Generac Power Systems RXGW20SHA3 Owner's Manual
003722
Owner’s Manual
For
Automatic Transfer Switch
200 Amp, Single Phase, 240 VAC, Service Rated, 20–40 Circuit Load Center With Pass-Through Lugs
Model Number
RXGW20SHA3
SERIAL NUMBER: _________________________
DATE PURCHASED:________________________
WWW.GENERAC.COM
888-436-3722
Para español , visita:
Pour le français, visiter : http://www.generac.com/service-support/product-support-lookup
http://www.generac.com/service-support/product-support-lookup
SAVE THIS MANUAL FOR FUTURE REFERENCE
(000393a)
WARNING
CANCER AND REPRODUCTIVE HARM
www.P65Warnings.ca.gov.
ii Automatic Transfer Switch Owner’s Manual
Table of Contents
Section 1: Safety Rules & General
Information
Introduction ..........................................................1
Read This Manual Thoroughly ....................................1
Safety Rules .........................................................1
General Hazards ..................................................1
Electrical Hazards ................................................2
Section 2: Installation
Introduction to Installation .................................5
Mounting the Enclosure ......................................5
Opening the Enclosure .......................................5
Installing Breakers ...............................................6
Installing Branch Circuit Conductors ................6
Connecting Power Source and Generator
Power Supply .......................................................6
Connecting Start Circuit Wires ...........................7
Section 4: Drawings and Diagrams
Installation Drawing .......................................... 15
No. 10000047450 ...................................................... 15
Interconnection Drawing .................................. 16
No. 10000047283—Page 1 of 4
(Liquid-Cooled Engine Generator) ............................16
No. 10000047283—Page 2 of 4
(Liquid-Cooled Engine Generator) ............................17
No. 10000047283—Page 3 of 4
(Air-Cooled Engine Generator) ..................................18
No. 10000047283—Page 4 of 4
(Air-Cooled Engine Generator) ..................................19
Connecting SACM ...............................................8
Control of Air Conditioner Load ...................................8
Auxiliary Contact .................................................9
Fault Current Identification Label ......................9
Section 3: Operation
Functional Tests and Adjustments ..................11
Manual Operation ..............................................11
Close to Utility Source Side .......................................11
Close to Generator Source Side ...............................12
Return to Utility Source Side .....................................12
Voltage Checks ..................................................12
Utility Voltage Checks ...............................................12
Generator Voltage Checks ........................................12
Generator Tests Under Load ............................12
Checking Automatic Operation ........................13
Installation Summary ........................................13
Shutting Generator Down While
Under Load .........................................................13
Shutting Generator Down To Perform
Maintenance .......................................................14
Testing the SACM ..............................................14
Testing The SMM ...............................................14
Fuse Removal and Installation .........................14
Automatic Transfer Switch Owner’s Manual iii
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iv Automatic Transfer Switch Owner’s Manual
Safety Rules & General Information
(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.
(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.
(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.
Section 1: Safety Rules & General Information
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 correctly.
The information in this manual is accurate based on
products produced at the time of publication. The manu
facturer reserves the right to make technical updates,
corrections, and product revisions at any time without
notice.
Read This Manual Thoroughly
-
If any section of this manual is not understood, contact
the nearest Independent Authorized Service Dealer
(IASD) or Generac Customer Service at 1-888-436-3722
(1-888-GENERAC), or visit
ing, operating, and servicing procedures. The owner is
responsible for correct maintenance and safe use of the
unit.
This manual must be used in conjunction with all other
supporting product documentation supplied with the
product.
SAVE THESE INSTRUCTIONS for future reference. This
manual contains important instructions that must be fol
lowed during placement, operation, and maintenance of
the unit and its components. Always supply this manual
to any individual that will use this unit, and instruct them
on how to correctly start, operate, and stop the unit in
case of emergency.
www.generac.com for start-
Safety Rules
The manufacturer cannot anticipate every possible circumstance that might involve a hazard. The alerts in this
manual, and on tags and decals affixed to the unit, are
not all inclusive. If using a procedure, work method, or
operating technique that the manufacturer does not spe
cifically recommend, verify that it is safe for others and
does not render the equipment unsafe.
Throughout this publication, and on tags and decals
affixed to the unit, 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. Alert definitions are as follows:
Automatic Transfer Switch Owner’s Manual 1
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.
General Hazards
-
-
Safety Rules & General Information
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)
(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
Electrical Hazards
IMPORTANT NOTE: See individual unit specifications for required maintenance and run times pertaining to use.
• Competent, qualified personnel should install,
operate, and service this equipment. Strictly com
ply to local, state, and national electrical and building codes. When using this equipment, comply with
regulations established by the National Electrical
Code (NEC), 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 UL3111 safety standards,
and meets or exceeds overvoltage class CAT III.
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2 Automatic Transfer Switch Owner’s Manual
Safety Rules & General Information
(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.
Automatic Transfer Switch Owner’s Manual 3
Safety Rules & General Information
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4 Automatic Transfer Switch Owner’s Manual
Section 2: Installation
(000119)
Equipment malfunction. Installing a dirty or damaged
transfer switch will cause equipment malfunction and
will result in death or serious injury.
DANGER
004086a
A
B
C
D
E
F
H
G
J
Installation
Introduction to Installation
This equipment has been wired and tested at the factory.
Installing the transfer switch includes the following proce
dures:
• Mounting the enclosure.
• Connecting power source and load leads.
• Connecting generator start and sensing circuit.
• Connecting any auxiliary contact (if needed).
• Testing functions.
Mounting the Enclosure
Mounting dimensions for the transfer switch enclosure
are in this manual. Enclosures are typically wallmounted. See
This transfer switch is mounted in a UL type 3R enclosure. It can be mounted outside or inside and should be
based on the layout of installation, convenience, and
proximity to the utility supply and load center.
Drawings and Diagrams.
Install transfer switch as close as possible to electrical
loads that will be connected to it. Mount transfer switch
vertically to a rigid supporting structure. Level all mount
ing points to prevent transfer switch distortion. Use wash-
ers behind mounting holes to level the unit if necessary.
Opening the Enclosure
See Figure 2-1. First, remove outer cover (A):
1. Remove two thumb screws (B).
2. Slide slot (C) over retention tab.
3. Lower cover until clear of top flange (D), and pull
away from enclosure.
Then, remove inner panel (E):
4. Loosen nut (F).
5. Grasp inner panel at two cutouts (G—left and
right). Tilt inner panel as shown, passing nut
through t-slot (H) in inner panel.
6. Lower inner panel until clear of two retention slots
(J—left and right sides), and pull away from enclo
sure.
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Automatic Transfer Switch Owner’s Manual 5
Figure 2-1. Open Enclosure
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