Installation - Onan DYG Series Operator's Manual And Parts Catalog

INSTALLATION
GENERAL
Installations must be considered indiyidually. Use .
these instructions as a general guide. /Meei
regulations of local building codes, fire ordinances, "
etc., which may affect installation details. See Figure
5.
Installation points to consider include:
1. Level mounting surface.
2. Adequate cooling air.
3. Adequate fresh induction air.
4. Discharge of circulated air.
5. Discharge of exhaust gases.
6. Electrical connections.
7. Fuel connections.
8. Water connections.
9. Accessibility for operation and servicing.
10. Vibration isolation.
11. Noise levels.
LOCATION
Provide a location that is protected from the weather
and is dry, clean, dust free and well ventilated. If
practical, install inside a heated building for protec-
tion from extremes in weather conditions.
MOUNTING
Generating sets are mounted on a rigid skid base
which provides proper support. Install vibration
isolators between skid base and foundation. For
convenience in draining crankcase oil and general
servicing, mount set on raised pedestals (at least 6-
inches [150 mm] high). If mounting in atrailer, o r f o r
other mobile applications, bolt securely in place.
Extra support for the vehicle flooring may be
necessary. Bolting down is recommended for
stationary installations.
VENTILATION
Generating sets create considerable heat which must
be removed by proper ventilation. Outdoor in-
stallations rely on natural air circulation but mobile
and indoor installations need properly sized and
positioned vents for the required air flow. See
Specifications for the air required to operate with
rated load under normal conditions at 1800 rpm.
Radiatorset cooling airtravels from the rear of theset
to the front end. Locate the room or compartment air
inlet where most convenient, preferably to the rearof
the set. Make the inlet opening at least as large as the
radiator area (preferably 1-1/2 times larger).
Engine heat is removed by a pusher fan which blows
cooling air out through the front of the radiator.'
Locate the cooling air outlet directly in front of the
radiator and as close as practical. The opening size
should be at least as large as the radiatorarea. Length
and shape of the airoutletductshould offerminimum
restriction to air flow. Use a duct of canvas or sheet
metal between the radiatorand theairoutletopening.
The duct prevents recirculation of heated air.
Provide a means of restricting the air flow in cold
weather to keep the room or compartment
temperature at a normal point. *
A shelter housing with electrically operated louvres is
available as an option. Transformers connected
across the generator output supply current to the
motors.
When the generator is operating, current in the
transformers actuate the motors and open the
louvres. The louvres are held open for the du ration Of
the set operation, then are closed by return springs
when the set is shut down.
City water cooled sets do not use the conventional
radiator. A constantly changing water flow cools the
engine. Ventilation is seldom a problem, but sufficient
air movement and fresh air must be available to
properly cool the generator, disperse heat convected
off the engine and support combustion in the engine.
Forsmall compartments, a duct of equal or larger area
than generator outlet is recommended to remove the
heated air from the generator air outlet to the outside
atmosphere. Limit bends and use radius type elbows
where needed. A larger, well ventilated compartment
or room does not require a hot air duct.
Installations made in a small room may require
installation of an auxiliary fan (connected to operate
only when the plant is running) of sufficient size to
assure proper air circulation.
' 13