Generac Power Systems 1388490100 User manual

Engine: D5.0
Type: SD125
Model: 1388490100

INTRODUCTION
Thank you for purchasing this model of the standby
generator set product line by Generac Power Systems,
Inc..
Every effort was expended to make sure that the
information and instructions in this manual were
both accurate and current at the time the manual was
written. However, the manufacturer reserves the right
to change, alter or otherwise improve this product(s)
at any time without prior notice.
READ THIS MANUAL THOROUGHLY
If any portion of this manual is not understood, con-
tact the nearest Authorized Service Dealer for start-
ing, operating and servicing procedures.
Throughout this publication, and on tags and decals
affixed to the generator, DANGER, WARNING,
CAUTION and NOTE blocks are used to alert person-
nel to special instructions about a particular service
or operation that may be hazardous if performed
incorrectly or carelessly. Observe them carefully.
Their definitions are as follows:
DANGER
After this heading, read instructions that, if not
strictly complied with, will result in personal injury
or property damage.
After this heading, read instructions that, if not
strictly complied with, may result in personal injury
or property damage.
After this heading, read instructions that, if not
strictly complied with, could result in damage to
equipment and/or property.
NOTE:
After this heading, read explanatory statements
that require special emphasis.
These safety warnings cannot eliminate the hazards
that they indicate. Common sense and strict compli-
ance with the special instructions while performing
the service are essential to preventing accidents.
Four commonly used safety symbols accompany the
DANGER, WARNING and CAUTION blocks. The type
of information each indicates is as follows:
This symbol points out important safety infor-
mation that, if not followed, could endanger
personal safety and/or property of others.
This symbol points out potential explosion
hazard.
This symbol points out potential fire hazard.
This symbol points out potential electrical shock
hazard.
The operator is responsible for proper and safe use
of the equipment. The manufacturer strongly recom-
mends that the operator read this Owner's Manual
and thoroughly understand all instructions before
using this equipment. The manufacturer also strong-
ly recommends instructing other users to properly
start and operate the unit. This prepares them if they
need to operate the equipment in an emergency.
OPERATION AND MAINTENANCE
It is the operator's responsibility to perform all safety
checks, to make sure that all maintenance for safe
operation is performed promptly, and to have the
equipment checked periodically by an Authorized
Service Dealer. Normal maintenance service and
replacement of parts are the responsibility of the
owner/operator and, as such, are not considered
defects in materials or workmanship within the
terms of the warranty. Individual operating habits
and usage contribute to the need for maintenance
service.
Proper maintenance and care of the generator ensure
a minimum number of problems and keep operating
expenses at a minimum. See an Authorized Service
Dealer for service aids and accessories.
Operating instructions presented in this manual
assume that the standby electric system has been
installed by an Authorized Service Dealer or other
competent, qualified contractor. Installation of this
equipment is not a “do-it-yourself” project.
HOW TO OBTAIN SERVICE
When the generator requires servicing or repairs,
contact an Authorized Service Dealer for assistance.
Service technicians are factory-trained and are capa-
ble of handling all service needs.
When contacting an Authorized Service Dealer about
parts and service, always supply the complete model
number of the unit as given on the front cover of this
manual or on the DATA LABEL affixed to the unit.
AUTHORIZED SERVICE
DEALER LOCATION
To locate the nearest AUTHORIZED SERVICE
DEALER, please call this number:
1-800-333-1322
DEALER LOCATION INFORMATION
CAN BE OBTAINED AT THIS NUMBER
or visit the website at
www.generac.com.

8 Generac®Power Systems, Inc.
Section 1 – General Information
Generac Standby Generator Sets
ENGINE OIL RECOMMENDATIONS
The unit has been filled with 15W-40 engine oil
at the factory. Use a high-quality detergent oil classi-
fied “For Service CC, SD, SE or SF.” Detergent oils
keep the engine cleaner and reduce carbon deposits.
Use oil having the following SAE viscosity rating,
based on the ambient temperature range anticipated
before the next oil change:
COOLANT
Use a mixture of half low silicate, ethylene glycol base
antifreeze and half soft water. Use only soft water and
only low silicate antifreeze. If desired, you may add a
high quality rust inhibitor to the recommended
coolant mixture. When adding coolant, always add
the recommended 50-50 mixture.
Do not remove the radiator pressure cap while
the engine is hot or serious burns from boiling
liquid or steam could result.
Ethylene glycol base antifreeze is poisonous.
Do not use your mouth to siphon coolant from
the radiator, recovery bottle or any container.
Wash your hands thoroughly after handling.
Never store used antifreeze in an open contain-
er because animals are attracted to the smell
and taste of antifreeze even though it is poi-
sonous to them.
Do not use any chromate base rust inhibitor with
ethylene glycol base antifreeze, or chromium
hydroxide (“green slime”) will form and cause
overheating. Engines that have been operated
with a chromate base rust inhibitor must be
chemically cleaned before adding ethylene glycol
base antifreeze. Using any high silicate antifreeze
boosters or additives also will cause overheating.
We also recommend that you DO NOT use any
soluble oil inhibitor for this equipment.
GEARBOX LUBRICATION
If your generator set is equipped with a gearbox
(Contact sales for availability.), the appropriate lubri-
cation is SAE 90 gear lubrication.
FUEL SYSTEM REQUIREMENTS
AND RECOMMENDATIONS
• Diesel Fuel System: See Chapter 8 of Engine-
Generator Standby Electric Power Systems Installer’s
Guide and Reference Manual (part #46622).
• Gaseous Fuel System: See Chapter 9 of Engine-
Generator Standby Electric Power Systems Installer’s
Guide and Reference Manual (part #46622).
GENERATOR AC LEAD CONNECTIONS
See “Voltage Codes” on Page 4. Your generator may be
rated at any one of several voltages, either single-
phase or three-phase. The electrical wires in the
unit’s AC connection (lower) panel should be
installed according to the number of leads and the
voltage/phase required for your application. If there
is any question regarding lead connection, refer to
the wiring diagrams at the back of this manual.
Voltage codes apply to the type of stator assembly
installed on a particular generator.
FOUR-LEAD, SINGLE-PHASE STATOR
Four-lead generators are dual voltage coils or wind-
ings (Figure 1.1). Units may be assigned any of the
following voltage codes:
• “A” units are rated 120/240 volts, single-phase,
60 Hertz.
• “M” units are rated 110/220 volts, single-phase,
50 Hertz.
Each stator winding in this case delivers a 110- or
120-volt AC output; connecting the two windings
series results in a 220- or 240-volt AC output.
The neutral line is formed by a junction of stator
leads 22 and 33. Thus, you may connect 120-volt (60
Hz) or 110-volt (50 Hz) loads across leads 11 and
neutral, or across leads 44 and neutral.
Figure 1.1 – Four-lead, Single-phase Stator
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DANGER
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Temperature Oil Grade (Recommended)
Above 86º F (30º C) SAE 40 or 15W-40
32º to 86º F (0º to 30º C) SAE 30 or 15W-40
Below 32º F (0º C) SAE 20 or 15W-40
All Seasons SAE 15W-40