Kohler 3.5CFZ User Manual download pdf (Page 66)

TP-5695 12/936-4 Installation

Location

General

Consider the following in selecting or constructing a

generator set location.

Compartment/location must allow adequate space for

ventilation, cooling and exhaust system installation,

service access to the engine andgenerator, and proper

fuel system installation.

Engine stringers or other available structural members

must provide adequate support for the generator set

weight.

Ageneratorsetcompartmentmust be sealed toprevent

exhaust gases and fuel vapors from entering cabins.

Generator sets located above deck must have a

protective cover to prevent damage from rain and water

splash. This cover must not affect cooling air flow and

serviceability.

SeeFigure 6-4foratypicalinstallationandSection1.for

dimensions and weights.

Space

Locationshouldalloweasyaccesstothegeneratorset’s

engine,controller,cooling, and fuel systemcomponents

forroutineservice.Enginecompartmentsareoftenideal

generator set locations, but access should not be

obstructed by propulsion engines or generator and

controller. Also allow clearance for vibration during

operation. Minimum recommended clearance for

vibration and cooling of top, front, rear, and sides of

generator set is 1 1/2 in. (38 mm).

Mounting

Enginestringersgenerallyprovidethebestsupportfora

generator set. Any structural members considered for

mounting must support the generator set weight and

withstand engine vibration. The generator set includes

vibration mounts and mounting trays; additional

vibration isolating pads may be installed between trays

and bases.

A generator set should be mounted as high as possible

to avoid bilge splash and lower-lying vapors and also to

allow downward pitch of the exhaust line. For angular

installation, the maximum operation angle of the

engine/generator set is 20_ (in all directions).

Ventilation

Ventilation is required to support engine combustion,

generator cooling, and expulsion of flammable and

lethal fumes. Ventilation provisions must comply with

U.S.C.G. Regulations governing sizing of vents and

operator requirements.

As a rule, inlet and outlet vent areas should each be

sizedtoaminimumof2sq.in.perft.(13sq.cm/30.5cm)

of craft’s beam. Should this rule in any instance conflict

with U.S.C.G. Regulations, appropriate Regulations

should be followed. If any screening is used in inlets,

size of hull/deck openings should be doubled. Vent

ducts should extend to bilges to expel heavier-than-air

fumes.Ifthegeneratorsetistobemountedintheengine

compartment, air flow must be increased to allow for

generator set’s requirements. UL-listed ignition-

protected blowers should be installed in outlet vents,

and wired to operate before engine(s) are started.

Snifferdevices may also be optionally installed to cause

alarm, warning, or engine shutdown should dangerous

fumes accumulate in the compartment.

WARNING

Explosion.

Gasoline vapors can cause explosion and

severe injury or death.

Before starting generator set, operate blower 4

minutes and check engine compartment for

gasoline vapors.

Air requirements for various models are given in

Figure 6-5. The air intake silencer provides combustion

air to the engine. It is imperative that the recommended

minimum clearance of 1 1/2 in. (38 mm) between duct

opening and any enclosure wall not be compromised.

Engine/generator performance will be affected

adversely if these guidelines are not followed.

Air Requirements

CFM (L/min.)

Model Combustion Cooling

3.5CFZ 18 (510) 323 (9145)

4CZ 18 (510) 323 (9145)

5CFZ 18 (510) 600 (16988)

6.5CZ 18 (510) 600 (16988)

Figure 6-5. Air Requirements

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Kohler 3.5CFZ User Manual Page 66

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