IOTA IIS Series User manual

IIS SERIES
1.5 kW – 16.7 kW models with Fast Transfer Speed (FT)
User’s Manual

114062B System Users Manual
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C A U T I O N
READ ENTIRE MANUAL AND REVIEW ALL DOCUMENTATION BEFORE ATTEMPTING SYSTEM
INSTALLATION
FOR SERVICE OR INSTALLATION INFORMATION:
TELEPHONE: [phone] (24 HR. HOTLINE)
FAX: [phone]
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.

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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.

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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.

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C H A P T E R 1
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 ___________________________

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Service and Support
FOR SERVICE or INSTALLATION INFORMATION
TELEPHONE: [phone]
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

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C H A P T E R 2
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.

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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).
C H A P T E R 3
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.

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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.
C H A P T E R 4
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.

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CH A P T E R 5
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
Key Name Description
Enter (Blue)
Pressing this key will view menus.
Escape (Black)
Pressing this key will exit out of menus and return to the
Identification/Date-Time screen.
[ ◄ ] (Red)
This key functions as Left scroll key.
[ ► ] (Red)
This key functions as Right scroll key.

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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
Function Description
Voltage Input
Measures the AC Input Voltage to the Inverter.
Voltage Output
Measures the AC Output Voltage from the Inverter.
Current Output
Measures the AC Output Current from the Inverter. If there are Normally Off
loads connected, it will read the sum of Normally On and Normally Off
outputs.
Battery Voltage
Measures DC Battery Voltage.
Battery Current
Measures the DC Battery Current. When in charge mode, the current will be
positive. When in Inverter mode, the current will be negative.
Battery
Temperature
Optional feature – measures temperature at the battery.
Internal
Temperature
Measures the ambient temperature inside the system.
Inverter Minutes
Indicates the total minutes the system has run on inverter.
System Days
Indicates the total days the system has been on-line.
VA Output
Indicates the AC Volts-Amps of the Inverter output.
Inverter Watts
Indicates the DC Watts (Battery Power) the Inverter is processing.
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.

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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.

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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
DC Voltage Near Low Battery
48VDC
43VDC
72VDC
65VDC
96VDC
86VDC
120VDC
108VDC
144VDC
130VDC
180VDC
162VDC
240VDC
216VDC
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.

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C H A P T E R 6
SPECIFICATIONS
General Specifications
Input
Voltage 120 or 277Vac 1-phase 2-wire +10% -20%. Contact factory for all other voltages.
Input Power Walk-in Walk-in limiting inrush current to less than 125%, 10 times for 1 line cycle
Input Frequency 60Hz, +/- 3%, 50Hz Available upon request
Synchronizing Slew Rate 1Hz per second nominal
Protection Input Circuit Breaker
Harmonic Distortion < 10%
Power Factor .5 lag/lead
Output
Voltage
120 or 277Vac 1-phase 2-wire. Contact factory for all other voltages.
Static Voltage Load current change +/-2%, battery discharge +/-12.5%
Dynamic Voltage +/- 2% for +/-25% load step change, +/-3% for a 50% load step change, recovery within 3 cycles
Harmonic Distortion < 3% THD for linear load
Overload Fuse protected
Output Frequency 60Hz +/- .05Hz during emergency mode
Load Power Factor .5 lag to .5 lead
Inverter Overload 115% for 10 minutes
Protection Optional Distribution Circuit Breakers
Battery
Type Valve-regulated sealed lead-calcium. Contact factory for additional battery types.
Charger
Microprocessor controlled for various battery types and temperature compensating (recharge per UL924 spec)
Protection Automatic low-battery disconnect; automatic restart upon utility return.
Disconnect Fuse
Optional Runtimes Extended runtimes available. Consult factory for additional information.
Environmental
Altitude < 10,000 feet (above sea level) without derating
Operating Temperature 20 to 30 degree Celsius
Storage Temperature -20 to 70 degrees Celsius (electronics only)
Relative Humidity < 95% (non-condensing)
General
Design Line interactive PWM inverter type utilizing IGBT technology with 2mS transfer time.
Generator Input Compatible with generators.
Control Panel Microprocessor controlled 4 x 20-charactor vacuum fluorescent display with touch pad controls/functions &
scrolling system status
Metering Input & Output Voltage, Battery Voltage, Battery & Output Current, Output VA, Temperature, Inverter Wattage
Alarms High/Low Battery Charger Fault, Near Low Battery, Low Battery, Load Reduction Fault, Output Overload,
High/Low AC Input Volts, High Ambient Temperature, Inverter Fault, Output Fault, Optional Circuit Breaker Trip
Communications
RS-232 port (DB9). Optional E-mail/fax modem.
Manual Maintenance Bypass Optional Internal or optional external without internal distribution breakers.
Alarm Contacts Optional Summary Form "C" Contacts
Warranty 1 year standard warranty includes all parts, labor, & travel expenses within 48 contiguous states. Up to 10 years
prorated warranty on batteries. Extended warranties, preventative maintenance and customized service plans
are available.
Factory Start-up Purchase factory start-up & receive 1 additional year of warranty.
5 Year Service Plan Purchase 5 year service plan & receive free factory start-up.
Physical
Cabinet Freestanding NEMA Type 1
Cooling Forced Air, during emergency mode.
Cable Entry Top or Side
Access Front

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C H A P T E R 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.

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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.

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C H A P T E R 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
SERVICE TO PERFORM:
PERFORM SERVICE EVERY:
3 MONTHS
6 MONTHS
12 MONTHS
1. TEST UNIT:
NOTE: Perform manual test only when critical load is
connected but not required.
----- Output voltage should be present.
----- Confirm operations of front panel indicators.
X
2. INSPECT BATTERIES:
----- All connections are tight.
----- Connections have no corrosion. (Clean if
necessary).
X
CLEAN UNIT: NOTE: Unit must be shut down
during this service.
----- Inspect air vents and clean if necessary.
----- Clean excessive dust from inside cabinet.
----- Clean excessive dust from fan(s).
X
"X" Indicates when to perform service. Lines below the "X" are for the date of service.

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TROUBLE SHOOTING CHART
Battery
Voltage
low
or non
existent
1 2 3 4 5
Battery
voltage
does
not read
properly
after
Installation
of
fresh
cells
4 3 1 2
Battery
acid
leaking
in
cabinet
or
around
tops of
batteries
1 2 4 3
Batteries
require
continuous
addition
of water to
keep proper
level
(optional w/
wet cells)
3 1 2 4
Charger
sta
ys in
HI
charge
1 2 3
Charger
not
charging
properly
,
batteries
low or
dead
2 6 3 4 5 1
System
blows
battery
fuse
3 5 6 2 1 4
Inverter
jitters or
staggers
during a
power
failure
1 3 2
System
noisy,
t
ransformer
hum
during a
power
failure
1 2 3
System
o
verheats,
smells,
smokes,
etc.
3 2 1 4 6 5
AC output
voltage
low
during a
utility
power
failure
3 2 1 4
System
noisy,
excessive
transformer
hum during
normal r
un
conditions
1 2 3
System
draws
excessive
AC inpu
t
curren
t
1 2 3
Inverter
will not
run
during a
power
failure
1 3 4 6 2
11
7
10
9 8 5
S Y
M
P
T
O
M
S
Installation switch on inverter in off position
Shorted I
GBT
module(s)
No AC input vol
tage
Defective inverter
Output volt
-ampere
rating of unit being
ex
ceeded
Ambient temperature too high, vents blocked
Shorted load
Reverse battery diodes shorted
Open battery fuse(s)
Battery polarity
wrong
Defective charger
Battery capacity low
Low water in
battery
(optional w/ wet cells)
Wrong
amount of battery
cells
in series
Batteries dead, low or defective
Transfer module and/or control circuit malfunction
Transformer not connected for proper voltage
THE NUMBER IN THE
CHA
RT INDICATES
ORDER IN WHICH
P
ROBLEMS SHOULD
BE CHECKED
PROBLEMS

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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.