Vanner IT12-1400 User manual

Owners Manual
IT SERIES Industrial True Sine Wave Inverter Owners Manual
1
IT SERIES
Industrial True Sine Wave
AC Power Inverter
Models
IT12-1400 IT12-2000 IT12-2600 IT12-3200
IT12-1600 IT12-2200S IT12-2800 IT12-3600PL
IT12-1800 IT12-2400 IT12-3000 IT24-3500
Owners Manual D98494 June 18, 2001

IT SERIES Owner's Manual
IT SERIES Industrial True Sine Wave Inverter Owners Manual
2
Typical Installation
OEM Wire
OEM Wire
OEM Wire
Common OEM
Ground at Starter
or Engine Block
12 Volt IT Series
DC to AC Inverter
Circuit
Breaker
Panel
Box
Charging Fuse
250 Amp Minimun
Charging Fuse
250 Amp Minimum
Inverter Fuse
See Figure 10 for
Fuse and Wire Size
Accessory
Polarized Quick
Connectors
1/0 Wire Minimum
1/0 Wire Minimum
Field AC Wiring
OEM
Battery
Inverter
Batteries
Inverter
Batteries
OEM
Alternator
AC-2
AC-1

Table of Contents
IT SERIES Industrial True Sine Wave Inverter Owners Manual
3
TABLE OF CONTENTS
1 INTRODUCTION
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5
2SPECIFICATIONS AND FEATURES
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6
SPECIFICATIONS
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6
STANDARD FEATURES
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8
PARTS AND ACCESSORIES
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9
3 SAFETY INSTRUCTIONS
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10
README
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10
GENERAL PRECAUTIONS
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10
EXPLOSIVE GAS PRECAUTIONS
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11
BATTERY PRECAUTIONS
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11
4 COMPONENT IDENTIFICATION AND DESCRIPTION OF OPERATION
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12
(4) AUTO THROTTLE INDICATOR LIGHT (VOLT GUARD FEATURE)
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13
(5) LOW BATTERY WARNING INDICATOR LIGHT (LOW DC WARNING)
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13
(6) OVERLOAD INDICATOR LIGHT
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13
(7) OVER TEMPERATURE INDICATOR LIGHT
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13
(8) LOW BATTERY SHUT DOWN INDICATOR LIGHT (LOW DC)
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13
(9) ON/OFF SWITCH (AND RESET SWITCH)
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13
(10) INVERTER INDICATOR LIGHT
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14
(13) POSITIVE DC INPUT CONTACT
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14
(14) NEGATIVE DC INPUT CONTACT
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14
(16) CB-2 15 AMP AC OUTPUT CIRCUIT BREAKER
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15
(17) CB-1 20 OR 30 AMP AC OUTPUT CIRCUIT BREAKER
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................................
.
15
(18) CHASSIS GROUND BONDING LUG
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15
(20) AC OUTPUT TERMINAL BLOCK CONTAINING OUTPUTS AC-1 AND AC-2
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15
(32) REMOTE CONTROL TERMINAL BLOCK
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16
(32.1) Remote ON/OFF Switch Terminals 1, 2 and 3
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17
(32.2) Remote Inverter Indicator Light (LED) Terminals 4 and 5
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17
(32.3) Auto Throttle Control (Volt Guard) Terminal 6
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...
18
(32.5) Remote Low Battery Warning Terminal 8
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19
(33) GFCI DUPLEX RECEPTACLE
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19
(35) COOLING FAN (NOT SHOWN)
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19
5 INSTALLATION AND START-UP
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20
UNPACKING THE INVERTER
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20
INVERTER INSTALLATION CONSIDERATIONS
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20
DC WIRING CONSIDERATIONS
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20
DC WIRING INSTALLATION PROCEDURE
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21
REMOTE CONTROL WIRING INSTALLATION
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23
AC OUTPUT WIRING INSTALLATION PROCEDURE
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23
START-UP AND TEST PROCEDURE
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23

Table of Contents
IT SERIES Industrial True Sine Wave Inverter Owners Manual
4
6 PREVENTIVE MAINTENANCE AND TROUBLE SHOOTING PROCEDURES
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24
PREVENTIVE MAINTENANCE
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24
TROUBLE SHOOTING PROCEDURES
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24
7 APPENDIX
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26
WARRANTY
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26
GFCI TEST RECORD
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27
List of Figures and Tables
FIGURE 1 SPECIFICATIONS FOR MODELS RATED UP THROUGH 2400 WATTS.
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6
FIGURE 2 SPECIFICATIONS FOR MODELS RATED 2600 WATTS AND HIGHER
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..................
7
FIGURE 3 INVERTER TOP VIEW
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12
FIGURE 4 INVERTER FRONT, RIGHT SIDE AND BOTTOM VIEW
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..
14
FIGURE 5 INVERTER FRONT AND LEFT SIDE VIEW
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15
FIGURE 6 REMOTE CONTROL TERMINAL BLOCK
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16
FIGURE 7 REMOTE CONTROL SWITCH WIRING VARIATIONS
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17
FIGURE 8 AUTO THROTTLE CONTROL DIAGRAM (VOLT GUARD FEATURE)
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18
FIGURE 9 REMOTE LOW BATTERY WARNING
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19
FIGURE 10 DC CABLE AND FUSE SIZING CHART
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21
FIGURE 11 UL LISTED RING TERMINALS FOR DC CABLES
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22
FIGURE 12 GFCI TEST RECORD
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27

Introduction
IT SERIES Industrial True Sine Wave Inverter Owners Manual
5
1INTRODUCTION
Thank you for purchasing a Vanner IT SERIES Inverter. We are confident that you will be satisfied with its
performance and its many features. With proper installation and care, you can look forward to years of
service from this high performance product.
“IT” stands for Industrial True Sine Wave.
The IT SERIES is a family of dependable inverters designed to meet the severe service requirements of
the industrial market. All models of the IT SERIES produce true sine wave AC output power.
This document will describe the operation, technical specifications and installation procedures of the
various models and accessories offered in this product family. We suggest that you familiarize yourself
with the model numbers of the inverter and optional accessories you have purchased before proceeding
with this manual. If you require additional information please contact your dealer, or contact us directly at
1-800-227-6937 (800 AC POWER).
WARNING: Before you install and use your IT SERIES Inverter be sure to read and save these
safety instructions.
Model Listing
The IT SERIES product line is designed to meet the requirements of a variety of applications. In order to
meet these requirements we offer 12 volt models in 200 watt increments.
NOTICE: All models of the IT SERIES use the same front panel and therefore look identical. To
identify the model number of your particular unit it is necessary to refer to the
Specification Label located on the right side of the unit or to the Identification Label
located on the front.
Please note your model and serial number here for future reference.
Model No.________________ Serial No.________________ Date of Installation ______________

Specifications and Features
IT SERIES Industrial True Sine Wave Inverter Owners Manual
6
2Specifications and Features
Specifications
Figure 1Specifications for models rated up through 2400 watts.
Model Number
SPECIFICATIONS IT12-1400 IT12-1600 IT12-1800 IT12-2000 IT12-2200S IT12-2400
AC Power Output
Rated Output Watts * 1400W 1600W 1800W 2000W 2200W 2400W
Continuous Output 11.7A
1400W 13.3A 1600W 15.0A 1800W 16.7A 2000W 18.3A 2200W 20.0 A 2400W
Surge Output at 3 seconds 22.9A 23.8A 24.7A 25.6A 41.1A 41.6A
Output Waveform True Sine Wave
Total Harmonic Distortion Less than 4% THD for all loads up to surge output
Output Voltage 120 Volts ± 5%
Output Frequency 60 Hz ± 0.025 Hz (0.04%)
DC Input Voltage Range IT12-XXXX = 10.5 - 16.6 VDC / IT24-3500 = 21.0 TO 33.2 VDC
DC Input Current
Inverter OFF 1 ma
Inverter ON in Load Demand
Mode (No AC load) IT12-XXXX =0.5 amps / IT24-3500 = .255 amps
Full load at 12VDC 160A 185A 210A 225A 235A 260A
AC Output Wiring Method
One Built-in Receptacle GFCI Duplex Receptacle protected by a 15 amp circuit breaker
Output AC-1: protected by a 20 amp circuit breaker on models up through
2400 watts, 30 amp circuit breaker on models 2600 watts and higher
Two Hardwire Output Circuits Output AC-2 protected by the 15 amp GFCI feedthrough on all units
System
Ambient Operating
Temperature -40 to +105ºF (-40 to +40ºC)
Cooling Air Thermostatically controlled intake fan
Enclosure White painted aluminum
Dimensions - All Models 8.0"H x 13.75"W x 15.75"D
Unit Weight 45 Ibs 46 Ibs 47 lbs 48 lbs 57 lbs 70 lbs
*Note: The inverter will try to power any load, even a short circuit, for 3 seconds. When the load exceeds the
inverter's rated output the Overload Indicator Light will turn ON. After 3 seconds, the inverter will reduce the
AC Output Voltage as needed to limit the AC Output Current. If the inverter reduces output voltage below
108 volts for 10 seconds, the inverter will shut itself OFF for Overload.

Specifications and Features
IT SERIES Industrial True Sine Wave Inverter Owners Manual
7
Figure 2Specifications for models rated 2600 watts and higher
Model Number
SPECIFICATIONS
IT12-2600
IT12-2800 IT12-3000 IT12-3200
IT12-3600PL
IT24-3500
AC Power Output
Rated Output Watts * 2600W 2800W 3000W 3200W 3600W for 30 minutes
minimum**
3500W
Continuous Output 21.7A
2600W 23.3A 2800W 25.0A 3000W 26.7A 3200W 30.0A 3600W 29.2 A 3500W
Surge Output at 3 seconds 42.1A 42.6A 43.2A 43.7A 43.7A 83.0A
Output Waveform True Sine Wave
Total Harmonic Distortion Less than 4% THD for all loads up to surge output
Output Voltage 120 Volts ± 5%
Output Frequency 60 Hz ± 0.025 Hz (0.04%)
DC Input Voltage Range IT12-XX.XX = 10.5 - 16.6 VDC / IT24-3500 = 21.0 TO 33.2 VDC
DC Input Current
Inverter OFF 1 ma
Inverter ON in Load Demand
Mode (No AC load) IT12-XXXX =0.5 amps / IT24-3500 = .255 amps
Full load at 12VDC 285A 315A 340A 365A 365A 170A
AC Output Wiring Method
One Built-in Receptacle GFCI Duplex Receptacle protected by a 15 amp circuit breaker
Output AC-1: protected by a 20 amp circuit breaker on models up through
2400 watts, 30 amp circuit breaker on models 2600 watts and higher
Two Hardwire Output Circuits
Output AC-2 protected by the 15 amp GFCI feedthrough on all units
System
Ambient Operating
Temperature -40 to +105ºF (-40 to +40ºC)
Cooling Air Thermostatically controlled intake fan
Enclosure White painted aluminum
Dimensions - All Models 8.0"H x 13.75"W x 15.75"D
Unit Weight 71 Ibs 72 Ibs 73 lbs 75 lbs 75lbs 75 lbs
*Note: The inverter will try to power any load, even a short circuit, for 3 seconds. When the load exceeds the
inverter's rated output the Overload Indicator Light will turn ON. After 3 seconds, the inverter will reduce
the AC Output Voltage as needed to limit the AC Output Current. If the inverter reduces output voltage
below 108 volts for 10 seconds, the inverter will shut itself OFF for Overload.
** At 77ºF(25ºC) the IT12-3600 can produce 3600 watts for at least 30 minutes before overheating.

Specifications and Features
IT SERIES Industrial True Sine Wave Inverter Owners Manual
8
Standard Features
1. True sine wave 120 volt AC output.
2. Total harmonic distortion less than 4% for all loads up to the Surge Output Rating.
3. Resilient electronic protection designed to handle output short circuits and output overloads.
4. Built-in Volt Guard Battery Voltage Monitor, providing ground control for an automatic throttle to
insure maximum alternator output when needed.
5. Load Demand Feature to conserve DC power under no load conditions.
6. 15 amp GFCI Duplex Receptacle.
7. Two AC output circuits (one GFCI protected) with individual circuit breakers.
8. Terminal block for hardwiring the AC outputs.
9. Automatic shutoff for low or high battery voltage, overload or over temperature.
10. Remote control circuit capable of single wire input (12 or 24 volt input) or 2 wire (12 volt signal
and return).
11. Remote indicator light (LED) circuit to operate a remote inverter ON/OFF status LED.
12. Remote Low Battery Warning Circuit, providing ground control for a remote warning device when
battery voltage falls to 11.0 (22.0) Volts DC.
13. Terminal block for wiring remote control, remote Inverter ON/OFF LED, remote Low DC Warning
device and Auto Throttle control circuits.
14. Indicator lights for Auto Throttle Signal, Low Battery Warning, Low Battery Shutoff, Over
Temperature Shutoff, Overload and Inverter ON/OFF/Load Demand status.
15. All controls and wiring connections accessible from the front of the inverter.
16. Thermostatically controlled cooling intake fan.
17. Factory selectable Load Demand ON/OFF. (ON is standard.)
18. Factory selectable Five Minute Automatic Restart after shutdown due to fault. (OFF is standard.)
Definitions
Load Demand Feature and Load Demand Mode:
The Load Demand Feature is an energy conserving feature which allows the inverter to enter the ‘Load
Demand Mode’ whenever the inverter is ON and the AC load has been less than 10 watts for
approximately 10 seconds. While in the ‘Load Demand Mode’ the inverter does not produce 120 volts AC
but instead produces pulses of voltage which the inverter uses to look for a load. When a load greater
than 10 watts is sensed, the inverter will turn fully ON to produce 120 Volts AC. The ‘Load Demand Mode’
is often also described as ‘stand-by mode’ or ‘sleep mode’. While in the ‘Load Demand Mode’ 12-volt
models consume approximately 0.5 amps of DC and 24-volt models consume approximately 0.25 amps
of DC.

Specifications and Features
IT SERIES Industrial True Sine Wave Inverter Owners Manual
9
Parts and Accessories
Part
Number
Name
Description
03644 Bussmann Fuse ANL-250 250 amp DC fuse for charging cable
04521 Bussmann Fuse ANN-300 300 amp DC input fuse for IT12-1400 thru IT12-2000
04523 Bussmann Fuse ANN-400 400 amp DC input fuse for IT12-2200S
03646 Bussmann Fuse ANL-500 500 amp DC input fuse for IT12-2400 and larger
03637 Bussmann Fuse Holder 4164 Fuse holder for the above DC input fuses
D07923-00 Quick Connect DC Input Cable 18” long 4/0 DC Input Cable with 3/8” ring terminals
and polarized 350 amp Quick Connector.
D07923-01 1/0 Quick Connect Cable Set For use with customer supplied 1/0 DC input cable for
IT12-1400 thru IT12-2000. Includes D07923-00 and
mating quick connector for 1/0 cable.
D07923-02 2/0 Quick Connect Cable Set For use with customer supplied 2/0 DC input cable for
IT12-1400 thru IT12-2000. Includes D07923-00 and
mating quick connector for 2/0 cable.
D07923-03 3/0 Quick Connect Cable Set For use with customer supplied 3/0 DC input cable for
IT12-1400 thru IT12-2200S. Includes D07923-00 and
mating quick connector for 3/0 cable.
D07923-04 4/0 Quick Connect Cable Set For use with customer supplied 4/0 DC input cable for
all IT models. Includes D07923-00 and mating quick
connector for 4/0 cable.
D08403 DC Input Compressing Fitting Kit Includes 2) D08241 Compression Fittings and
Installation Diagram D98403. Accepts DC input
cables up to 250MCM.
D08506 Remote Switch Assembly SPST Toggle Switch, 25 foot long cable, 1amp fuse
and fuse holder.
73-46 Automatic Throttle Vanner Automatic Throttle for mechanical throttle
linkages. (The 73-46 does not apply to electronic
engines having no mechanical linkage to the
accelerator pedal.)
05235 12 volt 30 amp Bosch Relay Automotive 12 volt SPDT relay with 30 amp contacts.
D08546 20 Amp AC Output Cord Set NEMA L5-20R receptacle (120 volt, 20 amp, twist-
lock) on 1’ long 12/3 SO cable with ring terminals and
includes a mating NEMA L5-20P plug.
D07924 30 Amp AC Output Cord NEMA L5-30R receptacle (120 volt, 30 amp, twist-
lock) receptacle on 1' long 10/3 SO cable with ring
terminals.

Safety Precautions
IT SERIES Industrial True Sine Wave Inverter Owners Manual
10
3SAFETY INSTRUCTIONS
README
WARNING: Before you install and use your IT SERIES AC Power Inverter, be
sure to read and save these safety instructions.
This manual contains important safety and operating instructions for the Vanner Power Group IT SERIES
Power Inverter as prescribed by Underwriters Laboratories (UL). The IT SERIES inverter is listed as
compliant with UL 458, Power Converters/Inverters and Power Converter/Inverter Systems, and UL 1741
Power Conditioning Units for use in Residential Photo-voltaic Power Systems. The IT SERIES is also
listed in the Canadian National Standard CSA – C22.2 No. 107.1957.
NOTICE: The output waveform of the IT SERIES inverter is sinusoidal. Total harmonic distortion is
less than four percent.
CAUTION: Read owners manual BEFORE wiring or powering up.
CAUTION: Not intended for DC input directly from a solar array. Batteries must be used.
CAUTION: DO NOT cover or obstruct ventilation openings. DO NOT mount in a zero-clearance
compartment. Overheating may result.
WARNING: Under high ambient temperature / high-power-output conditions some parts of the
inverter may become hot enough to cause burns. The unit should be installed so that it is
not to be contacted by personnel.
WARNING: This equipment employs components that tend to produce arcs and sparks. To prevent
fire or explosion, DO NOT install in confined areas or compartments that contain batteries
or flammable materials.
WARNING: Improper use of this product may result in risk of electrical shock. Both AC and DC
voltage sources are terminated inside this equipment.
Use only the ground fault circuit interrupter (GFCI) receptacle(s) or circuit breaker(s)
specified in the installation and operating instructions. Other types may fail to operate
properly when connected to this equipment.
DANGER: Battery connections are for disconnect only, NOT for current interruption.
General Precautions
1. Do not expose the inverter to direct water spray or snow.
2. To reduce the risk of a fire hazard, do not cover or obstruct the ventilation openings.
3. Do not install the inverter in a zero clearance compartment. This may result in overheating or
diminished performance.
4. To avoid the risk of fire, electrical shock, or injury to persons, do not use attachments not
recommended or sold by the Vanner Power Group.
5. Vanner recommends that all AC and DC electrical wiring be performed by a licensed electrician or a
qualified technician to ensure compliance with all applicable national and local wiring regulations.
6. To avoid a risk of fire and/or electrical shock, always verify wiring connections are in good electrical
condition. All external conductors must use proper wire size to avoid dangerous overheating or
diminished performance.
7. If the inverter has been dropped or damaged in any way, do not operate the inverter until it has been
verified to be safe by a qualified technician.

Safety Precautions
IT SERIES Industrial True Sine Wave Inverter Owners Manual
11
8. To reduce the risk of electrical shock, always disconnect the AC and DC connections to the inverter
before attempting any maintenance. Simply turning the inverter off does not prevent electrical shock.
9. The inverter must be properly grounded in accordance with local and national codes and ordinances
before operation. For most installations, the negative (ground) conductor should be bonded to the
grounding system at one and only one point in the system.
10. For optimum inverter performance, battery temperature should be above 32 degrees Fahrenheit.
11. Do not disassemble the inverter. See the service section of this manual for instructions on obtaining
service. Attempting to service the inverter yourself may result in a risk of electrical shock, fire and/or
loss of warranty.
Explosive Gas Precautions
1. This equipment contains components, which tend to produce arcs or sparks. To prevent fire or
explosion, do not install in compartments containing batteries or flammable materials, or in locations
that require ignition protected equipment. This includes any space containing gasoline-powered
machinery, fuel tanks, or joints, fittings, or other connections between components of the fuel system.
2. To reduce the risk of battery explosion, follow these instructions, the battery manufacturer
instructions, and the instructions of the manufacturer of the equipment in which the battery is
installed. Working near a lead-acid battery is dangerous. Batteries generate explosive gases during
normal battery operation.
Battery Precautions
1. Always have someone within range of your voice to come to your aid when you work near a lead-acid
battery.
2. Have close access to plenty of fresh water and soap in case battery acid contacts skin, clothing, or
eyes.
3. Always wear complete eye protection and clothing protection. Avoid touching eyes while working near
batteries.
4. If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters eye,
immediately flood eye with running cold water for at least 20 minutes. Get medical attention
immediately.
5. NEVER smoke or allow a spark or flame near a battery. Gases produced by batteries are explosive.
6. Be careful when working with metal tools around batteries. Potentials exist for sparks or short-circuit
of the battery or other electrical part which could cause an explosion.

Component Identification and
Description of Operation
IT SERIES Industrial True Sine Wave Inverter Owners Manual
12
4COMPONENT IDENTIFICATION and DESCRIPTION of OPERATION
Figure 3Inverter Top View
(1) Top entry for positive DC input cable
(2) Top entry for negative DC input cable
(3) Top entry for Remote Control Terminal Block

Component Identification and
Description of Operation
IT SERIES Industrial True Sine Wave Inverter Owners Manual
13
(4) Auto Throttle Indicator Light (Volt Guard Feature)
(see also item (32.3) Terminal 6 Auto Throttle Control Terminal)
Light Display
Description
Green Light is ON The Auto Throttle Signal (ground signal) is ON due to battery voltage
remaining below 12.6 (25.2) volts for 15 seconds. The Indicator Light and
the Auto Throttle Signal will remain ON until battery voltage remains above
13.8 (27.0) volts for 15 seconds. The indicator light will also remain ON at
full load output.
The Volt Guard Feature is designed to control an automatic throttle on vehicles where the inverter
is required to operate continuous, heavy AC loads. By controlling the auto throttle the Volt Guard
Feature will insure that the vehicle’s alternator operates at maximum output when needed.
The Volt Guard circuit is designed to provide ‘ground control’ for a Bosch relay, Vanner part number
05235 or equal. Use the Bosch relay to operate the automatic throttle, Vanner 73-46 Automatic
Throttle or equal. See Figure 5 for details and Figure 7 for a schematic diagram.
(5) Low Battery Warning Indicator Light (Low DC Warning)
Light Display
Description
Yellow Light is ON The inverter is ON and battery voltage has decreased to less than 11 (22)
volts DC. Automatic inverter shutdown for low battery at 10.5 (21) volts is
imminent unless the battery voltage is increased.
(6) Overload Indicator Light
Light Display
Description
Solid Red The inverter is ON but the inverter’s AC output circuitry is sensing an
overload condition. If the AC load is not reduced, the inverter will shut itself
OFF after approximately 12 seconds.
Blinking Red The inverter has shut itself OFF due to overload. The Inverter ON/OFF
Switch must be cycled to reset and restart the inverter.
(7) Over Temperature Indicator Light
Light Display
Description
Blinking Red The inverter has shut itself OFF due to over temperature. The Inverter
ON/OFF Switch must be cycled to reset and restart the inverter.
(8) Low Battery Shut Down Indicator Light (Low DC)
Light Display
Description
Blinking Red Battery voltage has fallen below 10.5 volts (21 volts) and the inverter has
shut itself OFF. The Inverter ON/OFF Switch must be cycled to reset and
restart the inverter.
(9) ON/OFF Switch (and RESET Switch)
The ON/OFF Switch is a two-position rocker switch used to turn the inverter ON/OFF and is used
as a RESET Switch. When the inverter has automatically shut itself OFF due to a fault, the inverter
must be RESET by turning the ON/OFF Switch OFF or by turning a remote switch OFF. (If an
automatic shutdown has occurred due to a fault, one of the fault indicator lights will be displayed
until the inverter is RESET.

Component Identification and
Description of Operation
IT SERIES Industrial True Sine Wave Inverter Owners Manual
14
(10) Inverter Indicator Light
Light Display
Description
Green Light is OFF Inverter is OFF
Solid Green Inverter is ON and is producing AC power
Blinking Green Inverter is in Load Demand Mode
Figure 4Inverter Front, Right Side and Bottom View
(11) Bottom entry for positive DC input cable
(12) Bottom entry for negative DC input cable
(13) Positive DC Input Contact
(14) Negative DC Input Contact
(15) Bottom entry for Remote Control Terminal Block

Component Identification and
Description of Operation
IT SERIES Industrial True Sine Wave Inverter Owners Manual
15
(16) CB-2 15 Amp AC Output Circuit Breaker
CIRCUIT BREAKER CB-2 (bottom breaker) protects the GFCI Receptacle and AC Output AC-2.
(17) CB-1 20 or 30 Amp AC Output Circuit Breaker
CIRCUIT BREAKER CB-1 (top breaker) protects AC Output AC-1. CB-1 is a 20 amp breaker on
models up through 2400 watts. CB-1 is a 30 amp breaker on models rated 2600 watts and higher.
(18) Chassis Ground Bonding Lug
(19) Bottom entry for AC output cable
(20) AC Output Terminal Block containing outputs AC-1 and AC-2
(21) Side entry for AC output cable
(22) N/A
(23) N/A
(24) Factory set-up jack
(25) Air Exhaust Vents
Figure 5Inverter Front and Left Side View

Component Identification and
Description of Operation
IT SERIES Industrial True Sine Wave Inverter Owners Manual
16
9-POSITION
TERMINAL BLOCK
+5V
GND
No
connection
No
connection
INTERNAL
FUNCTION
POWER-ON
LED
REMOTE
ON/OFF
SWITCHES
AUTO
THROTTLE
LOW DC
WARNING
1
2
3
4
5
6
7
8
9
(26) Mounting Brackets ( 2 )
(27) Air Exhaust Vents
(28) Side entry for negative DC input cable
(29) Side entry for positive DC input cable
(30) Positive DC Input Contact
(31) Negative DC Input Contact
(32) Remote Control Terminal Block
A 9-position terminal block is provided for connecting optional, customer supplied remote control
and remote display wiring. Please note that any wiring to this terminal block is optional.
Figure 6Remote Control Terminal Block
_____________________________________________
Terminals 1,2 and 3 Remote Switch terminals.
See item (32.1) and Figure 7.
_____________________________________________
Terminals 4 and 5 Remote ‘Inverter ON' LED.
See item (32.2).
____________________________________________
Terminal 6 (Volt Guard Feature) Provides
ground control based on battery
voltage. See item (32.3) & Fig 8.
_____________________________________________
Terminal 8 Provides ground control for a
remote Low Battery Warning
Device. See item (32.5) & Fig 9.
_____________________________________________
Terminal 7 and 9 Terminals 7 and 9 are NOT USED.

Component Identification and
Description of Operation
IT SERIES Industrial True Sine Wave Inverter Owners Manual
17
(32.1) Remote ON/OFF Switch Terminals 1, 2 and 3
The IT SERIES Inverter allows four styles of remote control wiring for customers who wish to
supply and install a remote control switch or switches.
Figure 7Remote Control Switch Wiring Variations
Standard No Remote Switch.
(Factory jumper connecting
terminals 1 and 2.)
Style One Series Remote Switch
powered by Terminal 2.
(Factory jumper removed)
Style Two Series Remote Switch
powered externally.
(Factory jumper removed.)
Style Three Parallel Remote Switch
powered by Terminal 2.
(Factory jumper connecting
terminals 1 and 2.)
Style Four Parallel Remote Switch
powered externally.
(Factory jumper connecting
terminals 1 and 2.)
(32.2) Remote Inverter Indicator Light (LED) Terminals 4 and 5
(See also item (10) Inverter Indicator Light
Use Terminals 4 and 5 to operate a customer supplied remote Inverter LED through a 470-ohm
resistor. The LED will light when the inverter is ON or in Load Demand Mode. A remote Inverter
LED does not blink when the inverter is in Load Demand Mode.
9 POS BLOCK
1
2
3
INTERNAL WIRING
INVERTER ON/OFF
+12/24VDC
9 POS BLOCK
INVERTER
1
2
3
INTERNAL WIRING
9 POS BLOCK
1
2
3
INTERNAL WIRING
9 POS BLOCK
1
2
3
INTERNAL WIRING
9 POS BLOCK
1
2
3
INTERNAL WIRING
SPST
REMOTE
SPST
REMOTE
JUMPER
JUMPER
JUMPER
+12/24VDC
1A FUSE
1A FUSE
SPST
REMOTE
SPST
REMOTE
+12/24VDC
INVERTER ON/OFF
+12/24VDC
INVERTER
INVERTER ON/OFF
+12/24VDC
INVERTER
INVERTER ON/OFF
+12/24VDC
INVERTER
INVERTER ON/OFF
+12/24VDC
INVERTER

Component Identification and
Description of Operation
IT SERIES Industrial True Sine Wave Inverter Owners Manual
18
(32.3) Auto Throttle Control (Volt Guard) Terminal 6
(See also item (4) Auto Throttle Indicator Light)
The Auto Throttle Control (Volt Guard Feature) provides a ‘ground signal’ at Terminal 6 and
turns ON the Auto Throttle Indicator Light whenever battery voltage remains below 12.6 (25.2)
volts for more than 15 seconds. The ‘ground signal’ and the indicator light both turn OFF after
battery voltage remains above 13.8 (27.0) volts for 15 seconds. The circuit is designed to
provide ‘ground control’ for a Bosch relay, Vanner part number 05235 or equal.
Use the Volt Guard Feature to control an automatic throttle on vehicles where the inverter is
required to operate continuous heavy AC loads or where other heavy DC loads are present. By
controlling the auto throttle in reference to battery voltage, the Volt Guard Feature insures that
the vehicle alternator produces maximum output when needed.
Use the Bosch relay to control the automatic throttle, Vanner 73-46 Automatic Throttle or equal.
Install a ½ amp in-line fuse near the inverter as shown. The sketch below follows the 73-46
Automatic Throttle wiring instructions as for a Dynamic Inverter installation. This requires
separating the input signal circuit from the input power circuit by cutting the Red 18GA jumper on
the Auto Throttle Control Module. The Bosch relay may also control the Auto Throttle via the
ground similar to the Volt Guard circuit shown in the 73-46 Auto Throttle instructions. For ground
control, route the Auto Throttle’s white/black wire through the Bosch relay’s N.O. contacts.
Figure 8Auto Throttle Control Diagram (Volt Guard Feature)
9 POS BLOCK
INTERNAL WIRING
1/2 AMP
FUSE
BOSCH RELAY
05235
12VDC
HOT IN RUN
VANNER 73-46
AUTO-THROTTLE
CONTROL MODULE
RED 18
1 AMP
FUSE
VOLT GUARD CIRCUITRY
6
(32.4) Terminal 7 Not used.

Component Identification and
Description of Operation
IT SERIES Industrial True Sine Wave Inverter Owners Manual
19
(32.5) Remote Low Battery Warning Terminal 8
(See also item (5) Low Battery Warning Indicator Light (Low DC Warning)
Terminal 8 is designed to provide ground control for a Bosch relay, Vanner part number 05235
or equal, to operate in conjunction with the Low DC Warning Indicator Light. Use the Bosch relay
to operate an audible alarm, lights or other warning device. The warning will alert personnel that
battery voltage has fallen to 11 (22) volts and automatic inverter shut down for low battery
voltage at 10.5 (21) volts is imminent.
Install a ½ amp in-line fuse near the inverter as shown.
Figure 9Remote Low Battery Warning
9 POS BLOCK
INTERNAL WIRING
1/2 AMP
FUSE
BOSCH RELAY
05235
12VDC
HOT IN RUN
ALARM
LOW DC SHUTDOWN CIRCUITRY
1 AMP
FUSE
8
(32.6) Terminal 9 Not used.
(33) GFCI Duplex Receptacle
The GFCI is protected by 15 amp Circuit Breaker CB-2 and protects terminal block Output AC-2.
(34) AC Output Wiring Compartment
(35) Cooling Fan (Not shown)
The cooling air intake fan is located on the back of the inverter. Air is drawn in at the back of the
inverter and is exhausted on both sides. Allow a minimum of 1½” clearance (40 mm) at the back of
the inverter and on both sides to insure proper cooling.

Installation and Start-up
IT SERIES Industrial True Sine Wave Inverter Owners Manual
20
5INSTALLATION and START-UP
Unpacking the Inverter
1. Inspect the shipping container and equipment for loose or damaged parts. If any damage is found,
immediately notify the freight carrier.
Inverter Installation Considerations
1. Mounting: Locate a secure, dry, flat horizontal or vertical surface large enough to mount the inverter.
The location should be as close to the battery as possible, usually within six feet, but not in the same
compartment and should provide adequate ventilation while the inverter is operating. The location
must be clean, dry and free from road spray, dripping water or other moisture contamination.
2. Cooling Fan Clearance: The mounting location must allow unobstructed airflow for cooling. Allow a
minimum clearance of 1½ inches (40 mm) on the left, right and back sides of the inverter. The
Cooling Fan is a thermostatically controlled intake fan. Air is drawn into the inverter from the backside
and exhausted through vents on the left and right sides. Obstruction of the fan intake or the exhaust
vents will diminish the inverter output capacity due to overheating.
DC Wiring Considerations
1. A DC FUSE IS REQUIRED to properly protect the inverter in case the battery cables are connected
backward (reverse polarity).
2. The wiring of your inverter installation should conform to the National Electric Code (NEC) and any
other state or local codes in effect at the time of installation. These codes have been written for your
protection and their requirements should be followed. Article 551 of the NEC requires any DC cable
from a battery, which measures longer than 18 inches along its length, be protected by a fuse.
3. BE AWARE, as a large number of capacitors become charged upon completion of the DC circuit,
THERE WILL BE A LARGE SPARK when the last battery connection is made. The spark is normal
and will occur every time the batteries are connected. It is advisable to make the last DC connection
at the input fuse, not at the battery, to reduce the risk of battery explosion.
4. Route the AC output wiring and DC power wiring with as much physical separation as possible from
low voltage wiring such as audio and video signal wires.
5. Route the DC positive and negative cables as close together as possible and use cable ties to keep
them together. This reduces electromagnetic radiation that could interfere with sensitive electronics.
6. If passing through steel or other ferrous metal walls, the DC input cables need to pass through the
same hole to prevent causing a transformer effect. If two holes are required, cut a slot to connect the
two holes to prevent heating of the ferrous metal.