Powermate P1204 User Manual
Page 14
200-2667
14
The engine driving the generator is engineered to
provide reliable power on either Liquefied Propane Vapor
(LPG) or Natural Gas. For proper operation on these
fuels, it is important to deliver gas with adequate energy
content, at sufficient pressure and flow rate. This
generator is designed to operate on Liquefied Propane
Vapor (LPG) with a minimum energy content of 2500
BTU per cubic foot or Natural Gas with a minimum
energy content of 1000 BTU per cubic foot. This
generator is designed to operate with a fuel pressure at
the inlet of the unit between 6 and 11 inches of water
column (4-6 ounces).
Required fuel flow rates for specific models are given
in the table below. To insure correct sizing of the piping
supplying fuel to the generator set, provide the flow and
pressure requirements of this section to a fuel supplier or
licensed plumber during the installation planning stage. If
the fuel supplier cannot guarantee delivery of fuel with
these properties, the generator may not perform as
advertised.
Due to differences in the energy content of fuel used,
it is necessary to derate the output of the generator when
connected to Natural Gas. Additionally, regional and/or
seasonal variations in the makeup of the fuel can further
affect output of the engine/generator system. When
using Natural Gas fuel with minimum properties as
defined, engine output can fall approximately 10% below
that of the same set using Propane Vapor.
Per the National Gas Code (NFPA 54 - ANSI
2223.1), a manual shutoff valve in the fuel supply line
to the generator is recommended.
FUEL REQUIREMENTS:
For the best operation of the unit, the fuels used
should have a minimum content of 1000 BTU’s per cubic
foot for Natural Gas (NG) and 2520 BTU’s per Cubic foot
for Liquid Propane vapor (LPG). Contact local fuel
supplier for local BTU content. Fuel supply pressures
must be between 4oz (6” H
2
0 per square inch) and 6oz
(11” H
2
0 per square inch) at the inlet to the unit.
After electrical connections are complete, the next
installation step is to connect a fuel supply to the unit.
The fuel inlet fitting supplied with the generator is male
3/4" NPT. To accommodate potential settling of the
generator relative to rigid supply pipeline, use of a
flexible line, provided by manufacturer, in the supply line
is suggested. When making connections, use only
materials rated for the fuel supplied and approved for use
by local, regional or national codes and/or regulatory
agencies.
F
F
F
F
U
U
U
U
E
E
E
E
L
L
L
L
S
S
S
S
P
P
P
P
E
E
E
E
C
C
C
C
II
II
F
F
F
F
II
II
C
C
C
C
A
A
A
A
T
T
T
T
II
II
O
O
O
O
N
N
N
N
S
S
S
S
A
A
A
A
N
N
N
N
D
D
D
D
C
C
C
C
O
O
O
O
N
N
N
N
S
S
S
S
U
U
U
U
M
M
M
M
P
P
P
P
T
T
T
T
II
II
O
O
O
O
N
N
N
N
R
R
R
R
E
E
E
E
Q
Q
Q
Q
U
U
U
U
II
II
R
R
R
R
E
E
E
E
M
M
M
M
E
E
E
E
N
N
N
N
T
T
T
T
S
S
S
S
W
WA
AR
RN
NIIN
NG
G
•
Natural gas (NG) is highly explosive.
•
Natural gas (NG) is lighter than air and will
collect in high places.
•
Liquid propane vapor (LPG) is highly explosive.
•
Liquid propane vapor (LPG) is heavier than air
and will collect in lower places.
•
Extreme caution should be taken when working
on a new installation or while performing
general maintenance.
•
Do not smoke when near the unit.
•
Keep flames, sparks, pilot lights, arc-producing
equipment, switches and all other sources of
ignition well away. Keep a type ABC fire
extinguisher handy.
•
Potential for fire or explosion always exist when
using natural gas (NG) or liquid propane vapor
(LPG) as a fuel source. Install this unit in
compliance with all local fuel codes.
•
Do Not operate engine if smell of fuel is present
or other explosive conditions exist.
D
DA
AN
NG
GE
ER
R
F
F
F
F
U
U
U
U
E
E
E
E
L
L
L
L
H
H
H
H
O
O
O
O
O
O
O
O
K
K
K
K
U
U
U
U
P
P
P
P
D
DA
AN
NG
GE
ER
R
•
All fuel system installations MUST BE done by a
licensed plumber or licensed gas technician
and must comply with all applicable codes,
standards and regulations.
W
WA
AR
RN
NIIN
NG
G
•
Natural Gas and Propane Vapor are highly
explosive gases. Check ALL fuel system
connections for leaks before starting
engine/generator set.
•
DO NOT use a flame to check for leaks.
•
Use approved equipment and methods to check
for leaks.
FUEL CONSUMPTION TABLE
P120401
Fuel Consumption (@100%
load)
3.44 Gal/Hr (LP)
280 Cu-ft/Hr (NG)
All values reflect consumption at 100% rated output.
•
All fuel system installations MUST BE done by a
licensed plumber or licensed gas technician
and must comply with all applicable codes,
standards and regulations.