Generac Power Systems C Option, 8617, 9555 Operator's Manual

POWER SYSTEMS, INC.

Operator’s Manual

“C” Option Control Panel

This manual should remain with the unit.

NOT IN AUTOMATIC START MODE

OVER

CRANK

OVER SPEED

TEST

RESET

PREHEAT

30 SEC

MAX

PRE ALARM

LOW OFF

HIGH COOL

TEMP.

LOW

OIL

PRESS.

RPM

SENSOR

LOSS

150

200

100

TEMP

START

STOP

300

200

100

AUTO

MANUAL

OFF

FUSE

15-A AG

200

150

100

AMPS

0000 1

TOTAL HOURS

INCREASE

VO LTAG E

ADJUS

PRESS

PRE ALARM

HIGH COOL TEMP

LOW COOL TEMP

ALARM HORN

ON - OFF

HIGH

BATT

VOLTA G E

LOW

BATT

VOLTAGE

RUPTURE

BASIN

FILLING

LOW

FUEL

HIGH

FUEL

Generac®Power Systems, Inc.

Important Safety Instructions

“C” Option Control Panel

SAVE THESE INSTRUCTIONS – The manufacturer suggests that these rules for safe operation be copied and posted in potential hazard areas. Safety should be stressed to all operators and potential operators of this equipment.

Study these SAFETY RULES carefully before installing, operating, or servicing this equipment. Become familiar with this manual and all literature pertaining to the generator set and related equipment. This equipment can operate safely, efficiently, and reliably only if it is properly installed, operated, and maintained. Many accidents are caused by failing to follow simple and fundamental rules or precautions.

Generac cannot possibly anticipate every possible circumstance that might involve a hazard. The warnings in this manual, and on tags and decals affixed to the equipment, are, therefore, not all-inclusive. If using a procedure, work method, or operating technique Generac does not specifically recommend, you must satisfy yourself that it is safe for you and others. Also must make sure the procedure, work method, or operating technique that is used does not render the equipment unsafe.

GENERAL HAZARDS

• For safety reasons, Generac recommends that this equipment be installed and serviced by a Generac Authorized Service Dealer or other qualified electrician or installation technician who is familiar with applicable codes, standards, and regulations. The operator also must comply with all such codes, standards, and regulations.

• When working on this equipment, remain alert at all times. Never work on the equipment when physically or mentally fatigued.

• Inspect the equipment regularly, and promptly repair or replace all worn, damaged or defective parts, using only factory-approved parts.

• Before performing any maintenance on the generator or any related equipment, disconnect the generator’s battery cables and remove panel fuse to prevent accidental startup. Disconnect the cable from the battery post, indicated by a NEGATIVE, NEG, or (–) first. Reconnect that cable last.

ELECTRICAL HAZARDS

• Generators produce dangerous electrical voltages and can cause fatal electrical shock. Avoid contact with bare wires, terminals, connections, etc., while the generator and related equipment are running. Ensure all appropriate covers, guards, and barriers are in place before operating the equipment. If working around an operating unit, stand on an insulated, dry surface to reduce potential shock hazards.

• Do not handle any kind of electrical device while standing in water, while barefoot, or while hands or feet are wet. DANGEROUS ELECTRICAL SHOCK MAY RESULT.

• If people must stand on metal or concrete while installing, operating, servicing, adjusting, or repairing this equipment, place insulative mats over a dry wooden platform. Work on the equipment only while standing on such insulative mats.

• Wire gauge sizes of electrical wiring, cables, and cord sets must be adequate to handle the maximum electrical current (amperage) to which they will be subjected to.

• Before installing or servicing this equipment, make sure that all power voltage supplies are positively TURNED OFF at their source. Failure to do so will result in hazardous and possibly fatal electrical shock.

• When installed with an automatic transfer switch, the generator may crank and start anytime, without warning. To prevent injuries caused by sudden startup, disable the generator’s automatic start circuit before working on, or around, the unit. Then, place a “Do Not Operate” tag on the generator control panel and on the transfer switch.

• In case of an accident caused by electric shock, immediately shut down the source of electrical power. If this is not possible, attempt to free the victim from the live conductor. AVOID DIRECT CONTACT WITH THE VICTIM. Use a nonconducting implement, such as, a rope or board, to free the victim from the live conductor. If the victim is unconscious, apply first aid and get immediate medical help.

• Never wear jewelry when working on this equipment. Jewelry can conduct electricity, resulting in electric shock, or may get caught in moving components, causing injury.

IRE HAZARDS

• For fire safety, the generator and related equipment must be installed and maintained properly. Installation always must comply with applicable codes, standards, laws, and regulations. Adhere strictly to local, state, and national electrical and building codes. Comply with regulations the Occupational Safety and Health Administration (OSHA) has established. Also, ensure that the equipment is installed in accordance with the manufacturer’s instructions and recommendations. Following proper installation, do nothing that might alter a safe installation and render the unit in noncompliance with the aforementioned codes, standards, laws, and regulations.

Table of Contents

“C” Option Control Panel

Generac®Power Systems, Inc. 1

Part I - C Option Control Panel

Safety Rules ....................................Inside Front Cover

Section 1 — General Information ................................2

1.1 Overview ..............................................................2

1.2 Control Panel Components ..................................2

1.3 Optional Equipment ............................................2

1.3.1 Remote Annunciator Panel......................2

1.3.2 Remote Relay Panel ................................2

1.3.3 Additional Options..................................2

1.4 Panel Face Components ......................................2

1.4.1 AC Voltmeter ..........................................2

1.4.2 AC Ammeter ..........................................2

1.4.3 Frequency Meter ....................................2

1.4.4 Line-Phase Selector Switch ....................3

1.4.5 Voltage Adjust Potentiometer ..................3

1.4.6 Coolant Temperature Gauge ..................3

1.4.7 Oil Pressure Gauge ................................3

1.4.8 DC Voltmeter ..........................................3

1.4.9 Hourmeter ..............................................3

1.4.10 Start/Stop Switch....................................4

1.4.11 Auto/Off/Manual Switch ..........................4

1.4.12 Panel Fuse ..............................................4

1.5 Engine Monitor Panel ..........................................4

1.5.1 Not in Automatic Start Mode Lamp ........4

1.5.2 Overcrank Lamp ....................................4

1.5.3 High Coolant Temperature Lamp............4

1.5.4 Overspeed Lamp ....................................4

1.5.5 Low Oil Pressure Lamp ..........................5

1.5.6 RPM Sensor Loss Lamp..........................5

1.5.7 Test/Reset Switch....................................5

1.6 Optional Annunciator Panel ................................5

1.7 Optional Remote Annunciator..............................6

1.8 Optional Alarm Relay ..........................................6

1.9 Preparation Before Startup ..................................6

1.9.1 Prior to Initial Startup ............................6

1.9.2 Startup Inspection ..................................7

Section 2 — Operation ....................................................7

2.1 Operating Unit with Manually-Operated

Transfer Switch ..................................................7

2.2 Operating Unit with Automatic Transfer Switch ..7

2.2.1 Manual Startup and Transfer ................7

2.2.2 Manual Retransfer and Engine

Shutdown ..............................................7

2.2.3 Preventing Automatic Startup ................8

Appendix 1 – Electrical Data ........................................9

Appendix 2 – Exploded Views and Parts Lists ......16

Appendix 3 – Interconnection Diagrams ................24

art II - Remote Annunciator Panels

Section 1 — General Information ..............................29

1.1 Three Light Remote Annunciator ......................29

1.1.1 Installation............................................29

1.2 Five Light Remote Annunciator..........................29

1.2.1 Operation..............................................30

1.2.2 Customer Connections..........................30

1.2.3 Parts Included with Remote Panel ........30

1.3 18 Light Remote Annunciator ............................30

1.3.1 Generator Stop Signals ........................31

1.3.2 Latchable Signals..................................31

1.3.3 Other Lamps ........................................31

1.3.4 Panel Wiring Interconnections ..............31

1.4 Troubleshooting ................................................31

1.5 Annunciated Signals ..........................................32

1.6 Pre-Alarms ........................................................32

Appendix 4 — Electrical Data......................................33

Appendix 5 — Exploded Views and Parts Lists ......41

Appendix 6 — Notes ......................................................47

AUTHORIZED SERVICE

DEALER LOCATION

To locate the nearest GENERAC AUTHORIZED

SERVICE DEALER, please call this number:

1-800-333-1322

DEALER LOCATION INFORMATION

CAN BE OBTAINED AT THIS NUMBER.

1.1 OVERVIEW

The “C” option control panel is an analog generator set control panel designed for Generac’s range of standby generators. It allows for either manual or automatic startup and shutdown.

The panel is housed in a steel sheet metal enclosure that meets NEMA 1 specifications. The front face of the panel includes a number of analog meters and gauges that indicate generator operating conditions, several indicator lamps for annunciation of engine fault shutdowns, and various other generator set controls.

1.2 CONTROL PANEL COMPONENTS

The control panel contains one main printed-circuit board (PCB), the automatic voltage regulator (AVR), optional components, such as battery monitor, dry contact boards, run relay, etc., and terminal blocks for external connections.

To find locations of the circuit board, refer to Appendix 2 for the control panel exploded view.

Remove the 15-amp fuse from the front of the panel during all engine maintenance to guard against accidental or remote startup.

1.3 OPTIONAL EQUIPMENT

1.3.1 REMOTE ANNUNCIATOR PANEL

When connected to the generator via a 19 wire connection link, this multi-light remote indicator panel will display the generator’s status.

1.3.2 DRY CONTACTS

This panel is similar to the remote annunciator, but, in addition to indicator lights, it provides relay contact closures for status (e.g., alarms). The dry contact boards are form C rated contacts. The five function dry contacts are normally open (N.O.). The six function dry contacts are either normally open (N.O.) or normally closed (N.C.).

1.3.3 ADDITIONAL OPTIONS

The following are some of the more frequently requested optional accessories for the “C” option control panel:

• Emergency stop button

• Oil temperature gauge

• Engine run relay

• 100 dBa alarm horn

• Over/Under voltage relay

• Pre-alarm kit

• Control panel heater(s)

• Voltage change over switch (special)

• Battery monitor

• Over/Under frequency relay

• Over/Under current relay

1.4 PANEL FACE COMPONENTS

(FIGURE 1.1, PAGE 3)

1.4.1 AC VOLTMETER

This meter indicates the generator AC output voltage. (Also see “Line-phase Selector Switch” and “Voltage Adjust Potentiometer” in this section). To determine the nominal rated AC voltage of the unit, refer to the unit’s data plate.

NOTE:

Some generators are reconnectable to a variety of voltages. Some units may be equipped with a rotary “Voltage Selector Switch.” Be sure to read the “Generator AC Lead Connections” section in the Owner’s Manual.

1.4.2 AC AMMETER

This meter indicates the current draw of connected electrical loads, in amps. (Also see “Line-phase Selector Switch”). For continuous operation, never exceed the rated maximum continuous current capacity of the generator.

1.4.3 FREQUENCY METER

This meter indicates the generator’s AC output frequency in “Hertz” (cycles per second).

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Generac®Power Systems, Inc. 3

1.4.4 LINE-PHASE SELECTOR SWITCH

This four-position switch permits selection of either line-to-line or line-to-neutral readings on the panel voltmeter and ammeter. Switch positions are as follows:

1.4.5 VOLTAGE ADJUST POTENTIOMETER

This potentiometer permits the operator to “fineadjust” the generator’s AC output voltage. Adjustment range is plus or minus five percent from the midpoint. Turn the knob clockwise to increase voltage, counterclockwise to decrease voltage.

1.4.6 COOLANT TEMPERATURE GAUGE

This gauge indicates the engine coolant temperature. Normal operating temperature should read between 185° to 215°F (85° to 102°C). If coolant temperature exceeds a safe level, the engine shuts down automatically.

NOTE:

Actual coolant temperature reading may vary due to variables, such as, ambient temperature, applied load, or cooling system condition.

1.4.7 OIL PRESSURE GAUGE

This gauge indicates oil pressure during operation. After warm-up, oil pressure should be about 25-90 psi. Generac recommends that the operator record the normal oil pressure during initial startup. Sudden changes in oil pressure after first starting indicate a possible engine problem.

NOTE:

Engine oil pressure may vary, depending on oil viscosity, oil temperature, engine speed, ambient temperature, etc. The engine automatically shuts down if oil pressure drops below a safe level. (10 psi.)

1.4.8 DC AMMETER

The engine is equipped with a belt-driven DC alternator, which charges the battery while the unit is running. This ammeter indicates the rate of charge to the battery during operation. If the needle drops to the left of zero, the battery is discharging. Investigate and correct this problem immediately. Erratic movement of the needle should also be corrected immediately.

1.4.9 HOURMETER

The hourmeter provides a continuous indication of engine/generator operating time, in hours and tenths of hours. Use the hourmeter with the periodic maintenance schedule.

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“C” Option Control Panel

Figure 1.1 – “C” Option Panel Components

Switch Single-phase Units Three-phase units

1 Line E1 to Neutral Line E1 to E2

2 Line E3 to Neutral Line E2 to E3

3 Line E1 to E3 Line E3 to E1

O No Reading No Reading

4 Generac®Power Systems, Inc.

1.4.10 START/STOP SWITCH

Use this switch to crank and start the engine manually, or to shut down an operating engine.

• To crank and start engine, first set the

Auto/Off/Manual switch to its “Manual” position.

• Hold the Start/Stop switch at “Start.” When the

engine starts, release the switch to its center (run) position.

• To shut engine down, move the switch to its “Stop”

position.

1.4.11 AUTO/OFF/MANUAL SWITCH

This safety switch should be used to prevent automatic startup of the engine when working on the engine/generator. Use the switch as follows:

Auto Position

Always set switch to AUTO for automatic system operation. This means that, when this generator is installed with a GTS-type automatic transfer switch, the generator automatically cranks and starts when the utility source voltage drops below a preset level, or the unit exercises, if programmed to do so.

Off Position

The engine cannot be started either automatically or manually. Always set switch to OFF before working on, or around, the engine-generator.

Manual Position

The engine can be cranked and started manually using the panel Start/Stop switch. The engine will not start automatically.

NOTE:

Also see “Engine Monitor Panel.” With switch set to either OFF or MANUAL, a “Not in Automatic Start Mode” lamp lights up on the panel.

1.4.12 PANEL FUSE

This fuse protects the control console’s DC circuits against overload. If the fuse element melts open due to an overload, engine cranking and startup will not be possible. Should fuse replacement become necessary, use only an identical fuse (part number

022676).

1.5 ENGINE MONITOR PANEL

This panel has five advisory shutdown lamps for separate engine fault conditions, plus a “Not in Automatic Start Mode” lamp. Cranking and starting will not be possible while any one, or more, of engine fault conditions lamps is lit, with the exception of “Not in Auto” illuminated in the manual mode. The following apply:

• A “lamp ON” condition indicates that fault condition has been “latched” by DC control/latch-crank circuit board.

• If any one of the lamps is ON (fault condition latched), the engine cannot be cranked either manually or automatically.

• To unlatch a fault (that is, to turn a lamp OFF) and permit cranking, push the Test/Reset switch in. The lamp will then go OFF, allowing for additional cranking.

1.5.1 NOT IN AUTOMATIC START MODE LAMP

This lamp comes ON to indicate that automatic startup of the engine is not possible. The lamp lights up whenever the Auto/Off/Manual switch is set to OFF or MANUAL.

1.5.2 OVERCRANK LAMP

The control console houses a DC control/latch-crank circuit board (the “C” board) that controls engine startup and shutdown. During automatic startup, the engine cranks for about 14 seconds, rests for about eight seconds, and so on, until eight crank-rest cycles have occurred. At the end of eight attempts, cranking stops, and the overcrank lamp goes ON.

1.5.3 HIGH COOLANT TEMPERATURE LAMP

This lamp comes ON if coolant temperature is too high or coolant level is too low. The engine shuts down automatically when such unsafe conditions occur. The following apply:

• If the engine is started with an existing high coolant temperature or low coolant level condition, the engine shuts down, and the lamp comes ON when engine speed reaches about 1000 rpm.

• If the engine starts normally but high temperature/low coolant level develops later, the engine shuts down, and the light comes ON immediately.

1.5.4 OVERSPEED LAMP

An engine overspeed above a safe limit causes the engine to automatically shut down, which turns ON the indicator lamp. The overspeed lamp comes on when the unit is run at a 15% faster rpm than rated.

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“C” Option Control Panel

Generac®Power Systems, Inc. 5

1.5.5 LOW OIL PRESSURE LAMP

This lamp lights up (latches) to indicate low oil pressure in the engine as follows:

• During cranking, after engine has reached 800 to 1000 rpm, the circuit allows four seconds for oil pressure to build.

• In auto mode, if the unit runs above 800-1000 rpm for more than four seconds, and oil pressure is below a safe level, the engine shuts down, but the lamp does NOT go ON. The system then actuates eight restart attempts; the engine shuts down, and the lamp goes ON.

• If the engine starts normally with good oil pressure, but oil pressure drops later, the system waits five seconds for oil pressure to be restored. If pressure is still low after a five-second delay, the engine shuts down, and the lamp goes ON immediately.

1.5.6 RPM SENSOR LOSS LAMP

Units with the “C” Option console are equipped with an rpm sensor, which is mounted directly over the engine flywheel gear teeth. This sensor is a magnetic pickup that emits an electrical pulse at the passage of each flywheel gear tooth. Sensor electrical signals are used by the DC control/latch-crank circuit board as engine speed (rpm) signals. The circuit board uses these rpm signals (a) to establish a starter lockout speed, and (b) to shut down the engine if the engine runs too fast (overspeed). If the rpm signals to the circuit board are lost, engine shutdown occurs, but the lamp will not light, (i.e., the condition will not latch), then, depending on whether the sensor signal loss occurred during a manual or an automatic start attempt, the following events occur:

Manual Startup

If the engine starts within two seconds after cranking begins, shutdown occurs as soon as the Start/Stop switch is released, but without a lamp ON condition (latching does not occur). If engine does not start within two seconds after cranking begins, which disables starting, the rpm sensor loss light goes ON.

Automatic Startup

The engine recranks within about one second after it has stopped. If sensor loss persists, engine shuts down, and lamp lights about two seconds after cranking has restarted.

If engine starts within two seconds after recrank has begun, the starter remains engaged until the two-second delay is over.

1.5.7 TEST/RESET SWITCH

To test all lamps, push this switch in. Following any fault shutdown with any monitor panel lamp illuminated, engine cranking is inhibited. To reset the system (unlatch a fault) and crank the engine again, push the switch in (lamp must go out). If the switch is actuated with the engine running, only the lamps will be tested. The engine will not shut down.

NOTE:

If engine shuts down due to some unmonitored problem (such as, out of fuel or failed ignition system), none of the lamps will come ON. If such an unmonitored shutdown occurs with the Auto/Off/Manual switch set to AUTO, engine recranks and attempts to start for any of the cycles remaining in the eight-crank limit. After all eight crank cycles have been used, the engine shuts down, and the OVERCRANK lamp goes ON.

1.6 OPTIONAL ANNUNCIATOR PANEL

Some units may come equipped with a factoryinstalled annunciator panel having up to nine annunciated fault conditions displayed (Figure 1.2). This optional panel is often called a “prealarm” panel, since it warns of impending problems before an actual fault shutdown occurs.

The panel is designed to monitor various engine condition-sensing devices having normally-open (N.O.) or normally-closed (N.C.) contacts.

Figure 1.2 — Optional Annunciator (Prealarm)

Panel

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Section 1 — General Information

“C” Option Control Panel

PRE-ALARM

LOW OIL

PRESSURE

PRE-ALARM HIGH COOL

TEMP

LOW COOL

TEMP

LOW FUEL

ALARM HORN

ON/OFF

HIGH BATTERY VOLTAG E

LOW BATTERY VOLTAG E

HIGH OIL TEMP

SHUTDOWN

HIGH

OIL TEMP

PRE-ALARM

6 Generac®Power Systems, Inc.

1.7 OPTIONAL REMOTE ANNUNCIATOR

An optional 18-light REMOTE annunciator panel that can be mounted on a wall (Figure 1.3) is also available. For information on the remote annunciator panels, ask the local dealer/distributor or consult the factory. Ask for information on the Models 9555 and 9556 remote annunciator panels. The following apply to the remote annunciator panels:

• It is designed for use with installation having a

Generac Power Systems GTS-type transfer switch and a “C” Option control panel.

• The panel is available in both flush-mounted

(Model 9556) and surface-mounted (Model 9555) configurations.

• The panel has a built-in audible alarm horn, with a

reset switch to turn off the horn without disturbing the lighted indication.

• Remote monitoring of the standby generator set

provides enough information to avoid unnecessary maintenance trips to the generator site.

Figure 1.3 — Optional 18-Light Remote

Annunciator

1.8 STANDARD ALARM RELAY

The generator’s DC control/latch-crank circuit board is equipped with an alarm relay “driver”. All units with “C” Option control panels are equipped with an alarm relay that is connected to the circuit board driver (Figure 1.4). If any one or more of the five annunciated shutdown faults occur, the circuit board driver energizes the optional alarm relay.

A remote-mounted alarm or annunciator device may be connected across the relay contacts so that a failure will turn on the remote alarm or device. The connected alarm device may range from an alarm horn to a warning light to a telephone dialer with a prerecorded message. The alarm relay normally-open, normally-closed, and common contacts are shown in Figure 1.4.

Figure 1.4 — Standard Alarm Relay

1.9 PREPARATION BEFORE STARTUP

The instructions in this section assume that the standby generator has been properly installed, serviced, tested, adjusted, and otherwise prepared for use by a competent, qualified installation contractor. Be sure to read RULES FOR SAFE OPERATION on the inside of the front cover carefully, before attempting to operate this (and related) equipment.

1.9.1 PRIOR TO INITIAL STARTUP

Before starting the generator for the first time, the installer must complete the following:

• Properly locate and properly mount the generator, transfer switch, and other standby system components, in strict compliance with applicable codes, standards, and regulations.

• Make sure the fuel supply system to the generator (a) delivers the correct fuel at the correct pressure, and (b) is properly purged and leak-tested according to code. No fuel leakage is permitted.

• Have the engine crankcase properly filled to the correct level with the recommended oil.

• Have engine cooling system properly filled with recommended coolant mixture. Check the system for leaks and other problems.

• If engine is equipped with a mechanical governor, make sure the governor is properly filled with oil. Use crankcase oil to fill.

• Check engine v-belt tension and belt condition.

• Make sure the generator is properly connected to an approved earth ground.

• The generator battery must be fully charged, properly installed and interconnected, and ready for use.

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“C” Option Control Panel

Generac®Power Systems, Inc. 7

1.9.2 STARTUP INSPECTION

A standard, three-part form entitled “Startup Inspection for Standby Power Systems” (Part No.

67377) must be completed by the installation technician or engineer in order to activate warranty. As stated on the form, inspections are to be performed only by factory-trained personnel. The installer must complete the form and distribute copies as follows:

• White copy: Mail to Generac Service Department, P.O. Box 310, Eagle, WI 53119.

• Pink copy: For service file of installing dealer.

• Yellow copy: For the customer’s records.

2.1 OPERATING UNIT WITH MANUALLY

OPERATED TRANSFER SWITCH

If the generator was installed with a transfer switch capable of manual operation only, the following applies: A manually-operated transfer switch is one that will not provide automatic startup and does not include the intelligence circuit, which comprises of a utility voltage sensor PCB, an inphase monitor PCB, a seven day exerciser PCB, or other type of sensing circuits found in a Closed Transition Transfer Switch (CTTS) or a Bypass Isolation Switch (BIS).

2.2 OPERATING UNIT WITH

AUTOMATIC TRANSFER SWITCH

If the generator has been installed with a Generac “GTS”-type automatic transfer switch, the engine may be started and stopped either automatically or manually.

IMPORTANT: BE SURE TO READ THE APPLICABLE AUTOMATIC TRANSFER SWITCH MANUAL CAREFULLY. DIFFERENCES EXIST BETWEEN TRANSFER SWITCHES.

2.2.1 MANUAL STARTUP AND TRANSFER

To crank and start the engine and to transfer electrical loads to the STANDBY power source, proceed as follows:

• See applicable transfer switch instructions. If so equipped, set the Safety Disconnect Switch to MANUAL.

• On the generator’s Meter and Control Panel, set the Auto/Off/Manual switch to MANUAL.

The safety disconnect switch and the Auto/Off/Manual switches must be set as instructed above, or the generator will crank and start as soon as the utility power to the transfer switch is turned OFF.

• Turn OFF both the NORMAL (utility) and EMERGENCY (standby) power supplies to the transfer switch, using whatever means is provided (such as the main-line circuit breaker(s).

DO NOT attempt manual operation until all power voltage supplies to the transfer switch have been positively turned OFF; otherwise, extremely dangerous---possibly lethal--- electrical shock will result.

• Refer to the instructions that correspond to the installed transfer switch. Manually actuate the switch main contacts to their STANDBY (emergency) position, as outlined in the corresponding manual. LOAD circuit must be connected to the STANDBY power supply before proceeding.

• On the generator console, hold the Start/Stop switch START to crank the engine. Hold it until it begins running, then release the switch to its centered (RUN) position.

• Let the engine warm up and stabilize at no-load.

• Turn ON the STANDBY power supply to the transfer switch, using whatever means provided (such as STANDBY source main-line circuit breaker).

• The generator will now power the load circuits.

2.2.2 MANUAL RETRANSFER AND ENGINE SHUTDOWN

To retransfer LOAD circuits back to the NORMAL (utility) power source and to stop the engine, proceed as follows:

• Turn OFF both the UTILITY and STANDBY power supplies to the transfer switch, using whatever means provided, such as the main-line circuit breaker(s).

• Refer to the applicable transfer switch instructions. Manually actuate the transfer switch main contacts to their utility position (LOAD connected to UTILITY power supply).

• Turn ON the UTILITY power supply to the transfer switch, using whatever means are provided (such as the UTILITY main-line circuit breaker(s).

• Check that the UTILITY voltage is available to the transfer switch (see appropriate transfer switch instructions).

• Let the generator engine run at no-load for a few minutes. Then, set the generator Start/Stop switch to STOP. Wait for the engine to come to a complete stop.

• Reset the system for fully automatic operation.

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Section 2 — Operation

“C” Option Control Panel

DANGER

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2.2.3 PREVENTING AUTOMATIC STARTUP

When installed with an automatic transfer switch, Generac standby generators can crank and start suddenly, without warning, when UTILITY source voltage drops below a preset value. To prevent possible injuries caused by such sudden starts, disable the automatic transfer switch before working on, or around, the generator. Use any one, or more, of the following methods to disable the automatic start function:

• Set the generator’s Auto/Off/Manual switch to OFF. Neither a manual nor an automatic start can be accomplished with this switch set to OFF.

• Remove the fuse from the generator control panel. To remove the fuse, push fuse holder cap in and turn cap counterclockwise. Remove cap and fuse element.

• Refer to the automatic transfer switch instructions. If the transfer switch is so equipped, set its Safety Disconnect switch to MANUAL position to prevent automatic startup and transfer.

• Disconnect battery cable from generator battery post, indicated by a negative, NEG, or (-).

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Section 2 — Operation

“C” Option Control Panel

DANGER