Install Manual

TP-6906 6/1432 Section 1 Installation Instructions
1.6.1 Fu el Lines
Gas lines. Never use fuel piping to ground electrical
equipment. The gas supplier is responsible for
installation, repair, and alteration to gas piping.
Use Schedule 40 black-iron pipe for gas piping. Copper
tubing may be u sed if the fuel does not contain hydrogen
sulfide or other ingredients that react chemically with
copper.
Line size. Size piping according to the requirements of
the equipment. The type of fuel, the distance it must
travel from gas meter/tank to fuel shutoff solenoid, and
the amount consumed by the engine must be
considered when determining fuel line pipe size.
In addition to actual fuel consumption, consider the
following pressure loss factors:
D Pipe length
D Other appliances on the same fuel supply
D Number of fittings
Measure the pipe length from the primary gas pressure
regulator to the pipe connection on the generator set
fuel inlet. Add 2.4 m (8 ft.) to the measured length for
each 90 degree elbow. Use the pipe size indicated in
Figure 1-19 for the total length of pipe.
Figure 1-19 is based on gas pressures of 3.4 kPa
(0.5 psi, 13.8 in. water column) or less and a p ressure
drop of 0.12 kPa (0.018 psi, 0.5 in. water column) with a
0.60 specific gravity and with a normal amount of
restriction from fittings. The LPG flow has been
corrected for specific gravity to determine the pipe sizes
shown in the table.
Flexible connections. Rigid mount the piping but
protect it from vibration. Use flexible connections
spanning a minimum of 152 mm (6 in.) between the
stationary piping and the engine fuel inlet connection.
Model Fuel
Maximum Fuel Flow
Rate@ Full Load
Nominal I ron Pipe Size, in.
Model Fuel
Maximum Fuel Flow
Rate@ Full Load
Pipe Length, m (ft)
cfh
LPG cfh
corrected
3.0
(10)
6.1
(20)
12.2
(40)
18.3
(60)
24.4
(80)
30.5
(100)
45.7
(150)
61.0
(200)
24RCL
LPG 113 179 3/4 1 11/4 11/4 11/4 11/4 11/2 11/2
NG 301 NA 1 11/4 11/4 11/2 11/2 11/2 2 2
30RCLH
LPG 178 281 3/4 1 11/4 11/4 11/4 11/4 11/2 11/2
NG 634 NA 1 11/4 11/4 11/2 11/2 11/2 2 2
Figure 1-19 Fuel Pipe Sizes