Page 7
60707-117
8199-00
Natural Gas
1
3
4
UNIT OFF
LINE PSI
7-11 in
7-11 in
4-6 oz
4-6 oz
STARTING
LINE PSI
7-11 in
7-11 in
4-6 oz
4-6 oz
NO LOAD
LINE PSI
7-11 in
7-11 in
4-6 oz
4-6 oz
FULL LOAD LINE PSI
7-11 in
7-11 in
4-6 oz
4-6 oz
Remember that whichever fuel delivery system or type of
vapor fuel used, the fuel pressure at the demand regulator
installed on the engine generator must be between 4 and 6
oz. (7-11 inches of water column). Any lower pressure and
the unit will starve for fuel under load. Any higher and the
unit will ‘flood’ when attempting to start.
LP TANK SIZING
Once above the minimum acceptable size, the size of L.P.
tank used will generally depend on how long you want the
unit to run without refilling. The tank sizes shown below are
the smallest recommended tank sizes based on the outside
temperature. Keep in mind the colder it gets the slower L.P.
will vaporize. This is the reason for the larger tanks at low
temperature. Minimum sizing is not based on running time.
Temp
60 deg f.
30 deg f.
0 deg f.
-20 deg f.
HPS6000HE
40 gal
50 gal
125 gal
350 gal
HPS9000E
70 gal
80 gal
200 gal
700 gal
HPS12000HE
150 gal
250 gal
500 gal
1000 gal
CHANGING FUEL TYPES
These engine generator sets are designed to run on three
different fuels; gasoline, natural gas or LP vapor. They may
be easily changed from one fuel to another.
FROM GASOLINE TO LP/NG
1. With the engine running turn off the gasoline
fuel valve.
2. Run the engine until it runs out of fuel.
3. Remove the pipe plug from the demand
regulator.
4. Install locally approved flexible fuel line.
5. Connect the LP/NG vapor fuel line.
6. All three unit have two different hose fittings on the
top of the demand requlator. One is for LP and one is
for Natural Gas. Make sure the hose is attached to the
proper fitting.
7. Turn on the vapor fuel.
8. Start the engine.
9 . Apply the load to the generator.
FROM LP/NG TO GASOLINE
1. With the engine running turn off the LP/NG fuel
supply.
2. Run the engine until it runs out of fuel.
3. Remove the flexible fuel line from the demand
regulator.
4. Reinstall the plastic plug in the regulator.
5. Check to be sure the gasoline fuel valve is off.
6. Fill the gasoline fuel tank.
7. Turn on the gasoline fuel valve.
8. Start the engine.
Optional Dolly Kit
(HPS9000 & HPS6000)
An optional dolly kit is available for these engine generator
sets. The dolly kit comes with instructions and parts list.
After installing the dolly kit, file the instructions and parts list
in the back of this manual for future reference. The
HPS12000HE is shipped standard with a dolly kit.
INITIAL START UP
Use the following checklist to verify the correct preparation
of the engine generator before starting.
Before Starting always Check:
1. Engine oil, fill as required with correct grade and
quantity. Use the dipstick.
2. Fuel level, fill as required with clean fresh fuel.
3. If you are using LP or NG besure the fuel is turned
on and all connection are tight.
3. Visually for loose parts.
STARTING
The throttle control on these generators is preset and locked
to operate at 3600 RPM (nominal) with no load speed set at
3750 RPM. Only a trained service technician should be
allowed to adjust this speed setting. See “Operating Speed”
section for additional information.
NOTICE: ENGINE START LOCKOUT
This unit will not start if it is low on oil. The lubricating oil
level must be at the full mark before the engine will start.
MANUAL STARTING - Refer to the engine manual for
additional starting, operating, and stopping instructions.
NOTICE: TRI-FUEL STARTING
Tri-Fuel generators operating on vapor fuel, (either LP or
NG) must be started using the electric start system
provided. You cannot hand crank the unit fast enough to
develop the proper vacuum to make the vapor fuel system
work. WHEN USING VAPOR FUEL NEVER USE THE
CHOKE. Use of the choke will prevent the air and fuel
from properly mixing.
