Engine Oil Recommendations; Coolant; Gearbox Lubrication; Fuel System Requirements And Recommendations - Generac Power Systems 3190290100 Owner's Manual

ENGINE OIL RECOMMENDATIONS

The unit has been filled with "break in" 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:
Temperature
Above 75º F (24º C)
40º to 75º F (4.4º to 24º C)
10º to 40º F (-12º to 4.4º C)
Below 10º F (-12º C)

COOLANT

Use a mixture of half low silicate, ethylene glycol base
antifreeze and half deionized water. Use only soft
water and only low silicate antifreeze. A high quality
rust inhibitor is recommended to add to the coolant
mixture. When adding coolant, always add the rec-
ommended 50-50 mixture.
DANGER
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 mouth to siphon coolant from the
radiator, recovery bottle or any container. Wash
hands thoroughly after handling. Never store
used antifreeze in an open container because
animals are attracted to the smell and taste of
antifreeze even though it is poisonous to them.
Do not use any chromate base rust inhibitor
!
with ethylene glycol base antifreeze, or chromi-
um 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 eth-
ylene glycol base antifreeze. Using any high sil-
icate antifreeze boosters or additives also will
cause overheating. We also recommend that
any soluble oil inhibitor is NOT USED for this
equipment.

GEARBOX LUBRICATION

If the generator set is equipped with a gearbox, the
appropriate lubrication is SAE 90 gear lubricant.
8 Generac ® Power Systems, Inc.
Section 1 – General Information
Generac Standby Generator Sets
Oil Grade (Recommended)
SAE 30W
SAE 20W or 15W-40
SAE 10W or 15W-40
SAE 5W or 5W-20
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 no.
46622).
• Gaseous Fuel System: See Chapter 9 of Engine-
Generator Standby Electric Power Systems
Installer's Guide and Reference Manual (part no.
46622).

GENERATOR AC LEAD CONNECTIONS

See "Voltage Codes" on Page 4. This 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 the 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. Therefore, connection of 120-volt
(60 Hz) or 110-volt (50 Hz) loads across leads 11 and
neutral, or across leads 44 and neutral can be made.
Figure 1.1 – Four-lead, Single-phase Stator