Computronic Controls Sentinel 70 User Manual

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Sentinel 70/140 series

Automatic Battery Chargers
INSTALLATION AND OPERATION

THIS MANUAL REFERS TO THE FOLLOWING MODULES

SNS70

SNS140

SNL70
SNL140
ESNS70

ESNS140

ESNL70

ESNL140

For safe and correct use of these chargers, read and save the safety
information that precedes the installation and operation instructions.

This guide contains 6 pages (including this one). If any pages are missing,
contact the battery charger supplier or manufacturer for replacement
documentation.

Sentinel (SNS shown) Enclosed Sentinel

A division of Frank W Murphy Ltd.

41 – 46 Railway Terrace, Nechells, Birmingham, B7 5NG, United Kingdom
tel: [phone]
fax: [phone]
email: [e-mail]
web: www.computroniccontr ols.com

CCL – Sentinel 70/140 installation and operation ci0012 issue 3 6th May 2011 p1/6

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IMPORTANT SAFETY INFORMATION – READ AND SAVE THESE INSTRUCTIONS

This manual contains important safety and operating instructions for all (non UL approved) SN and ESN models.

 Do not expose the battery charger to rain, snow or wet environments.
 The use of any attachment not recommended or sold by the battery charger manufacturer may result in risk of fire,

electric shock or injury to persons.

 Do not operate charger if it has received a sharp blow, been dropped, or otherwise damaged in any way: return to

supplier.

 Do not disassemble the charger: return to supplier when service or repair is required. Incorrect re-assembly may result in

a risk of electric shock or fire.

WARNING – RISK OF EXPLOSIVE GASES

WORKING IN THE VICINITY OF A LEAD ACID BATTERY IS DANGEROUS. BATTERIES GENERATE EXPLOSIVE
GASES DURING NORMAL BATTERY OPERATION.

To reduce the risk of battery explosion, follow these instructions and those published by the battery manufacturers and the
manufacturer of any equipment you intend to use in the vicinity of the battery. Review cautionary marking on these products
and any attached equipment.

PERSONAL PRECAUTIONS.

 (i) Someone should be within range of your voice or close enough to come to your aid when you work near a lead-acid

battery.

 (ii) Have plenty of fresh water and soap nearby in case battery acid contacts skin, clothing or eyes.
 (iii) Wear complete eye protection and clothing protection. Avoid touching eyes whilst working near batteries.
 (iv) If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters eyes, immediately flood

eyes with running cold water for at least 10 minutes and get immediate medical attention.

 (v) NEVER smoke or allow a spark or flame in vicinity of battery.
 (vi) Be extra cautious to reduce risk of dropping a metal tool on to the battery. It may spark or short-circuit the battery or

other electrical part that may cause explosion.

 (vii) Remove personal metal items such as rings, bracelets, necklaces and watches when working with a lead-acid

battery. A lead–acid battery can produce a short-circuit current high enough to weld a ring or the like to metal, causing a
severe burns.

 (viii) Use the charger only for charging batteries as stated on the charger. Do not use the battery charger for charging

dry-cell batteries that are commonly used with home appliances. These batteries may burst and cause injury to persons
and damage to property.

 (ix) NEVER CHARGE A FROZEN BATTERY

PRIOR TO INSTALLATION /COMMISSIONING

 Clean battery terminals. Be careful to keep corrosion from coming into contact with eyes.
 Add distilled water in each cell until the battery acid reaches a level specified by battery manufacturer. This helps purge

excessive gas from the cell. Do not overfill. For a battery without cell caps, carefully follow manufacturer’s recharging
instructions.

 Study all battery manufacturer’s specific precautions, such as removing or not removing cell caps while charging and

recommended rates of charge.

 Determine the voltage of battery by referring to engine manual and ensure this matches the charger’s output voltage.

CHARGER LOCATION AND CONNECTION

 Never place the charger directly above battery being charged: gases from the battery will corrode and damage the

charger.

 Never allow battery acid to drip on to the charger when reading specific gravity or filling battery.
 Do not operate the charger in a closed-in area or restrict ventilation in any way.
 The battery charger should be connected to a grounded, metal, permanent wiring system; or an equipment–grounding

conductor should be run with circuit conductors not connected to equipment-grounding terminal on the battery charger.

 Connections to the battery charger should comply with all local codes and ordinances.
 SNS/SNL models – these battery chargers should be installed so that they are not likely to be contacted by people.

 ESNS/ESNL models – the AC wiring should be independent of the DC and alarm wiring. Use 2x 2.5mm (total wire

Ø=5mm²) or larger wire for DC (charger to battery) leads. Use 2.5mm² or larger for input and ground connections.

For safe and correct use of the charger, follow the following steps. Should you have any problems or the unit does not
function as expected, consult our troubleshooting guide at the end of these instructions.

 Visually inspect unit for any signs of damage, caused by transport or storage.
 Mount the charger as outlined above, paying attention to ambient temperature.
 Ensure the mains AC supply is isolated, and ensure the correct rated input voltage before connection.
 Ensure the charger is earthed at the marked earth stud.
 Check batteries in accordance with the manufacturer’s guidelines.
 Check that the charger is correct for battery type and voltage.
 Connect the charger to the batteries, observing correct polarity and ensuring a secure and tight connection.
 Switch on charger at the mains AC supply.

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