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8 Generac
®
Power Systems, Inc.
Serious injury or damage may occur if not
configured properly. Please consult an
authorized Generac Service Dealer with any
questions.
1.13 TORQUE SPECIFICATIONS
Cylinder Head ................................15 (+ 90° + 90°) ft.lb.
Intake Manifold ....................................................13 ft.lb.
Exhaust Manifold..................................................13 ft.lb.
1.14 ENGINE OIL RECOMMENDATIONS
The unit has been filled with 15W-40 engine oil at the
factory. Use a high-quality detergent oil classified “For
Service CC, SD, SE, 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:
Any attempt to crank or start the engine
before it has been properly serviced with the
recommended oil may result in an engine
failure.
1.15 COOLANT RECOMMENDATIONS
Use a mixture of half low silicate ethylene glycol base
anti-freeze and deionized water. Cooling system
capacity is about 8 U.S. quarts (7.6 liters). Use only
deionized water and only low silicate anti-freeze. If
desired, add a high quality rust inhibitor to the
recommended coolant mixture. When adding
coolant, always add the recommended 50-50
mixture.
Do not use any chromate base rust inhibitor
with ethylene glycol base anti-freeze or
chromiumhydroxide (“green slime”) forms and
will cause overheating. Engines that have
been operated with a chromate base rust
inhibitor must be chemically cleaned before
adding ethylene glycol base anti-freeze. Using
any high silicate anti-freeze boosters or
additives will also cause overheating. Generac
also recommends that any soluble oil inhibitor
is NOT used for this equipment.
1.16 BEFORE INSTALLATION
Before installing this equipment, check the ratings of
both the generator and the transfer switch. Read
“Emergency Isolation Method” and “Total Circuit
Isolation Method” in the installation manual (Part No.
079699).
The generator’s rated wattage/amperage capacity
must be adequate to handle all electrical loads that
the unit will power. You may have to group the critical
(essential) loads together and wire them into a
separate “emergency” distribution panel.
This generator can be installed in conjunction with a
Generac “GTS” type engineered transfer switch, if
desired.
The standard transfer switch included has no
adjustable sensing or controlling circuit boards.
Instead, the generator control console houses a
“Printed Circuit Board Assembly”, which controls all
phases of operation, including engine start up and
load transfer.
2.1 GENERATOR INSTALLATION
Connecting this generator to an electrical
system normally supplied by an electric utility
shall be by means of a transfer switch, so as
to isolate the electric system from the utility
distribution system when the generator is
operating. Failure to isolate the electric
system by these means will result in damage
to the generator and may also result in injury
or death to utility workers due to backfeed of
electrical energy.
If an open bottom is used, the generator is to
be installed over non-combustible materials
and should be located such that combustible
materials are not capable of accumulating
under the generator set.
Only qualified, competent installation contractors or
electricians thoroughly familiar with applicable
codes, standards and regulations should install this
standby electric power system. The installation must
comply strictly with all codes, standards and
regulations pertaining to the installation.
This genset must be installed on a level surface. The
base frame must be level within two (2) inches all
around.
After the system has been installed, do nothing
that might render the installation in
noncompliance with such codes, standards and
regulations.
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DANGER
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DANGER
Section 2 — Installation
Centurion Liquid-cooled 15 kW and 25 kW Generators
Temperature Oil Grade (Recommended)
Above 80° F (27° C) SAE 30W or 15W-40
32° to 80° F (-1° to 27° C) SAE 20W-20 or 15W-40
Below 32° F (0° C) SAE 10W or 15W-40