Sens EnerGenius NRG24-20 User manual

SENS EnerGenius Technical Manual
Service hotline: [phone]
1.303.678.7500 1
Installation & Operation Manual
NRG12-20: 12-Volt, 20-Amp Battery Charger
NRG24-20: 24-Volt, 20-Amp Battery Charger
NRG22-20: 12/24-Volt, 20-Amp Battery Charger
SENS Part Number:
Document Revision:
DCN Number:
Date:
101298
V
107672
June 25, 2019
Installation or service questions?
Call SENS at 1.800.742.2326 (303.678.7500)
between 8 a.m. and 5 p.m. (Mountain Time)
Monday through Friday, or visit our website.
Copyright © Stored Energy Systems LLC 2007
1840 Industrial Circle
Longmont, CO 80501
Phone: [phone]
800.742.2326
Fax: [phone]
Email: [e-mail]
Web: www.sens-usa.com
™
®

SENS EnerGenius Technical Manual
2
Service hotline: [phone]
1.303.678.7500
IMPORTANT SAFETY INSTRUCTIONS FOR INSTALLER AND OPERATOR
1. SAVE THESE INSTRUCTIONS.
2. DO NOT EXPOSE CHARGER TO RAIN OR SNOW.
3. Use of an attachment not recommended or sold by SENS may result in a risk of fire, electric shock,
or injury to persons.
4. ONLY TRAINED AND QUALIFIED PERSONNEL MAY INSTALL AND SERVICE THIS
UNIT.
5. Do not operate charger if it has received a sharp blow, been dropped, or otherwise damaged in any way; shut
off power at the branch circuit protectors and have the unit serviced or replaced by qualified personnel.
6. To reduce risk of electric shock, disconnect the branch circuit feeding the charger before attempting any
maintenance or cleaning. Turning off controls will not reduce this risk.
WARNING:
RISK OF EXPLOSIVE
GASES.
A. WORKING IN THE VICINITY OF A LEAD-ACID OR NICKEL-CADMIUM BATTERY IS
DANGEROUS. STORAGE BATTERIES GENERATE EXPLOSIVE GASES DURING NORMAL
BATTERY OPERATION. FOR THIS REASON, IT IS OF UTMOST IMPORTANCE THAT EACH
TIME BEFORE USING YOUR CHARGER, YOU READ THIS MANUAL AND FOLLOW THE
INSTRUCTIONS EXACTLY.
B. To reduce the risk battery explosion, follow these instructions and those published by the battery
manufacturer and the manufacturer of any equipment you intend to use in the vicinity of a battery. Review
cautionary markings on these products and on the engine.
A. Someone should be within range of your voice or close enough to come to your aid when you work near a
storage battery.
B. Have plenty of fresh water and soap nearby in case battery electrolyte contacts skin, clothing, or eyes.
C. Wear complete eye protection and clothing protection. Avoid touching eyes while working near a storage
battery.
D. If battery electrolyte contacts skin or clothing, wash immediately with soap and water. If electrolyte enters
eye, immediately flood the eye with running cold water for at least 10 minutes and get medical attention
immediately.
E. NEVER smoke or allow a spark or flame in vicinity of battery or engine.
F. Be extra cautious to reduce risk of dropping a metal tool onto battery. It might spark or short circuit battery
or other electrical part that may cause explosion. Using insulated tools reduces this risk, but will not
eliminate it.
G. Remove personal metal items such as rings, bracelets, necklaces, and watches when working with a storage
battery. A storage battery can produce a short circuit current high enough to weld a ring or the like to metal,
causing a severe burn.
H. Use this charger for charging LEAD-ACID or LIQUID ELECTROLYTE NICKEL-CADMIUM
batteries only. Do not use this battery charger for charging dry cells, alkaline, lithium, nickel-metal-
hydride, or sealed nickel-cadmium batteries that are commonly used with home appliances. These batteries
may burst and cause injuries to persons and damage to property.
I. NEVER charge a frozen battery.
7. PERSONAL PRECAUTIONS

SENS EnerGenius Technical Manual
Service hotline: [phone] . 2 3 2 6
1.303.678.7500 3
This manual contains important safety, installation and operating instructions for SENS battery charger model
NRG12-20 (configured for 12V,20A only), NRG24-20 (configured for 24V, 20A only) and NRG22-20 (field
configurable for 12V or 24V, 20A).
INSTALLATION INSTRUCTIONS
WARNING:
ONLY TRAINED AND QUALIFIED PERSONNEL
MAY INSTALL AND SERVICE THIS UNIT.
MODEL NUMBER CONFIGURATION
Mount to vertical surface of 3/4” (19 mm) plywood or other
material of equal strength and durability, using four 1/4” (6
mm) diameter mounting screws. For mounting in a high
vibration environment, use of six fasteners is recommended.
6” (150 mm) minimum
ventilation clearance
top and bottom
2” (50 mm) minimum
ventilation clearance
on both sides
Model Number Breakout
NRG 22-20- C L S
Model Output Output Input Voltage Option Code
Voltage Current Frequency (may not be present)
12: 12 volts 20: 20 Amps H: 120/208-240V, E: OSHPD labeled***
24: 24 volts 50/60 Hz**
22: 12/24 volts R: 120/208-240V,
60 Hz*
NOTE: Not all configurations are available on all models.
Contact the factory for confirmation.
*UL listed, CSA certified
**UL listed, CSA certified and CE marked
***California Special Seismic Certification Pre-Approval

SENS EnerGenius Technical Manual
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Service hotline: [phone] . 2 3 2 6
1.303.678.7500
1. PREPARING FOR USE:
A. INSTALLATION OF THE UNIT MUST COMPLY WITH LOCAL ELECTRICAL CODES
AND OTHER APPLICABLE INSTALLATION CODES.
B. INSTALLATION MUST BE MADE ACCORDING TO THE INSTALLATION
INSTRUCTIONS AND ALL APPLICABLE SAFETY REGULATIONS.
WARNING:
ONLY TRAINED AND QUALIFIED
PERSONNEL MAY INSTALL AND
SERVICE THIS UNIT.
W = 13.95”
H = 13.06”
D = 6.83”

SENS EnerGenius Technical Manual
Service hotline: [phone] . 2 3 2 6
1.303.678.7500 5
C. This unit is permanently connected to the AC circuit and to the battery. An external disconnect device with a minimum of
0.12”(3 mm) pole separation must be located in the AC input to the charger.
• Do not energize the AC supply circuit until ALL wiring is connected, internal controls are properly set, and the cover is
secured. Always shut the AC supply circuit off before installing or removing any wiring or opening the cover for any
reason.
• Always observe proper polarity of the DC output leads.
• Always connect the output leads in this order: ungrounded charger output first, then ungrounded battery terminal, then
grounded charger output, and grounded battery terminal last. If the battery must be disconnected for service, remove the
output wiring in the reverse of the order given above.
D. Be sure battery terminals are clean and properly tightened. Be careful to keep corrosion from coming in contact with eyes.
E. Add distilled water to each cell until the electrolyte reaches the level specified by the battery manufacturer. This helps
purge excess gas from the cells. Do not over fill. For a battery without cell caps, carefully follow the manufacturer’s
recharging instructions.
F. Study all battery manufacturer’s specific precautions such as removing or not removing cell caps while charging and
recommended rates of charge.
• The recommended charge current range must include the rated output current of this charger, which is 20 amperes.
• Set the float voltage jumper to the battery manufacturer’s recommended float charge voltage. Incorrect charge voltage
will accelerate generation of explosive gases, increasing the risk of fire or explosion.
G. Enable the automatic boost charge mode (equalizing charge) only if recommended by the battery manufacturer
H. Determine the voltage of the battery by referring to the engine or battery owner’s manual and make sure that the 12V/24V
select jumper is set to the correct voltage.
Use wire routing devices to hold
alarm and temperature sensor
conductors at least 1/4” (6.3 mm)
away from power conductors
Grounding
Conductor
Use conductors rated 90°C/194°F or higher.
Input conductors must be suitable for 15A circuits.
Battery conductors must be suitable for 40A circuits. See Section 5.
Alarm and temperature sensor may use low power conductors.
Neutral
115/230VAC
Temperature sensor
Alarm contacts
+Battery
-Battery