IOTA IIS Series Single Phase Central Inverters User Manual

IOTA IIS Series Single Phase Central Inverters User Manual

C A U T I O N

READ ENTIRE MANUAL AND REVIEW ALL DOCUMENTATION BEFORE ATTEMPTING SYSTEM INSTALLATION

FOR SERVICE OR INSTALLATION INFORMATION:
TELEPHONE: 610-868-5400 (24 HR. HOTLINE)
FAX: 610-954-8227

FOR YOUR PROTECTION
PLEASE COMPLETE AND RETURN WARRANTY REGISTRATION CARD IMMEDIATELY.

This unit contains LETHAL VOLTAGES. All repairs and service should be performed by AUTHORIZED SERVICE PERSONNEL ONLY! There are NO USER SERVICEABLE PARTS inside this unit.

IMPORTANT SAFEGUARDS

When using electrical equipment, you should always follow basic safety precautions, including the following:

1. READ AND FOLLOW ALL SAFETY INSTRUCTIONS.
2. Do not install the system outdoors.
3. Do not install near gas or electric heaters or in other high-temperature locations.
4. Use caution when servicing batteries. Depending on battery type, batteries contain either acid or alkali and can cause burns to skin and eyes. If battery fluid is spilled on skin or in the eyes, flush with fresh water and contact a physician immediately.
5. Equipment should be mounted in locations where unauthorized personnel will not readily subject it to tampering.
6. The use of accessory equipment not recommended by Manufacturer may cause an unsafe condition and void the warranty.
7. Do not use this equipment for other than its intended use.
8. Qualified service personnel must perform all servicing of this equipment.

SAVE THESE INSTRUCTIONS
The installation and use of this product must comply with all national, federal, state, municipal, or local codes that apply. If you need help, please call Service.

User’s Guide
An on-site permanent log of the inspection, testing, and maintenance of the emergency electrical power supply system shall be maintained in accordance with the Manufacturer’s operating manual. The log shall include:

The date on which the inspection, testing, and maintenance exercise was carried out.

The name of the person(s) who performed the inspection, testing, and maintenance.

A note of any unsatisfactory condition observed or discovered, and the steps taken to correct the condition.

CHAPTER1 INTRODUCTION

Keep this manual and the System Installation Guide in the folder mounted inside the unit.

This unit is a microprocessor controlled PWM (Pulse Width Modulated) pure sine wave based DC to AC power inverter utilizing IGBT technology. It integrates a fully automatic 3-rate battery charger, a solid-state transfer system, control circuitry, self testing and recording digital meter display, and maintenance free sealed lead calcium type batteries. The system components are carefully matched to make the unit a completely self-contained, fully automatic standby power source for operation on all types of lighting loads. The batteries are sized and tested per UL-924 and Life Safety Code ANSI / NFPA 101, providing emergency power for a minimum of 90 minutes.

If the duration of a power failure is greater than the batteries storage capability, the inverter will automatically shut down when the battery voltage reaches 85% of the nominal DC voltage. This feature protects the battery from being permanently damaged from a deep discharge that could cause cell reversal. This battery protection feature is called “Low Voltage Disconnect” or L.V.D.

When the AC power is restored after a full discharge, the system will be ready for another power failure within 24hrs. If another power failure occurs before the 24-hour recharge time, the run time will be decreased.

The front panel display incorporates a 4 x 20 vacuum fluorescent display and a 4-button keypad. All user interface functions are available from the front panel assembly.
Utilizing a small footprint, this unit is for use with any lighting load including quartz, HID, incandescent, and fluorescent and halogen.

HOW TO USE THIS MANUAL
This manual tells you how to start, operate, and communicate with your unit and lets you know how to get more information for special situations.

Please record your unit’s model number, serial number, and part number below. You can find these numbers on the label on the inside right-hand door.

Model Number __
Serial Number __
Part Number ___

Service and Support
FOR SERVICE or INSTALLATION INFORMATION
TELEPHONE: 610-868-5400

NOTE: Please have your unit’s Serial and Model numbers available when you call; this number is located behind the right door.
Web Site: www.iotaengineering.com

CHAPTER2: ENVIRONMENT

Make sure the environment is a clean, cool, dry place with normal ventilation.

Storage Temperature
Store the batteries (in the system or battery cabinet) at -18 to 40°C (0 to 104°F). Batteries have a longer shelf life if they are stored below 25°C (77°F). Keep stored batteries fully charged. Recharge the batteries every 90–120 days. The system or battery cabinet without batteries may be stored at -20 to 70°C (-4 to 158°F).

Ventilation
The air around the unit must be clean, dust-free, and free of corrosive chemicals or other contaminants. Do not place the system or batteries in a sealed room or container.

Operating Temperature
System can operate from 20° to 30°C (68° to 86°F) and up to 95% relative humidity. The batteries’ service life is longer if the operating temperature stays below 25°C (77°F).

Batteries
The temperature should be near 25°C (77°F) for optimum battery performance. Batteries are less efficient at temperatures below 18°C (65°F), and high temperatures reduce battery life. Typically, at about 35°C (95°F), battery life is half of what it would be at a normal temperature of 25°C (77°F). At about 45°C (113°F), battery life is one-fourth of normal.
Make sure that heaters, sunlight, air conditioners, or outside air vents are not directed toward the batteries. These conditions can make the temperature within battery strings vary, which can cause differences in the batteries’ voltages. Eventually, these conditions affect battery performance.

If the batteries are not in the system, remember that the batteries should be installed as close as possible to the unit to reduce DC wiring costs and improve battery performance.
Do not allow tobacco smoking, sparks, or flames in the system location because hydrogen is concentrated under the vent cap of each cell of the battery. Hydrogen is highly explosive, and it is hard to detect because it is colorless, odorless, and lighter than air.

Every type of battery can produce hydrogen gas, even sealed maintenance-free batteries. The gas is vented through the vent caps and into the air, mainly when the unit is charging the batteries. The batteries produce the most hydrogen when maximum voltage is present in fully charged batteries; the batteries do not produce hydrogen during float charging. The amount of current that the charger supplies to the batteries (not the battery ampere-hour) determines how much hydrogen is produced.

High Altitude Operation
The maximum operating ambient temperature drops 1°C per 300m (2°F per 1000 ft) above sea level. Maximum elevation is 3000m (10,000 ft).

CHAPTER3: STARTUP AND SHUTDOWN PROCEDURE

Refer to the Installation Manual to secure the unit and install AC and DC wiring.

STARTUP PROCEDURE
For the initial startup of the system, follow the instructions in the Startup and Warranty Validation Form. Failure to do so will void warranty.

CAUTION: HAZARDOUS VOLTAGES – ONLY QUALFIED SERVICE PERSONNEL SHOULD PERFORM PROCEDURE.

1. Verify that the installation switch located on the inverter chassis is in the OFF position. Verify that AC input is disconnected.
2. Press and hold the DC Pre-charge switch located on the inverter chassis for approximately five seconds and then install the battery fuse. If a large flash occurs, the batteries are not connected properly. Call service immediately.
3. Energize the Mains AC input by turning on the units input circuit breaker and/or the Distribution Panel breaker located upstream from the inverter.
4. Turn the installation switch to the on position. The Front Panel display should now be illuminated and a slight hum should be heard from the inverter transformer. The unit is now charging and the output should be energized.

SHUTDOWN PROCEDURE

1. Interrupt the AC Mains to the machine by the Distribution Panel Breaker or the machines input circuit breaker. The Inverter should then start.
2. Turn the installation switch located on the inverter chassis to the off position. The inverter should stop.
3. Disconnect the main battery fuse located on the inverter chassis.
4. Locate the DC Discharge Switch (S3) and press it for 10 seconds.

CAUTION:
HAZARDOUS VOLTAGES STILL EXIST AT THE BATTERY TERMINAL BLOCK AND WITHIN THE SYSTEM. AUTHORIZED SERVICE TECHNICIANS MUST DISCHARGE DC CAPACITORS AND TURN OFF UTILITY POWER BEFORE SERVICING EQUIPMENT.

WARNING:
DO NOT LEAVE THE SYSTEM SHUTDOWN FOR A PROLONGED LENGTH OF TIME. LEAD BASED BATTERIES WILL EXPERIENCE PERMANENT DAMAGE FROM LACK OF CHARGING.

CHAPTER4: OPERATION

The following is a description of the system status located on the front panel of the Vacuum Fluorescent Display.

AC Present
When the AC Mains is present, the words “LINE PRESENT” will illuminate. If a power failure was long in duration, or the AC mains was disconnected by some other means (Circuit breaker open) the “LINE PRESENT” would not be illuminated. When the control circuit senses that the line has dropped below an acceptable level (Black Out, Brown Out, or Transient), the inverter will energize for at least one minute. So, if the power failure was a momentary glitch, the “LINE PRESENT” would be illuminated but the inverter would be running.

System Ready
When the system has adequate battery voltage to transfer, the words “SYSTEM READY” will illuminate.
This feature prevents damage from multiple deep discharges of the battery.

Battery Charging
When the AC Mains is connected to the line and the battery is charging under normal conditions, the words “BATTERY CHARGING” will illuminate.

Battery Power
When the inverter is producing output power (battery is being discharged), the words “BATTERY POWER” will be illuminated.

Fault
This is a summary Fault indication. When there is a fault condition present, the word “FAULT” will illuminate. To view which fault is present, use the keypad and LCD display feature.

The front panel display will provide the user with a variety of information. It has a full compliment of Meter functions, Control functions and Program functions.

CHAPTER5: FRONT PANEL DISPLAY

The Front Panel Display assembly consists of a 4 x 20 vacuum fluorescent display and a 4-button keypad. The 4 buttons can navigate through all the menus by using the left and right arrow keys, the ENTER and the ESCAPE.

The default menu will scroll between the status screen and the Identification /Date-Time screen. To view the other menu options from the default screen, press the ENTER key, and then press the left or the right arrow key to go to the desired menu.

The Menu’s available are Meter, Test Log, Event Log, Alarm Log, User Setup, Factory Setup, Status, System Information, and Test Mode.

Once the desired menu has been reached, press the ENTER key to gain access to this menu. Once into the menu, use the left or right arrow key to scroll to different functions within the menu. Press the ENTER key again to gain access to the desire function. To exit, press the ESCAPE key until the desired level has been reached. (See figure 5.1)

Figure 5.1 Front Panel Display

Control Panel Keypads
Table 5.1 Keypad Functions

Meter Functions
To get to the meter functions from the default screen, press the ENTER key, scroll to the METER menu using the left or the right arrow key, then press the ENTER key again. Use left or the right arrow key to view the meter function desired.

Table 5.2 Meter Functions

Test Log
To get to the Test log menu from the default screen, press the ENTER key, scroll to the Test log menu using the left or right arrow key, then press the ENTER key again. Use the left or right arrow key to view the test desired, and the press the ENTER key for more information.

The Test log indicates the Date, Time and Duration of the test. It also indicates if it was a monthly or yearly test, and it records the output voltage, the output current, the ambient temperature, and if there were any alarm conditions.

The numbers of tests that can be captured in the test log are 75. The format is first in is first out so; test number one is the most recent test.

Event Log
To get to the Event log menu from the default screen, press the ENTER key, scroll to the Event log menu using the left or right arrow key, then press the ENTER key again. Use the left or right arrow key to view the event desired, and then press the ENTER key for more information.

The Event log is identical to the test log in parameters it stores. The Event log captures data every time there is a transfer from utility power to battery power. The numbers of events that can be captured in the event log are 75. The format is first in is first out so; event number one is the most recent event.

Alarm Log
To get the Alarm log menu from the default screen, press the ENTER key, scroll to the alarm log menu using the left or right arrow key, then press the ENTER key again. Use the left or right arrow key to view the alarm desired, and then press the ENTER key for more information.

Any alarm that has occurred is captured in the Alarm log. The numbers of alarms that can be captured in the alarm log are 75. The format is first in is first out so; alarm number one is the most recent alarm.

Alarms
To get to the Alarm menu from the default screen, press the ENTER key, scroll the Alarm menu using the left or right arrow key, then press the ENTER key again. The alarm menu displays all present alarms. If there are no alarms, the display screen will indicate no alarms.

User Setup
To get to the User Setup menu from the default screen, press the ENTER key, scroll to the User Setup menu using the left or right arrow key, then press the ENTER key again. The display will prompt for a password.
**** The password is left arrow, right arrow, left arrow, and right arrow.

Once the password is entered, the user has access to change the following functions:
Date, Time, Month Test, Year Test, Low VAC, High VAC, Near Low Battery, Low Battery, High Temp, Load Reduction Current.

Date
The parameters are Day of Week, Month, Day, and Year.
To change any of the parameters, use the left or right arrow key depending if you want to increase or decrease. Once the parameter is correct, press the ENTER key and the next parameter can be changed.

Time
The parameters are Hour and Minute. The 24-hour standard is used so 2:00 PM would be 14 hours. Use the left or right arrow key to change the parameters and the ENTER key to scroll between parameters.

Month Test, Year Test
The parameters are Date, Time (Hours and Minutes) use the left or right arrow key to change the parameters and the ENTER key to scroll between parameters.

Low VAC, High VAC, Near Low Battery, Low Battery, High Temperature
Parameters are set in Volts AC, Volts DC, and Degrees Centigrade respectively.
Use the left or right arrow key to turn on or off this alarm. When the alarm is turned on, a number will appear. To change the number, press the ENTER key and then use the left or right arrow key. Once the desired number is reached, press the ENTER key and this will return to the top-level menu.

Table 5.3 Near Low Battery Fault Chart

Load Reduction Current
Parameters are set in Amps AC.
Use the same technique as the above alarms for modification.
Load Reduction Current is a useful diagnostic tool that will automatically generate a fault when the output current is 10 percent higher or lower than the set-point number.

Status
Indicates the Status of the machine – Line Present, Battery Charging, Ready, Battery Power, and if any faults are present.

System Information
Indicates Model Number, Serial Number and Current Software Revision Level of the system.

Test Mode
To initiate a Test and cause the inverter to run on battery power.

CHAPTER 6: SPECIFICATIONS

General Specifications

CHAPTER 7: OPTIONS

MAINTENANCE BYPASS PROCEDURE

CAUTION:
HAZARDOUS VOLTAGES – ONLY QUALFIED SERVICE PERSONNEL SHOULD PERFORM PROCEDURE.

System Into Bypass Mode

1. Open System doors. Locate Maintenance Bypass Switch behind left-hand door on chassis.
2. Turn Maintenance Bypass Switch handle from normal mode (UPS) (10 O’clock position) to clear mode (*) (12 O’clock position) and push handle in, after engaging handle turn to bypass mode (BYPASS) (2 O’clock position).
3. Locate Installation Switch behind right-hand door on chassis. Turn the Installation Switch to the (OFF) position.
4. Locate Input Circuit Breaker (CB1) behind left-hand door on chassis. Turn the Input circuit Breaker to the (OFF) position.
5. Locate Main Battery Fuse behind right-hand door on chassis. Remove Main Battery fuse.

CAUTION:
HAZARDOUS VOLTAGES STILL EXIST AT THE BATTERY TERMINAL BLOCK AND WITHIN THE SYSTEM. AUTHORIZED SERVICE TECHNICIANS MUST DISCHARGE DC CAPACITORS BEFORE SERVICING EQUIPMENT. LOCATE DISCHARGE SWITCH ON INVERTER CHASSIS. PRESS IT FOR 10 SECONDS.

WARNING:
DO NOT LEAVE THE SYSTEM SHUTDOWN FOR A PROLONGED LENGTH OF TIME. LEAD BASED BATTERIES WILL EXPERIENCE PERMANENT DAMAGE FROM LACK OF CHARGING.

Remove all Battery String Fuses from Fuse Holders (10KVA – 16.7KVA Systems).

System On Line From Bypass Mode

1. Verify that the Installation Switch located on inverter chassis is in the (OFF) position.
2. Install all Battery String Fuses. (10KVA – 16.7KVA Systems)
3. Press and hold DC Pre-charge switch located on the inverter chassis for approximately five seconds and then install the Main Battery Fuse on the inverter chassis. If a large flash occurs, the batteries are not connected properly. Call service immediately.
4. Turn the Input Circuit Breaker (CB1) to the (ON) position.
5. Turn the Installation Switch on the inverter chassis to the (ON) position. The Front Panel Display will now be illuminated and a slight hum should be heard from the inverter transformer. The unit is now charging the batteries.
6. Turn the Maintenance Bypass Switch handle from bypass mode (BYPASS) (2 O’clock position) to clear mode (*) (12 O’clock position), then to normal mode (UPS) (10 O’clock position). The emergency equipment is now protected by the inverter system.

CHAPTER 8: MAINTENANCE AND SERVICE

The Self-testing feature of the inverter ensures that the system is tested at least once per month for 5 minutes and once per year for 90 minutes. If there are any problems with the self-tests, the fault log shall indicate which faults occurred. Please see the fault descriptions and troubleshooting guide.

A few simple maintenance operations performed periodically will help ensure many years of trouble free operation. Battery terminals should be checked for tightness and corrosion. If severe corrosion is evident, maintenance is required to correct this situation.

Since the unit depends on unrestricted airflow for cooling of power handling components, it is important to keep the air vents free of any obstruction. If the environment tends to be extremely dusty, occasionally blow away any accumulation of dust on components. Please follow the shutdown procedure before cleaning.

CAUTION: Follow the shutdown procedure (See Chapter 3) before cleaning. An authorized technician only should perform Service!

Table 8.1 Preventive Maintenance Schedule

“X” Indicates when to perform service. Lines below the “X” are for the date of service.

TROUBLE SHOOTING CHART

WARRANTY

For warranty information on IOTA IIS Central Inverters and battery components, visit www.iotaengineering.com or call IOTA Customer Service.

OUT OF WARRANTY REPAIR CHARGES AND LABOR
Contact Field service for current parts and labor rates. A minimum rate will be assessed. The manufacturer will not proceed with repairs of an out of warranty unit until authorization in the form of a purchase order is received from the customer. The unit for repair must be returned prepaid with an RMA number on the carton. For travel to the job site, a quote “Not to Exceed” estimate will be given. A purchase order to cover that amount is required before a trip to the job site is made.

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