8
Generac
®
Power Systems, Inc.
Serious injury or damage may occur if not con-
figured properly. Please consult an authorized
Generac Service Dealer with any questions.
1.13 TORQUE SPECIFICATIONS
Tighten the bolts from the middle out, in a criss-
cross pattern.
Cylinder Head ....................................50 ft.lb./105 ft.lb./105 ft.lb.
Intake Manifold ....................................48 in.lb./84 in.lb./84 in.lb.
Exhaust Manifold..............................................................25 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:
NOTE:
Synthetic oil is highly recommended in any element
with temperatures above 90° F or below 30° F.
Any attempt to crank or start the engine before
it has been properly serviced with the recom-
mended oil may result in an engine failure.
1.15 COOLANT RECOMMENDATIONS
Use a mixture of half low silicate ethylene glycol base
anti-freeze and half de-ionized water. Cooling system
capacity is about 20 U.S. quarts (19.3 liters). Use only
de-ionized water and only low silicate anti-freeze. If
desired, add a high quality rust inhibitor to the rec-
ommended 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 addi-
tives will also cause overheating. It is also rec-
ommend 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. The critical (essential) loads may
need to be grouped together and wired into a sepa-
rate “emergency” distribution panel.
This generator can be installed in conjunction with a
standard Generac “GTS” type transfer switch, if nec-
essary.
The standard transfer switch has no sensing or con-
trolling 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
STANDBY 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 sys-
tem 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 engine-genera-
tor is to be installed over non-combustible
materials and should be located such that com-
bustible materials are not capable of accumu-
lating 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 regula-
tions pertaining to the installation.
After the system has been installed, do nothing
that might render the installation in noncompli-
ance with such codes, standards and regula-
tions.
NOTE:
For more information about the installation of a
standby system, order
Engine-Generator Standby
Electric Power Systems Installer’s Guide and
Reference Manual
(part #046622) from the
Generac Authorized Service Dealer.
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Section 2 — Installation
Generac Liquid-cooled Generators
Temperature
Oil Grade (Recommended)
Above 80° F (27° C)
SAE 15W-40
32° to 80° F (-1° to 27° C)
SAE 15W-40
Below 32° F (0° C)
SAE 15W-40
