Generac Power Systems RXGW20SHA3 Manuel utilisateur

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: 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

003722

ii Automatic Transfer Switch Owner’s Manual

(000393a)

WARNING

CANCER AND REPRODUCTIVE HARM

www.P65Warnings.ca.gov.

Automatic Transfer Switch Owner’s Manual iii

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

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

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

Table of Contents

iv Automatic Transfer Switch Owner’s Manual

This page intentionally left blank.

Safety Rules & General Information

Automatic Transfer Switch Owner’s Manual 1

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 www.generac.com for start-

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.

Safety Rules

The manufacturer cannot anticipate every possible cir-

cumstance 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:

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

(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.

Safety Rules & General Information

2Automatic Transfer Switch Owner’s Manual

IMPORTANT NOTE: See individual unit specifica-

tions for required maintenance and run times per-

taining to use.

•Competent, qualified personnel should install,

operate, and service this equipment. Strictly com-

ply to local, state, and national electrical and build-

ing 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.

Electrical Hazards

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

Safety Rules & General Information

Automatic Transfer Switch Owner’s Manual 3

(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 Rules & General Information

4Automatic Transfer Switch Owner’s Manual

This page intentionally left blank.

Installation

Automatic Transfer Switch Owner’s Manual 5

Section 2: 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 wall-

mounted. See Drawings and Diagrams.

This transfer switch is mounted in a UL type 3R enclo-

sure. 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.

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.

Figure 2-1. Open Enclosure

(000119)

Equipment malfunction. Installing a dirty or damaged

transfer switch will cause equipment malfunction and

will result in death or serious injury.

DANGER

004086a

Installation

6Automatic Transfer Switch Owner’s Manual

Installing Breakers

See Figure 2-2. Insert tab on each breaker (A) into the

hook on the bus (B). Push breaker into bus until it snaps

into place.

Figure 2-2. Install Breakers

NOTE: The following 1 in circuit breaker manufacturers

are permitted to be installed: Siemens, Murray, Eaton

BR, and Square D Homeline.

Installing Branch Circuit Conductors

1. Install correctly sized branch circuit conductors into

transfer switch. Knockouts can be made in the field

as needed.

2. Connect ungrounded branch circuit conductors

(hot conductors) to a correctly sized circuit breaker

approved for use with the transfer switch.

3. Terminate neutral conductor and equipment

grounding conductor of the branch circuit at neu-

tral/equipment ground terminal bars.

4. Size all conductors, raceways, conduits, and junc-

tion boxes, if required, to the applicable NEC code

articles and follow NEC installation requirements

for wiring method(s) selected.

NOTE: Multi-wire branch circuits must be installed in

accordance with NEC Article 210.4.

Connecting Power Source and

Generator Power Supply

Installation and interconnection diagrams are provided in

this manual.

NOTE: All installations must comply with national, state,

and local codes. It is the responsibility of the installer to

perform an installation that will pass final electrical

inspection.

1. Connect utility supply at utility service disconnect

circuit breaker terminals N1 and N2. Utility supply

lugs are equipped with the 2017/2020 NEC

required finger safe barriers. These barriers must

remain in place after installation.

2. Connect utility neutral conductor to grounded ter-

minal bar. Neutral/grounding conductor terminal

bars are bonded together and to the transfer switch

enclosure through the use of a green main bonding

jumper screw.

3. Connect loads to integrated load center with cus-

tomer-supplied circuit breakers.

4. See Figure 2-1 and Figure 2-3. Connect generator

to generator terminals (E1 and E2) on the transfer

mechanism.

000362

Electrocution. Turn utility and emergency

power supplies to OFF before connecting

power source and load lines. Failure to do so

will result in death or serious injury. (000116)

DANGER

(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.

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