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1.13 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:
Temperature
Above 80° F (27° C)
32° to 80° F (-1° to 27° C)
Below 32° F (0° C)
Any attempt to crank or start the engine
!
before it has been properly serviced with the
recommended oil may result in an engine fail-
ure.
1.14 COOLANT RECOMMENDATIONS
Use a mixture of half low silicate ethylene glycol base
anti-freeze and half 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 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. DO NOT use
any soluble oil inhibitor for this equipment.
1.15 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 Sections 2.5 and 2.6.
The generator's rated wattage/amperage capacity
must be adequate to handle all electrical loads that
the unit will power. It may be necessary to group the
critical (essential) loads together and wire them into
a separate "emergency" distribution panel.
This generator can be installed in conjunction with
an engineered Generac "GTS" type transfer switch, if
necessary.
8
Generac
®
Power Systems, Inc.
Section 2 — Installation
Guardian Liquid-cooled 25 kW Generator
Oil Grade (Recommended)
SAE 30W or 15W-40
SAE 20W-20 or 15W-40
SAE 10W or 15W-40
The standard prepackaged transfer switch does not
have 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
STANDBY GENERATOR
INSTALLATION
DANGER
Connecting this generator to an electrical sys-
tem 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 sys-
tem 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 must 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.
For more information about the installation of a
standby system contact a Generac Authorized
Service Dealer.
2.1.1 NFPA STANDARDS
The following published standards booklets pertain-
ing to standby electric systems are available form the
National
Fire
Protection
Batterymarch Park, Quincy, MA 02269:
• NFPA
No.
37,
STATIONARY
ENGINES AND GAS TURBINES.
• NFPA No. 76A, ESSENTIAL ELECTRICAL SYS-
TEMS FOR HEALTH CARE FACILITIES.
• NFPA No. 220, STANDARD TYPES OF BUILDING
CONSTRUCTION
NOTE:
Association
(NFPA),
COMBUSTION
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