Generac Power Systems RXSW100A3CUL User manual

Owner’s Manual
For
Automatic Transfer Switch
100 & 200 Amp, Service Entrance
Model Number
RXSW100A3CUL
RXSW200A3CUL
SERIAL NUMBER: _________________________
DATE PURCHASED:________________________
WWW.GENERAC.COM
888-436-3722
Para español , visita: http://www.generac.com/service-support/product-support-lookup
Pour le français, visiter : http://www.generac.com/service-support/product-support-lookup
SAVE THIS MANUAL FOR FUTURE REFERENCE

ii Automatic Transfer Switch Owner’s Manual
(000393)
WARNING
Operating, servicing and maintaining this
equipment can expose you to chemicals
including engine exhaust, carbon monoxide,
phthalates, and lead, which are known to the
State of California to cause cancer and birth
defects or other reproductive harm. To
minimize exposure, avoid breathing exhaust,
do not idle the engine except as necessary,
service your equipment in a well-ventilated
area and wear gloves or wash your hands
frequently when servicing your equipment.
For more information go to
www.P65Warnings.ca.gov.

Automatic Transfer Switch Owner’s Manual iii
Section 1: Safety
Introduction ..........................................................1
Safety Rules .........................................................1
Safety Symbols and Meanings ...........................1
Electrical Hazards ................................................2
General Hazards ..................................................3
Section 2: General Information
Unpacking ............................................................5
Equipment Description .......................................5
Transfer Switch Mechanism ........................................5
Utility Service Circuit Breaker ......................................6
Transfer Switch Data Decal ................................6
Transfer Switch Enclosure .................................6
Safe Use of Transfer Switch ...............................6
Load Management Options .................................6
Smart A/C Module (SACM) .........................................7
Smart Management Module (SMM) ............................7
Application Considerations ..........................................7
Section 3: Installation
Introduction to Installation .................................9
Mounting ...............................................................9
Open Enclosure ...................................................9
Connecting Power Source and Generator Power
Supply ..........................................................10
Connecting Start Circuit Wires .........................11
Connecting SACM .............................................11
Control of Air Conditioner Load .................................11
Auxiliary Contact ...............................................13
Fault Current Label ............................................13
Section 4: Operation
Functional Tests and Adjustments .................. 15
Manual Operation .............................................. 15
Close to Utility Source Side .......................................15
Close to Generator Source Side ...............................16
Return to Utility Source Side .....................................16
Voltage Checks .................................................. 16
Utility Voltage Checks ...............................................16
Generator Voltage Checks ........................................16
Generator Tests Under Load ............................ 16
Checking Automatic Operation ........................ 17
Installation Summary ........................................ 17
Shutting Generator Down While Under Load Or
During A Utility Outage .............................. 17
Preparing for Maintenance ............................... 18
Testing The SACM ............................................. 18
SACM Fuse Service ........................................... 18
Testing The SMM ............................................... 18
Section 5: Drawings and Diagrams
Installation Drawing .......................................... 19
No. 100000027062 ....................................................19
Interconnection Drawing .................................. 20
No. 100000027057—page 1 of 2 ..............................20
No. 100000027057—page 2 of 2 ..............................21
Table of Contents

iv Automatic Transfer Switch Owner’s Manual
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Safety
Automatic Transfer Switch Owner’s Manual 1
Section 1: Safety
Introduction
Thank you for purchasing a Generac Power Systems Inc.
product. This unit has been designed to provide high
performance, efficient operation, and years of use when
maintained properly.
Read this manual thoroughly and understand all of the
instructions, cautions, and warnings before using this
equipment. If any section of the manual is not
understood, contact your nearest authorized dealer, or
contact Generac Customer Service at 1-888-436-3722
(1-888-GENERAC), or www.generac.com with any
questions or concerns.
The owner is responsible for proper maintenance and
safe use of the equipment. Before operating or servicing
this transfer switch:
•Study all warnings in this manual and on the
product carefully.
•Become familiar with this manual and the unit
before use.
•Refer to the installation sections of the manual for
instructions on final assembly procedures. Follow
the instructions completely.
Save these instructions for future reference. ALWAYS
supply this manual to any individual that will use this
equipment.
The information in this manual is accurate based on
products produced at the time of publication. The
manufacturer reserves the right to make technical
updates, corrections, and product revisions at any time
without notice.
Safety Rules
The manufacturer cannot anticipate every possible
circumstance that might involve a hazard. The warnings
in this manual, and on tags and decals affixed to the unit
are, therefore, not all inclusive. If using a procedure, work
method or operating technique that the manufacturer
does not specifically recommend, verify that it is safe for
others. Also make sure the procedure, work method or
operating technique utilized does not render the
equipment unsafe.
Safety Symbols and Meanings
Throughout this publication, and on tags and decals
affixed to the transfer switch, DANGER, WARNING,
CAUTION and NOTE blocks are used to alert personnel
to special instructions about a particular operation that
may be hazardous if performed incorrectly or carelessly.
Observe them carefully. Their definitions are as follows:
NOTE: Notes contain additional information important to
a procedure and will be found within the regular text of
this manual.
These safety alerts cannot eliminate the hazards that
they indicate. Common sense and strict compliance with
the special instructions while performing the action or
service are essential to preventing accidents.
(000100a)
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
(000001)
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
(000002)
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
(000003)
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.

Safety
2Automatic Transfer Switch Owner’s Manual
Electrical Hazards
(000129)
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with live
terminals will result in death or serious injury.
(000104)
DANGER
Electrocution. Water contact with a power
source, if not avoided, will result in death
or serious injury.
(000145)
DANGER
Electrocution. In the event of electrical accident,
immediately shut power OFF. Use non-conductive
implements to free victim from live conductor. Apply
first aid and get medical help. Failure to do so will
result in death or serious injury.
(000237)
DANGER
Electrical backfeed. Use only approved switchgear to
isolate generator from the normal power source.
Failure to do so will result in death, serious injury,
and equipment damage.
(000195)
DANGER
Electrocution, equipment and property damage.
Handle transfer switches carefully when installing.
Never install a damaged transfer switch. Doing so
could result in death or serious injury, equipment
and property damage.
(000123)
DANGER
Electrocution. Turn utility supply OFF before
working on utility connections of the transfer
switch. Failure to do so will result in death or
serious injury.
(000157)
DANGER
Electrocution. Do not disable or modify the
connection box door safety switch. Doing so
will result in death or serious injury.
Automatic start-up. Disconnect utility power and
render unit inoperable before working on unit.
Failure to do so will result in death or serious injury.
(000191)
DANGER
(000119)
Equipment malfunction. Installing a dirty or damaged
transfer switch will cause equipment malfunction and
will result in death or serious injury.
DANGER
(000155a)
WARNING
Electric shock. Only a trained and licensed electrician
should perform wiring and connections to unit. Failure
to follow proper installation requirements could result in
death, serious injury, and equipment or property damage.
(000120)
CAUTION
Equipment damage. Verify all conductors are tightened
to the factory specified torque value. Failure to do so
could result in damage to the switch base.
(000121)
CAUTION
Equipment damage. Perform functional tests in the
exact order they are presented in the manual.
Failure to do so could result in equipment damage.
(000134a)
CAUTION
Equipment damage. Exceeding rated voltage and
current will damage the auxiliary contacts. Verify
that voltage and current are within specification
before energizing this equipment.

Safety
Automatic Transfer Switch Owner’s Manual 3
General Hazards
•Competent, qualified personnel should install,
operate and service this equipment. Adhere strictly
to local, state and national electrical and building
codes. When using this equipment, comply with
regulations established by the National Electrical
Code (NEC), Canadian Electrical Code (CE/CSA
C22.1), CSA Standard; the Occupational Safety
and Health Administration (OSHA), or the local
agency for workplace health and safety.
•If working on this equipment while standing on
metal or concrete, place insulative mats over a dry
wood platform. Work on this equipment only while
standing on such insulative mats.
•Never work on this equipment while physically or
mentally fatigued.
•Any voltage measurements should be performed
with a meter that meets UL/CUL3111 safety
standards, and meets or exceeds overvoltage
class CAT III.
(000237)
DANGER
Electrical backfeed. Use only approved switchgear to
isolate generator from the normal power source.
Failure to do so will result in death, serious injury,
and equipment damage.
(000129)
DANGER
Electrocution. High voltage is present at
transfer switch and terminals. Contact with live
terminals will result in death or serious injury.
(000123)
DANGER
Electrocution. Turn utility supply OFF before
working on utility connections of the transfer
switch. Failure to do so will result in death or
serious injury.
(000104)
DANGER
Electrocution. Water contact with a power
source, if not avoided, will result in death
or serious injury.
(000188)
DANGER
Electrocution. Do not wear jewelry while
working on this equipment. Doing so will
result in death or serious injury.
(000213)
DANGER
Electrocution. Only authorized personnel should
access transfer switch interior. Transfer switch
doors should be kept closed and locked. Failure to
do so will result in death or serious injury.
Automatic start-up. Disconnect utility power and
render unit inoperable before working on unit.
Failure to do so will result in death or serious injury.
(000191)
DANGER
(000145)
DANGER
Electrocution. In the event of electrical accident,
immediately shut power OFF. Use non-conductive
implements to free victim from live conductor. Apply
first aid and get medical help. Failure to do so will
result in death or serious injury.
(000209b)
WARNING
Loss of life. This product is not intended to
be used in a critical life support application.
Failure to adhere to this warning could result
in death or serious injury.
WARNING
Equipment damage. This unit is not intended for use as a
prime power source. It is intended for use as an intermediate
power supply in the event of temporary power outage only.
Doing so could result in death, serious injury, and
equipment damage. (000247a)

Safety
4Automatic Transfer Switch Owner’s Manual
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General Information
Automatic Transfer Switch Owner’s Manual 5
Section 2: General Information
Unpacking
Carefully unpack the transfer switch. Inspect closely for
any damage that might have occurred during shipment.
The purchaser must file with the carrier any claims for
loss or damage incurred while in transit.
Check that all packing material is completely removed
from the switch prior to installation.
Equipment Description
This automatic transfer switch is used for transferring
electrical load from a utility (normal) power source to a
generator (standby) power source. Transfer of electrical
loads occurs automatically when the utility power source
has failed or is substantially reduced and the generator
source voltage and frequency have reached an
acceptable level. The transfer switch prevents electrical
feedback between two different power sources (such as
the utility and generator sources) and, for that reason,
codes require it in all standby electric system installations.
The transfer switch consists of a transfer mechanism,
utility service disconnect circuit breaker (if equipped), and
a Smart A/C module incorporating fuses and two terminal
blocks for transfer switch connections.
This UL/CUL listed transfer switch has locking provisions
for the utility entry cabinet. In addition, it has a lockout/
tagout provision for the service entrance circuit breaker.
Transfer Switch Mechanism
See Figure 2-1. This switch is used with a single-phase
system when the single-phase neutral line is to be
connected to a neutral lug and is not to be switched.
Solderless, screw-type terminal lugs are standard.
The conductor size range is as follows:
This transfer switch is suitable for control of motors, electric
discharge lamps, tungsten filament and electric heating
equipment where the sum of motor full load ampere ratings
and the ampere ratings of other loads do not exceed the
ampere rating of the switch and the tungsten load does not
exceed 30 percent of the switch rating.
This UL/CUL listed transfer switch is for use in optional
standby systems only.
A 100A rated switch is suitable for use on circuits capable
of delivering not more than 10,000 RMS symmetrical
amperes, 250 VAC maximum, when protected by a 100A
maximum circuit breaker (Siemens types QP or BQ) or
150A maximum circuit breaker (Square D Q2,
Westinghouse CA-CAH, General Electric TQ2 and
Siemens QJ2).
A 200A rated switch is suitable for use on a circuit
capable of 22,000 RMS symmetrical amperes, 240 VAC
when protected by a circuit breaker without an adjustable
short time response or by fuses.
Figure 2-1. Typical Single-Phase ATS Transfer
Mechanism
Switch
Rating Wire Range Conductor Tightening Torque
100A #14-1/0 AWG (Cu/Al) 50 in-lbs (5.6 Nm)
200A #6-250 MCM (Cu/Al) 275 in-lbs (31 Nm) A Utility Closing Coil
B Generator Closing Coil
C Utility Lugs (N1 & N2)
D Generator Lugs (E1 & E2)
E Load Lugs (T1 & T2)
000219
A
B
C
D
E

General Information
6Automatic Transfer Switch Owner’s Manual
Utility Service Circuit Breaker
The utility service and generator disconnect circuit
breakers for 100 amp models are:
•Type BQ, 2-pole
•10,000 A/C
•120/240VAC, 100A
•50/60 Hertz
•Wire range: #1 - #8 AWG (Cu/Al)
•The conductor tightening torque is 50 in-lbs. (5.6
Nm).
The utility service circuit breakers for 200 amp models
are:
•Type 225AF, 2-pole
•22,000 A/C
•120/240VAC, 200A
•50/60 Hertz
•Wire range:
– Line: 300 MCM - 6 STR (Cu/Al)
– Load - ATS: 250 MCM - 6 STR (Cu/Al)
•The conductor tightening torque is:
– Line: 375 in-lbs (42.4 Nm)
– Load - ATS: 275 in-lbs. (31 Nm)
Transfer Switch Data Decal
See Figure 2-2 . A data decal is permanently affixed to the
transfer switch enclosure. Use this transfer switch only
with the specific limits shown on the data decal and on
other decals and labels that may be affixed to the switch.
This will prevent damage to equipment and property.
When requesting information or ordering parts for this
equipment, make sure to include all information from the
data decal.
For future reference, record the Model and Serial numbers
in the space provided on the front cover of this manual.
Figure 2-2. Data Decal Location
Transfer Switch Enclosure
The standard switch enclosure is a National Electrical
Manufacturer’s Association (NEMA) and UL/CUL 3R
type. UL/CUL and NEMA 3R (indoor/outdoor rated) type
enclosures primarily provide a degree of protection
against falling rain and sleet; are undamaged by the
formation of ice on the enclosure.
Safe Use of Transfer Switch
Before installing, operating or servicing this equipment,
read the Safety Rules carefully. Comply strictly with all
Safety Rules to prevent accidents and/or damage to the
equipment. The manufacturer recommends that a copy
of the Safety Rules be posted near the transfer switch.
Also, be sure to read all instructions and information
found on tags, labels and decals affixed to the
equipment.
Two publications that outline the safe use of transfer
switches are the following:
•Canadian Electrical Code CE; CSA C22.1
•NFPA 70E: Standard for Electrical Safety In The
Workplace
•UL/CUL 1008: Standard for Safety—Automatic
Transfer Switches
NOTE: It is essential to use the latest version of any
standard to guarantee correct and current information.
Load Management Options
Load management systems are designed to work
together to prevent a generator from being overloaded by
large appliance loads. A Smart A/C Module (SACM) is
provided as standard equipment with this switch. An
optional Smart Management Module (SMM) is also
available.
006487
(000100a)
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.