Larson Electronics EPL-SW Series User manual

EPL-SW Series
Explosion Proof Tumbler Switch
Class I, II, III - Copper-free Aluminum - NEMA
Instruction Manual
Thank you for your purchase of the Larson Electronics EPL-SW Series Explosion Proof switch.
WARNING
TO AVOIDTHE RISKOF FIRE,EXPLOSION OR ELECTRIC SHOCK, THIS PRODUCT SHOULD BE INSTALLED,
INSPECTEDAND MAINTAINEDBY A QUALIFIED ELECTRICIANONLY, IN ACCORDANCEWITHALL
APPLICABLEELECTRICAL CODES.
TO AVOIDELECTRIC SHOCK:
•BE CERTAIN ELECTRICAL POWER IS OFF BEFORE AND DURING INSTALLATION AND MAINTENANCE.
•PRODUCT MUST BE CONNECTED TO A WIRING SYSTEM WITH AN EQUIPMENT-GROUNDING
CONDUCTOR.
TO AVOID EXPLOSION:
•MAKE SURE THE SUPPLY VOLTAGE IS WITHIN THE VOLTAGE RATING.
•ENSURETHE MARKED TRATING IS LESS THAN THE IGNITION TEMPERATURE OF THE HAZARDOUS
ATMOSPHERE.
•DO NOT OPERATE IN AMBIENT TEMPERATURES ABOVETHOSEINDICATED ON THE PRODUCT
NAMEPLATE.
•DO NOT OPERATE IF THE LENS, CORD, SEALS, HOUSING, RECEPTACLES, ETC. IS CRACKED OR
DAMAGED. IFSO, DISCONTINUE USEAND CONTACT MANUFACTURER FOR REPLACEMENT PARTS.
•ALL FASTENERS SHOULDBE PROPERLY SEATED.
•WARNING: To avoid risk of explosion, all flat machined surfaces must be kept clean and free from scratches,
dents, debris, paint, and corrosion. The flat machined surfaces are explosion proof joints, and must be clean and
undamaged on both the enclosure and cover.
The Larson Electronics EPL-SW Explosion Proof Tumbler Switch provides a safe and secure method for operators to
interrupt power before connecting and disconnecting electrical equipment in hazardous locations. This 20-amp device is
compatible with single-phase 120-277V AC and features lever style switch(es). Available in single and double gang box
configuration.
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Mounting and Installation
Mounting of the EPL-SW is achieved via mounting tabs on the back of the
enclosure. Mount to a clean, flat surface with customer provided mounting
hardware. Hardware is not included with this switch, but is available from Larson
Electronics. Contact Larson Electronics if you wish to order.
1. The surfaces of the flat ground joint are precision machined to insure an
explosion proof joint and must be protected from scratches or damage during
installation.
2. When switch is mounted in the enclosure, it must be mounted to agree
with cover indication of operation. That is, when the cover indicates ON, the switch
must be in the ON condition.
3. Before the cover is installed, the flat ground joint surface must be
thoroughly wiped clean of any dirt, grit, or other foreign substances and a light thin
coating of lubricant placed on the joint to prevent possible corrosion.
The joint between the box and the cover has been made accurately to .0015” to
prevent the passage of this accuracy is destroyed.
4. ALL cover screws must be installed with at least five full threads engaged
and must be securely tightened. All cover openings must be closed with a suitable
cover.
5. Gaskets must not be added to these devices. Only gaskets designed for
and permanently installed in these devices may be used.
6. In accordance with the hazardous location information specifying Class
and Group listing marked on the device, sealing fittings must be added that will
comply with requirements in the latest issue of the Canadian Electrical Code or
National Electrical Code and any special requirements that are stated in the
instruction sheet with the enclosure.

EPL-SW Series
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MAINTENANCE
Before removing the cover from any such device for inspection or maintenance, the power supply circuit
must be OFF.
WARNING: To prevent risk of explosion, hammers and prying tools must not be used to remove covers
off enclosures. Damage to the explosion proof flat machined surfaces on cover and enclosure may
result. Handle covers carefully. Do not place them on surfaces that might damage or scratch the flat
machined surfaces.
Before replacing the cover, after it has once been removed, the flat ground joint surfaces must be
cleaned as described in step 3 under installation.
WARNING: To prevent risk of explosion, replace devices if the flat machined surface is damaged,
scratched, dented, or corroded. Field rework of flat machined surfaces is not possible.
CAUTION: Use 12 AWG copper conductors only. Insert the
bare wire conductor(s) under the
terminal clamp and securely
tighten the screw(s). Note: Donot exceed 35 in-lbs. of torque.
THESE INSTRUCTIONS MAY NOT COVER ALL DETAILS OR VARIATIONS OF THIS PRODUCT FOR YOUR EQUIPMENT OR INSTALLATION REQUIREMENTS.
SHOULD FURTHER INFORMATION NOT COVERED BY THESE INSTRUCTIONS BE REQUIRED, PLEASE CONTACT LARSON ELECTRONICS BY EMAIL AT
SAL[email protected] OR BY PHONE AT 1-877-348-9680 FOR FURTHER ASSISTANCE.
PLEASE VISIT LARSONELECTRONICS.COM FOR WARRANTY AND RETURN INFORMATION.