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Owner’s Manual for MGG450

Operation

Fuel Scrubbing System

This  unit  is  equipped  with  a  two-stage  gas  filtration
system. Once the gas enters the unit at a minimum of 40
psi (276 kPa) and a maximum of 300 psi (2068 kPa), it
goes  through  the  primary  pressure  regulator.  This  will
bring the gas pressure down to 30 psi (413 kPa). The gas
will  then  go  through  the  first  stage  of  scrubbing  in  the
cyclonic separator.
The  second  stage  is  the  coalescing  filter.  This  stage
removes  99%  of  solid  or  liquid  0.01μm  or  larger.  Both
units are equipped with an automatic drain system which
allows any particles removed from the gas stream to be
evacuated  from  the  generator  through  a  port  on  the
frame rail.

IMPORTANT NOTE: Altering the fuel scrubbing
system will void the warranty.

NOTE:

A minimum of 10 psi (68.95 kPa) is required in

order for the auto drain ports to seal properly.

System Set Up

The  regulator  is  factory-set  at  30  psi  (413  kPa)  prior  to
gas introduction. The 30 psi (413 kPa) setting is achieved
by  removing  the  adjustment  screw  protective  cap  and
loosening  the  locknut.  Output  pressure  is  increased  by
turning  the  adjustment  screw  clockwise,  while  turning  it
counterclockwise decreases the outlet pressure. Use the
downstream gauge to set the outlet pressure correctly.
Once the desired outlet pressure is achieved, the locknut
should be tightened and the protective cap replaced.

Electrical Connections

(000188)

DANGER

Electrocution. Do not wear jewelry while
working on this equipment. Doing so will
result in death or serious injury.

(000150)

DANGER

Electrocution. Never connect this unit to the electrical
system of any building unless a licensed electrician
has installed an approved transfer switch. Failure to
do so will result in death or serious injury.

(000151a)

DANGER

Explosion and fire. Connection of fuel source must be
completed by a qualified professional technician or
contractor. Incorrect installation of this unit will result in
death, serious injury, and property and equipment damage.

(000152)

DANGER

Electrocution. Verify electrical system is
properly grounded before applying power.
Failure to do so will result in death or serious
injury.

Class  1  wiring  methods  must  be  used  for  field  wiring
connections  to  terminals  of  a  class  2  circuit.  It  is  the
responsibility  of  the  owner  to  arrange  for  these
procedures  to  be  performed  by  a  licensed  electrical
contractor  and  verify  conformance  to  all  applicable
codes, including local codes specific to your municipality/
city/county and state. Wire size and insulation type must
meet  National  Electrical  Code  (NEC)  and  local
regulations.

NOTE:

NEC requires the frame and exposed conductive

surfaces (metal parts) be connected to an approved earth
ground. Local regulations may also require proper
grounding of generator systems. Check local regulations
for generator system grounding requirements.

Prestart Checklist

CAUTION

(000153b)

Equipment damage. Always measure the alternator
insulation resistance before operating unit in damp or humid
conditions, and dry windings as needed. Failure to do so
could result in genset and property damage.

•

Verify battery disconnect switch is ON

•

Verify unit is positioned stably

•

Verify proper clearance exists on all sides and top

of enclosure

•

Verify unit is a safe distance from any flammable or

combustible material

•

Verify no load is connected to unit