Generac Power Systems 004812-3, Owner'S Manual

Page: 8 / 110

6
Section 1 – General Information
Standby Generator Sets
Engine Electrical System:
DC Alternator Output .............................................. 30 amps at 24 volts
Starter Motor .........................................................................24-volt DC
Recommended Battery ................................. Two 12-volt, 90 Ah, 4 DLT
Ground Polarity ................................................................... Negative (–)
1.6.3 ENGINE OIL RECOMMENDATIONS
The unit has been filled with 15W-40 engine oil
at the factory. Use a high-quality detergent oil clas-
sified “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:
1.6.4 COOLANT
Use a mixture of half Propylene glycol base antifreeze
and half deionized water. Use only deionized water
and Propylene glycol antifreeze. When adding cool-
ant, always add the recommended 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.

Propylene 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 propylene glycol base antifreeze. Using any
high silicate antifreeze boosters or additives also
will cause overheating. The manufacturer also
recommends that any soluble oil inhibitor is NOT
USED for this equipment.
1.6.5 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
#046622).
‹
‹
‹
1.7 GENERATOR AC LEAD
CONNECTIONS
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.
1.7.1 FOUR-LEAD, SINGLE-PHASE STATOR
Four-lead generators are dual voltage coils or wind-
ings (Figure 1.1). Units may be assigned the following
voltage code:
• “A” units are rated 120/240VAC, single-phase,
60 Hertz.
Each stator winding in this case delivers a 120VAC
output. Connecting the two windings series results in
a 240VAC output.
The neutral line is formed by a junction of stator
leads 22 and 33. Connect 120VAC loads across leads
11 and neutral, or across leads 44 and neutral.
Figure 1.1 – Four-lead, Single-phase Stator
1.8 GENERATOR AND LOAD
COMPATIBILITY
The generator must be fully compatible with the
rated voltage, phase and frequency of the connected
electrical loads. The generator, connected electrical
devices, or both, can be damaged if voltage, phase
and frequency are not compatible.
NOTE:
This manual assumes that the standby generator
has been properly selected, installed and inter-
connected by a competent, qualified electrician
or installation contractor. Once the installation is
complete, do nothing that may result in noncom-
patibility between the generator and connected
electrical loads.
‹
Temperature Oil Grade (Recommended)
Above 80º F (27º C) SAE 30W or 15W-40
32º to 80º F (-1º to 27º C) SAE 20W-20 or 15W-40
Below 32º F (0º C) SAE 10W or 15W-40