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Onan NH Series User Manual

Onan NH Series
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INSTALLATION
Consider each installation individually.
Use
these
instructions
as a
guide
in
obtaining
a
safe
and
efficient installation. Consult your local building
inspector
for
information
on
local building codes, fire
ordinances, etc. before installing yourgenerating set.
Some important installation considerations
are:
Location
and
Mounting
Sufficient ventilation
and
cooling
Fuel
and
electrical connections
Exhaust
gas
discharge
LOCATION
AND
MOUNTING
Providea protected location that is dry, dust-freeand,
preferably, heated
in
cold weather. Allow
at
least
24
inches around
the
installation
for
service
and
maintenance
of the
unit. Figure 1 illustrates atypical
installation
for a
pressure-cooled generating
set.
Permanent installations need a sturdy, level mounting
base
of
concrete, heavy wood, structural steel
or
other sturdy support
at
least
12
inches high
to aid
routine maintenance, operation
and
service.
LOCATE BASE
TO
ALLOW
AT LEAST
•24"
SPACE
ON
ALL SIDES
FIGURE 1. TYPICAL INSTALLATION
CARRIAGE BOLT
SQUARE
NUT
LOCK WASHER
FLAT WASHER
SNUBBER
GENERATOR
OR
OIL BASE MOUNTING
FOOT
CUSHION
MOUNTING SPACER
BUSHING
FLAT WASHER
FIGURE 2. VIBRATION ISOLATOR
Assemble the vibration isolators as shown
in
Figure 2.
The spacer bushing prevents compression
of the
snubber
or
upper rubber cushion.
Two
vibration
isolators
are for
the engine-end only and
two are for
the generator-end only. Use them
in
their respective
positions
to
avoid undesirable vibration resulting
from improper cushioning.
The
spacing
for the
mounting bolts
is
18-5/16"
x 12"
prior
to
Spec
D;
begin Spec
D,
spacing
is
17-5/16" x,12".
VENTILATION
AND
COOLING
Air circulation
is
needed
to
dissipate heat produced
by
the
engine
and
generator
in
normal operation.
Outdoor installations can rely
on
natural circulation,
but indoor
or
housed installations need properly
sized
and
positioned vents
for
required airflow.
See
Specifications
for the air
requirements.
Vent sizes depend
on
variable conditions:
1.
Size
of
enclosure
2.
Ambient temperature
3. Electrical load
4.
Running time

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Onan NH Series Specifications

General IconGeneral
Frequency60 Hz
Engine Type4-Cycle
Fuel TypeGasoline
Starting SystemElectric
Voltage120/240V
Noise Level72 dB(A) at 7 meters
Fuel Consumption0.5-1.0 gal/hr (gasoline)

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