Generac Mobile MGG450, Руководство пользователя

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16 Owner’s Manual for MGG450
Operation
Starting the Generator
(000168)
DANGER
Explosion and Fire. Fuel and vapors are
extremely flammable and explosive. Keep fire
and spark away. Failure to do so will result
in death or serious injury.
NOTE: After initial power on (after battery disconnect is
switched from OFF to ON) the controller will display the
following errors, which are normal during a controller
power loss:
• Sd ECU
• Fuel Not Ready
The “Sd ECU” error can be cleared immediately and the
“Fuel Not Ready” will clear automatically in 30 seconds.
The user will be unable to start the unit during this time.
This unit is designed to operate on Natural Gas (NG),
non-commercial fuels ranging in lower heating value from
1000 BTU/ft
3
(37,259 kJ/m
3
) to 2000 BTU/ft
3
(74,518 kJ/
m
3
), or LP liquid. At oil well sites, LP liquid is typically
used to start the unit until the pump jack brings the well
gas (non-commercial fuel) up to the surface. In automatic
mode, the unit’s fuel system will detect when there is
sufficient pressure to switch to well gas as the primary
fuel source.
Automatic Fuel Switching
In automatic fuel selection mode, unit detects loss of
gaseous fuel supply pressure and switches to LPG-liquid
fuel operation. Unit will return to gaseous fuel supply
operation when pressure has been present for more than
30 minutes. Current fuel operation is shown on fuel
selection screen (
Figure 2-5 ). If problems with the
automatic fuel switch occur:
• Verify both NG and LPG-liquid fuels are present at
fuel inlets
• Verify engine block coolant hose shut-off valves
are open
• Verify pressure switch is set to 1.5-2 psi (10-14
kPa).
• Verify primary LPG-liquid shut-off valve filter
screen is not plugged
Natural Gas Only Operation
Table 3-2. Gas Pressure
Utility (without
scrubbing system; not
recommended for
well gas use)
5 psi (34.5 kPa) minimum
50 psi (345 kPa) maximum*
Well Gas (with
scrubbing system) 40 psi (276 kPa) minimum
300 psi (2068 kPa) maximum
* Requires that everything upstream from the 2 in. ball
valve has been removed or bypassed.
If there is sufficient pressure in the gaseous fuel inlet
(
Table 3-2 ), the unit can be started directly on natural
gas:
1.
Open the manual ball valve located just outside the
frame.
2.
Check for any leaks in the gas line.
3.
Push the down arrow on the controller until you
reach the fuel selection screen.
4.
Push the soft key just below the NG ON display on
the digital controller. Controller will illuminate the
NG commercial fuel green.
5.
Push the up arrow on display to return to home
metering screen.
6.
Push the soft key just below the mode label, select
MANUAL mode, and press ENTER.
7.
Push the START. If engine fails to start, see
General Troubleshooting Guide .
Non-Commercial (Well Gas) Only Operation
If there is sufficient pressure in the gaseous fuel line
(
Table 3-2 ), the unit can be started directly on well gas
(non-commercial):
1.
Open the manual ball valve located just outside the
frame.
2.
Check for any leaks in the gas line.
3.
Push the down arrow on the display to display the
fuel selection screen.
4.
Push the soft key just below the IBTU ON display
for fuels with a lower heating value range of 1000-
1500 BTU/ft
3
(55,888 kJ/m
3
), or press the hBTU
ON button for fuels with a lower heating value
range of 1500-2000 BTU/ft
3
(55,888-74,518 kJ/
m
3
). If the fuel energy content is unknown, select
hBTU ON and see step 8.
NOTE: Only one gaseous fuel selection can be selected
at a time. Multiple selections will default to the fuel
selection with higher energy content.