

Indicates a potentially hazardous condition or situation which if not avoided may result in moderate or minor injury. It may also be used to alert against practices that may cause harm or permanent damage to equipment.
Your Sherwood regulator provides options for the attachment of accessories such as the submersible pressure gauge or dive computer, the buoyancy compensator inflator air supply and the alternate air source (octo).
Sherwood recommends that you consult your Authorized Sherwood Dealer to install these accessories for you.

BEFORE THE DIVE

It is important to inspect the regulator before starting your dive trip and again just before you enter the water. The pre-dive check should consist of at least the following steps.

1. Carefully inspect all hoses for signs of damage. This may require you to retract the hose protectors at the ends of the hoses to examine the hose condition near the end fittings. If the hose is damaged have your Authorized Sherwood Dealer replace it before you dive.
2. Visually inspect the entire regulator for signs of damage. If in doubt ask your Authorized Sherwood Dealer to assist you in performing this examination.
3. Connect the regulator to a pressurized cylinder and press the purge button several times to confirm air flow. Take a few test breaths. The effort to breathe should be minimal. If there is an unusual breathing resistance, have your regulator checked by a professional instructor or by your Authorized Sherwood Dealer before attempting to enter the water.
4. Once pressurized, do not attempt to reposition the first stage to achieve a different hose orientation. Further, do not attempt to carry the assembly by the hoses or by using the installed regulator as a handle for lifting the cylinder. This may damage components and compromise your dive.
5. The Magnum regulator provides the user with a device to control the venturi assist that is intended to decrease inhalation resistance at high flow rates. The maximum assist or least resistance is present when the switch is rotated clockwise toward the mouthpiece of the second stage. The venturi assist is reduced (breathing resistance is increased) when the switch is rotated counterclockwise toward the front of the second stage. When the venturi assist is reduced the regulator will be more stable when the second stage is unattended. When the user is breathing the switch should be in the least resistance position.

DIVING WITH THE REGULATOR

You must be aware of and observe special measures for diving in cold water at temperatures below 50°F (10°C) in order to minimize the risk of regulator freezing. Training must include emergency measures for dealing with regulator free flow. Failure to obtain the necessary training and mastery of the skills needed before diving in cold water could lead to hazardous conditions with possibility of serious personal injury or death.
Your Sherwood regulator has been designed to provide an ample air supply with minimal resistance. This should provide you with many hours of comfortable diving. However, if you feel the breathing for any reason is labored or distressing do not continue to dive. Have the regulator evaluated by your Authorized Sherwood Dealer before continuing to dive with it. The initial opening effort required to start air flow with inhalation is intentionally set low to provide you with effortless breathing. You may also unintentionally start air flow if you impact the second stage upon entry or suddenly remove the regulator from your mouth during inhalation. Sometimes this will cause the regulator to continue to flow. If this occurs, simply cover the mouthpiece opening with your thumb or replace the regulator in your mouth. The flow should stop. If it does not, then you must terminate the dive and have the regulator examined.

AFTER THE DIVE

The best time to clean your regulator is as soon as possible after concluding diving activity for the day. Delayed rinsing of the equipment increases the opportunity for corrosion or deposits to form which eventually may degrade performance of the regulator.
If possible, you should rinse the regulator while it is still pressurized. This minimizes opportunities for contaminants to reach interior passages of the regulator.
If you are not able to leave the unit pressurized for rinsing, then be certain to replace the first stage inlet protector (Dust Cap) before rinsing. During the rinsing process do not depress the second stage purge as this will open the demand valve and provide an opportunity for contaminants to enter the valve sealing area. Dry the regulator before long term storage.

STORAGE AND DEALER SERVICE

STORAGE

Once the regulator is dry, store the regulator in a container that will minimize exposure to dirt, chemicals, or ultraviolet light. Storage near electrical equipment such as motors, computers and other appliances exposes the regulator to ozone which can prematurely deteriorate certain seals and rubber parts.

DEALER SERVICE

It is strongly recommended that the regulator be inspected by an Authorized Sherwood Dealer at minimum annually or anytime you suspect that performance has decreased or damage may be present. This could reveal an issue that can be resolved before reaching a dive destination.
It is also recommended that your regulator receive a factory recommended service overhaul every other year or after 300 hours of use, whichever comes first. Your regulator may need service sooner depending on the severity of the environmental conditions or level of user care and cleaning.
With each service your Authorized Sherwood Scuba Dealer is required to register the service at www.SherwoodScuba.com. Ask your dealer to print a copy of the service registration to keep as a record of your service.
If the regulator is used for rental or training purposes, it will require complete overhaul and factory prescribed service every three to six months. Chlorinated swimming pool water is an especially damaging environment for SCUBA equipment, due to the high levels of chlorine and pH balancing chemicals that cause certain components to rapidly deteriorate.

WARNINGS AND PRECAUTIONS

PLEASE READ CAREFULLY BEFORE ATTEMPTING TO USE THIS EQUIPMENT

1. Sherwood Scuba equipment is intended for use only by persons trained and certified by a nationally recognized scuba training agency. Diving without the specific training including safe diving practices and within the limits defined by the training agency exposes the user to extremely hazardous situations that could result in serious personal injury or death. This manual is not a substitute for the instruction needed to dive in a safe manner.
2. Sherwood regulators must not be serviced by anyone untrained. To perform the correct service or repair procedures, return your equipment to an Authorized Sherwood Dealer. Any time the equipment appears to be performing incorrectly or when recommended service is needed, return your equipment to an Authorized Sherwood Dealer. Do not attempt to disassemble or modify the equipment. Equipment that is not properly serviced could lead to a malfunction during use with possible personal injury or death.
3. Nitrox use (Enriched Air Nitrox) – Requires specialized training to avoid hazards that could lead to serious injury or death. Be certain to read the information in this manual concerning Nitrox use.
4. Cold water use – Diving in water temperatures less than 50°F (10°C) can impose operational limits affecting the reliable operation of the equipment. If you plan to use your Sherwood regulator in water temperatures less than 50 F ( 10 C), you are advised to first obtain training in the diving techniques that apply to cold water diving. This training must include appropriate methods that reduce the opportunity for ice formation whenever high air flow is expected. This training must also include the appropriate emergency response for dealing with a regulator free flow associated with ice formation in the regulator interior.

ENRICHED AIR NITROX (EAN)

Use of Enriched Air Nitrox (EAN) exposes the user to additional risks that are not present when diving with standard air. Breathing EAN under pressure requires a full understanding of these risks and requires specific instruction beyond that taught in basic scuba training.
Additionally, equipment exposed to EAN must be configured and maintained properly to avoid the risk of fire associated with use of oxygen enriched gases.
Failure to understand and avoid these risks may lead to serious personal injury or death.
The Sherwood Magnum (SRB9350) regulator has been designed and manufactured for use with clean air or Nitrox mixtures containing no more than 40% oxygen.
Preparation for use with oxygen enriched gas mixtures requires the proper selection of compatible materials and clean manufacturing practices that minimize the presence of combustible materials inside the regulator. Your Sherwood regulator has been manufactured observing these requirements.
In order to maintain the necessary level of cleanliness Sherwood recommends that the regulator be dedicated to Nitrox use only.
However, if you wish to use the regulator with Nitrox and air interchangeably, you must exercise care to pass only clean air through the regulator. The level of cleanliness must be such that it contains condensed hydrocarbons of not more than 0.1 mg/ liter. If you are uncertain as to whether the air you expect to use meets this cleanliness requirement it is recommended that you avoid air use or have the regulator cleaned for EAN service before exposure to EAN.

PRODUCT REGISTRATION

Please register your regulator at www.SherwoodScuba.com.
If you have any questions contact your Authorized Sherwood Scuba Dealer for immediate attention or you may contact us at www.SherwoodScuba.com.