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Section 1 -- General Information
CarrierAir-cooled 7 kW, 12 kW and 15 kW Generators
GENERAL
INFORMATION
Should the primary fuel need to be changed to LP gas,
the fuel system needs to be reconfigured. See Section
1.9 for instructions on reconfiguration of the fuel system.
Recommended fuels should have a Btu content of at
least 1,000 Btus per cubic foot for natural gas; or at least
2,520 Btus per cubic foot for LP gas. Ask the fuel supplier
for the Btu content of the fuel.
Required fuel pressure for natural gas is 5 inches to 7
inches water colum (0.18 to 0.25 psi); and for liquid
propane, 11 inches to 14 inches of water column (0.4
to 0.5 psi).
NOTE:
Any piping used to connect the generator to the fuel
supply should be of adequate size to ensure the fuel
pressure NEVER drops below 4 inches water colum
for natural gas or 10 inches water column for liquid
propane for all load ranges.
1.8 FUEL CONSUMPTION
*Natura{ gas is in cubic feet per hour.
**LP is in gatlons per hour/cubic feet per hour.
**_ Values given are approximate
Model # Nat. Gas (*)
1/2 Load FullLoad
6/7 kW 66 119
12 kW 152 215
13/15kW 156 220
LP Vapor (**)
1/2 Load Full Load
O.82/30 1.47/54
1.53/56 2.08/76
1.58/58 2.40/88
_ Gaseous fuels such as natural gas and liquid
propane (LP) gas are highly explosive. Even the
slightest spark can ignite such fuels and cause
an explosion. No leakage of fuel is permitted.
Natural gas, which is lighter than air, tends to
collect in high areas. LP gas is heavier than air
and tends to settle in low areas.
1.9 LOCATION
• 1.9.1 LIFTING THE GENERATOR
To lift the generator, insert pipe having sufficient strength
and diameter through the lifting holes which are located
near the unit's base (see Figure 1.1 and 1.2, page 5).
You may also lift the unit using a hook and hoist method
provided you utilize a spreader bar to ensure that the
lifting lines clear the roof panel.
z_ When lifting or hoisting equipment is used, be careful
not to contact overhead power lines.
_The .generator's weight of more than 300 pounds
requires proper tools, equipment and qualified
personnel to be used in all phases of handling and
unpacking.
• 1.9.2 GENERATOR
_lnstall the generator set, in its protective enclosure,
outdoors, where adequate cooling and ventilating air
is always available. Consider these factors:
• Install the unit where air inlet and outlet openings will
not become obstructed by leaves, grass, snow, etc. If
prevailing winds will cause blowing or drifting, consider
using a windbreak to protect the unit.
• Install the generator on high ground where water
levels will not rise and endanger it.
• Allow sufficient room on all sides of the generator for
maintenance and servicing. A good rule is to allow
three feet of space on all sides.
• Where strong prevailing winds blow from one direction,
face the generator air inlet openings to the prevailing
winds.
• Install the generator as close as possible to the fuel
supply, to reduce the length of piping.
• Install the generator as close as possible to the
transfer switch. HOWEVER, REMEMBER THAT
LAWS OR CODES MAY REGULATE THE
DISTANCE.
The genset must be installed on a level surface. The
base frame must be level within two (2) inches all around.
• 13.3 TRANSFER SWITCH
1.9.3.1 7 kW, 12 kW and 15 kW Units
The transfer switch shipped with this generator is
enclosed in a NEMA 1 enclosure. This type of
enclosure is intended for indoor use only. Follow
these rules:
• Install the transfer switch indoors on a firm, sturdy
supporting structure.
• To prevent switch distortion, level the switch if
necessary. This can be done by placing washers
between the switch enclosure and mounting surface.
• Never install the switch where water or any corrosive
substance might drip onto the enclosure.
• Protect the switch at all times against excessive
moisture, dust, dirt, lint, construction grit and corrosive
vapors.
oAwARN NcA-
_lf the AUTO/OFF/MANUAL switch is not set to
its OFF position, the generator can crank and
start as soon as the battery cables are
connected. If the utility power supply is not
turned off, sparking can occur at the battery
posts and cause an explosion.
Carrier 7