Gillette Generators SPMD-2500 THRU SPMD-4000 - Manual (Page 15)

PAGE 15
It is, however, available as an option purchase.
GILLETTE does not offer the “Industrial” grade
muffler as it is very loud and is seldom satisfactory to
the end user. Muffler selections are: Residential
grade (reasonable quietness), “Critical” grade (very
quiet) or “Hospital” grade for ultimate silencing.
NOTE: The gen-set drawings on page 14 shows a
horizontal Hospital grade muffler. Residential or
Critical mufflers are mounted in a vertical position,
directly on the engine exhaust pipe, and exhaust flex
pipe mounted on muffler output. Consult factory for
special muffler mounting systems using catalytic
converters on EPA Certified exhaust emissions for
KW sizes 80, 100, 125, and 150. CAUTION: Outside
vertical exhaust pipes must use a rain cap; exhaust
pipe diameter size will increase as length of run
increases; flexible piping must be used at generator
exhaust beginning; exhaust outlets must be minimum
20 feet from building air intakes or located towards
prevailing wind directions; exhaust pipe sleeves or
thimbles must be used when exhaust pipe must pass
through a wall or partition.
ENGINE EXHAUST FUMES ARE EXTREMELY
DANGEROUS AND CAN CAUSE SEVERE ILLNESS
OR DEATH, IF BREATHED IN.
Never breath engine exhaust fumes produced by a
running generator set. Engine exhaust gases
produce a colorless, odorless, carbon monoxide
poison gas that can cause dizziness, nausea,
headaches, or vomiting. If this happens, get into a
fresh air environment quickly. Have someone with
safety breathing equipment stop the engine and
inspect the entire exhaust system for leaks or
improper installation.
GUIDELINES FOR A SAFE EXHAUST
SYSTEM
A) Do not allow engine exhaust gases to re-circulate
into engine’s cooling air input.
B) Use an exhaust pipe rain cap on vertical pipe
ending. Rain getting into exhaust pipe system will
cause eventual corrosion and damage to the entire
exhaust system.
C) The remote muffler must be mounted as close to
the engine as possible, or it will “carbon up” if its
operating temperature is too low.
D) If installation calls for a Cowl, Residential, or
Critical grade muffler, it will be factory mounted
directly on the engine exhaust manifold pipe, along
with a short 6” pipe as it is compact and light weight.
Then install a 12” to 15” exhaust pipe on muffler
exhaust end, then install a 12” to 15” flexible exhaust
DANGER
Pipe, which both is ordered as optional equipment.
This short pipe run between muffler and flexible pipe
allows the exhaust gases to cool and extend the life of
the flexible pipe. NOTE: Flexible exhaust pipe
must be stainless steel.
E) Water/condensation is a byproduct of engine
combustion and is present in exhaust pipe
installations. This water should be kept away from
draining back into the engine. This can be done by
slightly slanting the horizontal exhaust pipe section
downward. A water trap consisting of a pipe tee and
drain cock should also be provided. See following
suggested diagrams.
1. Exhaust Wall Thimble
2. Cowl Muffler
3. 45° Y-Pipe
4. Condensation Trap
5. Drain Plug
6. Saddle Clamp
7. Flex Pipe
8. Short Pipe
9. 45° Elbow
10. Existing Engine
Exhaust Manifold Pipe
Residential and Critical Muffler with Vertical Installation
for Models SP-200 thru SP-620
FIGURE 7
10
Hospital
Grade
1. Exhaust Wall Thimble
2. Hospital Muffler
3. 45° Y-Pipe
4. Condensation Trap
5. Drain Plug
6. Saddle Clamp
7. Flex Pipe
8. Engine Exhaust Manifold Pipe
9. 45° Elbow
FIGURE 6
1
2
3
4
5
6
7
8
9
1
2
3
4
5
9
6
7
8